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EDITORIALS AND ANNOUNCEMENTS

Editorial: Promoting Inclusive and Respectful Communications

Michael Thoennessen

Phys. Rev. Research 2, 040001 (2020) - Published 18 November, 2020

HIGHLIGHTED ARTICLES

Magnetic field-induced vortex triplet and vortex lattice in a liquid crystal cell

Enrique Calisto, Marcel G. Clerc, and Valeska Zambra

Phys. Rev. Research 2, 042026(R) (2020) - Published 10 November, 2020

The authors show the emergence of a vortex triplet and a topological vortex lattice as a consequence of the combined effect of a magnetic ring and the uniform electric field onto a homeotropic nematic liquid crystal.

Labyrinthine patterns transitions

S. Echeverría-Alar and M. G. Clerc

Phys. Rev. Research 2, 042036(R) (2020) - Published 7 December, 2020

The authors show the short range-order of labyrinthine patterns as a single wavenumber behavior, classify different types of labyrinths, and reveal the bifurcations between them.

Traversable wormhole and Hawking-Page transition in coupled complex SYK models

Sharmistha Sahoo, Étienne Lantagne-Hurtubise, Stephan Plugge, and Marcel Franz

Phys. Rev. Research 2, 043049 (2020) - Published 8 October, 2020

The authors study the coupling of two SYK models with U(1) symmetry and show the onset of various phases with holographic duals

Nuts and bolts of supersymmetry

Nitin Upadhyaya, Bryan G. Chen, and Vincenzo Vitelli

Phys. Rev. Research 2, 043098 (2020) - Published 19 October, 2020

This article describes a class of nonlinear topological mechanical systems whose continuum elasticity displays connections with the supersymmetric field theory introduced by Witten and Olive.

Improving key rates of the unbalanced phase-encoded BB84 protocol using the flag-state squashing model

Nicky Kai Hong Li and Norbert Lütkenhaus

Phys. Rev. Research 2, 043172 (2020) - Published 2 November, 2020

The authors show the emergence of secret keys in the BB84 protocol in the low-loss regime.

Self-waveguiding of relativistic laser pulses in neutral gas channels

L. Feder, B. Miao, J. E. Shrock, A. Goffin, and H. M. Milchberg

Phys. Rev. Research 2, 043173 (2020) - Published 3 November, 2020

The authors show that an ultrashort, relativistic intensity laser pulse can propagate for hundreds of Rayleigh ranges in a prepared neutral hydrogen channel by generating its own plasma waveguide as it propagates.

Counterdiabatic control of transport in a synthetic tight-binding lattice

Eric J. Meier, Kinfung Ngan, Dries Sels, and Bryce Gadway

Phys. Rev. Research 2, 043201 (2020) - Published 9 November, 2020

The authors test a shortcut-to-adiabaticity scheme by directly countering diabatic transitions which occur during several experiments with time-dependent, many-level systems of ultracold atoms in a synthetic lattice.

Testing dissipative collapse models with a levitated micromagnet

A. Vinante, G. Gasbarri, C. Timberlake, M. Toroš, and H. Ulbricht

Phys. Rev. Research 2, 043229 (2020) - Published 13 November, 2020

The authors summarize the dissipative extensions of spontaneous wavefunction collapse models and derive new exclusion limits on the parameters of different models from an experiment based on a micromagnet levitated by Meissner effect.

Universal finite-time thermodynamics of many-body quantum machines from Kibble-Zurek scaling

Revathy B. S, Victor Mukherjee, Uma Divakaran, and Adolfo del Campo

Phys. Rev. Research 2, 043247 (2020) - Published 18 November, 2020

The authors show that when the operation of a quantum machine drives the working substance across a phase transition, its finite-time thermodynamics is universal.

Rényi entropy singularities as signatures of topological criticality in coupled photon-fermion systems

F. P. M. Méndez-Córdoba, J. J. Mendoza-Arenas, F. J. Gómez-Ruiz, F. J. Rodríguez, C. Tejedor, and L. Quiroga

Phys. Rev. Research 2, 043264 (2020) - Published 20 November, 2020

This work reports a direct relation between a quantum entanglement entropy and photon observables for a topological chain embedded in a microwave cavity.

From compact localized states to many-body scars in the random quantum comb

Oliver Hart, Giuseppe De Tomasi, and Claudio Castelnovo

Phys. Rev. Research 2, 043267 (2020) - Published 20 November, 2020

This work explores the behavior of quantum particles hopping on a comb-like lattice with structural disorder. The authors find a family of exact states with strictly zero localization length, which survive the addition of interactions.

Full-dimensional quantum scattering calculations on ultracold atom-molecule collisions in magnetic fields: The role of molecular vibrations

Masato Morita, Jacek Kłos, and Timur V. Tscherbul

Phys. Rev. Research 2, 043294 (2020) - Published 30 November, 2020

The authors present quantum dynamics calculations on strongly anisotropic Li + CaH collisions at ultralow temperatures in the presence of an external magnetic field, and show the role of vibrational degrees of freedom in determining the properties of magnetic Feshbach resonances in ultracold atom-molecule collisions.

Floquet dynamics in light-driven solids

M. Nuske, L. Broers, B. Schulte, G. Jotzu, S. A. Sato, A. Cavalleri, A. Rubio, J. W. McIver, and L. Mathey

Phys. Rev. Research 2, 043408 (2020) - Published 22 December, 2020

This work discusses the transport properties of light-induced electronic Floquet states in solids. The authors provide an interpretation of the Hall conductivity in periodically driven graphene as a geometric-dissipative effect.

RAPID COMMUNICATIONS

General Bayesian theories and the emergence of the exclusivity principle

Giulio Chiribella, Adán Cabello, Matthias Kleinmann, and Markus P. Müller

Phys. Rev. Research 2, 042001(R) (2020) - Published 5 October, 2020

This article shows that a significant part of the set of quantum correlations can be derived from basic Bayesian principles about how agents should assign probabilities to the outcome of their experiments.

Generalized overlap quantum state tomography1

Rajveer Nehra, Miller Eaton, Carlos González-Arciniegas, M. S. Kim, Thomas Gerrits, Adriana Lita, Sae Woo Nam, and Olivier Pfister

Phys. Rev. Research 2, 042002(R) (2020) - Published 7 October, 2020

The authors show a quantum state tomography scheme with excitation counting for bosonic systems

Excitation pathways in resonant inelastic x-ray scattering of solids

Christian Vorwerk, Francesco Sottile, and Claudia Draxl

Phys. Rev. Research 2, 042003(R) (2020) - Published 7 October, 2020

This work introduces a first-principles many-body framework to describe resonant inelastic x-ray scattering as a coherent sum of pathways between excited many-body states.

Emergence of chaos and controlled photon transfer in a cavity-QED network

Amit Dey and Manas Kulkarni

Phys. Rev. Research 2, 042004(R) (2020) - Published 9 October, 2020

The authors discuss a nonlinear stimulated Raman adiabatic passage realizable in cavity-QED networks and show an strategy to enhance the efficiency of population and quantum state transfer in the presence of chaos.

Hidden antiferronematic order in Fe-based superconductor BaFe2As2 and NaFeAs above TS

Seiichiro Onari and Hiroshi Kontani

Phys. Rev. Research 2, 042005(R) (2020) - Published 12 October, 2020

The authors propose an explanation to the hidden nematic state in Fe-based superconductors based in the onset of an antiferro bond

Forward and inverse design of kirigami via supervised autoencoder

Paul Z. Hanakata, Ekin D. Cubuk, David K. Campbell, and Harold S. Park

Phys. Rev. Research 2, 042006(R) (2020) - Published 12 October, 2020

The authors develop a supervised autoencoder to perform forward and inverse design of graphene kirigami. By interpolating in the latent space of kirigami structures, the supervised autoencoder generates designs that mix parallel and orthogonal cuts.

Multiple spin-orbit excitons and the electronic structure of αRuCl3

P. Warzanowski, N. Borgwardt, K. Hopfer, J. Attig, T. C. Koethe, P. Becker, V. Tsurkan, A. Loidl, M. Hermanns, P. H. M. van Loosdrecht, and M. Grüninger

Phys. Rev. Research 2, 042007(R) (2020) - Published 13 October, 2020

This paper reports reports on the spin-orbit exciton and its crystal-field splitting in α-RuCl3, as observed in Raman and infrared spectroscopy and show the onset of a j=1/2 scenario and signatures of dominant Kitaev exchange.

Binding self-propelled topological defects in active turbulence

Kristian Thijssen and Amin Doostmohammadi

Phys. Rev. Research 2, 042008(R) (2020) - Published 13 October, 2020

The authors show the emergence of stable self-propelled bound defects in monolayers of active nematics due to alignment of active particles to their self-generated flows, generating virtual full-integer topological defects in the form of vortices and asters.

Zero-point excitation of a circularly moving detector in an atomic condensate and phonon laser dynamical instabilities

Jamir Marino, Gabriel Menezes, and Iacopo Carusotto

Phys. Rev. Research 2, 042009(R) (2020) - Published 14 October, 2020

This papers connect superradiance in rotational black holes with the physics of circularly moving impurities in weakly interacting Bose gases.

Axionic band topology in inversion-symmetric Weyl-charge-density waves

Benjamin J. Wieder, Kuan-Sen Lin, and Barry Bradlyn

Phys. Rev. Research 2, 042010(R) (2020) - Published 14 October, 2020

The authors show that the axionic physics attributed to Weyl-Charge-density waves is captured by the single-particle states in mean-field theory

Transverse chiral magnetic photocurrent induced by linearly polarized light in mirror-symmetric Weyl semimetals

Sahal Kaushik, Dmitri E. Kharzeev, and Evan John Philip

Phys. Rev. Research 2, 042011(R) (2020) - Published 14 October, 2020

This work proposes a chiral photocurrent transverse to the direction of an external magnetic field in response to linearly polarized light in Weyl semimetals with reflection symmetry, including the TaAs class of materials.

Cavity formation in deformed amorphous solids on the nanoscale

Kallol Paul, Ratul Dasgupta, Jürgen Horbach, and Smarajit Karmakar

Phys. Rev. Research 2, 042012(R) (2020) - Published 15 October, 2020

This work studies the failure mechanisms in amorphous solids at nanometer scales.

Quantum simulation of two-dimensional quantum chemistry in optical lattices

Javier Argüello-Luengo, Alejandro González-Tudela, Tao Shi, Peter Zoller, and J. Ignacio Cirac

Phys. Rev. Research 2, 042013(R) (2020) - Published 16 October, 2020

The authors propose to explore the electronic states of chemistry models using fermionic cold atoms trapped in an optical lattice as a simulator. They show that different schemes can be used to induce an effective repulsion among these simulated electrons, and numerically benchmark the effect of discretization for simple molecules.

Engineering two-qubit mixed states with weak measurements

Parveen Kumar, Kyrylo Snizhko, and Yuval Gefen

Phys. Rev. Research 2, 042014(R) (2020) - Published 19 October, 2020

The authors devise protocols of state engineering by weak measurements, in order to steer a two-qubit system into an arbitrary, pre-designated state.

Enhanced laser intensity and ion acceleration due to self-focusing in relativistically transparent ultrathin targets

T. P. Frazer, R. Wilson, M. King, N. M. H. Butler, D. C. Carroll, M. J. Duff, A. Higginson, J. Jarrett, Z. E. Davidson, C. Armstrong, H. Liu, D. Neely, R. J. Gray, and P. McKenna

Phys. Rev. Research 2, 042015(R) (2020) - Published 19 October, 2020

This work shows that a high power pulse of laser light propagating in a relativistically transparent target plasma self-focuses, enhancing the laser intensity achieved and the energies to which plasma ions are accelerated.

Similarity of internal and external friction: Soft matter frictional instabilities obey mean field dissipation through slip avalanches

S. Zheng, J. M. Urueña, A. C. Dunn, J. T. Uhl, and K. A. Dahmen

Phys. Rev. Research 2, 042016(R) (2020) - Published 20 October, 2020

This work shows that surface friction in hydrogels display similar features as internal friction in other solids, on different scales.

Swarming transitions in hierarchical societies

Tingting Xue, Xu Li, Peter Grassberger, and Li Chen

Phys. Rev. Research 2, 042017(R) (2020) - Published 23 October, 2020

This work studies the impact of social hierarchy on the swarming transitions and reveals a non-monotonic change in the discontinuities in the first-order phase transitions

Single- and two-color attosecond hard x-ray free-electron laser pulses with nonlinear compression

Alexander Malyzhenkov, Yunieski P. Arbelo, Paolo Craievich, Philipp Dijkstal, Eugenio Ferrari, Sven Reiche, Thomas Schietinger, Pavle Juranić, and Eduard Prat

Phys. Rev. Research 2, 042018(R) (2020) - Published 26 October, 2020

This work describes a method for the generation of one and two-color ultra-short X-ray free-electron-laser pulses, based on tailoring the Coulomb interaction between the electrons of a highly compressed beam in the nonlinear regime.

Thermal origin of light emission in nonresonant and resonant nanojunctions

Christian Ott, Stephan Götzinger, and Heiko B. Weber

Phys. Rev. Research 2, 042019(R) (2020) - Published 26 October, 2020

Experiments on graphene nanojunctions reveal light emission with a Planck spectrum. The origin of light emission can thus be traced back to hot electrons in the nanojunction.

Possible superconductivity above 40 K in rhenium-doped strontium ruthenates indicated by Fourier-transform infrared spectroscopy

Yurii Aleshchenko, Boris Gorshunov, Elena Zhukova, Andrey Muratov, Alexander Dudka, Rajendra Dulal, Serafim Teknowijoyo, Sara Chahid, Vahan Nikoghosyan, and Armen Gulian

Phys. Rev. Research 2, 042020(R) (2020) - Published 27 October, 2020

The authors show several experimental indications of superconductivity with the onset above 40 K in multiphase strontium ruthenate doped by rhenium and selenium.

Remarkable simplicity in the prediction of nonspherical particle segregation

Ryan P. Jones, Julio M. Ottino, Paul B. Umbanhowar, and Richard M. Lueptow

Phys. Rev. Research 2, 042021(R) (2020) - Published 28 October, 2020

Flow-driven segregation of non-spherical-particle mixtures can be predicted from the particle volume ratio for a broad range of particle shapes and sizes

Extended Coulomb liquid of paired hardcore boson model on a pyrochlore lattice

Chun-Jiong Huang, Changle Liu, Ziyang Meng, Yue Yu, Youjin Deng, and Gang Chen

Phys. Rev. Research 2, 042022(R) (2020) - Published 30 October, 2020

The authors establish the phase diagram of a paired hardcore boson model on a pyrochlore lattice and finds the U(1) Coulomb liquid is stable with boson pairing interaction.

Charge disproportionation in the spin-liquid candidate κ(ET)2Cu2(CN)3 at 6 K revealed by Cu63 NQR measurements

T. Kobayashi, Q.-P. Ding, H. Taniguchi, K. Satoh, A. Kawamoto, and Y. Furukawa

Phys. Rev. Research 2, 042023(R) (2020) - Published 30 October, 2020

This paper reports the observation of a second-order phase transition at 6 K related to charge disproportionation in the organic spin-liquid candidate using nuclear quadrupole resonance technique that can be sensitive to both spin and charge dynamics.

Interaction-induced topological charge pump

Yoshihito Kuno and Yasuhiro Hatsugai

Phys. Rev. Research 2, 042024(R) (2020) - Published 30 October, 2020

The authors describe the phase boundary of a symmetry protected state in one dimension spanned by two parameters as a topological obstruction for the interacting charge pump associated with the symmetry breaking parameter as the third dimension.

Singularities in Hessian element distributions of amorphous media

Vishnu V. Krishnan, Smarajit Karmakar, and Kabir Ramola

Phys. Rev. Research 2, 042025(R) (2020) - Published 4 November, 2020

The authors study the distribution of Hessian elements of amorphous systems, which contain a preponderance of small elements, characterized by a singularity that depends only on the decay of the interaction potential near the cutoff distance.

Magnetic field-induced vortex triplet and vortex lattice in a liquid crystal cell

Enrique Calisto, Marcel G. Clerc, and Valeska Zambra

Phys. Rev. Research 2, 042026(R) (2020) - Published 10 November, 2020

The authors show the emergence of a vortex triplet and a topological vortex lattice as a consequence of the combined effect of a magnetic ring and the uniform electric field onto a homeotropic nematic liquid crystal.

Anomalous Hall effect in single-band chiral superconductors from impurity superlattices

Yu Li, Zhiqiang Wang, and Wen Huang

Phys. Rev. Research 2, 042027(R) (2020) - Published 12 November, 2020

The authors propose a theory of impurity-induced anomalous Hall effect in chiral superconductors at the one-loop approximation, without resorting to vertex corrections.

Maximal randomness from partially entangled states

Erik Woodhead, Jędrzej Kaniewski, Boris Bourdoncle, Alexia Salavrakos, Joseph Bowles, Antonio Acín, and Remigiusz Augusiak

Phys. Rev. Research 2, 042028(R) (2020) - Published 13 November, 2020

This work investigates how much randomness can be obtained by measuring partially or maximally entangled quantum states in a Bell-type experiment.

Link prediction in multiplex networks via triadic closure

Alberto Aleta, Marta Tuninetti, Daniela Paolotti, Yamir Moreno, and Michele Starnini

Phys. Rev. Research 2, 042029(R) (2020) - Published 16 November, 2020

This paper shows how different kinds of relational data can be exploited to improve the prediction of new links in multi-layer complex systems, from protein interactions to social networks

Thermopower of ionic conductors and ionic capacitors

Alois Würger

Phys. Rev. Research 2, 042030(R) (2020) - Published 19 November, 2020

This paper points out a discrepancy of ionic and electronic Seebeck coefficients, which results from the different conservation laws for ions and electron-hole pairs.

Scaling up the Anderson transition in random-regular graphs

M. Pino

Phys. Rev. Research 2, 042031(R) (2020) - Published 20 November, 2020

The author shows that the scaling of the Anderson transition points to the non-ergodicity of the metal in a disordered random-graph.

Designing nickelate superconductors with d8 configuration exploiting mixed-anion strategy

Naoya Kitamine, Masayuki Ochi, and Kazuhiko Kuroki

Phys. Rev. Research 2, 042032(R) (2020) - Published 20 November, 2020

The authors theoretically design nickelate high Tc superconductors, exploiting mixed anion strategy and discuss relevance of these designed materials to the recently discovered superconductor (Nd,Sr)NiO2.

Chain breaking and Kosterlitz-Thouless scaling at the many-body localization transition in the random-field Heisenberg spin chain

Nicolas Laflorencie, Gabriel Lemarié, and Nicolas Macé

Phys. Rev. Research 2, 042033(R) (2020) - Published 25 November, 2020

The authors show that many-body localization in the random-field Heisenberg chain is accompanied by a spin freezing mechanism, leading to chain breakings.

Deciphering the nature of ion-graphene interaction

Ke Zhou and Zhiping Xu

Phys. Rev. Research 2, 042034(R) (2020) - Published 1 December, 2020

The authors use first-principles calculations to show that the interaction between graphene and metal ions is stronger than van der Waals interaction, and is of a different nature.

Topologically quantized current in quasiperiodic Thouless pumps

Pasquale Marra and Muneto Nitta

Phys. Rev. Research 2, 042035(R) (2020) - Published 2 December, 2020

This work studies the effect of quasiperiodicity on topological Thouless pumps realized by atomic gases in optical lattices, and shows that the pumped current is quantized up to exponentially small corrections.

Labyrinthine patterns transitions

S. Echeverría-Alar and M. G. Clerc

Phys. Rev. Research 2, 042036(R) (2020) - Published 7 December, 2020

The authors show the short range-order of labyrinthine patterns as a single wavenumber behavior, classify different types of labyrinths, and reveal the bifurcations between them.

Mobility edge of the two-dimensional Bose-Hubbard model

Andreas Geißler and Guido Pupillo

Phys. Rev. Research 2, 042037(R) (2020) - Published 8 December, 2020

This work characterizes the near-thermal criticality of the mobility edge for interacting Bosons on a lattice. The authors find full localization in a confined setup as observed in the experiment.

Robustness of topological corner modes in photonic crystals

Matthew Proctor, Paloma Arroyo Huidobro, Barry Bradlyn, María Blanco de Paz, Maia G. Vergniory, Dario Bercioux, and Aitzol García-Etxarri

Phys. Rev. Research 2, 042038(R) (2020) - Published 9 December, 2020

The article analyzes the robustness of corner modes in higher-order topological photonic crystals, concluding that these systems are reducible to a chirally symmetric limit.

Phononic soft mode behavior and a strong electronic background across the structural phase transition in the excitonic insulator Ta2NiSe5

Min-Jae Kim, Armin Schulz, Tomohiro Takayama, Masahiko Isobe, Hidenori Takagi, and Stefan Kaiser

Phys. Rev. Research 2, 042039(R) (2020) - Published 10 December, 2020

The authors study the dynamics driving the semiconductor -excitonic insulator phase transition in Ta2NiSe5 using Raman spectroscopy.

Local polarization in oxygen-deficient LaMnO3 induced by charge localization in the Jahn-Teller distorted structure

Chiara Ricca, Nicolas Niederhauser, and Ulrich Aschauer

Phys. Rev. Research 2, 042040(R) (2020) - Published 10 December, 2020

The authors show how the coupling of the orbital order with the defect chemistry leads to a local polarization in the oxygen-deficient Jahn-Teller distorted material LaMnO₃

Parallel dark-soliton pair in a bistable two-dimensional exciton-polariton superfluid

G. Lerario, S. V. Koniakhin, A. Maître, D. Solnyshkov, A. Zilio, Q. Glorieux, G. Malpuech, E. Giacobino, S. Pigeon, and A. Bramati

Phys. Rev. Research 2, 042041(R) (2020) - Published 11 December, 2020

The authors show the hydrodynamic generation of a stable dark soliton pair in an exciton polariton condensate. Within the optical bistable regime, the soliton pair propagates for tens of microns in the microcavity plane.

Incommensurate two-dimensional checkerboard charge density wave in the low-dimensional superconductor Ta4Pd3Te16

Zhenzhong Shi, S. J. Kuhn, F. Flicker, T. Helm, J. Lee, William Steinhardt, Sachith Dissanayake, D. Graf, J. Ruff, G. Fabbris, D. Haskel, and S. Haravifard

Phys. Rev. Research 2, 042042(R) (2020) - Published 16 December, 2020

The authors discover a weak incommensurate charge density wave state with a mixed character of dimensions in the superconductor Ta4Pd3Te16.

Electromagnetic anapoles of a Cartesian expansion of localized electric currents

Andriy Shevchenko, Vishal Vashistha, Markus Nyman, and Matti Kaivola

Phys. Rev. Research 2, 042043(R) (2020) - Published 18 December, 2020

The authors introduce a family of electromagnetic anapoles and show an application.

Signatures of a degenerate many-body state of interlayer excitons in a van der Waals heterostack

Lukas Sigl, Florian Sigger, Fabian Kronowetter, Jonas Kiemle, Julian Klein, Kenji Watanabe, Takashi Taniguchi, Jonathan J. Finley, Ursula Wurstbauer, and Alexander W. Holleitner

Phys. Rev. Research 2, 042044(R) (2020) - Published 22 December, 2020

The authors report on photogenerated ensembles of interlayer excitons in two-dimensional materials exhibiting distinct signatures in accordance with predicted criticalities of a degenerate many-body ground state, such as a Bose-Einstein condensate.

Knotted polarizations and spin in three-dimensional polychromatic waves

Danica Sugic, Mark R. Dennis, Franco Nori, and Konstantin Y. Bliokh

Phys. Rev. Research 2, 042045(R) (2020) - Published 23 December, 2020

The authors examine complex three-dimensional polarization in the interference of several vector waves with different commensurable frequencies. They describe knots formed by such polychromatic vector fields, as well as their spin and polarization properties.

Giant nonreciprocal magnetotransport in bulk trigonal superconductor PbTaSe2

T. Ideue, S. Koshikawa, H. Namiki, T. Sasagawa, and Y. Iwasa

Phys. Rev. Research 2, 042046(R) (2020) - Published 24 December, 2020

This paper investigates the bulk rectification effect under out-of-plane magnetic field in a noncentrosymmetric three-dimensioanl superconductor PbTaSe2. The authors show a giant enhancement of the nonreciprocal magnetotransport during the superconducting transition and a sign reversal.

Single branch of chiral Majorana modes from doubly degenerate Fermi surfaces

Wang Yang, Chao Xu, and Congjun Wu

Phys. Rev. Research 2, 042047(R) (2020) - Published 24 December, 2020

The authors use a boundary on boundary method to show that a single branch of chiral Majorana mode appears as an intrinsic property of superconductors in the absence of spin-orbit coupling.

Magnetostructural coupling from competing magnetic and chemical bonding effects

Joshua D. Bocarsly, M. D. Johannes, Stephen D. Wilson, and Ram Seshadri

Phys. Rev. Research 2, 042048(R) (2020) - Published 28 December, 2020

The authors find that the magnetostructural coupling in MnAs arises from an orbital-specific competition between exchange energies and kinetic energies, which may give rise to an exotic paramagnetic state.

ARTICLES

When pull turns to shove: A continuous-time model for opinion dynamics

David Sabin-Miller and Daniel M. Abrams

Phys. Rev. Research 2, 043001 (2020) - Published 1 October, 2020

The authors develop a framework for political behavior of a population influenced by a heterogeneous environment in continuous time, incorporating tribalism and repulsion from dissonant ideas.

Free and defect-bound (bi)polarons in LiNbO3: Atomic structure and spectroscopic signatures from ab initio calculations

Falko Schmidt, Agnieszka L. Kozub, Timur Biktagirov, Christof Eigner, Christine Silberhorn, Arno Schindlmayr, Wolf Gero Schmidt, and Uwe Gerstmann

Phys. Rev. Research 2, 043002 (2020) - Published 1 October, 2020

The authors use first-principles calculations and experimental measurements to analyze the formation of electron polarons at intrinsicpoint defects in lithium niobate. They provide structure models forfree, bound, and bipolarons and propose a microscopic explanation forthe observed two-path recombination of bipolarons.

Fine-structure classification of multiqubit entanglement by algebraic geometry

Masoud Gharahi, Stefano Mancini, and Giorgio Ottaviani

Phys. Rev. Research 2, 043003 (2020) - Published 1 October, 2020

The authors use algebraic-geometry tools, secant varieties, and l-multilinear ranks, to present an entanglement classification of generic n-qubit pure states under stochastic local operation and classical communication that is based on a finite number of families and subfamilies.

Optical imprinting of superlattices in two-dimensional materials

Hwanmun Kim, Hossein Dehghani, Hideo Aoki, Ivar Martin, and Mohammad Hafezi

Phys. Rev. Research 2, 043004 (2020) - Published 1 October, 2020

This work proposes an optical method to imprint superlattice structures in two-dimensional electronic systems such as graphene, and shows the applications of this tunability.

Spreading of localized attacks on spatial multiplex networks with a community structure

Dana Vaknin, Bnaya Gross, Sergey V. Buldyrev, and Shlomo Havlin

Phys. Rev. Research 2, 043005 (2020) - Published 1 October, 2020

This work provides a mathematical framework for analyzing the cascading process of realistic multiplex networks, where each layer has a spatial structure of communities.

Assessing the role of initial correlations in the entropy production rate for nonequilibrium harmonic dynamics

Giorgio Zicari, Matteo Brunelli, and Mauro Paternostro

Phys. Rev. Research 2, 043006 (2020) - Published 1 October, 2020

The authors study the relation between correlations, initial preparation of a quantum system, and non- Markovianity by investigating the case of harmonic dynamics.

Techniques to generate intense isolated attosecond pulses from relativistic plasma mirrors

H. Kallala, F. Quéré, and H. Vincenti

Phys. Rev. Research 2, 043007 (2020) - Published 1 October, 2020

This work shows how to obtain terawatt isolated attosecond pulses from relativistic Doppler harmonics produced out of laser-solid interactions at ultra-high light intensities

Superfluid density versus transition temperature in a layered organic superconductor κ(BEDTTTF)2Cu[N(CN)2]Br under pressure

Kodai Wakamatsu, Kazuya Miyagawa, and Kazushi Kanoda

Phys. Rev. Research 2, 043008 (2020) - Published 1 October, 2020

This work studies the pressure dependence of the superfluid density through the magnetization measurements in a layered organic superconductor and finds that the superfluid density is pressure-independent while the transition temperature substantially decreases.

Structure of spin correlations in high-temperature SU(N) quantum magnets

Christian Romen and Andreas M. Läuchli

Phys. Rev. Research 2, 043009 (2020) - Published 1 October, 2020

The authors study the structure of spin correlations in SU(N) quantum magnets and reveal a common structure across many lattices that persist in a large range of temperatures

Transient optical properties of highly excited dielectric materials: Apparent birefringence and delayed reflectivity increase

Søren H. Møller, Sebastian T. Andersen, and Peter Balling

Phys. Rev. Research 2, 043010 (2020) - Published 1 October, 2020

The authors show transient optical properties of fused silica and attribute them to a polarization-dependent absorption channel.

Quantum state discrimination on reconfigurable noise-robust quantum networks

Nicola Dalla Pozza and Filippo Caruso

Phys. Rev. Research 2, 043011 (2020) - Published 2 October, 2020

The authors show that the dynamics of Quantum Stochastic Walks on a Quantum Network, structured as a Neural Network , allow for Noise-robust discrimination of quantum states.

Bulk-and-edge to corner correspondence

Luka Trifunovic

Phys. Rev. Research 2, 043012 (2020) - Published 2 October, 2020

This paper provides an algorithm to compute fractional part of the charge around an arbitrary corner of a terminated crystal: instead of using the eigenstates of the terminated crystal, only bulk and ribbon eigenstates are required

Intrinsic quantum Ising model on a triangular lattice magnet TmMgGaO4

Changle Liu, Chun-Jiong Huang, and Gang Chen

Phys. Rev. Research 2, 043013 (2020) - Published 2 October, 2020

The authors study the Tm-based materials, showing their phase diagram and making predictions for the evolution of the magnetic properties with the external magnetic field.

Oscillating bound states for a giant atom

Lingzhen Guo, Anton Frisk Kockum, Florian Marquardt, and Göran Johansson

Phys. Rev. Research 2, 043014 (2020) - Published 2 October, 2020

The authors show that oscillating bound states in the continuum exist for a non-Markovian giant atom coupled to an infinite waveguide at three or more points The bound state is confined in a finite region of the waveguide and exchanges energy with the giant atom persistently despite the presence of the dissipative environment

Universal thermodynamics in the Kitaev fractional liquid

Han Li, Dai-Wei Qu, Hao-Kai Zhang, Yi-Zhen Jia, Shou-Shu Gong, Yang Qi, and Wei Li

Phys. Rev. Research 2, 043015 (2020) - Published 2 October, 2020

The authors perform finite-temperature simulations of the extended Kitaev model by the recently developed thermal tensor-network approach, and show the onset of a Kitaev fractional liquid with emergent Curie law of magnetic susceptibility.

Thermodynamics of collisional models for Brownian particles: General properties and efficiency

Angel L. L. Stable, C. E. Fernández Noa, William G. C. Oropesa, and C. E. Fiore

Phys. Rev. Research 2, 043016 (2020) - Published 2 October, 2020

Authors introduce the concept of collisional models for Brownian particles, in which the system is sequentially placed in contact with distinct thermal environments and external forces.

Dark matter or correlated errors: Systematics of the AMS-02 antiproton excess

Jan Heisig, Michael Korsmeier, and Martin Wolfgang Winkler

Phys. Rev. Research 2, 043017 (2020) - Published 2 October, 2020

This work investigates correlated uncertainties in the antiproton-carbon absorption cross sections that enter the measurements of cosmic-ray fluxes by the AMS-02 experiment.

Nonconventional magnetic phenomena in neodymium thin film

G. Yumnam, J. Guo, Y. Chen, V. Lauter, and D. K. Singh

Phys. Rev. Research 2, 043018 (2020) - Published 2 October, 2020

The authors study neodymium thin films and observe a cross-over behavior in magnetoresistance, which is ascribed to the field-induced ferromagnetism at low temperature.

Slave-boson description of pseudogap metals in tJ models

Julia Brunkert and Matthias Punk

Phys. Rev. Research 2, 043019 (2020) - Published 2 October, 2020

This work discusses a modified slave-boson representation of the t-J model, which accounts for spinon-holon bound states and gives rise to a metallic pseudogap phase with sharp, Fermi-arc like features in the electron spectral function.

Half-magnetization plateau and the origin of threefold symmetry breaking in an electrically switchable triangular antiferromagnet

Shannon C. Haley, Sophie F. Weber, Tessa Cookmeyer, Daniel E. Parker, Eran Maniv, Nikola Maksimovic, Caolan John, Spencer Doyle, Ariel Maniv, Sanath K. Ramakrishna, Arneil P. Reyes, John Singleton, Joel E. Moore, Jeffrey B. Neaton, and James G. Analytis

Phys. Rev. Research 2, 043020 (2020) - Published 5 October, 2020

This paper reports a plateau in the magnetization of the triangular lattice antiferromagnet Fe1/3NbS2 using Ab initio calculations

Unveiling dipolar spectral regimes of large dielectric Mie spheres from helicity conservation

Jorge Olmos-Trigo, Diego R. Abujetas, Cristina Sanz-Fernández, Xavier Zambrana-Puyalto, Nuno de Sousa, José A. Sánchez-Gil, and Juan José Sáenz

Phys. Rev. Research 2, 043021 (2020) - Published 5 October, 2020

The authors use helicity conservation to show that dipolar behavior is not limited to small particles under plane wave illumination

Hybrid quantum network design against unauthorized secret-key generation, and its memory cost

Omer Sakarya, Marek Winczewski, Adam Rutkowski, and Karol Horodecki

Phys. Rev. Research 2, 043022 (2020) - Published 5 October, 2020

The authors propose a new architecture for quantum networks based on both pure and mixed entangled states, which protects against unauthorized key generation by dishonest end-users

Emergence of nematic paramagnet via quantum order-by-disorder and pseudo-Goldstone modes in Kitaev magnets

Matthias Gohlke, Li Ern Chern, Hae-Young Kee, and Yong Baek Kim

Phys. Rev. Research 2, 043023 (2020) - Published 5 October, 2020

The authors investigate the KΓΓ model in a magnetic field along [111]. Quantum order-by-disorder gives rise to a nematic paramagnetic phase, that breaks lattice-rotational symmetry spontaneously and exhibits a characteristic pseudo-Goldstone mode.

Realizing the Hayden-Preskill protocol with coupled Dicke models

Yanting Cheng, Chang Liu, Jinkang Guo, Yu Chen, Pengfei Zhang, and Hui Zhai

Phys. Rev. Research 2, 043024 (2020) - Published 5 October, 2020

This work uses the Dicke model to demonstrate how to recover initial information through local measurements after the initial information has been scrambled into the entire many-body system

Topological and holonomic quantum computation based on second-order topological superconductors

Song-Bo Zhang, W. B. Rui, Alessio Calzona, Sang-Jun Choi, Andreas P. Schnyder, and Björn Trauzettel

Phys. Rev. Research 2, 043025 (2020) - Published 5 October, 2020

This work presents protocols in different setups formed by second-order topological superconductors to nucleate,exchange, and fuse Majorana zero modes for non-Abelian braiding andholonomic quantum gate operations.

Genome heterogeneity drives the evolution of species

Mattia Miotto and Lorenzo Monacelli

Phys. Rev. Research 2, 043026 (2020) - Published 5 October, 2020

This paper shows how heterogeneity in gene expression is a key-feature for evolution, which prevents extinction occurring due to the accumulation of random detrimental mutations and provides a mechanism for speciations.

Jamming and percolation of dimers in restricted-valence random sequential adsorption

A. P. Furlan, Diogo C. dos Santos, Robert M. Ziff, and Ronald Dickman

Phys. Rev. Research 2, 043027 (2020) - Published 5 October, 2020

This paper studies irreversible deposition of dimers onto bonds of the square and triangular lattices subjected to valence restrictions and explore how this restriction affects jamming densities and percolation thresholds.

Poisson Kalman filter for disease surveillance

Donald Ebeigbe, Tyrus Berry, Steven J. Schiff, and Timothy Sauer

Phys. Rev. Research 2, 043028 (2020) - Published 6 October, 2020

The authors develop a Poisson Kalman filter and apply to the problem of neonatal infections, and postinfectious hydrocephalus disease

Higgs-mode resonance in third harmonic generation in NbN superconductors: Multiband electron-phonon coupling, impurity scattering, and polarization-angle dependence

Naoto Tsuji and Yusuke Nomura

Phys. Rev. Research 2, 043029 (2020) - Published 6 October, 2020

This paper analyzes the resonance of the terahertz third harmonic generation in a multiband disordered superconductor NbN based on first-principles electron-phonon calculations, and shows that the leading contribution for the resonance comes from the Higgs amplitude mode with no polarization-angle dependence in the dirty regime.

Spectral damping without quasiparticle decay: The dynamic structure factor of two-dimensional quantum Heisenberg antiferromagnets

Matthew C. O'Brien and Oleg P. Sushkov

Phys. Rev. Research 2, 043030 (2020) - Published 6 October, 2020

The authors show the creation of a classical radiation field containing infinitely-many long wavelength quasiparticles, in addition to several conventional excitations, using an experimental probe incident on a quantum system.

Visualizing dissipative charge-carrier dynamics at the nanoscale with superconducting-charge-qubit microscopy

Berthold Jäck

Phys. Rev. Research 2, 043031 (2020) - Published 6 October, 2020

The author proposes scanning charge qubit microscopy as a way to visualize dissipative charge carrier dynamics in low-dimensional quantum materials.

Intrinsic sign problem in fermionic and bosonic chiral topological matter

Omri Golan, Adam Smith, and Zohar Ringel

Phys. Rev. Research 2, 043032 (2020) - Published 6 October, 2020

This work demonstrates that the physics of most chiral topological phases of matter poses an obstruction to sign-problem-free quantum Monte Carlo simulations.

Absolute anomalies in (2+1)D symmetry-enriched topological states and exact (3+1)D constructions

Daniel Bulmash and Maissam Barkeshli

Phys. Rev. Research 2, 043033 (2020) - Published 6 October, 2020

This paper constructs an exactly solvable path integral and Hamiltonian for a (3+1)-dimensional symmetry protected topological phase hosting the given symmetry-enriched topological phase at its surface.

Speck of chaos

Lea F. Santos, Francisco Pérez-Bernal, and E. Jonathan Torres-Herrera

Phys. Rev. Research 2, 043034 (2020) - Published 7 October, 2020

This work shows that a single defect site brings integrable spin-1/2 and spin-1 models to the chaotic domain. The correlation hole and the off-diagonal elements of observables detect this transition despite the presence of symmetries.

Phono-magnetic analogs to opto-magnetic effects

Dominik M. Juraschek, Prineha Narang, and Nicola A. Spaldin

Phys. Rev. Research 2, 043035 (2020) - Published 7 October, 2020

The authors develop a theoretical framework for the interactions of coherent phonons with magnetic order that predicts phonon analogues of the inverse Faraday and inverse Cotton-Mouton effects

Nonlinear entanglement growth in inhomogeneous space-times

Arkadiusz Kosior and Markus Heyl

Phys. Rev. Research 2, 043036 (2020) - Published 7 October, 2020

The authors study entanglement growth in inhomogeneous spacetimes, with a particular focus on a Rindler spacetime, where correlations do not propagate within straight light cones, and find that the entanglement entropy grows sublinearly and is asymptotically constant in a long-time limit.

Infrared attosecond field transients and UV to IR few-femtosecond pulses generated by high-energy soliton self-compression

Christian Brahms, Federico Belli, and John C. Travers

Phys. Rev. Research 2, 043037 (2020) - Published 7 October, 2020

The authors use soliton self-compression of high-energy laser pulses in gas-filled hollow capillary fibers to generate infrared sub-femtosecond field transients as well as tunable few-femtosecond pulses from the ultraviolet to the near infrared

Synchronizing an oscillatory medium: The speed of pacemaker-generated waves

Jan Rombouts and Lendert Gelens

Phys. Rev. Research 2, 043038 (2020) - Published 7 October, 2020

The authors use numerical simulation to study the properties of waves in oscillatory media sent out by a pacemaker. By comparing different oscillator types and pacemaker properties, they quantify which factors determine the speed of these waves, which are often used by biological systems to transmit information and synchronize processes.

Reanalysis of the binary neutron star mergers GW170817 and GW190425 using numerical-relativity calibrated waveform models

Tatsuya Narikawa, Nami Uchikata, Kyohei Kawaguchi, Kenta Kiuchi, Koutarou Kyutoku, Masaru Shibata, and Hideyuki Tagoshi

Phys. Rev. Research 2, 043039 (2020) - Published 7 October, 2020

This work investigates weak dependence on gravitational waveform models in the extraction of information about neutron stars.

Bottom-to-top decomposition of time series by smoothness-controlled cubic splines: Uncovering distinct freezing-melting dynamics between the Arctic and the Antarctic

Imre M. Jánosi, Ágnes Baki, Marcus W. Beims, and Jason A. C. Gallas

Phys. Rev. Research 2, 043040 (2020) - Published 7 October, 2020

The paper provides a method to decompose noisy, non-stationary, complex signals and apply it to 40 years of daily sea ice extent data.

Graphene as a nanoelectromechanical reference piezoresistor

Abhinaba Sinha, Abhishek Sharma, Pankaj Priyadarshi, Ashwin Tulapurkar, and Bhaskaran Muralidharan

Phys. Rev. Research 2, 043041 (2020) - Published 8 October, 2020

The authors discover strain insensitive transport angles in the ballistic and diffusive transport regimes of graphene and propose to use this effect as a reference piezoresistor.

Entanglement and complexity of interacting qubits subject to asymmetric noise

E. Kapit, P. Roushan, C. Neill, S. Boixo, and V. Smelyanskiy

Phys. Rev. Research 2, 043042 (2020) - Published 8 October, 2020

This paper shows that a chain of coupled qubits, interacting strongly with extremely noisy resonators, can still display all the hallmarks of significant quantum complexity and pose an intractable simulation problem for supercomputers.

Fractionalization and anomalies in symmetry-enriched U(1) gauge theories

Shang-Qiang Ning, Liujun Zou, and Meng Cheng

Phys. Rev. Research 2, 043043 (2020) - Published 8 October, 2020

The structure of symmetries and anomalies of a (3+1)d U(1) gauge theory is characterized and classified.

Relative anomaly in (1+1)d rational conformal field theory

Meng Cheng and Dominic J. Williamson

Phys. Rev. Research 2, 043044 (2020) - Published 8 October, 2020

The authors derive a formula to compute relative ’t Hooft anomaly to characterize symmetry-enriched topological phases

Topological semimetal phase with exceptional points in one-dimensional non-Hermitian systems

Kazuki Yokomizo and Shuichi Murakami

Phys. Rev. Research 2, 043045 (2020) - Published 8 October, 2020

The authors show that in the non-Hermitian Su-Schrieffer-Heeger model, a topological semimetal phase with exceptional points is stabilized due to deformations of the generalized Brillouin zone. Each energy band is divided into three regions by cusps and exceptional points on the generalized Brillouin zone.

Phase transitions and generalized biorthogonal polarization in non-Hermitian systems

Elisabet Edvardsson, Flore K. Kunst, Tsuneya Yoshida, and Emil J. Bergholtz

Phys. Rev. Research 2, 043046 (2020) - Published 8 October, 2020

The authors develop a microscopic theory of the bulk-boundary correspondence and phase transitions in open non-Hermitian systems using a generalized biorthogonal polarization.

Lieb-Robinson bounds and out-of-time order correlators in a long-range spin chain

Luis Colmenarez and David J. Luitz

Phys. Rev. Research 2, 043047 (2020) - Published 8 October, 2020

The authors analyze the spreading of information in a spin chain with long-range interactions and find new speed limits for quantum information scrambling based on numerical computations

Collective photon routing improvement in a dissipative quantum emitter chain strongly coupled to a chiral waveguide QED ladder

Bibandhan Poudyal and Imran M. Mirza

Phys. Rev. Research 2, 043048 (2020) - Published 8 October, 2020

This work shows that collective effects arising due to infinitely long-ranged dipole-dipole interaction among thirty quantum emitters can protect the routing of single photons from spontaneous emission loss in a chiral waveguide quantum electrodynamics ladder.

Traversable wormhole and Hawking-Page transition in coupled complex SYK models

Sharmistha Sahoo, Étienne Lantagne-Hurtubise, Stephan Plugge, and Marcel Franz

Phys. Rev. Research 2, 043049 (2020) - Published 8 October, 2020

The authors study the coupling of two SYK models with U(1) symmetry and show the onset of various phases with holographic duals

Interplay between coherent and dissipative dynamics of bosonic doublons in an optical lattice

M. J. Mark, S. Flannigan, F. Meinert, J. P. D'Incao, A. J. Daley, and H.-C. Nägerl

Phys. Rev. Research 2, 043050 (2020) - Published 8 October, 2020

This work investigates the interplay between coherent and dissipative dynamics by observing loss of bosonic doublons in the presence of strong three-body decay rates. The authors find that only a non-trivial combination of a beyond standard Bose-Hubbard lattice model and modified on-site three-atom dynamics explain the experimental findings.

Thermalization of photoexcited carriers in two-dimensional transition metal dichalcogenides and internal quantum efficiency of van der Waals heterostructures

Dinesh Yadav, Maxim Trushin, and Fabian Pauly

Phys. Rev. Research 2, 043051 (2020) - Published 9 October, 2020

This work studies the effect of spin-orbit coupling on the hot carrier relaxation in single-layer MoS2 and WSe2, resolving the influence of optical and acoustical phonons. Additionally, it reveals that the internal quantum efficiency in WSe2-based tunneling devices should be higher than in MoS2-based systems.

Renormalized Lindblad driving: A numerically exact nonequilibrium quantum impurity solver

Matan Lotem, Andreas Weichselbaum, Jan von Delft, and Moshe Goldstein

Phys. Rev. Research 2, 043052 (2020) - Published 9 October, 2020

This work introduces a tensor-network algorithm for nonequilibrium quantum impurities coupled to finite leads which in turn are weakly coupled to Lindblad reservoirs, to allow for a nonequilibrium steady state while capturing many-body correlations as in the equilibrium numerical renormalization group

Using spatial patterns of English folk speech to infer the universality class of linguistic copying

James Burridge and Tamsin Blaxter

Phys. Rev. Research 2, 043053 (2020) - Published 14 October, 2020

English dialect maps are used to infer how linguistic features are copied. Copying driven by conformity, generating surface tension, appears more likely than proportional copying, which creates patterns driven by noise

Five-dimensional cooling and nonlinear dynamics of an optically levitated nanodumbbell

Jaehoon Bang, T. Seberson, Peng Ju, Jonghoon Ahn, Zhujing Xu, Xingyu Gao, F. Robicheaux, and Tongcang Li

Phys. Rev. Research 2, 043054 (2020) - Published 9 October, 2020

This paper reports five-dimensional cooling and the nonlinear dynamics of a levitated nanoparticle in a vacuum. Three center-of-mass motion modes and two torsional vibration modes of a levitated nanodumbbell in a linearly polarized laser are cooled simultaneously.

Energy and entropy: Path from game theory to statistical mechanics

S. G. Babajanyan, A. E. Allahverdyan, and Kang Hao Cheong

Phys. Rev. Research 2, 043055 (2020) - Published 9 October, 2020

The authors show how a bargaining game between energy and entropy builds up statistical mechanics.

Photoelectron and fragmentation dynamics of the H++H+ dissociative channel in NH3 following direct single-photon double ionization

Kirk A. Larsen, Thomas N. Rescigno, Travis Severt, Zachary L. Streeter, Wael Iskandar, Saijoscha Heck, Averell Gatton, Elio G. Champenois, Richard Strom, Bethany Jochim, Dylan Reedy, Demitri Call, Robert Moshammer, Reinhard Dörner, Allen L. Landers, Joshua B. Williams, C. William McCurdy, Robert R. Lucchese, Itzik Ben-Itzhak, Daniel S. Slaughter, and Thorsten Weber

Phys. Rev. Research 2, 043056 (2020) - Published 9 October, 2020

This paper presents a state-selective analysis on the photoionization mechanisms and fragmentation dynamics of the H+ + H+ dissociation channel in NH3 upon direct single-photon double ionization.

Scattering-induced and highly tunable by gate damping-like spin-orbit torque in graphene doubly proximitized by two-dimensional magnet Cr2Ge2Te6 and monolayer WS2

Klaus Zollner, Marko D. Petrović, Kapildeb Dolui, Petr Plecháč, Branislav K. Nikolić, and Jaroslav Fabian

Phys. Rev. Research 2, 043057 (2020) - Published 9 October, 2020

The authors design in silico a graphene-based van der Waals heterostructure where purely two-dimensional electronic transport generates nonequilibrium spin density in all spatial directions, due to scattering of impurities or potential barriers.

Generalized theory of pseudomodes for exact descriptions of non-Markovian quantum processes

Graeme Pleasance, Barry M. Garraway, and Francesco Petruccione

Phys. Rev. Research 2, 043058 (2020) - Published 12 October, 2020

The authors provide a framework for mapping a non-Markovian open quantum system onto a Markovian one using the idea of pseudomodes.

Non-normality and non-monotonic dynamics in complex reaction networks

Zachary G. Nicolaou, Takashi Nishikawa, Schuyler B. Nicholson, Jason R. Green, and Adilson E. Motter

Phys. Rev. Research 2, 043059 (2020) - Published 12 October, 2020

The authors characterize the nonlinear dynamics of complex chemical reaction networks using a master equation approach and show that both normal and non-normal systems can exhibit non-monotonic dynamics while only non-normality can lead to non-monotonic Rényi entropy.

Collinear orbital antiferromagnetic order and magnetoelectricity in quasi-two-dimensional itinerant-electron paramagnets, ferromagnets, and antiferromagnets

R. Winkler and U. Zülicke

Phys. Rev. Research 2, 043060 (2020) - Published 12 October, 2020

The authors study the magnetoelectric effect in semiconductor quantum wells, linking its microscopic origin to the manipulation of orbital antiferromagnetic order of the confined charge carriers.

Spherical-harmonic tensors

Francisco Gonzalez Ledesma and Matthew Mewes

Phys. Rev. Research 2, 043061 (2020) - Published 12 October, 2020

The authors construct a tensor representation of scalar and spin-weighted spherical harmonics, that enables an algebraic spherical decomposition of scalar- and tensor-valued functions.

Measure of qubit-environment entanglement for pure dephasing evolutions

Katarzyna Roszak

Phys. Rev. Research 2, 043062 (2020) - Published 12 October, 2020

The author proposes a qubit-environment entanglement measure that lead to pure dephasing of the qubit.

Stability of heterogeneous parallel-bond adhesion clusters under load

Anil K. Dasanna, Gerhard Gompper, and Dmitry A. Fedosov

Phys. Rev. Research 2, 043063 (2020) - Published 12 October, 2020

The paper proposes a model to identify optimal cluster stability in heterogeneous adhesion and shows that cluster rupture proceeds as a multistep discrete process, in which one of the bond sub-populations ruptures first, followed by the others.

High-resolution movies of molecular rotational dynamics captured with ultrafast electron diffraction

Yanwei Xiong, Kyle J. Wilkin, and Martin Centurion

Phys. Rev. Research 2, 043064 (2020) - Published 12 October, 2020

This work uses ultrafast electron diffraction to capture a movie of a rotational wavepacket in nitrogen molecules that were impulsively aligned by a femtosecond laser pulse.

Acoustic analog of Hawking radiation in quantized circular superflows of Bose-Einstein condensates

Igor Yatsuta, Boris Malomed, and Alexander Yakimenko

Phys. Rev. Research 2, 043065 (2020) - Published 12 October, 2020

The paper reveals that emulation of the black-hole environment in a ring-shaped BEC with non-uniform local sound speed suppresses instabilities in the supersonic region, by a smooth gradient at the white-hole horizon. Further, no Hawking-radiation is generated if the ring’s radius falls below a critical value

Grüneisen parameters: Origin, identity, and quantum refrigeration

Yi-Cong Yu, Shizhong Zhang, and Xi-Wen Guan

Phys. Rev. Research 2, 043066 (2020) - Published 13 October, 2020

This paper generalizes the concept of Gruneisen parameter to include the response of the system to interaction modulation and establishes an identity relating various Gruneisen parameters for a dilute quantum gas.

Phase dynamics of delay-coupled quasi-cycles with application to brain rhythms

Arthur S. Powanwe and André Longtin

Phys. Rev. Research 2, 043067 (2020) - Published 13 October, 2020

The authors show that neural networks exhibiting noise-induced rhythms, also known as quasi-cycle oscillations, can synchronize through out-of-phase locking depending on the noise intensity and the size of the coupling delay

Realization of the tradeoff between internal and external entanglement

Jie Zhu, Meng-Jun Hu, Yue Dai, Yan-Kui Bai, S. Camalet, Chengjie Zhang, Chuan-Feng Li, Guang-Can Guo, and Yong-Sheng Zhang

Phys. Rev. Research 2, 043068 (2020) - Published 13 October, 2020

This paper experimentally presents the tradeoff relation between the internal and external entanglement in the photonic system where the different degrees of freedom of twin photons are used.

Tractable nonlinear memory functions as a tool to capture and explain dynamical behaviors

Edgar Herrera-Delgado, James Briscoe, and Peter Sollich

Phys. Rev. Research 2, 043069 (2020) - Published 13 October, 2020

The authors develop a method for dimensionality reduction of generic nonlinear dynamical systems using Zwanzig-Mori memory functions, and apply it to biological examples.

Collisional picture of quantum optics with giant emitters

Dario Cilluffo, Angelo Carollo, Salvatore Lorenzo, Jonathan A. Gross, G. Massimo Palma, and Francesco Ciccarello

Phys. Rev. Research 2, 043070 (2020) - Published 13 October, 2020

The paper presents a collision-model description of quantumoptics for an arbitrary configuration of many emitters.

Topological phase transition and nontrivial thermal Hall signatures in honeycomb lattice magnets

Yonghao Gao, Xu-Ping Yao, and Gang Chen

Phys. Rev. Research 2, 043071 (2020) - Published 14 October, 2020

This work investigates the topological phase transition driven by the interplay between long-ranged magnetic order and fractionalized spinons, as well as Zeeman coupling, in honeycomb lattice magnets, and shows the onset of a thermal Hall signature near the quantum critical point due to the proximity effect.

Measurement-induced entanglement transitions in many-body localized systems

Oliver Lunt and Arijeet Pal

Phys. Rev. Research 2, 043072 (2020) - Published 14 October, 2020

The authors show that many-body localized systems can have a volume-law which is stable against measurements, but only for certain measurement bases, and explain it on the basis of an an interplay between the measurements and the system’s integrals of motion.

Marching on a rugged landscape: Universality in disordered asymmetric exclusion processes

Astik Haldar and Abhik Basu

Phys. Rev. Research 2, 043073 (2020) - Published 14 October, 2020

This work explores the interplay between quenched disorders and nonequilibrium drive that determines the emerging universal scaling behavior in a number conserving one-dimensional driven diffusive model with exclusion.

Theory for self-bound states of dipolar Bose-Einstein condensates

Yuqi Wang, Longfei Guo, Su Yi, and Tao Shi

Phys. Rev. Research 2, 043074 (2020) - Published 14 October, 2020

The authors propose a Gaussian-based theory to study dipolar droplets that reveals the onset of liquid-gas phase transition as well as showing the emergence of a self-bound gas-phase dominated by the squeezed condensate.

Emergent PT symmetry in a double-quantum-dot circuit QED setup

Archak Purkayastha, Manas Kulkarni, and Yogesh N. Joglekar

Phys. Rev. Research 2, 043075 (2020) - Published 14 October, 2020

The authors show that an on-chip realization of a PT-symmetric quantum device is possible within current experimental parameters by combining various state-of-the-art components of semiconductor-superconductor circuit QED architecture.

Ozone depletion-induced climate change following a 50 pc supernova

Brian C. Thomas and Cody L. Ratterman

Phys. Rev. Research 2, 043076 (2020) - Published 14 October, 2020

The authors explore the influence of a supernova explosion at about 50 parsecs and find that it would trigger a small increase in global average temperature, with minor changes in atmospheric transport and precipitation patterns.

Quantum valence bond ice theory for proton-driven quantum spin-dipole liquids

Masahiko G. Yamada and Yasuhiro Tada

Phys. Rev. Research 2, 043077 (2020) - Published 14 October, 2020

This paper discusses a hybrid quantum liquid state in hydrogen-bonded strongly correlated electron systems.

Bifractal nature of chromosome contact maps

Simone Pigolotti, Mogens H. Jensen, Yinxiu Zhan, and Guido Tiana

Phys. Rev. Research 2, 043078 (2020) - Published 15 October, 2020

This paper shows that chromosome contact maps are characterized by two distinct fractal dimensions

Majorana representation of adiabatic and superadiabatic processes in three-level systems

Shruti Dogra, Antti Vepsäläinen, and G. S. Paraoanu

Phys. Rev. Research 2, 043079 (2020) - Published 15 October, 2020

This work explores the two-star Majorana representation of adiabatic and superadiabatic stimulated Raman passage in a three-level system. The authors derive the counteradiabatic Hamiltonian and provide a generalization of this geometrical picture to mixed states.

Mixing periodic topographies and structural patterns on silicon surfaces mediated by ultrafast photoexcited charge carriers

Jean-Philippe Colombier, Anton Rudenko, Elena Silaeva, Hao Zhang, Xxx Sedao, Emile Bévillon, Stéphanie Reynaud, Claire Maurice, Florent Pigeon, Florence Garrelie, and Razvan Stoian

Phys. Rev. Research 2, 043080 (2020) - Published 15 October, 2020

This work uses a three-dimensional mesoscopic vision and time-dynamics evolution to study silicon under ultrafast laser irradiation conditions, and shows how the crystal lattice is destabilized and turns periodically into an amorphous state.

Nonlinear electric transport in odd-parity magnetic multipole systems: Application to Mn-based compounds

Hikaru Watanabe and Youichi Yanase

Phys. Rev. Research 2, 043081 (2020) - Published 15 October, 2020

The authors investigate the nonlinear electric transport phenomena in the parity-violating magnets, namely odd-parity magnetic multipole systems. The nonlinear responses in the presence/absence of the magnetic field arise from the spin-orbit-coupled electronic structure of locally-noncentrosymmetric crystals.

Proton-transfer dynamics in ionized water chains using real-time time-dependent density functional theory

Vidushi Sharma and Marivi Fernández-Serra

Phys. Rev. Research 2, 043082 (2020) - Published 15 October, 2020

The authors investigate nonadiabatic proton-transfer dynamics in ionized hydrogen-bonded water clusters, describe its connection to hole-localization, and show that the proton transfer probability increases with the length of the hydrogen-bonded chain.

Numerical time-of-flight analysis of the strong-field photoeffect

V. A. Tulsky and D. Bauer

Phys. Rev. Research 2, 043083 (2020) - Published 15 October, 2020

The authors introduce a method to resolve in time the formation of strong-laser-induced photoelectron spectra straight from the numerical solution to the time-dependent Schrödinger equation.

Spectral theory of fluctuations in time-average statistical mechanics of reversible and driven systems

Alessio Lapolla, David Hartich, and Aljaž Godec

Phys. Rev. Research 2, 043084 (2020) - Published 15 October, 2020

The authors develop a theory to compute the statistical properties of time-average observables and find a bound on fluctuations of time-averages from the emergence of the central limit theorem.

Surface conductivity in antiferromagnetic semiconductor CrSb2

Qianheng Du, Huixia Fu, Junzhang Ma, A. Chikina, M. Radovic, Binghai Yan, and C. Petrovic

Phys. Rev. Research 2, 043085 (2020) - Published 16 October, 2020

The authors report on surface conductivity in antiferromagnetic semiconductor CrSb2 by using electronic transport, angular resolved photoemission and first-principle calculations methods. Whereas both experiment and theory point to enhanced surface conduction similar to topological insulators, surface states are trivial since CrSb2 exhibits no band inversion.

Algebraic higher symmetry and categorical symmetry: A holographic and entanglement view of symmetry

Liang Kong, Tian Lan, Xiao-Gang Wen, Zhi-Hao Zhang, and Hao Zheng

Phys. Rev. Research 2, 043086 (2020) - Published 15 October, 2020

This paper uncovers an algebraic higher symmetry beyond higher group.

Emergence of a thermal equilibrium in a subsystem of a pure ground state by quantum entanglement

Kazuhiro Seki and Seiji Yunoki

Phys. Rev. Research 2, 043087 (2020) - Published 16 October, 2020

The authors show that the temperature of a thermal state emerging in a subsystem of a pure ground state can be determined by the entanglement entropy and subsystem energy of the ground state

Regularized Boltzmann-Gibbs statistics for a Brownian particle in a nonconfining field

Lucianno Defaveri, Celia Anteneodo, David A. Kessler, and Eli Barkai

Phys. Rev. Research 2, 043088 (2020) - Published 16 October, 2020

The paper shows how the thermal canonical equilibrium of Brownian particles in a deep potential trap is violated since the partition function diverges, and proposes a regularization procedure of Boltzmann-Gibbs statistics to solve the problem.

Intracycle interference in the interaction of laser and electron beams

Yuya Morimoto and Peter Hommelhoff

Phys. Rev. Research 2, 043089 (2020) - Published 16 October, 2020

The authors report quantum mechanical interference in the interaction between an ultrashort laser pulse and an electron beam occurring within a cycle of the optical field.

Anomalous Hall effect triggered by pressure-induced magnetic phase transition in α-Mn

Kazuto Akiba, Kaisei Iwamoto, Takaaki Sato, Shingo Araki, and Tatsuo C. Kobayashi

Phys. Rev. Research 2, 043090 (2020) - Published 16 October, 2020

This work reports on a large anomalous Hall effect associated with the Berry curvature in the pressure-induced weak ferromagnetic phase of α-Mn

Phase-tunable thermoelectricity in a Josephson junction

G. Marchegiani, A. Braggio, and F. Giazotto

Phys. Rev. Research 2, 043091 (2020) - Published 16 October, 2020

The authors discuss the nonlinear thermoelectric features of a thermally biased superconducting quantum interference device, where the magnetic flux is used to control the quantum mechanical phase. In the setup considered, both the mean value and the frequency of the oscillatory component of the thermoelectric signal can be externally tuned

Influence of a planar metal nanoparticle assembly on the optical response of a quantum emitter

Harini Hapuarachchi and Jared H. Cole

Phys. Rev. Research 2, 043092 (2020) - Published 16 October, 2020

This paper presents an analytical framework to study how a planar assembly of spherical metal nanoparticles influences the response of a quantum emitter under coherent illumination

Continuous quantum error detection and suppression with pairwise local interactions

Yi-Hsiang Chen and Todd A. Brun

Phys. Rev. Research 2, 043093 (2020) - Published 16 October, 2020

The authors study a continuous measurement scheme for the four qubit Bacon-Shot code, which can store a single qubit in four physical qubits, and show that it can both detect and suppress quantum errors.

Fingerprints of Kitaev physics in the magnetic excitations of honeycomb iridates

A. Revelli, M. Moretti Sala, G. Monaco, C. Hickey, P. Becker, F. Freund, A. Jesche, P. Gegenwart, T. Eschmann, F. L. Buessen, S. Trebst, P. H. M. van Loosdrecht, J. van den Brink, and M. Grüninger

Phys. Rev. Research 2, 043094 (2020) - Published 16 October, 2020

The authors report on a proximate Kitaev spin liquid regime in two different honeycomb iridates in a broad temperature and energy range. The common phenomenology with α-RuCl3 defines what constitutes a “Kitaev material” beyond the existence of a dominant bond-directional exchange.

Wormholes and the thermodynamic arrow of time

Zhuo-Yu Xian and Long Zhao

Phys. Rev. Research 2, 043095 (2020) - Published 19 October, 2020

The authors study the energy transfer between two black holes connected by a wormhole and find an anomalous heat flow via the wormhole, which transfers the heat from the colder black hole to the hotter black hole

Measuring precession in asymmetric compact binaries

Geraint Pratten, Patricia Schmidt, Riccardo Buscicchio, and Lucy M. Thomas

Phys. Rev. Research 2, 043096 (2020) - Published 19 October, 2020

This paper uses Bayesian model selection to determine suitable binary black holes for spin misalignment measurements, even in the presence of waveform systematics.

Emerging criticality at bifurcation points in heteroclinic dynamics

Maximilian Voit and Hildegard Meyer-Ortmanns

Phys. Rev. Research 2, 043097 (2020) - Published 19 October, 2020

This work studies the dynamics that emerges at the bifurcation points between different dynamical regimes in heteroclinic dynamics and show the onset of criticality in those regimes.

Nuts and bolts of supersymmetry

Nitin Upadhyaya, Bryan G. Chen, and Vincenzo Vitelli

Phys. Rev. Research 2, 043098 (2020) - Published 19 October, 2020

This article describes a class of nonlinear topological mechanical systems whose continuum elasticity displays connections with the supersymmetric field theory introduced by Witten and Olive.

Phase diagram of a flexible two-dimensional material

D. R. Saykin, V. Yu. Kachorovskii, and I. S. Burmistrov

Phys. Rev. Research 2, 043099 (2020) - Published 19 October, 2020

The authors construct the phase diagram of a flexible two-dimensional material with a quenched short-range disorder. The phase diagram has four phases with different elastic and transport properties at finite temperatures.

Magnetic structures, spin-flop transition, and coupling of Eu and Mn magnetism in the Dirac semimetal EuMnBi2

Fengfeng Zhu, Xiao Wang, Martin Meven, Junda Song, Thomas Mueller, Changjiang Yi, Wenhai Ji, Youguo Shi, Jie Ma, Karin Schmalzl, Wolfgang F. Schmidt, Yixi Su, and Thomas Brückel

Phys. Rev. Research 2, 043100 (2020) - Published 19 October, 2020

This paper presents a neutron scattering study of the magnetic structures and field-induced spin-flop transition in two-dimensional antiferromagnetic Dirac semimetal EuMnBi2 to reveal the interplay between multiple magnetic degrees of freedom and Dirac fermions.

Fragility of spectral clustering for networks with an overlapping structure

Chihiro Noguchi and Tatsuro Kawamoto

Phys. Rev. Research 2, 043101 (2020) - Published 19 October, 2020

This paper investigates the performance deterioration on spectral clustering owing to overlapping structures in graphs.

Koopman–von Neumann approach to quantum simulation of nonlinear classical dynamics

Ilon Joseph

Phys. Rev. Research 2, 043102 (2020) - Published 19 October, 2020

This paper shows how to use quantum computers to simulate nonlinear and non-Hamiltonian classical dynamics by using the Koopman-von Neumann approach, which reformulates the classical system as an equivalent Schrodinger equation with a Hermitian Hamiltonian and a unitary evolution operator on phase space.

Ultimate squeezing through coherent quantum feedback

Alfred Harwood and Alessio Serafini

Phys. Rev. Research 2, 043103 (2020) - Published 20 October, 2020

The authors develop a framework to describe Gaussian coherent feedback and apply to a bosonic mode subjected to a rotating wave coupling to show that there is no combination of passive feedback loops and quadratic Hamiltonian which can beat the 3dB limit.

Density profile of a semi-infinite one-dimensional Bose gas and bound states of the impurity

Aleksandra Petković, Benjamin Reichert, and Zoran Ristivojevic

Phys. Rev. Research 2, 043104 (2020) - Published 20 October, 2020

The authors study the density profile in a semi-infinite one-dimensional Bose gas and solve the problem of the bound states of a quantum impurity immersed in the system.

GW study of pressure-induced topological insulator transition in group-IV tellurides

Pablo Aguado-Puente, Stephen Fahy, and Myrta Grüning

Phys. Rev. Research 2, 043105 (2020) - Published 20 October, 2020

This work investigates the topological insulator transition under pressure in PbTe, SnTe and GeTe using the G0W0 method, including corrections from the off-diagonal elements of the self-energy.

Criteria for nonclassicality in the prepare-and-measure scenario

Davide Poderini, Samuraí Brito, Ranieri Nery, Fabio Sciarrino, and Rafael Chaves

Phys. Rev. Research 2, 043106 (2020) - Published 20 October, 2020

The authors derive a criteria to ascertain whether a quantum resource can lead to nonclassical behavior in a prepare and measure scenario, and use this result to show how nonclassicality can be activated by increasing the number of preparations or measurements

Dark states of quantum search cause imperfect detection

Felix Thiel, Itay Mualem, Dror Meidan, Eli Barkai, and David A. Kessler

Phys. Rev. Research 2, 043107 (2020) - Published 20 October, 2020

The authors identify certain dark initial states in quantum systems and provide a a formula for their detection probability.

Phase transitions and correlations in fracture processes where disorder and stress compete

Santanu Sinha, Subhadeep Roy, and Alex Hansen

Phys. Rev. Research 2, 043108 (2020) - Published 20 October, 2020

This study shows a phase transition from nonlocalized to localized fracture when tuning the disorder in the fiber bundle model. The transition is first order or second order depending on how the disorder is tuned.

Theory of intrinsic propagation losses in topological edge states of planar photonic crystals

Erik Sauer, Juan Pablo Vasco, and Stephen Hughes

Phys. Rev. Research 2, 043109 (2020) - Published 20 October, 2020

This work uses a guided-mode expansion technique to analyze the band structure and intrinsic propagation losses of four types of topological photonic crystal slab waveguides.

From magnetoelectric response to optical activity

Perry T. Mahon and J. E. Sipe

Phys. Rev. Research 2, 043110 (2020) - Published 21 October, 2020

The authors implement a microscopic theory of polarization and magnetization to study the effects of non-static and non-uniform electromagnetic fields in crystalline systems. The paper presents the linear response tensors associated with the electronic multipole moments and their description of optical activity and other magneto-optical phenomena

Applicability evaluation of the stress-optic law in Newtonian fluids toward stress field measurements

Daisuke Noto, Yuji Tasaka, Jumpei Hitomi, and Yuichi Murai

Phys. Rev. Research 2, 043111 (2020) - Published 21 October, 2020

This work studies the stress-optic law for the flow-induced birefringence that appears in shear flows of a Newtonian fluid, containing tiny flake-structured particles which align in the local shear directions.

Mapping rules from nodal line semimetal to topological crystalline insulator in face centered cubic lattice

Ikuma Tateishi

Phys. Rev. Research 2, 043112 (2020) - Published 21 October, 2020

The author finds an intrinsic link between nodal line semimetals without spin-orbit coupling and topological crystalline insulators, and show a mapping rule from nodal line configurations to the mirror Chern numbers.

Link prediction with hyperbolic geometry

Maksim Kitsak, Ivan Voitalov, and Dmitri Krioukov

Phys. Rev. Research 2, 043113 (2020) - Published 21 October, 2020

The paper finds that the accuracy of link prediction in networks using latent hyperbolic geometry depends on how accurately coordinates of nodes in this geometry are inferred, and develops a hyperbolic coordinate inference method for network embedding.

Exact ground states of quantum many-body systems under confinement

Adolfo del Campo

Phys. Rev. Research 2, 043114 (2020) - Published 21 October, 2020

This work shows the complete family of one-dimensional quantum many-body systems in which the ground state is a product of pair correlation functions both in free space and with a trapping potential.

Connections between nonrotating, slowly rotating, and rapidly rotating turbulent convection transport scalings

Jonathan M. Aurnou, Susanne Horn, and Keith Julien

Phys. Rev. Research 2, 043115 (2020) - Published 21 October, 2020

The paper develops heat and momentum transport scalings for non-rotating, slowly rotating and rapidly rotating buoyancy-driven convection.

Spectral density of dense random networks and the breakdown of the Wigner semicircle law

Fernando L. Metz and Jeferson D. Silva

Phys. Rev. Research 2, 043116 (2020) - Published 22 October, 2020

The authors study the spectral density of the configuration model of complex networks and demonstrate that, even in the dense regime, the Wigner semicircle law breaks down if the degree fluctuations are large enough.

Emergence of polarization in a voter model with personalized information

Giordano De Marzo, Andrea Zaccaria, and Claudio Castellano

Phys. Rev. Research 2, 043117 (2020) - Published 22 October, 2020

This work uses a modified voter model to investigate how a personalized recommendation algorithm affects opinion dynamics, and shows how polarization can be avoided only in small groups if the strength of the recommendation is below a threshold.

Multimode N00N states in driven atomtronic circuits

Enrico Compagno, Guillaume Quesnel, Anna Minguzzi, Luigi Amico, and Denis Feinberg

Phys. Rev. Research 2, 043118 (2020) - Published 22 October, 2020

The authors propose to create multipartite entangled N00N states by driving interactions in arrays of ultracold atom wells.

Stretch and orientational mode decoupling in relaxation of highly stretched polymer melts

Anine L. Borger, Qian Huang, Ole Hassager, Jacob J. K. Kirkensgaard, Kristoffer Almdal, and Kell Mortensen

Phys. Rev. Research 2, 043119 (2020) - Published 22 October, 2020

The author presents structural studies of the relaxation characteristics of linear polymer molecules after extreme stretch. By analyzing the data in terms of spherical harmonics, the paper reveals a decoupling of local and global relaxation phenomena.

Observation of unoccupied states of SnTe(111) using pump-probe ARPES measurement

Hiroshi Ito, Yusuke Otaki, Yuta Tomohiro, Yukiaki Ishida, Ryota Akiyama, Akio Kimura, Shik Shin, and Shinji Kuroda

Phys. Rev. Research 2, 043120 (2020) - Published 22 October, 2020

The authors perform pump-probe ARPES measurement on a SnTe (111) surface to reveal the position of the Dirac point, and the Rashba splitting of the bulk valence band.

Bound spinon excitations in the spin-12 anisotropic triangular antiferromagnet Ca3ReO5Cl2

Kazuhiro Nawa, Daigorou Hirai, Maiko Kofu, Kenji Nakajima, Ryo Murasaki, Satoshi Kogane, Motoi Kimata, Hiroyuki Nojiri, Zenji Hiroi, and Taku J. Sato

Phys. Rev. Research 2, 043121 (2020) - Published 23 October, 2020

This work presents the inelastic neutron scattering spectrum on the spin-1/2 anisotropic triangular lattice antiferromagnetCa_3 ReO_5 Cl_2 , and show that the spinon-like continuum coexists with dispersive modes due to the formation of bound spinon pairs.

Compounds of symmetric informationally complete measurements and their application in quantum key distribution

Armin Tavakoli, Ingemar Bengtsson, Nicolas Gisin, and Joseph M. Renes

Phys. Rev. Research 2, 043122 (2020) - Published 23 October, 2020

The paper provides an application for symmetric informationally complete measurements in four dimensions

Coarse-grained second-order response theory

Fenna Müller, Urna Basu, Peter Sollich, and Matthias Krüger

Phys. Rev. Research 2, 043123 (2020) - Published 23 October, 2020

The authors investigate time-dependent response theory around equilibrium in a coarse-grained system and show that the second order response to arbitrary time-dependent perturbations can be found from linear response quantities

Collective oscillations of globally coupled bistable, nonresonant components

Munir Salman, Christian Bick, and Katharina Krischer

Phys. Rev. Research 2, 043125 (2020) - Published 23 October, 2020

The authors study the oscillations of bistable components and interpret the stationary states of the individual components as electrical circuits to derive a necessary condition for the occurrence of collective oscillations.

Entanglement measures of bipartite quantum gates and their thermalization under arbitrary interaction strength

Bhargavi Jonnadula, Prabha Mandayam, Karol Życzkowski, and Arul Lakshminarayan

Phys. Rev. Research 2, 043126 (2020) - Published 23 October, 2020

This article studies the entanglement landscape of bipartite unitary operators via two local invariants: the entangling power and the gate typicality.

Structural relaxation and low-energy properties of twisted bilayer graphene

Giovanni Cantele, Dario Alfè, Felice Conte, Vittorio Cataudella, Domenico Ninno, and Procolo Lucignano

Phys. Rev. Research 2, 043127 (2020) - Published 23 October, 2020

The authors use large-scale ab-initio density functional theory and tight binding calculations to study the role of atomic relaxation on the low energy physics of twisted bilayer graphene as a function of the twist angle, and show that the flat bands emerging close to charge neutrality can be described taking into account atomic relaxation.

Impossibility of coin flipping in generalized probabilistic theories via discretizations of semi-infinite programs

Jamie Sikora and John H. Selby

Phys. Rev. Research 2, 043128 (2020) - Published 23 October, 2020

This works uses semi-infinite programming to address the problem of coin flipping and shows that it is impossible in a variety of systems

Branching fractions and polarizations of DVν within QCD light-cone sum rule

Hai-Bing Fu, Wei Cheng, Long Zeng, Dan-Dan Hu, and Tao Zhong

Phys. Rev. Research 2, 043129 (2020) - Published 23 October, 2020

The authors use a QCD light-cone sum rules approach to calculate the helicity form factors of a D meson semileptonic decay into a vector meson.

Nonadiabatic noncyclic geometric quantum computation in Rydberg atoms

Bao-Jie Liu, Shi-Lei Su, and Man-Hong Yung

Phys. Rev. Research 2, 043130 (2020) - Published 23 October, 2020

This work presents an scheme to realize universal geometrical gates via non-cyclic geometric phase in Rydberg atoms. The authors show that this scheme makes it possible to accelerate the implemented geometric gates against the effects from the environmental decoherence.

Higher-order topological crystalline insulating phase and quantized hinge charge in topological electride apatite

Motoaki Hirayama, Ryo Takahashi, Satoru Matsuishi, Hideo Hosono, and Shuichi Murakami

Phys. Rev. Research 2, 043131 (2020) - Published 26 October, 2020

This paper uses ab initio calculation to show that an electride apatite, in which electrons serve as anions, realizes a three-dimensional higher-order topological phase with a quantized hinge charge.

Cracking urban mobility

H. A. Carmona, A. W. T. de Noronha, A. A. Moreira, N. A. M. Araújo, and J. S. Andrade, Jr.

Phys. Rev. Research 2, 043132 (2020) - Published 26 October, 2020

The authors apply the optimal path crack model to investigate the mobility of road networks and propose a proxy for resilience of urban mobility.

Nonlinear dynamical response of interacting bosons to synthetic electric field

Arko Roy, Soumya Bera, and Kush Saha

Phys. Rev. Research 2, 043133 (2020) - Published 26 October, 2020

The authors study the bosonic analogue of electronic higher harmonic generation in a system of neutral cold atoms. Under a strong synthetic electric field, the authors predict the generation of higher harmonics in the insulating state.

Strength and length scale of the interaction between domain walls and pinning disorder in thin ferromagnetic films

P. Géhanne, S. Rohart, A. Thiaville, and V. Jeudy

Phys. Rev. Research 2, 043134 (2020) - Published 26 October, 2020

The authors show the onset of variations of the interaction between domain wall and pinning disorder with domain wall structure.

Missing links as a source of seemingly variable constants in complex reaction networks

Zachary G. Nicolaou and Adilson E. Motter

Phys. Rev. Research 2, 043135 (2020) - Published 26 October, 2020

The authors show that the omission of small-sensitivity links can create large variations in the estimated rate constants of chemical reaction networks.

Theory of edge states based on the Hermiticity of tight-binding Hamiltonian operators

Takahiro Fukui

Phys. Rev. Research 2, 043136 (2020) - Published 27 October, 2020

The author derives edge-state Hamiltonians which describe edge-states at one end separated from the bulk spectra.

Effect of boundaries on grid cell patterns

Mauro M. Monsalve-Mercado and Christian Leibold

Phys. Rev. Research 2, 043137 (2020) - Published 27 October, 2020

The authors show how the addition of static recurrent inhibition to a system of Turing pattern formation removes pattern alignment to boundaries and explains features of medial entorhinal cortex grid cells.

Controlling particle currents with evaporation and resetting from an interval

Gennaro Tucci, Andrea Gambassi, Shamik Gupta, and Édgar Roldán

Phys. Rev. Research 2, 043138 (2020) - Published 27 October, 2020

This work uses tools of probability theory and stochastic processes to study a system of small particles moving erratically in space trying to avoid to get trapped into a tiny cage.

Ion modes in dense ionized plasmas through nonadiabatic molecular dynamics

R. A. Davis, W. A. Angermeier, R. K. T. Hermsmeier, and T. G. White

Phys. Rev. Research 2, 043139 (2020) - Published 27 October, 2020

The authors perform wave-packet molecular dynamics simulations to investigate non-adiabatic effects on the ion structure factor and sound speed of dense plasmas.

Quantum equation of motion for computing molecular excitation energies on a noisy quantum processor

Pauline J. Ollitrault, Abhinav Kandala, Chun-Fu Chen, Panagiotis Kl. Barkoutsos, Antonio Mezzacapo, Marco Pistoia, Sarah Sheldon, Stefan Woerner, Jay M. Gambetta, and Ivano Tavernelli

Phys. Rev. Research 2, 043140 (2020) - Published 27 October, 2020

The authors introduce a quantum algorithm for the calculation of molecular excited states and apply it to lithium hydride on a superconducting qubit device.

Diffusive dynamics in an amorphous superionic conductor

Christoph Tietz, Tobias Michael Fritz, Katharina Holzweber, Michael Legenstein, Bogdan Sepiol, and Michael Leitner

Phys. Rev. Research 2, 043141 (2020) - Published 27 October, 2020

This work shows that ionic diffusion in a prototypic superionic-conducting glass proceeds via vacancies moving over a temporally stable network of ionic sites.

Spin-projection for quantum computation: A low-depth approach to strong correlation

Takashi Tsuchimochi, Yuto Mori, and Seiichiro L. Ten-no

Phys. Rev. Research 2, 043142 (2020) - Published 27 October, 2020

The authors propose a quantum circuit for recovering the quantum spin number in strongly correlated fermionic systems.

Neutron powder diffraction study of NaMn2O4 and Li0.92Mn2O4: Insights on spin-charge-orbital ordering

N. Matsubara, E. Nocerino, K. Kamazawa, O. K. Forslund, Y. Sassa, L. Keller, V. V. Sikolenko, V. Pomjakushin, H. Sakurai, J. Sugiyama, and M. Månsson

Phys. Rev. Research 2, 043143 (2020) - Published 28 October, 2020

The authors study a charge-orbital-spin correlation of high-pressure synthesized quasi-one-dimensional NaMn2O4 and Li0.92Mn2O4 using a low-temperature neutron powder diffraction.

Magnetic exchange coupling in cuprate-analog d9 nickelates

Yusuke Nomura, Takuya Nomoto, Motoaki Hirayama, and Ryotaro Arita

Phys. Rev. Research 2, 043144 (2020) - Published 27 October, 2020

The authors study the magnitude of the magnetic exchange coupling in theoretically-proposed cuprate-analog nickelates, and shows that the nickelates share a common thread with the cuprates in that they also have a significant exchange coupling as large as about 100 meV.

Real-time dynamics in 2+1D compact QED using complex periodic Gaussian states

Julian Bender, Patrick Emonts, Erez Zohar, and J. Ignacio Cirac

Phys. Rev. Research 2, 043145 (2020) - Published 27 October, 2020

The authors introduce a class of variational states which allows to study ground state properties and out-of-equilibrium dynamics in (2+1)-dimensional lattice quantum electrodynamics.

Chemotaxis in uncertain environments: Hedging bets with multiple receptor types

Austin Hopkins and Brian A. Camley

Phys. Rev. Research 2, 043146 (2020) - Published 28 October, 2020

This work shows that cells should express multiple types of receptors when they are sufficiently uncertain about their environment, and also shows how cells can efficiently integrate information from these different receptor types.

Joint measurability structures realizable with qubit measurements: Incompatibility via marginal surgery

Nikola Andrejic and Ravi Kunjwal

Phys. Rev. Research 2, 043147 (2020) - Published 28 October, 2020

This paper investigates the scope of joint measurability structures that are realizable with two-outcome qubit measurements by introducing the technique of marginal surgery.

Coexistence of pseudospin- and valley-Hall-like edge states in a photonic crystal with C3v symmetry

Menglin L. N. Chen, Li Jun Jiang, Zhihao Lan, and Wei E. I. Sha

Phys. Rev. Research 2, 043148 (2020) - Published 28 October, 2020

This paper demonstrates the coexistence of pseudospin- and valley-Hall-like edge states in a photonic crystal with C3v symmetry. The system can support tri-band pseudospin- and valley-momentum locking edge states at properly designed domain-wall interfaces.

Multidimensional super- and subradiance in waveguide quantum electrodynamics

Fatih Dinc, Lauren E. Hayward, and Agata M. Brańczyk

Phys. Rev. Research 2, 043149 (2020) - Published 28 October, 2020

The authors introduce a dimensional reduction of poles approach use it to study multi-dimensional superradiance and subradiance in hyperlattices of intersecting two-level emitter linear chains

Morphological transitions in supercritical generalized percolation and moving interfaces in media with frozen randomness

Peter Grassberger

Phys. Rev. Research 2, 043150 (2020) - Published 28 October, 2020

The paper shows the onset of a spongy phase in slowly growing clusters in media with frozen obstacles in >2 dimensions, characterized by channels reaching arbitrarily far down from the outer surface.

Valley splitter and transverse valley focusing in twisted bilayer graphene

Christophe De Beule, Peter G. Silvestrov, Ming-Hao Liu (劉明豪), and Patrik Recher

Phys. Rev. Research 2, 043151 (2020) - Published 28 October, 2020

The authors consider electronic transport in twisted bilayer graphene for intermediate twist angles and find that a Lifshitz transition induced by an electrostatic barrier gives rise to valley-layer polarized currents and valley-selective transverse focusing of the current.

Quantifying tripartite entanglement with entropic correlations

James Schneeloch, Christopher C. Tison, Michael L. Fanto, Shannon Ray, and Paul M. Alsing

Phys. Rev. Research 2, 043152 (2020) - Published 28 October, 2020

The authors develop techniques to quantify multipartite and high-dimensional entanglement using information-based measures of correlation and uncertainty, and show the large amounts of multi-partite entanglement available in photon triplets generated in third-order Spontaneous Parametric Down-Conversion

Revisiting Sampson's theory for hydrodynamic transport in ultrathin nanopores

Mohammad Heiranian, Amir Taqieddin, and Narayana R. Aluru

Phys. Rev. Research 2, 043153 (2020) - Published 28 October, 2020

The authors revisit Sampson theory for hydrodynamic transport in ultrathin nanopores.

Persistence of correlations in many-body localized spin chains

Vasilii Vadimov, Tapio Ala-Nissila, and Mikko Möttönen

Phys. Rev. Research 2, 043154 (2020) - Published 29 October, 2020

The authors show that initially entangled spins subjected to a many-body localized environment preserve correlations after a long time evolution.

Artificial graphene: Unconventional superconductivity in a honeycomb superlattice

Tommy Li, Julian Ingham, and Harley D. Scammell

Phys. Rev. Research 2, 043155 (2020) - Published 29 October, 2020

The authors propose a mechanism for superconductivity due to repulsive interactions in Dirac systems based on interference effects arising from the Berry phase and show that this mechanism can be realized in semiconductor artificial graphene.

Single-domain h-BN on Pt(110): Electronic structure, correlation, and bonding

Marco Thaler, Dominik Steiner, Alexander Menzel, Florian Mittendorfer, and Erminald Bertel

Phys. Rev. Research 2, 043156 (2020) - Published 29 October, 2020

The authors study the band structure of a hexagonal Boron Nitride monolayer on a Pt(110) surface with rectangular symmetry using angle-resolved photoemission and density functional theory, and show that the bonding is dominated by van-der-Waals forces.

Weighted hypersoft configuration model

Ivan Voitalov, Pim van der Hoorn, Maksim Kitsak, Fragkiskos Papadopoulos, and Dmitri Krioukov

Phys. Rev. Research 2, 043157 (2020) - Published 29 October, 2020

The paper introduces the maximum entropy model of weighted networks with a given joint distribution of degrees and strengths, and apply it to the case where the distributions are power laws.

Sequential minimal optimization for quantum-classical hybrid algorithms

Ken M. Nakanishi, Keisuke Fujii, and Synge Todo

Phys. Rev. Research 2, 043158 (2020) - Published 29 October, 2020

The authors propose an optimization method for quantum-classical hybrid algorithms.

Partial flux ordering and thermal Majorana metals in higher-order spin liquids

Tim Eschmann, Vatsal Dwivedi, Henry F. Legg, Ciarán Hickey, and Simon Trebst

Phys. Rev. Research 2, 043159 (2020) - Published 29 October, 2020

This paper discusses the thermodynamic precursors of spin liquid formation in an exactly solvable spin-3/2 model, whose different ground states distinguish themselves by (higher-order) parton band topology.

Phonon-mediated exciton capture in Mo-based transition metal dichalcogenides

F. Lengers, T. Kuhn, and D. E. Reiter

Phys. Rev. Research 2, 043160 (2020) - Published 29 October, 2020

The authors study the spatiotemporal capture of freely moving excitons into localized excitons in two dimensional monolayer semiconductors by emission of phonons.

Renormalization group approach to spontaneous stochasticity

Gregory L. Eyink and Dmytro Bandak

Phys. Rev. Research 2, 043161 (2020) - Published 30 October, 2020

This work proposes a renormalization group theory of spontaneous stochasticity, via analogy with zero-temperature phase transitions in equilibrium systems with non-unique ground states.

Time-dependent harmonic potentials for momentum or position scaling

J. G. Muga, S. Martínez-Garaot, M. Pons, M. Palmero, and A. Tobalina

Phys. Rev. Research 2, 043162 (2020) - Published 30 October, 2020

The authors propose a method to scale up or down, or to invert the position or the momentum of quantum or classicalparticles by a time-dependent harmonic oscillator.

Verifying the output of quantum optimizers with ground-state energy lower bounds

Flavio Baccari, Christian Gogolin, Peter Wittek, and Antonio Acín

Phys. Rev. Research 2, 043163 (2020) - Published 30 October, 2020

The authors show how to benchmark the output of quantum devices designed to solve optimization problems encoded in the ground-state configuration of classical spin systems by means of lower bounds to the ground-state energy obtained by semi-definite programming.

Scrambling and decoding the charged quantum information

Junyu Liu

Phys. Rev. Research 2, 043164 (2020) - Published 30 October, 2020

The author explores the quantum butterfly effect in charged systems and their quantum error correction properties.

Topological defect networks for fractons of all types

David Aasen, Daniel Bulmash, Abhinav Prem, Kevin Slagle, and Dominic J. Williamson

Phys. Rev. Research 2, 043165 (2020) - Published 30 October, 2020

This paper introduces topological defect networks as a unified framework for describing various types of gapped fracton orders. By viewing fracton phases as a network of topological defects embedded into a topological quantum field theory, the authors show how the mobility constraints characteristic of fracton phases directly follow from topological defect physics.

Capillary deformation of ultrathin glassy polymer films by air nanobubbles

Shuai Ren, Christian Pedersen, Andreas Carlson, Thomas Salez, and Yuliang Wang

Phys. Rev. Research 2, 043166 (2020) - Published 30 October, 2020

The authors show that air nanobubbles nucleated at solid-liquid interfaces can deform ultrathin glassy polystyrene films, leading to the formation of nanocraters.

Helical damping and dynamical critical skin effect in open quantum systems

Chun-Hui Liu, Kai Zhang, Zhesen Yang, and Shu Chen

Phys. Rev. Research 2, 043167 (2020) - Published 30 October, 2020

The authors demonstrate the existence of helical damping and dynamical critical skin effect in quantum open systems and show that the change of generalized Brillouin zone equation is the origin of critical skin effect.

Diverse strategic identities induce dynamical states in evolutionary games

I. Sendiña-Nadal, I. Leyva, M. Perc, D. Papo, M. Jusup, Z. Wang, J. A. Almendral, P. Manshour, and S. Boccaletti

Phys. Rev. Research 2, 043168 (2020) - Published 2 November, 2020

This work shows the results of allowing individuals to adopt different strategies with different partners in the evolutionary dynamics, including time-dependent coexistence of cooperation and defection, system-wide shifts in the dominant strategy, and maturation in individual choices.

Soft mode behavior and evidence for pressure-induced magnetostructural effects in Pr2O3

J. E. Slimak, A. Sethi, T. Kolodiazhnyi, and S. L. Cooper

Phys. Rev. Research 2, 043169 (2020) - Published 30 October, 2020

The authors use Raman spectroscopy to study anomalous phonon-softening with decreasing temperature and the pressure- and magnetic field-dependent crystal electric field splittings in hexagonal Pr2O3.

Double magnetic reorientation transition in thin garnet films

L. T. Tsymbal, G. N. Kakazei, and Ya. B. Bazaliy

Phys. Rev. Research 2, 043170 (2020) - Published 2 November, 2020

The authors show that micrometer-thick garnet films exhibit a stripe domain structure between magnetic orientation transitions and switches to the in-plane and out-of-plane uniform states via two distinct physical mechanisms.

How to pare a pair: Topology control and pruning in intertwined complex networks

Felix Kramer and Carl D. Modes

Phys. Rev. Research 2, 043171 (2020) - Published 2 November, 2020

The authors study a toy model of two geometrically intertwined biological flow networks and display the topological transitions in the networks resulting from spatial coupling between the two structures.

Improving key rates of the unbalanced phase-encoded BB84 protocol using the flag-state squashing model

Nicky Kai Hong Li and Norbert Lütkenhaus

Phys. Rev. Research 2, 043172 (2020) - Published 2 November, 2020

The authors show the emergence of secret keys in the BB84 protocol in the low-loss regime.

Self-waveguiding of relativistic laser pulses in neutral gas channels

L. Feder, B. Miao, J. E. Shrock, A. Goffin, and H. M. Milchberg

Phys. Rev. Research 2, 043173 (2020) - Published 3 November, 2020

The authors show that an ultrashort, relativistic intensity laser pulse can propagate for hundreds of Rayleigh ranges in a prepared neutral hydrogen channel by generating its own plasma waveguide as it propagates.

Search with home returns provides advantage under high uncertainty

Arnab Pal, Łukasz Kuśmierz, and Shlomi Reuveni

Phys. Rev. Research 2, 043174 (2020) - Published 3 November, 2020

The authors show an advantage in home returns when searching for hidden targets in conditions of high uncertainty.

Single shot x-ray diffractometry in SACLA with pulsed magnetic fields up to 16 T

Akihiko Ikeda, Yasuhiro H. Matsuda, Xuguang Zhou, Takeshi Yajima, Yuya Kubota, Kensuke Tono, and Makina Yabashi

Phys. Rev. Research 2, 043175 (2020) - Published 3 November, 2020

The paper describes the single shot x-ray diffraction experiments at pulsed high magnetic fields up to 16 T and show the onset of the structural phase transition of a manganite.

Resonance frequency and radiative Q-factor of plasmonic and dielectric modes of small objects

Carlo Forestiere, Giovanni Miano, and Guglielmo Rubinacci

Phys. Rev. Research 2, 043176 (2020) - Published 3 November, 2020

The authors investigate the problem of electromagnetic scattering by small objects perturbatively starting from the electroquasistatic and magnetoquasistatic limits, and introduce closed form expressions for the resonance frequency and radiative Q-factor of plasmonic and dielectric modes.

Decay-rate power-law exponent as a link between dissociation energy and temperature

Paul Fischer and Lutz Schweikhard

Phys. Rev. Research 2, 043177 (2020) - Published 3 November, 2020

The authors perform multi-reflection time-of-flight mass spectrometry of time-resolved photodissociation of indium clusters and observe a power-law exponent of the decay rate links cluster dissociation energy and ensemble temperature.

Complexity of quantum motion and quantum-classical correspondence: A phase-space approach

Jiaozi Wang, Giuliano Benenti, Giulio Casati, and Wen-ge Wang

Phys. Rev. Research 2, 043178 (2020) - Published 3 November, 2020

The authors show that the number of Fourier components of the Wigner distribution can be used as a tool to characterize complexity in classical and quantum mechanics.

Coupling of lattice, spin, and intraconfigurational excitations of Eu3+ in Eu2ZnIrO6

Birender Singh, M. Vogl, S. Wurmehl, S. Aswartham, B. Büchner, and Pradeep Kumar

Phys. Rev. Research 2, 043179 (2020) - Published 3 November, 2020

This paper studies the coupling of optical phonons to the spin and electronic degrees of freedom and its influence in defining the quantum magnetic ground state of double-perovskite iridium-based materials.

Electromagnetic control of valley splitting in ideal and disordered Si quantum dots

Amin Hosseinkhani and Guido Burkard

Phys. Rev. Research 2, 043180 (2020) - Published 3 November, 2020

The authors develop a perturbative approach and show that the response of the valley splitting to the electromagnetic field in silicon quantum dots depends on the interface roughness.

Metallic islands in the Kondo insulator SmB6

J. C. Souza, P. F. S. Rosa, J. Sichelschmidt, M. Carlone, P. A. Venegas, M. O. Malcolms, P. M. Menegasso, R. R. Urbano, Z. Fisk, and P. G. Pagliuso

Phys. Rev. Research 2, 043181 (2020) - Published 3 November, 2020

The authors study the effects of magnetic impurities in a Kondo insulator and demonstrate that the Kondo insulating state is destroyed locally around impurities.

Destabilizing excitonic insulator phase by pressure tuning of exciton-phonon coupling

Sukanya Pal, Shivani Grover, Luminita Harnagea, Prachi Telang, Anupam Singh, D. V. S. Muthu, U. V. Waghmare, and A. K. Sood

Phys. Rev. Research 2, 043182 (2020) - Published 4 November, 2020

The authors use high-pressure Raman spectroscopy along with a first-principles model analysis to study the role of exciton-phonon coupling in stabilizing the excitonic insulator phase of Ta2NiSe5 at room temperature.

Magnetic and ferroelectric properties of Sr1xBaxMnO3 from first principles

Alexander Edström and Claude Ederer

Phys. Rev. Research 2, 043183 (2020) - Published 4 November, 2020

This study shows that a Ba substitution enhances the magnetic coupling in (Sr,Ba)MnO3, while the ferroelectric properties are controlled mainly by the lattice expansion along the polarization direction, but also affected by a strong magnetoelectric coupling.

Mechanism of decoherence-free coupling between giant atoms

Angelo Carollo, Dario Cilluffo, and Francesco Ciccarello

Phys. Rev. Research 2, 043184 (2020) - Published 4 November, 2020

The authors propose a general mechanism to build decoherence-free many-body Hamiltonian with giant-atoms in a broadband waveguide and compare it to standard dispersive approaches with normal atoms.

Polariton interactions in microcavities with atomically thin semiconductor layers

Olivier Bleu, Guangyao Li, Jesper Levinsen, and Meera M. Parish

Phys. Rev. Research 2, 043185 (2020) - Published 4 November, 2020

The authors analyze polariton-polariton elastic scattering and find that it is enhanced with respect to the low-energy scattering of excitons in two-dimensions.

Sailing towards the stars close to the speed of light

André Fűzfa, Williams Dhelonga-Biarufu, and Olivier Welcomme

Phys. Rev. Research 2, 043186 (2020) - Published 5 November, 2020

The authors describe the general motion of radiation-pushed sails accelerated near the speed of light with directed energy propulsion.

Optimal operation of a three-level quantum heat engine and universal nature of efficiency

Varinder Singh

Phys. Rev. Research 2, 043187 (2020) - Published 5 November, 2020

This paper investigates the efficiency at the optimal performance of a three-level laser quantum heat engine.

Conditional emergence of classical domain and branching of quantum histories

Alexei V. Tkachenko

Phys. Rev. Research 2, 043188 (2020) - Published 5 November, 2020

This paper shows that classicality is an emergent and reversible property that arises when a part of a quantum system becomes informationally isolated.

Optimal environment localization

Jason L. Pereira, Quntao Zhuang, and Stefano Pirandola

Phys. Rev. Research 2, 043189 (2020) - Published 5 November, 2020

This paper presents ultimate bounds for the task of finding a target quantum channel in a sequence of background channels with the same transmissivity and shows that an advantage can be gained by using quantum states as probes.

Antichiral states in twisted graphene multilayers

M. Michael Denner, J. L. Lado, and Oded Zilberberg

Phys. Rev. Research 2, 043190 (2020) - Published 5 November, 2020

The authors present a controllable procedure to realize anti-chiral states in solid-state systems, as well as in quantum engineered metamaterials. These states emerge by combining electronic Dirac-cone spectra of graphene multilayers through an in-plane magnetic field and inter-layer bias voltage.

Operational entanglement of symmetry-protected topological edge states

Kyle Monkman and Jesko Sirker

Phys. Rev. Research 2, 043191 (2020) - Published 6 November, 2020

The authors explore the connection between symmetry-protected topological edge states and the amount of operational entanglement that can be transferred to a quantum register, and show that the build-up of entanglement can be inferred from particle number spectroscopy alone.

Half quantum vortices in a nematic superconductor

Pye Ton How and Sung-Kit Yip

Phys. Rev. Research 2, 043192 (2020) - Published 6 November, 2020

The authors examine half quantum vortices in the nematic superconductor MxBi2Se3 and find that pairs of vortices are stable over a large region of parameter space.

Signatures of odd-frequency pairing in the Josephson junction current noise

Rubén Seoane Souto, Dushko Kuzmanovski, and Alexander V. Balatsky

Phys. Rev. Research 2, 043193 (2020) - Published 6 November, 2020

The authors investigate the supercurrent noise in phase-biased superconducting weak links as a possible probe of inter-lead odd-frequency pairing, so-called Berezinskii pairs.

High-fidelity composite quantum gates for Raman qubits

Boyan T. Torosov and Nikolay V. Vitanov

Phys. Rev. Research 2, 043194 (2020) - Published 6 November, 2020

The authors present an approach to design high-fidelity quantum logic gates with Raman qubits using the technique of composite pulses.

Stationary states and instabilities of a Möbius fiber resonator

Calum Maitland, Matteo Conforti, Arnaud Mussot, and Fabio Biancalana

Phys. Rev. Research 2, 043195 (2020) - Published 6 November, 2020

This paper explores the steady state behaviour of an optical resonator composed of two interlinked fibre loops and observe the onset of cavity solitons and modulation instability spectra.

Discharging dynamics of topological batteries

Vishal P. Patil, Žiga Kos, Miha Ravnik, and Jörn Dunkel

Phys. Rev. Research 2, 043196 (2020) - Published 6 November, 2020

The authors compare the dynamics of energy release from broken topological states in elastic fibers and nematic liquid crystals, and find that certain topologies exhibit a form of resonance in which the energy relaxation becomes very slow or fast.

Dirty higher-order Dirac semimetal: Quantum criticality and bulk-boundary correspondence

András L. Szabó and Bitan Roy

Phys. Rev. Research 2, 043197 (2020) - Published 6 November, 2020

The authors demonstrate the stability of higher-order Dirac fermions and the corresponding one-dimensional hinge modes against weak disorder. At the brink of metallicity, they also show a possible emergent superuniversality in the entire family of dirty Dirac semimetals.

Breaking time-reversal and translational symmetry at edges of d-wave superconductors: Microscopic theory and comparison with quasiclassical theory

N. Wall Wennerdal, A. Ask, P. Holmvall, T. Löfwander, and M. Fogelström

Phys. Rev. Research 2, 043198 (2020) - Published 6 November, 2020

The authors present a microscopic tight-binding study of a stable low-temperature phase that breaks both time-reversal and translational invariance in d-wave superconductors.

Symmetry breaking of dipole orientations on Caspar-Klug lattices

Simon Čopar and Anže Božič

Phys. Rev. Research 2, 043199 (2020) - Published 6 November, 2020

The authors show that dipole-dipole interactions can break the icosahedral symmetry in spherical assemblies result in orientational structures with a variety of different symmetries

Nuclear surface acoustic resonance with spin-rotation coupling

Koji Usami and Kazuyuki Takeda

Phys. Rev. Research 2, 043200 (2020) - Published 9 November, 2020

The authors describe a pathway to detect nuclear spin resonance with surface acoustic wave cavities for thin specimens, where the spin-rotation coupling is relevant.

Counterdiabatic control of transport in a synthetic tight-binding lattice

Eric J. Meier, Kinfung Ngan, Dries Sels, and Bryce Gadway

Phys. Rev. Research 2, 043201 (2020) - Published 9 November, 2020

The authors test a shortcut-to-adiabaticity scheme by directly countering diabatic transitions which occur during several experiments with time-dependent, many-level systems of ultracold atoms in a synthetic lattice.

Nuclear liquid-gas phase transition with machine learning

Rui Wang, Yu-Gang Ma, R. Wada, Lie-Wen Chen, Wan-Bing He, Huan-Ling Liu, and Kai-Jia Sun

Phys. Rev. Research 2, 043202 (2020) - Published 9 November, 2020

The authors employ machine learning techniques to identify nuclear liquid-gas phase transition in heavy-ion experiment and determine its limiting temperature, directly from the experimental final state charged particles’ multiplicity distribution.

Electrical spectroscopy of forward volume spin waves in perpendicularly magnetized materials

M. Sushruth, M. Grassi, K. Ait-Oukaci, D. Stoeffler, Y. Henry, D. Lacour, M. Hehn, U. Bhaskar, M. Bailleul, T. Devolder, and J.-P. Adam

Phys. Rev. Research 2, 043203 (2020) - Published 9 November, 2020

The authors present a model of the electrical spectroscopy of propagative spin-waves in samples with perpendicular magnetic anisotropy, focusing on how the shape of the antenna favors the excitation and detection of the spin-waves between the antennas, and of the magnetic damping.

Dynamical Josephson effects in NbSe2

S. Tran, J. Sell, and J. R. Williams

Phys. Rev. Research 2, 043204 (2020) - Published 9 November, 2020

This paper uses the Josephson effect and vortex production to unveil properties of the thin-film superconductor NbSe2, using the nonequilibrium behavior of thin-film superconductors.

Preparation of an exciton condensate of photons on a 53-qubit quantum computer

LeeAnn M. Sager, Scott E. Smart, and David A. Mazziotti

Phys. Rev. Research 2, 043205 (2020) - Published 9 November, 2020

The authors prepare highly entangled quantum states on a 53-qubit IBM quantum computer, which are viewed as ground-state exciton condensates composed of photon particles and holes.

Theory of noninteracting fermions and bosons in the canonical ensemble

Hatem Barghathi, Jiangyong Yu, and Adrian Del Maestro

Phys. Rev. Research 2, 043206 (2020) - Published 9 November, 2020

This work introduces a framework for treating indistinguishable quantum particles in the canonical ensemble that allows for the direct computation of thermodynamic properties including energy levels-occupation probability distributions and their corresponding occupation-numbers and correlations.

Laser-induced ultrafast insulator-metal transition in BaBiO3

Alexander E. Lukyanov, Vyacheslav D. Neverov, Yaroslav V. Zhumagulov, Alexey P. Menushenkov, Andrey V. Krasavin, and Alexei Vagov

Phys. Rev. Research 2, 043207 (2020) - Published 9 November, 2020

The authors describe the effect of an external laser pulse in restoring the lattice symmetry in strong phonon-carrier coupling in undoped BaBiO3.

Universal conductance dips and fractional excitations in a two-subband quantum wire

Chen-Hsuan Hsu, Flavio Ronetti, Peter Stano, Jelena Klinovaja, and Daniel Loss

Phys. Rev. Research 2, 043208 (2020) - Published 9 November, 2020

This work shows that the combination of electron-electron interactions and a helical magnetic field, arising from either intrinsic or extrinsic spin-orbit coupling, can lead to universal conductance dips and fractional excitations in a quasi-one-dimensional quantum wire.

Chiral flat band superconductivity from symmetry-protected three-band crossings

Yu-Ping Lin

Phys. Rev. Research 2, 043209 (2020) - Published 9 November, 2020

The author analyzes potential flat band superconductivity from the unconventional spin-1 fermionic three-band crossing points, where the critical temperature is enhanced and the Majorana fermions may arise in the chiral pairing states.

Metastable order protected by destructive many-body interference

M. Nuske, J. Vargas, M. Hachmann, R. Eichberger, L. Mathey, and A. Hemmerich

Phys. Rev. Research 2, 043210 (2020) - Published 9 November, 2020

The authors show how collisional relaxation of cold atoms prepared in an excited band of an optical lattice proceeds via an intermediate metastable state with increased coherence and chiral order.

Partially disordered state with short-range spin correlation in S=5/2 classical triangular antiferromagnet Ag2FeO2

H. K. Yoshida, M. Matsuda, M. B. Stone, C. R. dela Cruz, T. Furubayashi, M. Onoda, E. Takayama-Muromachi, and M. Isobe

Phys. Rev. Research 2, 043211 (2020) - Published 10 November, 2020

This paper investigates the magnetic state of triangular antiferromagnets with metalic conductivity. The authors observe a slowing down of a spin fluctuation in the 3-sublattice partially disordered state and associate it to the magetic frustration on the two-dimensional triangular lattice.

Information theoretic network approach to socioeconomic correlations

Alec Kirkley

Phys. Rev. Research 2, 043212 (2020) - Published 10 November, 2020

This study develops a scale-independent framework for assessing correlations in distributional data based on regional adjacency networks and information theory, and applies it to various problems related to the spatial analysis of socioeconomic data.

Atomic-waveguide quantum electrodynamics

Stuart J. Masson and Ana Asenjo-Garcia

Phys. Rev. Research 2, 043213 (2020) - Published 10 November, 2020

The authors study single and few-photon physics of atomic chains and propose to use them to mediate tunable-range interactions between impurity qubits coupled to them.

Higgs time crystal in a high-Tc superconductor

Guido Homann, Jayson G. Cosme, and Ludwig Mathey

Phys. Rev. Research 2, 043214 (2020) - Published 10 November, 2020

The authors propose to induce a time crystalline state in a high-temperature superconductor by optically driving a sum resonance of the Higgs mode and a Josephson plasma mode.

Threefold way to the dimension reduction of dynamics on networks: An application to synchronization

Vincent Thibeault, Guillaume St-Onge, Louis J. Dubé, and Patrick Desrosiers

Phys. Rev. Research 2, 043215 (2020) - Published 11 November, 2020

This paper introduces a dynamics approximate reduction technique to provide low-dimensional representations of dynamics on complex networks, and use it to predict synchronization phenomena emerging from oscillator dynamics.

Influence of the excitation conditions on the emission behavior of carbon nanodot-based planar microcavities

Lukas Trefflich, Chris Sturm, Marius Grundmann, Frank Dissinger, Siegfried R. Waldvogel, and Rüdiger Schmidt-Grund

Phys. Rev. Research 2, 043216 (2020) - Published 11 November, 2020

The authors investigate the influence of the pulse length as well as the repetition rate of the optical excitation on the emission behavior of carbon-nanodot-based planar microcavities.

Microscopic biophysical model of self-organization in tissue due to feedback between cell- and macroscopic-scale forces

J. P. Hague, P. W. Mieczkowski, C. O'Rourke, A. J. Loughlin, and J. B. Phillips

Phys. Rev. Research 2, 043217 (2020) - Published 11 November, 2020

This paper introduces a microscopic model for the organization of cells in tissue, that incorporates the feedback between macroscopic tensions in the extracellular matrix and cell-scale active forces, by combining force-dipole and a contractile network approach.

Ultracold Bose mixtures with spin-dependent fermion-mediated interactions

Renyuan Liao

Phys. Rev. Research 2, 043218 (2020) - Published 12 November, 2020

This work investigates two-component bosons coupled with polarized fermions. It shows that the effective spin-dependent fermion mediated interactions can have effects on the properties of the bosons.

Non-Abelian gauged fracton matter field theory: Sigma models, superfluids, and vortices

Juven Wang and Shing-Tung Yau

Phys. Rev. Research 2, 043219 (2020) - Published 12 November, 2020

This work constructs a non-abelian gauged fracton matter field theory and explore a superfluid-insulator-like phase transition and the non-abelian vortices via a sigma model.

Experimental demonstration of crowd synchrony and first-order transition with lasers

Simon Mahler, Asher A. Friesem, and Nir Davidson

Phys. Rev. Research 2, 043220 (2020) - Published 12 November, 2020

The authors experimentally demonstrate the effect of crowd synchrony with lasers where a first-order transition to synchronization occurs.

Robust superconductivity intertwined with charge density wave and disorder in Pd-intercalated ErTe3

Alan Fang, Anisha G. Singh, Joshua A. W. Straquadine, Ian R. Fisher, Steven A. Kivelson, and Aharon Kapitulnik

Phys. Rev. Research 2, 043221 (2020) - Published 12 November, 2020

The authors combine data from Scanning Tunneling Spectroscopy, resistivity, and ac susceptibility to explore the relation between charge density waves and superconducting orders in Pd-intercalated ErTe3.

Information swimmer: Self-propulsion without energy dissipation

Chen Huang, Mingnan Ding, and Xiangjun Xing

Phys. Rev. Research 2, 043222 (2020) - Published 12 November, 2020

This work studies an information-based mechanism of self-propulsion in noisy environment by which the swimmer maintains directional motion at the cost of information instead of energy dissipation.

Time-reversal-invariant C2-symmetric higher-order topological superconductors

DinhDuy Vu, Rui-Xing Zhang, and S. Das Sarma

Phys. Rev. Research 2, 043223 (2020) - Published 12 November, 2020

This work proposes a real-space criterion to diagnose C2-protected higher-order topology for time-reversal-invariant superconductors in two dimensions.

Robust position sensing with wave fingerprints in dynamic complex propagation environments

Philipp del Hougne

Phys. Rev. Research 2, 043224 (2020) - Published 12 November, 2020

The author demonstrates that wave fingerprints harnessing the extreme sensitivity of wave chaos to perturbations can be used to localize an object inside a complex scattering environment.

Oscillatory chiral flows in confined active fluids with obstacles

Bo Zhang, Benjamin Hilton, Christopher Short, Anton Souslov, and Alexey Snezhko

Phys. Rev. Research 2, 043225 (2020) - Published 12 November, 2020

The authors combine experiments and simulations to investigate collective chiral states of a confined polar active fluid with scatterers and show the onset of three dynamic steady states.

Magnon pair emission from a relativistic domain wall in antiferromagnets

Gen Tatara, Collins Ashu Akosa, and Rubén M. Otxoa de Zuazola

Phys. Rev. Research 2, 043226 (2020) - Published 12 November, 2020

The authors study magnon emission from a relativistic soliton in an antiferromagnet, induced by a vacuum instability due to a Lorentz-boosted magnon response function.

High-purity free-electron momentum states prepared by three-dimensional optical phase modulation

Armin Feist, Sergey V. Yalunin, Sascha Schäfer, and Claus Ropers

Phys. Rev. Research 2, 043227 (2020) - Published 12 November, 2020

This paper demonstrates a laser-based and femtosecond-switchable inelastic electron beam splitter. Coherent optical phase modulation of 200-keV electrons at a thin electron-transparent membrane is used to prepare a high-purity three-dimensional momentum superposition state, which is characterized in energy and momentum space.

Signatures of topological ground state degeneracy in Majorana islands

Jukka I. Väyrynen, Adrian E. Feiguin, and Roman M. Lutchyn

Phys. Rev. Research 2, 043228 (2020) - Published 13 November, 2020

The authors study conductance and average charge in a Majorana island coupled to many normal metal leads. The topological ground state degeneracy leads to enhanced charge fluctuations and suppression of Coulomb blockade in conductance.

Testing dissipative collapse models with a levitated micromagnet

A. Vinante, G. Gasbarri, C. Timberlake, M. Toroš, and H. Ulbricht

Phys. Rev. Research 2, 043229 (2020) - Published 13 November, 2020

The authors summarize the dissipative extensions of spontaneous wavefunction collapse models and derive new exclusion limits on the parameters of different models from an experiment based on a micromagnet levitated by Meissner effect.

Decoherence as a detector of the Unruh effect

Alexander I. Nesterov, Manuel A. Rodríguez Fernández, Gennady P. Berman, and Xidi Wang

Phys. Rev. Research 2, 043230 (2020) - Published 13 November, 2020

The authors propose a Unruh-DeWitt detector based on the decoherence measurement.

Effect of directed aging on nonlinear elasticity and memory formation in a material

Daniel Hexner, Nidhi Pashine, Andrea J. Liu, and Sidney R. Nagel

Phys. Rev. Research 2, 043231 (2020) - Published 13 November, 2020

The authors show how disordered networks aged under external strain attain a memory of their aging history.

Entanglement dynamics in dissipative photonic Mott insulators

Kaelan Donatella, Alberto Biella, Alexandre Le Boité, and Cristiano Ciuti

Phys. Rev. Research 2, 043232 (2020) - Published 13 November, 2020

The authors show how entanglement can be generated and propagate in a dissipative photonic Mott insulator, and how the generation protocol affects the entanglement dynamics of such systems.

Topological states in disordered arrays of dielectric nanoparticles

Ling Lin, Sergey Kruk, Yongguan Ke, Chaohong Lee, and Yuri Kivshar

Phys. Rev. Research 2, 043233 (2020) - Published 13 November, 2020

This paper studies the interplay between disorder and topology in several types of Mie-resonant arrays of dielectric nanoparticles.

Euclidean operator growth and quantum chaos

Alexander Avdoshkin and Anatoly Dymarsky

Phys. Rev. Research 2, 043234 (2020) - Published 13 November, 2020

The authors show how the geometry of a lattice system constrains the norm of local operators evolved in Euclidean time.

Chiral resolution by composite Raman pulses

Boyan T. Torosov, Michael Drewsen, and Nikolay V. Vitanov

Phys. Rev. Research 2, 043235 (2020) - Published 13 November, 2020

The authors present two methods to detect chiral molecules, based on sequences of single pulses and Raman pulse pairs.

Minimally entangled typical thermal states algorithm with Trotter gates

Shimpei Goto and Ippei Danshita

Phys. Rev. Research 2, 043236 (2020) - Published 13 November, 2020

The authors show that the numerical efficiency of a method for simulating quantum many-body systems at finite temperatures can be improved using initial states entangled via the operation of Trotter gates.

Exploring the non-equilibrium fluctuation relation for quantum mechanical tunneling of electrons across a modulating barrier

Dibya J. Sivananda, Nirmal Roy, P. C. Mahato, and S. S. Banerjee

Phys. Rev. Research 2, 043237 (2020) - Published 16 November, 2020

The authors study the irreversibility of electron trajectories associated with quantum mechanical tunnelling across a modulated barrier, and show these quantum mechanical trajectories obey the non-equilibrium fluctuation relation.

Density functionals and Kohn-Sham potentials with minimal wavefunction preparations on a quantum computer

Thomas E. Baker and David Poulin

Phys. Rev. Research 2, 043238 (2020) - Published 16 November, 2020

The authors propose a method to export quantum chemistry solutions from a quantum computer. Their scheme does not require excessive wavefunction preparations and yields the density functional and Kohn-Sham potentials.

Time-crystalline phases and period-doubling oscillations in one-dimensional Floquet topological insulators

Yiming Pan and Bing Wang

Phys. Rev. Research 2, 043239 (2020) - Published 16 November, 2020

This paper shows the onset of topologically-protected Floquet time crystals in one-dimensional periodically driven systems with pertinent period-2T oscillations for both driven domain walls and edge states.

Atom-interferometric test of the universality of gravitational redshift and free fall

Christian Ufrecht, Fabio Di Pumpo, Alexander Friedrich, Albert Roura, Christian Schubert, Dennis Schlippert, Ernst M. Rasel, Wolfgang P. Schleich, and Enno Giese

Phys. Rev. Research 2, 043240 (2020) - Published 16 November, 2020

This work proposes quantum-mechanical tests of the gravitational redshift through atom interferometry. The sensitivity of this scheme arises from transitions between internal states.

Evidence of many thermodynamic states of the three-dimensional Ising spin glass

Wenlong Wang, Mats Wallin, and Jack Lidmar

Phys. Rev. Research 2, 043241 (2020) - Published 16 November, 2020

The authors present simulations of three-dimensional spin glasses at low temperatures and show the appearance of several thermodynamic states.

Effective field theory for fractional quantum Hall systems near ν=5/2

Po-Shen Hsin, Ying-Hsuan Lin, Natalie M. Paquette, and Juven Wang

Phys. Rev. Research 2, 043242 (2020) - Published 16 November, 2020

This work constructs an effective field theory of fractional quantum Hall systems near the filling fraction ν=5/2, which can map out an EFT phase diagram with non-abelian Pfaffian, anti-Pfaffian, and particle-hole Pfaffian states, and their gapless topological quantum phase transitions.

Resummation of the Holstein-Primakoff expansion and differential equation approach to operator square roots

Michael Vogl, Pontus Laurell, Hao Zhang, Satoshi Okamoto, and Gregory A. Fiete

Phys. Rev. Research 2, 043243 (2020) - Published 17 November, 2020

The article describes differential equations that allow an approximation of operator square-roots and their application to the Holstein-Primakoff representation of spin operators.

Nonreciprocal interactions induced by water in confinement

Felipe Jiménez-Ángeles, Katherine J. Harmon, Trung Dac Nguyen, Paul Fenter, and Monica Olvera de la Cruz

Phys. Rev. Research 2, 043244 (2020) - Published 17 November, 2020

The authors show that polarizable and nonpolarizable ions near graphene in water produce nonsymmetric interactions when exchange positions. This broken symmetry happens for intercalated and physisorbed ions.

Klein tunneling of optically tunable Dirac particles with elliptical dispersions

Andrii Iurov, Liubov Zhemchuzhna, Paula Fekete, Godfrey Gumbs, and Danhong Huang

Phys. Rev. Research 2, 043245 (2020) - Published 17 November, 2020

This paper shows the asymmetrical Klein paradox with a finite incidence angle induced by an external linearly polarized dressing field for graphene and a dice lattice.

Avoiding local minima in variational quantum eigensolvers with the natural gradient optimizer

David Wierichs, Christian Gogolin, and Michael Kastoryano

Phys. Rev. Research 2, 043246 (2020) - Published 17 November, 2020

This paper shows the convergence of the natural gradient optimizer for the variational quantum eigensolver across multiple spin chain systems.

Universal finite-time thermodynamics of many-body quantum machines from Kibble-Zurek scaling

Revathy B. S, Victor Mukherjee, Uma Divakaran, and Adolfo del Campo

Phys. Rev. Research 2, 043247 (2020) - Published 18 November, 2020

The authors show that when the operation of a quantum machine drives the working substance across a phase transition, its finite-time thermodynamics is universal.

Probing the Debye spectrum in glasses using small system sizes

Matteo Paoluzzi, Luca Angelani, Giorgio Parisi, and Giancarlo Ruocco

Phys. Rev. Research 2, 043248 (2020) - Published 18 November, 2020

The work aims to show that small system sizes in numerical simulations turns out to be useful for investigating the Debye spectrum in glasses.

Emergence of active topological glass through directed chain dynamics and nonequilibrium phase segregation

Iurii Chubak, Christos N. Likos, Kurt Kremer, and Jan Smrek

Phys. Rev. Research 2, 043249 (2020) - Published 18 November, 2020

This work shows how glassy behavior emerges from the active, directed polymer dynamics that is triggered by the non-equilibrium phase separation.

Pedestrian dynamics with mechanisms of anticipation and attraction

Yi-Xuan Lü, Zhi-Xi Wu, and Jian-Yue Guan

Phys. Rev. Research 2, 043250 (2020) - Published 18 November, 2020

The authors propose a model of pedestrian dynamics based on a combined mechanism of avoiding potential collision and attraction by peer partners.

State-to-state methane-surface scattering as a probe of catalytic activity

Jörn Werdecker, Bo-Jung Chen, Maarten E. Van Reijzen, Azar Farjamnia, Bret Jackson, and Rainer D. Beck

Phys. Rev. Research 2, 043251 (2020) - Published 18 November, 2020

The paper uses Quantum state-resolved scattering experiment and theory to show that surface-induced intramolecular vibrational energy redistribution in methane-surface scattering is related to the catalytic activity of the impact site.

Efficient generation of extreme terahertz harmonics in three-dimensional Dirac semimetals

Jeremy Lim, Yee Sin Ang, F. Javier García de Abajo, Ido Kaminer, Lay Kee Ang, and Liang Jie Wong

Phys. Rev. Research 2, 043252 (2020) - Published 18 November, 2020

This paper reveals two regimes in the nonlinear optical response of three-dimensional Dirac semimetals characterized by the degree of nonlinearity.

Possible coexistence of kinetic Alfvén and ion Bernstein modes in sub-ion scale compressive turbulence in the solar wind

Owen Wyn Roberts, Daniel Verscharen, Yasuhito Narita, Rumi Nakamura, Zoltán Vörös, and Ferdinand Plaschke

Phys. Rev. Research 2, 043253 (2020) - Published 18 November, 2020

The authors obtain the fluctuation properties of density fluctuations in the solar wind at scales of a few kilometers, using the four spacecraft measurements from the Magnetospheric MultiScale mission.

Statistical mechanics of kinks on a gliding screw dislocation

Max Boleininger, Martin Gallauer, Sergei L. Dudarev, Thomas D. Swinburne, Daniel R. Mason, and Danny Perez

Phys. Rev. Research 2, 043254 (2020) - Published 18 November, 2020

This work presents a solution for the steady-state drift velocity of a screw dislocation subjected to shear stress. The authors find that the activation energy for drift is halved at high temperature, as the system crosses into the thermodynamic limit.

Theoretical methods to treat a single dissipative bosonic mode coupled globally to an interacting many-body system

Catalin-Mihai Halati, Ameneh Sheikhan, and Corinna Kollath

Phys. Rev. Research 2, 043255 (2020) - Published 18 November, 2020

The authors develop a numerical matrix product states method and an analytical adiabatic elimination method to study interacting many body systems coupled to a dissipative bosonic mode.

Quench-produced solitons in a box-trapped Bose-Einstein condensate

E. J. Halperin and J. L. Bohn

Phys. Rev. Research 2, 043256 (2020) - Published 19 November, 2020

This paper shows that pure solitons can be created from the ground state of Bose-Einstein condensate in a box trap by quenching the scattering length to four times its initial value.

Coarse-grained entropy production with multiple reservoirs: Unraveling the role of time scales and detailed balance in biology-inspired systems

Daniel M. Busiello, Deepak Gupta, and Amos Maritan

Phys. Rev. Research 2, 043257 (2020) - Published 19 November, 2020

The authors derive expressions of the entropy production when an out of equilibrium biologically-inspired system has two well separated timescales.

Zero-temperature phases of the two-dimensional Hubbard-Holstein model: A non-Gaussian exact diagonalization study

Yao Wang, Ilya Esterlis, Tao Shi, J. Ignacio Cirac, and Eugene Demler

Phys. Rev. Research 2, 043258 (2020) - Published 19 November, 2020

The authors develop a variational non-Gaussian diagonalization method as an solver for strongly correlated electron-electron and electron-phonon systems, and explore the phase diagram of the two-dimensional Hubbard-Holstein model.

Ground-state phase diagram of the three-band Hubbard model from density matrix embedding theory

Zhi-Hao Cui, Chong Sun, Ushnish Ray, Bo-Xiao Zheng, Qiming Sun, and Garnet Kin-Lic Chan

Phys. Rev. Research 2, 043259 (2020) - Published 19 November, 2020

The authors use a density matrix embedding theory to characterize the ground-state phase diagram of the three-band Hubbard model, and focus on the atomic-scale nature of the antiferromagnetic and superconducting orders by including the oxygen degrees of freedom.

Detecting and tracking bacteria with quantum light

Gaetana Spedalieri, Lolita Piersimoni, Omar Laurino, Samuel L. Braunstein, and Stefano Pirandola

Phys. Rev. Research 2, 043260 (2020) - Published 19 November, 2020

The authors show that low energetic quantum states of light are able to outperform classical coherent sources in performing non-invasive detection and identification of bacteria.

Decoupled synchronized states in networks of linearly coupled limit cycle oscillators

Anastasiya Salova and Raissa M. D'Souza

Phys. Rev. Research 2, 043261 (2020) - Published 19 November, 2020

This article develops a framework for analyzing decoupled states in networks of limit cycle oscillators with phase shift symmetry, formulates the conditions on network structure that allows these states to exist, and demonstrates how that structure can be used for stability calculations.

Active Brownian heat engines

Viktor Holubec, Stefano Steffenoni, Gianmaria Falasco, and Klaus Kroy

Phys. Rev. Research 2, 043262 (2020) - Published 19 November, 2020

The authors study cyclically operating heat engines in contact with an energy reservoir to study heat in nonequilibrium systems.

Spectral properties of heterostructures containing half-metallic ferromagnets in the presence of local many-body correlations

A. Weh, J. Otsuki, H. Schnait, H. G. Evertz, U. Eckern, A. I. Lichtenstein, and L. Chioncel

Phys. Rev. Research 2, 043263 (2020) - Published 19 November, 2020

The authors study the spectral properties of heterostructures containing half-metallic ferromagnets for strongly correlated models, and show that non-quasiparticle tails in the density of states at the interface to a Mott insulator may be reduced.

Rényi entropy singularities as signatures of topological criticality in coupled photon-fermion systems

F. P. M. Méndez-Córdoba, J. J. Mendoza-Arenas, F. J. Gómez-Ruiz, F. J. Rodríguez, C. Tejedor, and L. Quiroga

Phys. Rev. Research 2, 043264 (2020) - Published 20 November, 2020

This work reports a direct relation between a quantum entanglement entropy and photon observables for a topological chain embedded in a microwave cavity.

Fermionic criticality of anisotropic nodal point semimetals away from the upper critical dimension: Exact exponents to leading order in 1Nf

Mikolaj D. Uryszek, Frank Krüger, and Elliot Christou

Phys. Rev. Research 2, 043265 (2020) - Published 20 November, 2020

The authors use a soft cutoff renormalization-group approach to study quantum phase transitions of anisotropic nodal point semimetals in the large N limit and physically relevant spatial dimensions.

Role of rare events in the pinning problem

M. Buchacek, V. B. Geshkenbein, and G. Blatter

Phys. Rev. Research 2, 043266 (2020) - Published 20 November, 2020

The authors show that rare events in the form of small defect clusters dominate the pinning of the vortex lattice in a superconductor in the intermediate regime between weak collective and strong pinning.

From compact localized states to many-body scars in the random quantum comb

Oliver Hart, Giuseppe De Tomasi, and Claudio Castelnovo

Phys. Rev. Research 2, 043267 (2020) - Published 20 November, 2020

This work explores the behavior of quantum particles hopping on a comb-like lattice with structural disorder. The authors find a family of exact states with strictly zero localization length, which survive the addition of interactions.

Weyl points and exceptional rings with polaritons in bulk semiconductors

R. L. Mc Guinness and P. R. Eastham

Phys. Rev. Research 2, 043268 (2020) - Published 20 November, 2020

The authors compute the dispersion relation for exciton-polaritons in zinc-blende semiconductors, and find that it can contain Weyl points and rings of exceptional points.

Universal formalism for data sharing and processing in clock comparison networks

Jérôme Lodewyck, Rodolphe Le Targat, Paul-Eric Pottie, Erik Benkler, Sebastian Koke, and Jochen Kronjäger

Phys. Rev. Research 2, 043269 (2020) - Published 20 November, 2020

This work presents a mathematical framework for computing frequency ratios in large networks of optical and microwave atomic clocks, from a generic data sharing protocol. It is tailored to be used in continental-scale phase-compensated optical fiber links.

Eliminating the wave-function singularity for ultracold atoms by a similarity transformation

Péter Jeszenszki, Ulrich Ebling, Hongjun Luo, Ali Alavi, and Joachim Brand

Phys. Rev. Research 2, 043270 (2020) - Published 20 November, 2020

The authors propose a similarity transformation that removes a singularity in the wave function of many-body systems with contact interactions.

Statistical inference of assortative community structures

Lizhi Zhang and Tiago P. Peixoto

Phys. Rev. Research 2, 043271 (2020) - Published 23 November, 2020

The authors propose a Bayesian method to infer assortative community structures in networks, which avoids overfitting and the resolution limit problem.

Observation of electron cyclotron harmonic emissions due to electrostatic instabilities in mirror-confined plasma

B. Eliasson, M. Viktorov, D. C. Speirs, K. Ronald, D. Mansfeld, and A. D. R. Phelps

Phys. Rev. Research 2, 043272 (2020) - Published 23 November, 2020

The authors present observations of electromagnetic emissions near electron cyclotron harmonics from mirror-confined laboratory plasma during electron cyclotron resonance heating by microwaves, and attribute them to electron cyclotron instabilities.

Electron quasi-itinerancy intertwined with quantum order by disorder in pyrochlore iridate magnetism

Gang Chen and Xiaoqun Wang

Phys. Rev. Research 2, 043273 (2020) - Published 23 November, 2020

This work investigates the emergent magnetism from the interplay of electron quasi-itinerancy and quantum order by disorder in pyrochlore iridates.

Theory of inversion-Z4 protected topological chiral hinge states and its applications to layered antiferromagnets

Yutaro Tanaka, Ryo Takahashi, Tiantian Zhang, and Shuichi Murakami

Phys. Rev. Research 2, 043274 (2020) - Published 23 November, 2020

The authors show the configurations of hinge states in higher-order topological insulators with inversion symmetry and find a difference of hinge states between the cases with an even and odd number of layers in layered antiferromagnets.

Floquet-engineered topological flat bands in irradiated twisted bilayer graphene

Yantao Li, H. A. Fertig, and Babak Seradjeh

Phys. Rev. Research 2, 043275 (2020) - Published 23 November, 2020

The authors propose an optically tunable platform to create topological flat bands in twisted bilayer graphene using circularly polarized UV laser light.

Ultimate limits of approximate unambiguous discrimination

Quntao Zhuang

Phys. Rev. Research 2, 043276 (2020) - Published 23 November, 2020

The author proposes an approximate unambiguous discrimination scenario and derive its ultimate performance limits for both states and channels.

Critical Fermi surfaces in generic dimensions arising from transverse gauge field interactions

Ipsita Mandal

Phys. Rev. Research 2, 043277 (2020) - Published 23 November, 2020

This paper studies critical Fermi surfaces in generic dimensions arising from coupling finite-density fermions with transverse gauge fields by applying a dimensional regularization scheme.

Degenerate manifolds, helimagnets, and multi-Q chiral phases in the classical Heisenberg antiferromagnet on the face-centered-cubic lattice

Péter Balla, Yasir Iqbal, and Karlo Penc

Phys. Rev. Research 2, 043278 (2020) - Published 24 November, 2020

The authors identify triple points and phase boundaries in the classical phase diagram of the Heisenberg model on the face-centered cubic lattice where the Hamiltonian admits a completing of squares thereby giving rise to subextensively degenerate ground state manifolds with a variety of spin structures.

Light and heavy particles on a fluctuating surface: Bunchwise balance, irreducible sequences, and local density-height correlations

Samvit Mahapatra, Kabir Ramola, and Mustansir Barma

Phys. Rev. Research 2, 043279 (2020) - Published 24 November, 2020

The authors study the dynamics of a lattice model consisting of two species of hard core particles advecting and interacting with a fluctuating surface.

Memory-assisted decoder for approximate Gottesman-Kitaev-Preskill codes

Kwok Ho Wan, Alex Neville, and Steve Kolthammer

Phys. Rev. Research 2, 043280 (2020) - Published 24 November, 2020

The authors propose an explicit decoder for the approximate Gottesman-Kitaev-Preskill code. The scheme is formulated for multiple rounds of displacement error followed by syndrome extraction measurements and its error estimation is enhanced by considering all recorded syndromes.

Optical Hall response of bilayer graphene: Manifestation of chiral hybridized states in broken mirror symmetry lattices

V. Nam Do, H. Anh Le, V. Duy Nguyen, and D. Bercioux

Phys. Rev. Research 2, 043281 (2020) - Published 25 November, 2020

The authors study the optical Hall response of bilayer graphene under sliding and twisting and, based on symmetry arguments, explain the effects of Kerr and Faraday rotations as well as the circular dichroism.

Ring solitons and soliton sacks in imbalanced fermionic systems

Mats Barkman, Albert Samoilenka, Thomas Winyard, and Egor Babaev

Phys. Rev. Research 2, 043282 (2020) - Published 25 November, 2020

This paper demonstrates the existence of stable solitons in the form of nodal rings in imbalanced superfluids and superconductors. These solitons have nontrivial interactions and form composite structures, such as soliton sacks.

Electron pairing induced by repulsive interactions in tunable one-dimensional platforms

Gal Shavit and Yuval Oreg

Phys. Rev. Research 2, 043283 (2020) - Published 25 November, 2020

The authors show how tuning of strong repulsive interactions in one-dimensional systems may lead to the formation of electron pairs. They further explore the system’s phase diagram and extensions to higher dimensions.

Wrinkles, folds, and ripplocations: Unusual deformation structures of confined elastic sheets at nonzero temperatures

Debankur Das, Jürgen Horbach, Peter Sollich, Tanusri Saha-Dasgupta, and Surajit Sengupta

Phys. Rev. Research 2, 043284 (2020) - Published 25 November, 2020

The authors analyze the origin of multivalued height fluctuations, which describe the mechanical behavior of layered solids.

Black and white holes at material junctions

Yaron Kedem, Emil J. Bergholtz, and Frank Wilczek

Phys. Rev. Research 2, 043285 (2020) - Published 25 November, 2020

The authors show the analogies between the equations of motion of electrons at boundaries of certain materials and those which arise at black or white hole horizons.

Cold-source paradigm for steep-slope transistors based on van der Waals heterojunctions

D. Logoteta, J. Cao, M. Pala, P. Dollfus, Y. Lee, and G. Iannaccone

Phys. Rev. Research 2, 043286 (2020) - Published 30 November, 2020

This paper proposes a device for energy-efficient, steep-slope transistors based on heterojunctions of two-dimensional materials.

Generalized measure of quantum synchronization

Noufal Jaseem, Michal Hajdušek, Parvinder Solanki, Leong-Chuan Kwek, Rosario Fazio, and Sai Vinjanampathy

Phys. Rev. Research 2, 043287 (2020) - Published 30 November, 2020

The authors develop a method to quantifying synchronization in dissimilar quantum systems, and apply these techniques to finite and infinite dimensional systems.

Systems of random variables and the free will theorem

Ehtibar N. Dzhafarov and Janne V. Kujala

Phys. Rev. Research 2, 043288 (2020) - Published 30 November, 2020

The authors reformulate the Conway-Kochen theorem to show that individual particles are not deterministic, and explore the limitation of this result.

Variational quantum algorithm for nonequilibrium steady states

Nobuyuki Yoshioka, Yuya O. Nakagawa, Kosuke Mitarai, and Keisuke Fujii

Phys. Rev. Research 2, 043289 (2020) - Published 30 November, 2020

The authors propose a variational quantum algorithm to simulate the nonequilibrium steady state of open quantum systems by embedding mixed states into unitary circuits.

Quasinormal-mode theory of elastic Purcell factors and Fano resonances of optomechanical beams

Al-Waleed El-Sayed and Stephen Hughes

Phys. Rev. Research 2, 043290 (2020) - Published 30 November, 2020

The authors present a quasinormal mode theory of mechanical open-cavity modes, and apply it to optomechanical beam cavities.

Anomalous Lifshitz dimension in hierarchical networks of brain connectivity

Samaneh Esfandiary, Ali Safari, Jakob Renner, Paolo Moretti, and Miguel A. Muñoz

Phys. Rev. Research 2, 043291 (2020) - Published 30 November, 2020

This work introduces a framework to study the emergence of long time scales in network models of brain connectivity, and establishes a connection between anomalies in the spectral dimension and the emergence of Lifshitz tails in the Laplacian spectrum.

Active reset of a radiative cascade for entangled-photon generation beyond the continuous-driving limit

Jonathan R. A. Müller, R. Mark Stevenson, Joanna Skiba-Szymanska, Ginny Shooter, Jan Huwer, Ian Farrer, David A. Ritchie, and Andrew J. Shields

Phys. Rev. Research 2, 043292 (2020) - Published 30 November, 2020

The authors propose an early reset of the radiative cascade in atom-like quantum systems to enable the generation of entangled photon pairs at higher emission rates.

Dichotomy between orbital and magnetic nematic instabilities in BaFe2S3

S. Hosoi, T. Aoyama, K. Ishida, Y. Mizukami, K. Hashizume, S. Imaizumi, Y. Imai, K. Ohgushi, Y. Nambu, M. Kimata, S. Kimura, and T. Shibauchi

Phys. Rev. Research 2, 043293 (2020) - Published 30 November, 2020

The authors present the gradual orbital switching from leg-directed orbital order to rung-directed orbital order in the iron-based ladder superconductor BaFe2S3 using field-angle resolved magnetoresistance and elastoresistance measurements.

Full-dimensional quantum scattering calculations on ultracold atom-molecule collisions in magnetic fields: The role of molecular vibrations

Masato Morita, Jacek Kłos, and Timur V. Tscherbul

Phys. Rev. Research 2, 043294 (2020) - Published 30 November, 2020

The authors present quantum dynamics calculations on strongly anisotropic Li + CaH collisions at ultralow temperatures in the presence of an external magnetic field, and show the role of vibrational degrees of freedom in determining the properties of magnetic Feshbach resonances in ultracold atom-molecule collisions.

Ion and electron ghost imaging

A. Trimeche, C. Lopez, D. Comparat, and Y. J. Picard

Phys. Rev. Research 2, 043295 (2020) - Published 30 November, 2020

This work demonstrates ion and electron ghost imaging: two beams of correlated ions and electrons are used to image an object even when the detector placed behind this object has no spatial resolution.

Polaron spectral properties in doped ZnO and SrTiO3 from first principles

Gabriel Antonius, Yang-Hao Chan, and Steven G. Louie

Phys. Rev. Research 2, 043296 (2020) - Published 1 December, 2020

This paper studies electron-phonon coupling from first-principles using Green’s function methods.

Interferences between Bogoliubov excitations in superfluids of light

Quentin Fontaine, Pierre-Élie Larré, Giovanni Lerario, Tom Bienaimé, Simon Pigeon, Daniele Faccio, Iacopo Carusotto, Élisabeth Giacobino, Alberto Bramati, and Quentin Glorieux

Phys. Rev. Research 2, 043297 (2020) - Published 1 December, 2020

This work demonstrates the production of counter-propagating phonons due to an interaction quench in paraxial fluid of light.

Gravitational-wave astronomy with an uncertain noise power spectral density

Colm Talbot and Eric Thrane

Phys. Rev. Research 2, 043298 (2020) - Published 1 December, 2020

The authors propose alternative probability distributions arising in gravitational-wave data analysis and demonstrate how using these distributions affects gravitational-wave analysis.

Surfing and crawling macroscopic active particles under strong confinement: Inertial dynamics

Marco Leoni, Matteo Paoluzzi, Sarah Eldeen, Anthony Estrada, Lauren Nguyen, Maria Alexandrescu, Karin Sherb, and Wylie W. Ahmed

Phys. Rev. Research 2, 043299 (2020) - Published 1 December, 2020

This work studies the dynamics of inertial active particles under strong confinement and observe that he probability density of position peaks at a finite distance away from the confining wall, and that individual particles exhibit several dynamical states and transitions between them can be controlled by the level of self-propulsion.

Chiral Dirac superconductors: Second-order and boundary-obstructed topology

Apoorv Tiwari, Ammar Jahin, and Yuxuan Wang

Phys. Rev. Research 2, 043300 (2020) - Published 1 December, 2020

The paper shows that a two dimensional semimetal with four Dirac points subject to parity odd pairing delivers a higher-order superconductor that hosts Majorana corner states.

Criticality in amorphous topological matter: Beyond the universal scaling paradigm

Moein N. Ivaki, Isac Sahlberg, and Teemu Ojanen

Phys. Rev. Research 2, 043301 (2020) - Published 1 December, 2020

The authors propose a scaling theory of transport of two-dimensional topological insulators in random geometry and study its departure from the theory of topological phase transitions in disordered systems.

Hybrid thermal machines: Generalized thermodynamic resources for multitasking

Gonzalo Manzano, Rafael Sánchez, Ralph Silva, Géraldine Haack, Jonatan B. Brask, Nicolas Brunner, and Patrick P. Potts

Phys. Rev. Research 2, 043302 (2020) - Published 1 December, 2020

The authors develop a theory characterizing the function and performance of hybrid thermal machines.

Input-driven bifurcations and information processing capacity in spintronics reservoirs

Nozomi Akashi, Terufumi Yamaguchi, Sumito Tsunegi, Tomohiro Taniguchi, Mitsuhiro Nishida, Ryo Sakurai, Yasumichi Wakao, and Kohei Nakajima

Phys. Rev. Research 2, 043303 (2020) - Published 1 December, 2020

The authors find two types of input-driven bifurcation in the spin-torque oscillator, and they reveal the information processing capacity as a reservoir computing changes according to these bifurcations.

Sending-or-not-sending twin-field quantum key distribution with discrete-phase-randomized weak coherent states

Cong Jiang, Zong-Wen Yu, Xiao-Long Hu, and Xiang-Bin Wang

Phys. Rev. Research 2, 043304 (2020) - Published 1 December, 2020

The authors show the effect of the sending-or-not-sending twin-field protocol with only a few values of discrete phases for the weak coherent states.

From tunnels to towers: Quantum scars from Lie algebras and q-deformed Lie algebras

Nicholas O'Dea, Fiona Burnell, Anushya Chandran, and Vedika Khemani

Phys. Rev. Research 2, 043305 (2020) - Published 2 December, 2020

The authors present a framework for creating and understanding scar towers as shadows of broken non-Abelian symmetries and show examples of models hosting scar towers derived from higher-rank and q-deformed Lie algebras.

Outbreak diversity in epidemic waves propagating through distinct geographical scales

Guilherme S. Costa, Wesley Cota, and Silvio C. Ferreira

Phys. Rev. Research 2, 043306 (2020) - Published 2 December, 2020

The authors explore a metapopulation model for the spread of COVID-19 towards the countryside using a data-driven approach, and predict large diversity of epidemic curves across different geographical scales.

Dynamics of matter-wave quantum emitters in a structured vacuum

Michael Stewart, Joonhyuk Kwon, Alfonso Lanuza, and Dominik Schneble

Phys. Rev. Research 2, 043307 (2020) - Published 2 December, 2020

The authors study the dynamics of matter-wave quantum emitters coupled to the band structure of a periodic potential, in which bound states involving evanescent matter waves drive a transition from exponential decay to fully reversible oscillations.

Finding hidden order in spin models with persistent homology

Bart Olsthoorn, Johan Hellsvik, and Alexander V. Balatsky

Phys. Rev. Research 2, 043308 (2020) - Published 2 December, 2020

The authors show how persistent homology can function as an order parameter and uncover the phase diagram of classical spin models.

Synchronization malleability in neural networks under a distance-dependent coupling

R. C. Budzinski, K. L. Rossi, B. R. R. Boaretto, T. L. Prado, and S. R. Lopes

Phys. Rev. Research 2, 043309 (2020) - Published 2 December, 2020

This paper studies how a spiking neural network responds to changes in its inputs and shows that it is maximally sensitive in some region of the parameter space.

Quantum Jackiw-Teitelboim gravity, Selberg trace formula, and random matrix theory

Antonio M. García-García and Salomón Zacarías

Phys. Rev. Research 2, 043310 (2020) - Published 3 December, 2020

The authors show the quantum partition function for Jackiw-Teitelboim gravity in terms of the lengths of periodic orbits of two-dimensional Riemann surfaces of arbitrary genus.

Topological piezoelectric effect and parity anomaly in nodal line semimetals

Taiki Matsushita, Satoshi Fujimoto, and Andreas P. Schnyder

Phys. Rev. Research 2, 043311 (2020) - Published 3 December, 2020

The authors elucidate topological piezoelectric effect in nodal line semimetals, and show that ehe piezoelectric coefficient has a quantized value that can be associated with the quantized bulk electric polarization.

Skyrmionic interconnect device

Runze Chen, Yu Li, Vasilis F. Pavlidis, and Christoforos Moutafis

Phys. Rev. Research 2, 043312 (2020) - Published 3 December, 2020

This paper proposes a magnetic skyrmion-based interconnect device that encoded sequences of information by skyrmionic quasiparticles with distinct topology in a single device.

Electron-beam broadening in electron microscopy by solving the electron transport equation

Erich Müller, Milena Hugenschmidt, and Dagmar Gerthsen

Phys. Rev. Research 2, 043313 (2020) - Published 4 December, 2020

The authors calculate the propagation of electrons in matter in the context of scanning electron microscopy. They use the solution of the electron-transport equation to determine penetration depth, beam broadening, energy dissipation and angular distribution of the scattered electrons.

Escape problem for active particles confined to a disk

Kristian Stølevik Olsen, Luiza Angheluta, and Eirik Grude Flekkøy

Phys. Rev. Research 2, 043314 (2020) - Published 4 December, 2020

The authors study the escape of self-propelled particles inside a disc in the presence of alignment interactions between particles and observe a non-exponential survival probability described by a Poisson process.

Probing eigenstate thermalization in quantum simulators via fluctuation-dissipation relations

Alexander Schuckert and Michael Knap

Phys. Rev. Research 2, 043315 (2020) - Published 4 December, 2020

The authors provide protocols to probe thermalization in quantum simulators by two-time correlation functions, which characterize the off-diagonal part of the eigenstate thermalization hypothesis.

Effective temperature of a superfluid flowing in a random potential

Taiki Haga and Masahito Ueda

Phys. Rev. Research 2, 043316 (2020) - Published 4 December, 2020

The authors demonstrate that a superfluid flowing in a random potential can be identified with a uniform system at thermal equilibrium with an effective temperature due to random elastic scattering of the moving condensate by disorder.

Quantum magic rectangles: Characterization and application to certified randomness expansion

Sean A. Adamson and Petros Wallden

Phys. Rev. Research 2, 043317 (2020) - Published 4 December, 2020

The authors generalize the magic square game of Mermin and Peres to arbitrary rectangular dimensions, characterize the optimal quantum strategies, and apply these games in the context of quantum-certified randomness expansion.

Supersolidity in an elongated dipolar condensate

P. B. Blakie, D. Baillie, L. Chomaz, and F. Ferlaino

Phys. Rev. Research 2, 043318 (2020) - Published 4 December, 2020

The authors develop a theory to describe the emergence of a supersolid state in an elongated dipolar Bose gas and predict a phase diagram for the system over a wide parameter regime.

Optical shaping of plasma cavity for controlled laser wakefield acceleration

Bobbili Sanyasi Rao, Myung Hoon Cho, Hyung Taek Kim, Jung Hun Shin, Kyung Hwan Oh, Jong Ho Jeon, Byung Ju Yoo, Seong Ha Cho, Jin Woo Yoon, Jae Hee Sung, Seong Ku Lee, and Chang Hee Nam

Phys. Rev. Research 2, 043319 (2020) - Published 4 December, 2020

The authors show the generation of tailored sub-GeV electron beams from laser wakefield acceleration through optically shaped and rotatable plasma cavity.

Hydrodynamic attractor of a hybrid viscous fluid in Bjorken flow

Toshali Mitra, Sukrut Mondkar, Ayan Mukhopadhyay, Anton Rebhan, and Alexander Soloviev

Phys. Rev. Research 2, 043320 (2020) - Published 4 December, 2020

The authors establish the existence of a hydrodynamic attractor in a new class of hybrid models, whose solutions exhibit the hallmarks of bottom-up thermalization.

Fingerprint of low-scale leptogenesis in the primordial gravitational-wave spectrum

Simone Blasi, Vedran Brdar, and Kai Schmitz

Phys. Rev. Research 2, 043321 (2020) - Published 4 December, 2020

This paper studies the gravitational-wave signal emitted by a network of cosmic strings created during the early universe phase transition, and focuses on a particular region in parameter space that would lead to a modified expansion history of the Universe.

Efficient simulatability of continuous-variable circuits with large Wigner negativity

Laura García-Álvarez, Cameron Calcluth, Alessandro Ferraro, and Giulia Ferrini

Phys. Rev. Research 2, 043322 (2020) - Published 4 December, 2020

The authors show that certain families of continuous-variable quantum circuits based on bosonic codes can be classically simulated despite displaying large Wigner negativity.

Optimal verification of stabilizer states

Ninnat Dangniam, Yun-Guang Han, and Huangjun Zhu

Phys. Rev. Research 2, 043323 (2020) - Published 4 December, 2020

The authors derive ultimate limits on the efficiency of verifying quantum stabilizer states with local measurements, and based on the framework and present examples with Pauli measurements.

Seismic hazard due to fluid injections

Cole Lord-May, Jordi Baró, David W. Eaton, and Jörn Davidsen

Phys. Rev. Research 2, 043324 (2020) - Published 7 December, 2020

The authors propose a conceptual model combining stick-slip micromechanics with fluid propagation in diverse poromechanical settings, which highlights the role of criticality, finite-size effects and the loading history together with the heterogeneity of the crust at a given injection site.

Feedback induced magnetic phases in binary Bose-Einstein condensates

Hilary M. Hurst, Shangjie Guo, and I. B. Spielman

Phys. Rev. Research 2, 043325 (2020) - Published 7 December, 2020

The authors develop a protocol for quantum feedback control of multicomponent Bose-Einstein condensates using backaction-limited weak measurements and spatially resolved feedback.

Collective cell migration of epithelial cells driven by chiral torque generation

Takaki Yamamoto, Tetsuya Hiraiwa, and Tatsuo Shibata

Phys. Rev. Research 2, 043326 (2020) - Published 7 December, 2020

The authors develop a model of a confluent tissue in which each cell generates chiral torque, and show that those cells migrate unidirectionally under a gradient of the chiral torque strength.

Dipole-coupled emitters as deterministic entangled photon-pair sources

Derek S. Wang, Tomáš Neuman, and Prineha Narang

Phys. Rev. Research 2, 043328 (2020) - Published 7 December, 2020

The authors show that electric dipole-coupled emitters can deterministically emit entangled photon pairs. They estimate electric dipole coupling energies and characterize the generated entanglement.

Experimental realization of multipartite entanglement via quantum Fisher information in a uniform antiferromagnetic quantum spin chain

George Mathew, Saulo L. L. Silva, Anil Jain, Arya Mohan, D. T. Adroja, V. G. Sakai, C. V. Tomy, Alok Banerjee, Rajendar Goreti, Aswathi V. N., Ranjit Singh, and D. Jaiswal-Nagar

Phys. Rev. Research 2, 043329 (2020) - Published 7 December, 2020

This paper reports on the direct detection of multipartite entanglement in a quantum-many body system. The authors observe that quantum Fisher information survives to temperatures above the exchange coupling constant of the system.

Charge and thermoelectric transport mechanism in donor-acceptor copolymer films

Kaito Kanahashi, Yong-Young Noh, Won-Tae Park, Hoichang Yang, Hiromichi Ohta, Hisaaki Tanaka, and Taishi Takenobu

Phys. Rev. Research 2, 043330 (2020) - Published 7 December, 2020

The authors study charge transport and thermoelectric properties of donor-acceptor type conducting polymers under continuous electrochemical doping. Both properties are fully described by a variable-range hopping model due to the uniform transport process enabled by the highly-planar backbone conformation.

Design principles for biochemical oscillations with limited energy resources

Zhiyu Cao, Huijun Jiang, and Zhonghuai Hou

Phys. Rev. Research 2, 043331 (2020) - Published 7 December, 2020

The authors propose design principles for biochemical oscillations with limited energy resources that help finding the optimal system size in terms of sensitivity and accuracy.

Voltage drop across Josephson junctions for Lévy noise detection

Claudio Guarcello, Giovanni Filatrella, Bernardo Spagnolo, Vincenzo Pierro, and Davide Valenti

Phys. Rev. Research 2, 043332 (2020) - Published 7 December, 2020

The authors explore the response of a Josephson junction to unveil the properties of an unknown non-Gaussian noise source, investigating the voltage drop across the device.

Magnetic excitations in an ionic spin-chain system with a nonmagnetic ferroelectric instability

K. Sunami, Y. Sakai, R. Takehara, H. Adachi, K. Miyagawa, S. Horiuchi, and K. Kanoda

Phys. Rev. Research 2, 043333 (2020) - Published 7 December, 2020

The authors examine the spin excitations in an ionic spin-chain system withnonmagnetic ferroelectric instability and show a reduction in the spin susceptibility.

Analogies between growing dense active matter and soft driven glasses

Elsen Tjhung and Ludovic Berthier

Phys. Rev. Research 2, 043334 (2020) - Published 7 December, 2020

Nonaffine dynamics of growing dense active matter shows aging behavior, which can be understood by drawing analogies with soft driven passive glasses.

Mapping the XY Hamiltonian onto a network of coupled lasers

Mostafa Honari-Latifpour and Mohammad-Ali Miri

Phys. Rev. Research 2, 043335 (2020) - Published 8 December, 2020

This article shows how dissipatively coupled laser networks evolve toward minimizing a Lyapunov function that turns out to be asymptotically equivalent with the XY Hamiltonian in the strong pump regime.

From Luttinger liquids to Luttinger droplets via higher-order bosonization identities

Sebastian Huber and Marcus Kollar

Phys. Rev. Research 2, 043336 (2020) - Published 8 December, 2020

In this work the fermion-boson mapping used in the theory of Luttinger liquids is extended to nonzero momentum transfers.

Topologically protected states in a spider web lattice

J. P. Pino, P. Alves, J. D. Gouveia, A. M. Marques, and R. G. Dias

Phys. Rev. Research 2, 043337 (2020) - Published 8 December, 2020

The authors address topological radial states in a spider-web geometry with staggered hopping amplitudes. This system exhibits central edge states and has a mixed topological characterization that requires multiple weak topological invariants.

Mechanical oscillator thermometry in the nonlinear optomechanical regime

V. Montenegro, M. G. Genoni, A. Bayat, and M. G. A. Paris

Phys. Rev. Research 2, 043338 (2020) - Published 8 December, 2020

The authors provide a method to estimate the temperature of a mechanical oscillator by using light as a probe.

Observation of collective decay dynamics of a single Rydberg superatom

Nina Stiesdal, Hannes Busche, Jan Kumlin, Kevin Kleinbeck, Hans Peter Büchler, and Sebastian Hofferberth

Phys. Rev. Research 2, 043339 (2020) - Published 8 December, 2020

The authors study the emission of single photons from a collective atomic Rydberg excitation and observe variations in its decay rate that result from the collective state’s internal coherent dynamics.

Bose-Hubbard physics in synthetic dimensions from interaction Trotterization

L. Barbiero, L. Chomaz, S. Nascimbene, and N. Goldman

Phys. Rev. Research 2, 043340 (2020) - Published 8 December, 2020

The authors introduce a scheme to realize the Hubbard model using atoms on a single site and activating transitions between atomic internal states

Synchrotron radiation from ultrahigh-intensity laser-plasma interactions and competition with Bremsstrahlung in thin foil targets

B. Martinez, E. d'Humières, and L. Gremillet

Phys. Rev. Research 2, 043341 (2020) - Published 8 December, 2020

The authors study synchrotron and Bremsstrahlung emissions in foil targets irradiated by ultraintense, ultrashort laser pulses, and determine their prevalence on the basis of the target size.

Evolution of the N=20 and 28 shell gaps and two-particle-two-hole states in the FSU interaction

R. S. Lubna, K. Kravvaris, S. L. Tabor, Vandana Tripathi, E. Rubino, and A. Volya

Phys. Rev. Research 2, 043342 (2020) - Published 8 December, 2020

The authors present a empirical nuclear shell model interaction and use it to interpret the structure of the sd-shell nuclei.

Rectification in nonequilibrium steady states of open many-body systems

Kazuki Yamamoto, Yuto Ashida, and Norio Kawakami

Phys. Rev. Research 2, 043343 (2020) - Published 8 December, 2020

This work studies how translationally invariant homogeneous couplings between many-particle systems and nonequilibrium baths can be used to rectify particle currents.

Magnetic polarons and spin-glass behavior in insulating La1xSrxCoO3 (x=0.125 and 0.15)

P. Anil Kumar, Abhishek Nag, Roland Mathieu, Ranjan Das, Sugata Ray, Per Nordblad, Akmal Hossain, Dona Cherian, Diego Alba Venero, Lisa DeBeer-Schmitt, Olof Karis, and D. D. Sarma

Phys. Rev. Research 2, 043344 (2020) - Published 8 December, 2020

This article presents experimental magnetic data to show the existence of magnetic polarons far above the spin-glass ordering temperature in Sr doped LaCoO3. These polarons grow in size as the temperature approaches the ordering temperature.

Structure of quantum entanglement at a finite temperature critical point

Tsung-Cheng Lu and Tarun Grover

Phys. Rev. Research 2, 043345 (2020) - Published 9 December, 2020

The authors propose a scheme to characterize quantum entanglement close to a finite temperature critical point using an entanglement measure for mixed states. They show that despite a diverging correlation length at the critical point, the entanglement is only short-ranged.

Fragile extended phases in the log-normal Rosenzweig-Porter model

I. M. Khaymovich, V. E. Kravtsov, B. L. Altshuler, and L. B. Ioffe

Phys. Rev. Research 2, 043346 (2020) - Published 9 December, 2020

This paper studies a model with multifractal wave functions and fractal mini-bands which allows for analytical derivation of its phase diagram

Self-force on moving electric and magnetic dipoles: Dipole radiation, Vavilov-Čerenkov radiation, friction with a conducting surface, and the Einstein-Hopf effect

Kimball A. Milton, Hannah Day, Yang Li, Xin Guo, and Gerard Kennedy

Phys. Rev. Research 2, 043347 (2020) - Published 9 December, 2020

This paper studies the classical electromagnetic self-force on a moving dipole, in vacuum and in a medium, the resulting dipole and Vavilov-Čerenkov radiation, as well as the the quantum black-body friction on a polarizable particle moving in vacuum.

Photodissociation dynamics of the NH molecule under intense VUV pulses

Yan Rong Liu, Yong Wu, Jian Guo Wang, Oriol Vendrell, Victor Kimberg, and Song Bin Zhang

Phys. Rev. Research 2, 043348 (2020) - Published 9 December, 2020

The authors show the role of the electron-rotation coupling for the photodissociation dynamics of 3Σ - 3Π transitions, triggered by both resonant and detuned intense pulses.

Light trapping by arbitrarily thin cavities

Tilek Zhumabek and Constantinos Valagiannopoulos

Phys. Rev. Research 2, 043349 (2020) - Published 9 December, 2020

The authors propose a design, based on layered structures, to trap incoming light.

Hyperentanglement in structured quantum light

Francesco Graffitti, Vincenzo D'Ambrosio, Massimiliano Proietti, Joseph Ho, Bruno Piccirillo, Corrado de Lisio, Lorenzo Marrucci, and Alessandro Fedrizzi

Phys. Rev. Research 2, 043350 (2020) - Published 9 December, 2020

The authors implement a scheme for generating and characterizing hyperentangled quantum states of spectrally and spatially structured light.

Collinear laser spectroscopy of Ca+: Solving the field-shift puzzle of the 4sS1/224pP1/2,3/22 transitions

Patrick Müller, Kristian König, Phillip Imgram, Jörg Krämer, and Wilfried Nörtershäuser

Phys. Rev. Research 2, 043351 (2020) - Published 9 December, 2020

The paper show an application of collinear laser spectroscopy by studying the field-shifts of two optical dipole transitions in Ca+.

Emergence of complex socioeconomic networks driven by individual and collective interests

Jaime Iranzo, Federico Pablo-Martí, and Jacobo Aguirre

Phys. Rev. Research 2, 043352 (2020) - Published 9 December, 2020

The authors propose a theoretical framework that explains social hierarchy and economic inequality in a variety of real-world scenarios.

Quantum coherence enfeebled by classical uncertainties

R. O. Barrachina, F. Navarrete, and M. F. Ciappina

Phys. Rev. Research 2, 043353 (2020) - Published 10 December, 2020

This paper studies how classical uncertainties in a mixture of similar states reduce quantum coherence in quantum scattering theory.

From orbital to Pauli-limited critical fields in granular aluminum films

Aviv Glezer Moshe, Eli Farber, and Guy Deutscher

Phys. Rev. Research 2, 043354 (2020) - Published 10 December, 2020

The paper shows that, in high resistivity granular aluminum films the transition from the superconducting to the normal state becomes of first order at low temperatures.

Spreading nonlocality in a quantum network

Ratul Banerjee, Srijon Ghosh, Shiladitya Mal, and Aditi Sen(De)

Phys. Rev. Research 2, 043355 (2020) - Published 10 December, 2020

The authors propose a measurement-based method to share resource states in pre-decided nodes of a network, and test it in multipartite Bell-type inequalities.

One-dimensional nexus objects, network of Kibble-Lazarides-Shafi string walls, and their spin dynamic response in polar-distorted B-phase of He3

K. Zhang

Phys. Rev. Research 2, 043356 (2020) - Published 10 December, 2020

This work shows how topological objects connect to each other by the method of relative homotopy groups. The Kibble-Lazarides-Shafi string wall is shown to connect with soliton and forms nexus network in Helium-3 superfluid experimentally.

Zero-point magnetic exchange interactions

Juba Bouaziz, Julen Ibañez-Azpiroz, Filipe S. M. Guimarães, and Samir Lounis

Phys. Rev. Research 2, 043357 (2020) - Published 10 December, 2020

The authors propose a first principles theory to the magnetic exchange interactions incorporating the zero-point spin fluctuations contribution.

Statistical physics of discovering exogenous and endogenous factors in a chain of events

Shinsuke Koyama and Shigeru Shinomoto

Phys. Rev. Research 2, 043358 (2020) - Published 14 December, 2020

The authors develop a method for estimating exogenous and endogenous factors in a given series of event times, and show four regimes categorized according to whether or not exogenous fluctuations and endogenous chain-reaction mechanisms are detectable.

Activity-controlled clogging and unclogging of microchannels

L. Caprini, F. Cecconi, C. Maggi, and U. Marini Bettolo Marconi

Phys. Rev. Research 2, 043359 (2020) - Published 11 December, 2020

This article proposes a mechanism to control the formation of stable obstructions in micro-channels using the non-equilibrium clustering of active matter.

Autocorrected off-axis holography of two-dimensional materials

Felix Kern, Martin Linck, Daniel Wolf, Nasim Alem, Himani Arora, Sibylle Gemming, Artur Erbe, Alex Zettl, Bernd Büchner, and Axel Lubk

Phys. Rev. Research 2, 043360 (2020) - Published 11 December, 2020

The authors developed a parameter-free technique to correct for the aberrations of a transmission electron microscope by employing symmetries of electron wave function, reconstructed via electron holography.

Many-electron calculations of the phase stability of ZrO2 polymorphs

Wernfried Mayr-Schmölzer, Jakub Planer, Josef Redinger, Andreas Grüneis, and Florian Mittendorfer

Phys. Rev. Research 2, 043361 (2020) - Published 11 December, 2020

The authors show the shortcomings of density functional theory to produce a coherent description of theground state properties of ZrO2 polymorphs and show an alternative scheme using high-level many-electron methods.

Acoustic metasurface by layered concentric structures

Shanjun Liang, Tuo Liu, He Gao, Zhongming Gu, Shuowei An, and Jie Zhu

Phys. Rev. Research 2, 043362 (2020) - Published 11 December, 2020

This work proposes a concentrically layered arrangement of helical-structured metamaterials to simplify the design and construction of acoustic metasurfaces for three-dimensional wave-front modulation, in which the gradient helicoids inside the building blocks broaden the operating frequency range due to an enhanced impedance matching

Statistical learnability of nuclear masses

A. Idini

Phys. Rev. Research 2, 043363 (2020) - Published 14 December, 2020

This work uses statistical theory of learning and neural networks to infer the limitations of nuclear mass models and density functionals.

Expressibility and trainability of parametrized analog quantum systems for machine learning applications

Jirawat Tangpanitanon, Supanut Thanasilp, Ninnat Dangniam, Marc-Antoine Lemonde, and Dimitris G. Angelakis

Phys. Rev. Research 2, 043364 (2020) - Published 14 December, 2020

The authors study how analog quantum devices may use quantum many-body phases in machine learning

Many-electron effects of strong-field ionization described in an exact one-electron theory

Jakub Kocák and Axel Schild

Phys. Rev. Research 2, 043365 (2020) - Published 14 December, 2020

The authors discuss how many-electron effects during strong laser-matter interaction manifest in a one-electron representation.

Pressure controlled trimerization for switching of anomalous Hall effect in triangular antiferromagnet Mn3Sn

Charanpreet Singh, Vikram Singh, Gyandeep Pradhan, Velaga Srihari, Himanshu Kumar Poswal, Ramesh Nath, Ashis K. Nandy, and Ajaya K. Nayak

Phys. Rev. Research 2, 043366 (2020) - Published 14 December, 2020

This work demonstrates pressure induced switching of anomalous Hall effect governed by trimerization of Mn moments arranged in a triangular antiferromagnetic configuration.

Thermodynamic evolution theorem for chemical reactions

David Hochberg and Josep M. Ribó

Phys. Rev. Research 2, 043367 (2020) - Published 14 December, 2020

The authors show that chemical affinities evolve in time to minimize the sum of the entropy production and the exchange entropy for chemical reactions taking place in a continuous-flow stirred tank reactor.

Quasi-many-body localization of interacting fermions with long-range couplings

S. J. Thomson and M. Schiró

Phys. Rev. Research 2, 043368 (2020) - Published 14 December, 2020

This work characterizes many-body localization in disordered quantum systems with long-range couplings. Using a flow equation approach, the authors construct the local integrals of motion and study the nonequilibrium dynamics following a quantum quench.

Bridging dynamic regimes of segmental relaxation and center-of-mass diffusion in associative protein hydrogels

Ameya Rao, Helen Yao, and Bradley D. Olsen

Phys. Rev. Research 2, 043369 (2020) - Published 14 December, 2020

The authors use neutron spin-echo spectroscopy and forced Rayleigh scattering to study the interplay between conformational fluctuations and transient binding in associative protein hydrogels.

Binary-state dynamics on complex networks: Stochastic pair approximation and beyond

A. F. Peralta and R. Toral

Phys. Rev. Research 2, 043370 (2020) - Published 14 December, 2020

The authors develop a stochastic formalism for compartmental approaches used to study the dynamics of general binary-state models on networks.

Reduced phase space of heat-carrying acoustic phonons in single-crystalline InTe

Shantanu Misra, Céline Barreteau, Jean-Claude Crivello, Valentina M. Giordano, John-Paul Castellan, Yvan Sidis, Petr Levinský, Jiří Hejtmánek, Bernard Malaman, Anne Dauscher, Bertrand Lenoir, Christophe Candolfi, and Stéphane Pailhès

Phys. Rev. Research 2, 043371 (2020) - Published 14 December, 2020

The authors explore the origin of the low lattice thermal conductivity in the chalcogenide InTe using lattice dynamics calculations and inelastic neutron scattering experiments on a Bridgman-grown single crystal.

From weak to strong: Constrained extrapolation of perturbation series with applications to dilute Fermi systems

C. Wellenhofer, D. R. Phillips, and A. Schwenk

Phys. Rev. Research 2, 043372 (2020) - Published 14 December, 2020

This work develops a method for extrapolating a perturbation series from weak to strong coupling using low-order constraints from the strong-coupling regime.

Elasticity and dynamics of uniaxial nematic liquid crystal with defects: Nemator model

Natalie Aryasova and Sergij V. Shiyanovskii

Phys. Rev. Research 2, 043373 (2020) - Published 15 December, 2020

The authors introduce a nemator model of static and dynamic properties of uniaxial nematic liquid crystals based on the variable-length vector, which defines both the director and the order parameter.

Coherence cost for violating conservation laws

Hiroyasu Tajima, Naoto Shiraishi, and Keiji Saito

Phys. Rev. Research 2, 043374 (2020) - Published 15 December, 2020

The authors extend the Wigner-Araki-Yanase theorem and establish a condition for the amount of coherence to implement a general unitary gate under conservation laws.

Numerical study of anomalous diffusion of light in semicrystalline polymer structures

E. G. Kostadinova, J. L. Padgett, C. D. Liaw, L. S. Matthews, and T. W. Hyde

Phys. Rev. Research 2, 043375 (2020) - Published 15 December, 2020

This work presents a model for studying anomalous diffusion using methods from fractional calculus and spectral theory. The authors show that the combination of random structural disorder and non-local interactions can result in energy transport in semi-crystalline polymers.

Continuous quantum measurement for general Gaussian unravelings can exist

Nina Megier, Walter T. Strunz, and Kimmo Luoma

Phys. Rev. Research 2, 043376 (2020) - Published 15 December, 2020

The authors present a condition for the existence of a time-continuous measurement interpretation for the general non-Markovian Gaussian stochastic Schrödinger equation.

Large molasses-like cooling forces for molecules using polychromatic optical fields: A theoretical description

Konrad Wenz, Ivan Kozyryev, Rees L. McNally, Leland Aldridge, and Tanya Zelevinsky

Phys. Rev. Research 2, 043377 (2020) - Published 15 December, 2020

The authors propose using polychromatic laser radiation as a mechanism for laser cooling of atoms and molecules with complex level structures.

Generalized description of the nonlinear optical force in laser trapping of dielectric nanoparticles

Anita Devi and Arijit K. De

Phys. Rev. Research 2, 043378 (2020) - Published 16 December, 2020

The paper shows how laser trapping efficiencies of dielectric nanoparticles with varying refractive indices are strongly modulated under femtosecond pulsed excitation owing to optical Kerr effect.

Analytical and cellular automaton approach to a generalized SEIR model for infection spread in an open crowded space

Andrea Nava, Alessandro Papa, Marco Rossi, and Domenico Giuliano

Phys. Rev. Research 2, 043379 (2020) - Published 16 December, 2020

The authors formulate a generalized SEIR model on a graph, describing infection spread in an open crowded place with an arbitrary topology.

Scanning gate microscopy of localized states in a gate-defined bilayer graphene channel

Carolin Gold, Annika Kurzmann, Kenji Watanabe, Takashi Taniguchi, Klaus Ensslin, and Thomas Ihn

Phys. Rev. Research 2, 043380 (2020) - Published 16 December, 2020

This work studies the potential landscape in a 50nm-wide, gate-defined channel in encapsulated bilayer graphene on a local scale. The authors image the formation of localized states and study their position as well as their dependence on the displacement-field induced band-gap.

Monte Carlo approach to model COVID-19 deaths and infections using Gompertz functions

Tulio Rodrigues and Otaviano Helene

Phys. Rev. Research 2, 043381 (2020) - Published 16 December, 2020

This work uses Gompertz functions to describe the evolution of COVID-19 infections and a Monte Carlo algorithm to achieve the model best-fit parameters.

Elastocapillary network model of inhalation

Jean-François Louf, Felix Kratz, and Sujit S. Datta

Phys. Rev. Research 2, 043382 (2020) - Published 16 December, 2020

The authors develop a computational model of the lungs as a hierarchical, branched network of connected liquid-lined flexible cylinders. Using this model, they demonstrate how changes in biomechanical parameters alter inhaled lung capacity and breathing duration.

Characterization of helical Luttinger liquids in microwave stepped-impedance edge resonators

Alexandre Gourmelon, Hiroshi Kamata, Jean-Marc Berroir, Gwendal Fève, Bernard Plaçais, and Erwann Bocquillon

Phys. Rev. Research 2, 043383 (2020) - Published 17 December, 2020

The authors propose micron-scale microwave resonators to characterize interactions between edge states of a quantum spin Hall insulator, inspired by stepped-impedance resonators commonly-used in acoustics or microwaves.

Magnetization plateaux cascade in the frustrated quantum antiferromagnet Cs2CoBr4

K. Yu. Povarov, L. Facheris, S. Velja, D. Blosser, Z. Yan, S. Gvasaliya, and A. Zheludev

Phys. Rev. Research 2, 043384 (2020) - Published 17 December, 2020

The authors report a frustration scenario in a quasi two-dimensional quantum antiferromagnetic materials. The competition of frustration mechanisms related to both the exchange geometry and the ionic anisotropies results in a phase diagram with several magnetization plateaux.

Universal force correlations in an RNA-DNA unzipping experiment

Kay Jörg Wiese, Mathilde Bercy, Lena Melkonyan, and Thierry Bizebard

Phys. Rev. Research 2, 043385 (2020) - Published 17 December, 2020

The authors compare theoretical predictions for the depinning transition to experimental results for peeling of a RNA-DNA helix and use it as a test of the functional renormalization group for disordered systems.

Field and anisotropy driven transformations of spin spirals in cubic skyrmion hosts

A. O. Leonov, C. Pappas, and I. Kézsmárki

Phys. Rev. Research 2, 043386 (2020) - Published 17 December, 2020

The authors discuss several features of spiral states in bulk chiral magnets such as MnSi and Cu2OSeO3 that stem from the effect of the cubic magneto-crystalline anisotropy and could be imprinted on the functionalities of isolated chiral skyrmions.

Overcoming decoherence of Schrödinger cat states formed in a cavity using squeezed-state inputs

R. Y. Teh, P. D. Drummond, and M. D. Reid

Phys. Rev. Research 2, 043387 (2020) - Published 17 December, 2020

This work shows how squeezed states combat decoherence and enhance the quality of Schrodinger cat states in a cavity.

Thermoelectric detection of Andreev states in unconventional superconductors

Tony Savander, Shun Tamura, Christian Flindt, Yukio Tanaka, and Pablo Burset

Phys. Rev. Research 2, 043388 (2020) - Published 18 December, 2020

The authors show that a thermoelectric current in ferromagnet-superconductor junctions flows due to Andreev processes and is sensitive to surface states arising in unconventional superconductors, changing sign in their presence.

Modeling resistive switching in nanogranular metal films

Walter Tarantino and Luciano Colombo

Phys. Rev. Research 2, 043389 (2020) - Published 18 December, 2020

The authors describe the resistive switching of cluster-assembled metallic films using an effective medium approximation and calculate the resistance in a stochastic framework.

Nonanalytic nonequilibrium field theory: Stochastic reheating of the Ising model

Camille Aron and Manas Kulkarni

Phys. Rev. Research 2, 043390 (2020) - Published 18 December, 2020

The authors use a nonequilibrium version of the Ising model to show how nonanalytic terms, of intrinsic nonequilibrium nature, can deform the equilibrium φ4 theory.

Aerial mucosalivary droplet dispersal distributions with implications for disease mitigation

Brian Chang, Ram Sudhir Sharma, Trinh Huynh, and Arshad Kudrolli

Phys. Rev. Research 2, 043391 (2020) - Published 18 December, 2020

The authors show a hundred-fold reduction in liquid dispersed when a standard nose and mouth mask is worn, and a complete cancellation by N95 masks.

Absence of superconducting dome at the charge-density-wave quantum phase transition in 2HNbSe2

Owen Moulding, Israel Osmond, Felix Flicker, Takaki Muramatsu, and Sven Friedemann

Phys. Rev. Research 2, 043392 (2020) - Published 18 December, 2020

This study shows that superconductivity in NbSe2 is suppressed by the charge-density-wave order and finds evidence for a first-order transition of the charge density wave at high pressures.

Crystallization of magnetic skyrmions in MnSi investigated by neutron spin echo spectroscopy

Taro Nakajima, Tatsuro Oda, Masahiro Hino, Hitoshi Endo, Kazuki Ohishi, Kazuhisa Kakurai, Akiko Kikkawa, Yasujiro Taguchi, Yoshinori Tokura, and Taka-hisa Arima

Phys. Rev. Research 2, 043393 (2020) - Published 18 December, 2020

The authors study crystallization process of magnetic skyrmions in a chiral magnet MnSi by means of a resonance-type neutron spin echo spectroscopy in a magnetic field, and find that the skyrmions aggregate into small static triangular-lattice domains near the critical temperature.

Anomalous Hall effect in antiferromagnetic/nonmagnetic interfaces

M. Asa, C. Autieri, R. Pazzocco, C. Rinaldi, W. Brzezicki, A. Stroppa, M. Cuoco, G. Varvaro, S. Picozzi, and M. Cantoni

Phys. Rev. Research 2, 043394 (2020) - Published 21 December, 2020

The authors show that interfacial magnetic moments can be induced when a Pt layer is interfaced with an antiferromagnetic Cr film. The resulting modification allows the detection of an anomalous Hall signal dependent on the state of the antiferromagnet.

Interplay of disorder and interactions in a flat-band supporting diamond chain

Nilanjan Roy, Ajith Ramachandran, and Auditya Sharma

Phys. Rev. Research 2, 043395 (2020) - Published 21 December, 2020

The authors study the effect of disorder and interactions on a quasi one-dimensional diamond chain possessing flat bands, uncovering the presence of ergodic and nonergodic phases.

Electron pairing in the quantum Hall regime due to neutralon exchange

Giovanni A. Frigeri and Bernd Rosenow

Phys. Rev. Research 2, 043396 (2020) - Published 21 December, 2020

The authors discuss an electron-pairing mechanism in quantum Hall interferometers that enhances the Fano factor twofold for strong repulsive interactions.

Photoinduced renormalization and electronic screening of quasi-two-dimensional Dirac states in BaNiS2

N. Nilforoushan, M. Casula, M. Caputo, E. Papalazarou, J. Caillaux, Z. Chen, L. Perfetti, A. Amaricci, D. Santos-Cottin, Y. Klein, A. Gauzzi, and M. Marsi

Phys. Rev. Research 2, 043397 (2020) - Published 21 December, 2020

This work shows how ultrafast light pulses can induce a transient reduction of the Fermi velocity of Dirac fermions using a scaling relation between inverse screening length and electronic temperature.

Hierarchical mean-field T operator bounds on electromagnetic scattering: Upper bounds on near-field radiative Purcell enhancement

Sean Molesky, Pengning Chao, and Alejandro W. Rodriguez

Phys. Rev. Research 2, 043398 (2020) - Published 21 December, 2020

This paper uses localized spatial clusters constraints to show how the definition of the T operator can be used to generate hierarchies of increasingly accurate fundamental limits on wave scattering phenomena.

Fast scrambling without appealing to holographic duality

Zehan Li, Sayan Choudhury, and W. Vincent Liu

Phys. Rev. Research 2, 043399 (2020) - Published 21 December, 2020

This work examines the out-of-equilibrium dynamics of a nonintegrable spin chain with competing short and long range interactions and shows that this model can exhibit fast scrambling, even though it is not known to be dual to a black hole.

Single-bubble dynamics in nanopores: Transition between homogeneous and heterogeneous nucleation

Soumyadeep Paul, Wei-Lun Hsu, Mirco Magnini, Lachlan R. Mason, Ya-Lun Ho, Omar K. Matar, and Hirofumi Daiguji

Phys. Rev. Research 2, 043400 (2020) - Published 21 December, 2020

The authors study Joule-heating-induced bubble nucleation by analyzing ionic current blockages in a cylindrical nanopore and demonstrate that the periodic homogeneous nucleation transitions into a non-periodic mixture of homo- and heterogeneous nucleation as the pore diameter is increased.

Skew-scattering-induced giant antidamping spin-orbit torques: Collinear and out-of-plane Edelstein effects at two-dimensional material/ferromagnet interfaces

Frederico Sousa, Gen Tatara, and Aires Ferreira

Phys. Rev. Research 2, 043401 (2020) - Published 22 December, 2020

The authors investigate the role of scattering-dependent mechanisms in the generation of magnetic torques at two-dimensional material/ferromagnet bilayers.

Data-driven selection of coarse-grained models of coupled oscillators

Jordan Snyder, Anatoly Zlotnik, and Andrey Y. Lokhov

Phys. Rev. Research 2, 043402 (2020) - Published 22 December, 2020

This paper introduces a data-driven method for constructing reduced-order closure models for complex dynamical systems. The authors illustrate their approach by inferring precise coarse-grained network models of coupled oscillators.

Statistics of the spectral form factor in the self-dual kicked Ising model

Ana Flack, Bruno Bertini, and Tomaž Prosen

Phys. Rev. Research 2, 043403 (2020) - Published 22 December, 2020

The authors study the moments of the spectral form factor for the self-dual kicked Ising model and identify the corresponding ensembles of random matrices reproducing the results.

Closure of the entanglement gap at quantum criticality: The case of the quantum spherical model

Sascha Wald, Raúl Arias, and Vincenzo Alba

Phys. Rev. Research 2, 043404 (2020) - Published 22 December, 2020

The authors study the entanglement spectrum of the two-dimensional quantum spherical model in the vicinity of a quantum phase transition, and characterize the associated closing of the entanglement gap.

Lattice dynamics in the double-helix antiferromagnet FeP

A. S. Sukhanov, S. E. Nikitin, M. S. Pavlovskii, T. C. Sterling, N. D. Andryushin, A. S. Cameron, Y. V. Tymoshenko, H. C. Walker, I. V. Morozov, I. O. Chernyavskii, S. Aswartham, D. Reznik, and D. S. Inosov

Phys. Rev. Research 2, 043405 (2020) - Published 22 December, 2020

The authors use neutron spectroscopy and first-principle calculations to map out the phonon dispersions of FeP over the entire Brillouin zone.

Low energy dissipation readout of single-molecule ferroelectronic states by a spin-Seebeck signal

Hua-Hua Fu, Dan-Dan Wu, Gui-Fang Du, Qing-Bo Liu, and Menghao Wu

Phys. Rev. Research 2, 043406 (2020) - Published 22 December, 2020

The authors propose a mechanism to read single-molecule ferroelectric states using their interplay with electrons’ spin in the presence of temperature gradient.

Energy-scale cascade and correspondence between Mott and Kondo lattice physics

Danqing Hu, Ning-Hua Tong, and Yi-feng Yang

Phys. Rev. Research 2, 043407 (2020) - Published 22 December, 2020

The authors propose a correspondence of the characteristic energy scales in the Hubbard model and the periodic Anderson model, reflecting an intrinsic two-stage process of their quasiparticle dynamics to build up the lattice coherence for correlated electrons.

Floquet dynamics in light-driven solids

M. Nuske, L. Broers, B. Schulte, G. Jotzu, S. A. Sato, A. Cavalleri, A. Rubio, J. W. McIver, and L. Mathey

Phys. Rev. Research 2, 043408 (2020) - Published 22 December, 2020

This work discusses the transport properties of light-induced electronic Floquet states in solids. The authors provide an interpretation of the Hall conductivity in periodically driven graphene as a geometric-dissipative effect.

Kerker effect, superscattering, and scattering dark states in atomic antennas

Rasoul Alaee, Akbar Safari, Vahid Sandoghdar, and Robert W. Boyd

Phys. Rev. Research 2, 043409 (2020) - Published 22 December, 2020

The authors show that by arranging atoms or scatterers in subwavelength geometries, it is possible to control the scattering of the impinging photons.

First-principles approach with a pseudohybrid density functional for extended Hubbard interactions

Sang-Hoon Lee and Young-Woo Son

Phys. Rev. Research 2, 043410 (2020) - Published 23 December, 2020

The authors develop a first-principles computational method using pseudohybrid type functionals for the on- and inter-site Hubbard interactions and compare it to GW methods.

Quantum frequency locking and downconversion in a driven qubit-cavity system

Frederik Nathan, Gil Refael, Mark S. Rudner, and Ivar Martin

Phys. Rev. Research 2, 043411 (2020) - Published 23 December, 2020

The authors show that the external driving of a qubit-cavity system can cause its oscillations to lock to a rational multiple of the driving frequency and to the formation of multiplets of quasienergy levels.

Error-correction and noise-decoherence thresholds for coherent errors in planar-graph surface codes

F. Venn and B. Béri

Phys. Rev. Research 2, 043412 (2020) - Published 23 December, 2020

This work shows how to obtain Majorana fermion representations of planar-graph surface codes, how to use these representations to simulate coherent errors, and explores the relations between graph structure and error-correcting performance.

Unified ballistic transport relation for anisotropic dispersions and generalized dimensions

Jashan Singhal and Debdeep Jena

Phys. Rev. Research 2, 043413 (2020) - Published 23 December, 2020

The authors propose a method to calculate the quantum statistical and ballistic transport properties of fermions and bosons in generalized dimensions and for anisotropic dispersions.

Fragile topology in line-graph lattices with two, three, or four gapped flat bands

Christie S. Chiu, Da-Shuai Ma, Zhi-Da Song, B. Andrei Bernevig, and Andrew A. Houck

Phys. Rev. Research 2, 043414 (2020) - Published 23 December, 2020

The authors present a theoretical formalism to determine the band topology of flat bands in line-graph lattices, identifying families of lattices with fragile-topological flat bands.

Real-time estimation of the optically detected magnetic resonance shift in diamond quantum thermometry toward biological applications

Masazumi Fujiwara, Alexander Dohms, Ken Suto, Yushi Nishimura, Keisuke Oshimi, Yoshio Teki, Kai Cai, Oliver Benson, and Yutaka Shikano

Phys. Rev. Research 2, 043415 (2020) - Published 24 December, 2020

The authors show the onset of artifact sources in nanoscale temperature measurement using diamond nitrogen vacancy centers, and propose a method to minimize them.

Transparent mirror effect in twist-angle-disordered bilayer graphene

Sandeep Joy, Saad Khalid, and Brian Skinner

Phys. Rev. Research 2, 043416 (2020) - Published 24 December, 2020

The authors investigate the effect of spatial fluctuations of the twist angle in twisted bilayer graphene, using a quasi-one-dimensional model of the disorder. The corresponding electron conductance can be understood by analogy with the physics of transparent mirrors with a modification due to Klein tunneling.

Charge symmetry broken complex coacervation

Arghya Majee, Markus Bier, Ralf Blossey, and Rudolf Podgornik

Phys. Rev. Research 2, 043417 (2020) - Published 24 December, 2020

The authors show that charge regulation in a macroion system can induce equilibrium phase separation via a charge-symmetry breaking mechanism.

Atomic spin-wave control and spin-dependent kicks with shaped subnanosecond pulses

Yizun He, Lingjing Ji, Yuzhuo Wang, Liyang Qiu, Jian Zhao, Yudi Ma, Xing Huang, Saijun Wu, and Darrick E. Chang

Phys. Rev. Research 2, 043418 (2020) - Published 24 December, 2020

This work shows a method to shift optical spin waves in k space by applying spin-dependent geometric forces to laser-cooled atoms.

Reservoir engineering for maximally efficient quantum engines

Taysa M. Mendonça, Alexandre M. Souza, Rogério J. de Assis, Norton G. de Almeida, Roberto S. Sarthour, Ivan S. Oliveira, and Celso J. Villas-Boas

Phys. Rev. Research 2, 043419 (2020) - Published 24 December, 2020

The authors build artificial thermal baths at arbitrary temperatures for a single spin system and apply them to devise a cyclic quantum engine that operates under a single reservoir at negative effective temperature.

Quantum Zeno effect with partial measurement and noisy dynamics

Parveen Kumar, Alessandro Romito, and Kyrylo Snizhko

Phys. Rev. Research 2, 043420 (2020) - Published 24 December, 2020

The authors study the quantum Zeno effect induced by continuous partial measurement in the presence of short-correlated noise in the system Hamiltonian.

Entanglement dynamics in dispersive optomechanics: Nonclassicality and revival

Igor Brandão, Bruno Suassuna, Bruno Melo, and Thiago Guerreiro

Phys. Rev. Research 2, 043421 (2020) - Published 28 December, 2020

The authors explore the entanglement dynamics, nonclassicality, and non-Markovianity of a system comprising two optical modes interacting dispersively with a mechanical oscillator.

Wavefront shaping with a tunable metasurface: Creating cold spots and coherent perfect absorption at arbitrary frequencies

Benjamin W. Frazier, Thomas M. Antonsen, Jr., Steven M. Anlage, and Edward Ott

Phys. Rev. Research 2, 043422 (2020) - Published 29 December, 2020

The authors show that a binary tunable metasurface enables fine control over the scattering parameters of a complex electromagnetic cavity.

Decoding across the quantum low-density parity-check code landscape

Joschka Roffe, David R. White, Simon Burton, and Earl Campbell

Phys. Rev. Research 2, 043423 (2020) - Published 28 December, 2020

This paper presents a family of quantum error correction codes and explores the use of belief propagation for their decoding.

Clusterization transition between cluster Mott insulators on a breathing kagome lattice

Xu-Ping Yao, Xiao-Tian Zhang, Yong Baek Kim, Xiaoqun Wang, and Gang Chen

Phys. Rev. Research 2, 043424 (2020) - Published 28 December, 2020

This work investigates an extended Hubbard model on a breathing Kagomé lattice and proposes two types of cluster localization due to the electron repulsion between neighboring sites and partial filling in Mott insulators.

Quantum half-orphans in kagome antiferromagnets

Pranay Patil, Fabien Alet, Sylvain Capponi, and Kedar Damle

Phys. Rev. Research 2, 043425 (2020) - Published 28 December, 2020

The authors study the free spin behavior created by neighboring non-magnetic impurities on the Kagome lattice to quantum fluctuations, along with the remnants of this behavior at zero temperature, and show experimental signatures for this phenomenon.

Designer flat bands in quasi-one-dimensional atomic lattices

Md Nurul Huda, Shawulienu Kezilebieke, and Peter Liljeroth

Phys. Rev. Research 2, 043426 (2020) - Published 28 December, 2020

This work shows the formation of electronic flat bands in atomically precise chains formed by atomic manipulation using scanning tunneling microscopy.

Moiré effects in graphene-hBN heterostructures

Yongping Du, Ning Xu, Xianqing Lin, and Antti-Pekka Jauho

Phys. Rev. Research 2, 043427 (2020) - Published 28 December, 2020

The authors present simulations of magneto-transport for Graphene-hBN heterostructures using an effective lattice model and compare it with experimental results.

Suppression of anharmonic phonons and s-wave superconductivity by defects in the filled skutterudite LaRu4As12

Y. Mizukami, M. Kończykowski, O. Tanaka, J. Juraszek, Z. Henkie, T. Cichorek, and T. Shibauchi

Phys. Rev. Research 2, 043428 (2020) - Published 28 December, 2020

The authors investigate the impact of atomic defects on cage structure in filled skutterudite LaRu4As12 through high-resolution heat capacity measurements, and show the suppression of the anharmonic phonons and s-wave superconductivity with increasing atomic defects.

Direct observation of temperature dependent vortex dynamics in a La0.7Sr0.3MnO3 micromagnet

Einar Digernes, Jonathan Leliaert, Markus Weigand, Erik Folven, and Bartel Van Waeyenberge

Phys. Rev. Research 2, 043429 (2020) - Published 28 December, 2020

This work explores the magnetization dynamics in an epitaxial nanomagnet. The authors link the observed vortex core switching dynamics to the critical velocity switching model using micromagnetic modeling.

Aharonov-Bohm interference as a probe of Majorana fermions

T. C. Bartolo, J. S. Smith, B. Muralidharan, C. Müller, T. M. Stace, and J. H. Cole

Phys. Rev. Research 2, 043430 (2020) - Published 28 December, 2020

This paper uses nonequilibrium Green’s functions to study the interaction between two topologically non-trivial Majorana zero modes arranged in a ring geometry and with a magnetic field applied perpendicular to the ring.

Phonon-induced Floquet topological phases protected by space-time symmetries

Swati Chaudhary, Arbel Haim, Yang Peng, and Gil Refael

Phys. Rev. Research 2, 043431 (2020) - Published 29 December, 2020

This work shows how the symmetry promotion action of a phonon drive can be used to realize Floquet topological phases protected by space-time symmetry.

Diagrammatic expansion of information flows in stochastic Boolean networks

Fumito Mori and Takashi Okada

Phys. Rev. Research 2, 043432 (2020) - Published 29 December, 2020

The authors develop a diagrammatic expansion to compute transfer entropy in stochastic Boolean networks analytically.

Exploring helical phases of matter in bosonic ladders

Andreas Haller, Apollonas S. Matsoukas-Roubeas, Yueting Pan, Matteo Rizzi, and Michele Burrello

Phys. Rev. Research 2, 043433 (2020) - Published 29 December, 2020

This paper explores interacting ultracold bosonic atoms in a ladder geometry, focusing on systems with the same number of particles and magnetic flux quanta.

Pressure-stabilized unconventional stoichiometric yttrium sulfides

Ju Chen, Wenwen Cui, Kun Gao, Jian Hao, Jingming Shi, and Yinwei Li

Phys. Rev. Research 2, 043435 (2020) - Published 29 December, 2020

The authors present theoretical predictions of the phase diagram of yttrium-sulfur, and identify a sulfur-rich compound which exhibits superconductivity at lower pressures.

Understanding causation via correlations and linear response theory

Marco Baldovin, Fabio Cecconi, and Angelo Vulpiani

Phys. Rev. Research 2, 043436 (2020) - Published 29 December, 2020

The authors study the relation between causation and correlations in the context of linear response theory and discuss a method to determine causal links from correlations, under suitable linearity assumptions.

Unification of parton and coupled-wire approaches to quantum magnetism in two dimensions

Eyal Leviatan and David F. Mross

Phys. Rev. Research 2, 043437 (2020) - Published 29 December, 2020

The authors use non-local transformations to describe spin-chain arrays in terms of partons and emergent gauge fields and use the scheme to produce parent Hamiltonians for gapped phases, including chiral and non-chiral spin liquids.

Geometry of complexity in conformal field theory

Mario Flory and Michal P. Heller

Phys. Rev. Research 2, 043438 (2020) - Published 30 December, 2020

The paper addresses the problem of hardness of state preparation in quantum systems looking the same at all scales, and connects it with mathematical language and phenomena known from the nonlinear physics of waves.

Theory of field emission from dielectric coated surfaces

Yang Zhou and Peng Zhang

Phys. Rev. Research 2, 043439 (2020) - Published 30 December, 2020

This paper presents quantum theory for field emission from dielectric-coated cathode surfaces, and find that a dielectric coating may increase the field emission current.

Quantum annealed criticality: A scaling description

Premala Chandra, Piers Coleman, Mucio A. Continentino, and Gilbert G. Lonzarich

Phys. Rev. Research 2, 043440 (2020) - Published 31 December, 2020

The authors provide a framework to explain the onset of quantum criticality in materials with first-order classical phase transition as temperature is reduced.

Potential energy landscape formalism for quantum liquids

Nicolas Giovambattista and Gustavo E. Lopez

Phys. Rev. Research 2, 043441 (2020) - Published 31 December, 2020

The authors extend the potential energy landscape formalism to the case of quantum liquids and how they approach their glass state.

Quantum self-learning Monte Carlo and quantum-inspired Fourier transform sampler

Katsuhiro Endo, Taichi Nakamura, Keisuke Fujii, and Naoki Yamamoto

Phys. Rev. Research 2, 043442 (2020) - Published 31 December, 2020

The authors propose a self-learning Monte Carlo method based on quantum computing and show a proof-of-concept demonstration using the quantum Fourier transform sampler.

Quasiparticles as detector of topological quantum phase transitions

Sourav Manna, N. S. Srivatsa, Julia Wildeboer, and Anne E. B. Nielsen

Phys. Rev. Research 2, 043443 (2020) - Published 31 December, 2020

The authors show that quasiparticles can be used to detect topological quantum phase transitions.

Generalized King linearity and new physics searches with isotope shifts

Julian C. Berengut, Cédric Delaunay, Amy Geddes, and Yotam Soreq

Phys. Rev. Research 2, 043444 (2020) - Published 31 December, 2020

This paper shows how systematic effects due to higher-order nuclear structure terms may be overcome using a data-driven method.

COMMENTS

Comment on “Magnetic circular dichroism versus orbital magnetization”

M. Altarelli

Phys. Rev. Research 2, 048001 (2020) - Published 19 October, 2020

Reply to “Comment on ‘Magnetic circular dichroism versus orbital magnetization' ”

Raffaele Resta

Phys. Rev. Research 2, 048002 (2020) - Published 19 October, 2020

ERRATA

Erratum: Possible nonequilibrium imprint in the cosmic background at low frequencies [Phys. Rev. Research 2, 013210 (2020)]

Marco Baiesi, Carlo Burigana, Livia Conti, Gianmaria Falasco, Christian Maes, Lamberto Rondoni, and Tiziana Trombetti

Phys. Rev. Research 2, 049001 (2020) - Published 11 December, 2020

Erratum: Interplay of 4f3d interactions and spin-induced ferroelectricity in the green phase Gd2BaCuO5 [Phys. Rev. Research 2, 023271 (2020)]

Premakumar Yanda, I. V. Golosovsky, I. Mirebeau, N. V. Ter-Oganessian, Juan Rodríguez-Carvajal, and A. Sundaresan

Phys. Rev. Research 2, 049002 (2020) - Published 24 December, 2020

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