Shiro Sakai and Ryotaro Arita
Phys. Rev. Research 1, 022002(R) (2019) - Published 3 September, 2019
In this study, the authors find exotic superconductivity emerging in quasicrystals under magnetic field, where the Cooper pairs change its sign in real space following the underlying quasiperiodic structure. This is in agreement with recent theory and experimental work.
Arthur V. Straube, Josep M. Pagès, Pietro Tierno, Jordi Ignés-Mullol, and Francesc Sagués
Phys. Rev. Research 1, 022008(R) (2019) - Published 30 September, 2019
The rich collective dynamics of microscopic non-spherical particles driven through liquid crystals results from the balance of different physical interactions. This paper shows the fundamental role of hydrodynamics in the assembly of phoretic colloids that display emergent conformal order
Alexander S. Kuznetsov, Klaus Biermann, and Paulo V. Santos
Phys. Rev. Research 1, 023030 (2019) - Published 26 September, 2019
This paper demonstrates the full dynamic control of on-site energies, the inter-site coupling, as well as the dispersion of lattices of polariton condensates using electrically excited acoustic waves. The spatially and time-dependent acoustic modulation is essentially independent of polariton density, thus making the acoustic modulation applicable to large lattices as well as to the single polariton limit.
Midori Isobe and Ko Okumura
Phys. Rev. Research 1, 022001(R) (2019) - Published 3 September, 2019
A theory of kirigami’s high-extensibility transition shows a striking analogy with Landau theory of continuous transitions, if a rotation angle and elongation of kirigami are regarded as the order parameter and the inverse temperature.
Shiro Sakai and Ryotaro Arita
Phys. Rev. Research 1, 022002(R) (2019) - Published 3 September, 2019
In this study, the authors find exotic superconductivity emerging in quasicrystals under magnetic field, where the Cooper pairs change its sign in real space following the underlying quasiperiodic structure. This is in agreement with recent theory and experimental work.
F. Nur Ünal, André Eckardt, and Robert-Jan Slager
Phys. Rev. Research 1, 022003(R) (2019) - Published 9 September, 2019
This paper shows that the dynamics of two-band systems can be characterized by Hopf maps, where the winding numbers are cast as linking numbers. This finding opens the doors towards both the investigation of Hopf insulators in experiments with ultracold atoms in driven optical lattices and the measurement of Floquet topological invariants via the observation of post quench-dynamics
Erhan Saglamyurek, Taras Hrushevskyi, Logan Cooke, Anindya Rastogi, and Lindsay J. LeBlanc
Phys. Rev. Research 1, 022004(R) (2019) - Published 11 September, 2019
In this paper, the authors experimentally demonstrate ultra-low noise storage of single-photon-level light in cold atoms by exploring the exceptional robustness of the Autler-Townes-splitting memory protocol to various noise processes and decoherence in the regime of high-speed operation.
Yi Zhang
Phys. Rev. Research 1, 022005(R) (2019) - Published 16 September, 2019
This paper shows a microscopic model of a Weyl semimetal that realizes Weyl orbit with the topology of a Trefoil knot. The nontrivial topology allows the commonly trivial magnetic field line along the orbit to contribute a Berry phase and alter the conditions of the quantum Hall effect.
B. M. Schoenauer, N. M. Gergs, P. Schmitteckert, F. Evers, and D. Schuricht
Phys. Rev. Research 1, 022006(R) (2019) - Published 17 September, 2019
This paper discovers long-lived currents in non-equilibrium nanorings that originate from long-lived oscillations between two charge density wave states. The decay rate of these ring currents is found to be strongly suppressed by interactions. It can take values orders of magnitude smaller than the usual lead-induced level broadening.
Malte Selig, Florian Katsch, Robert Schmidt, Steffen Michaelis de Vasconcellos, Rudolf Bratschitsch, Ermin Malic, and Andreas Knorr
Phys. Rev. Research 1, 022007(R) (2019) - Published 26 September, 2019
The authors present a microscopic explanation for the bleaching at the excitonic transition in monolayers of transition metal dichalcogenides, based on the joint action of exchange coupling and phonon-mediated thermalization into dark exciton states. The paper shows how intra- and intervalley coupling on a femtosecond timescale governs the optical valley response of 2D semiconductors.
Arthur V. Straube, Josep M. Pagès, Pietro Tierno, Jordi Ignés-Mullol, and Francesc Sagués
Phys. Rev. Research 1, 022008(R) (2019) - Published 30 September, 2019
The rich collective dynamics of microscopic non-spherical particles driven through liquid crystals results from the balance of different physical interactions. This paper shows the fundamental role of hydrodynamics in the assembly of phoretic colloids that display emergent conformal order
Howard Baer, Vernon Barger, and Shadman Salam
Phys. Rev. Research 1, 023001 (2019) - Published 3 September, 2019
This paper studies the notion of “Stringy naturalness” and how it lifts the Higgs boson mass to the 125 GeV range whilst also lifting sparticle masses beyond LHC search limits. As a consequence, SUSY may be revealed at high luminosity LHC via the presence of light higgsinos of mass ~100-300 GeV while a higher energy LHC upgrade may be required to access gluinos and top squarks.
Edwin Ireson, Mikhail Shifman, and Alexei Yung
Phys. Rev. Research 1, 023002 (2019) - Published 4 September, 2019
This paper shows how internal color degrees of freedom living on the world sheet of non-Abelian string exist no longer in complex projective space but a more general type of space, called the Grassmannian manifold. The dynamics of the sigma model for the low-energy fluctuations of this string are then analyzed, down to the quantum level.
Andre Schneider, Tim Wolz, Marco Pfirrmann, Martin Spiecker, Hannes Rotzinger, Alexey V. Ustinov, and Martin Weides
Phys. Rev. Research 1, 023003 (2019) - Published 4 September, 2019
Quantum bits require isolation from outer fields to maintain their coherence, and the superconducting state is destroyed by magnetic fields. In this work, however, the authors measure a superconducting transmon qubit in relatively large magnetic fields. By demonstrating quantum coherence up to field values of 40mT, new avenues in hybrid systems and sensing applications based on superconducting quantum circuits are opened up.
Aydin Deger and Christian Flindt
Phys. Rev. Research 1, 023004 (2019) - Published 4 September, 2019
This article presents a pathway from measurements of partition function zeros to the determination of critical points and universal critical exponents of continuous phase transitions. The method is illustrated in ferromagnetism, but can be applied to other physical systems.
Evan Stewart and Kirill Tuchin
Phys. Rev. Research 1, 023005 (2019) - Published 6 September, 2019
This paper studies the influence of temporal variations of the topological charge density. The authors focus on how this chiral anomaly manifest itself more dominantly through the boundary conditions and show this in two optics examples.
Aleksander Stanislavsky and Aleksander Weron
Phys. Rev. Research 1, 023006 (2019) - Published 6 September, 2019
By using independent types of traps with heavy-tailed waiting times, this paper shed light on the transition between diffusive regimes, as characterized by different exponents in the mean squared displacement at short and long times. The authors show that this can be further utilized to engineer the asymptotic behavior of the mean squared displacement by changing the properties of the traps.
J. Nissinen and G. E. Volovik
Phys. Rev. Research 1, 023007 (2019) - Published 6 September, 2019
This paper extends the theory of the intrinsic or anomalous quantum Hall effect to three-dimensional deformed crystalline topological insulators using geometric tetrad fields related to elastic deformations. The three-dimensional Hall effect implies mixed elastic-electromagnetic quantum anomalies that are reminiscent of axial-gravitational anomalies of relativistic quantum field theory for gapped fermions.
Maximilian Voit and Hildegard Meyer-Ortmanns
Phys. Rev. Research 1, 023008 (2019) - Published 6 September, 2019
Nested self-similar structures are frequently found in nature. This work shows how to choose microscopic rules of competition so that this kind of dynamics results by construction. Hierarchies in time scales emerge that lead to an iterated modulation of fast oscillations via slower ones, while hierarchies in spatial scales show up as nested spirals on a grid.
E. Garrido and A. S. Jensen
Phys. Rev. Research 1, 023009 (2019) - Published 6 September, 2019
This paper studies the equivalency between applying a potential to a system to reduce its dimension and a dimension-dependent centrifugal barrier contained in the Schrödinger equation. The authors explore this for a two-body system and show the existence of a unique universal relation between results from these two methods.
Hongbin Fang, Suyi Li, Manoj Thota, and K. W. Wang
Phys. Rev. Research 1, 023010 (2019) - Published 9 September, 2019
This papers shows that origami can be used as a versatile scaffold to construct 2D and 3D Bravais lattices, and continuously transform them between different symmetric configurations via folding.
S. Licciardello, N. Maksimovic, J. Ayres, J. Buhot, M. Čulo, B. Bryant, S. Kasahara, Y. Matsuda, T. Shibauchi, V. Nagarajan, J. G. Analytis, and N. E. Hussey
Phys. Rev. Research 1, 023011 (2019) - Published 10 September, 2019
This paper studies the magnetoresistance of FeSe1-xSx as a function of sulfur doping, which goes through a quantum critical point characterized by electron nematicity. The experiments show a coexistence of a quadratic and a linear form of the magneto-resistance. These findings suggest that the low-lying electronic excitations in a quantum critical metal may have dual character, one that is coherent and one that is quantum critical
Malte Schröder and Marc Timme
Phys. Rev. Research 1, 023012 (2019) - Published 10 September, 2019
Uniform random rotations map a point on the sphere uniformly to any other point. In two dimensions, repeating the same rotation twice results again in a uniform distribution. However, such double rotations in three dimensions result in an asymmetric distribution of the image. By deconstructing this operation, the authors show an intuitive explanation for this asymmetry and why it decays with increasing dimension, disappearing again in infinite dimensions
Stefano Longhi
Phys. Rev. Research 1, 023013 (2019) - Published 11 September, 2019
This paper uncovers a bulk probing method to catch physical effects hindered in topological non-Hermitian crystals. The method is based on Lyapunov exponent calculation of a quantum walker on the lattice and can reveal non-Bloch phase transitions, the non-Hermitian skin effect and breakdown of the bulk-boundary correspondence.
G. Ptitcyn, M. S. Mirmoosa, and S. A. Tretyakov
Phys. Rev. Research 1, 023014 (2019) - Published 12 September, 2019
The authors develop a theoretical model of meta-atoms which can be arbitrarily modulated in time and show how to realize a non-scattering regime of a single meta-atom which stores all the incident energy in its near fields.
A. Reymbaut, S. Bergeron, R. Garioud, M. Thénault, M. Charlebois, P. Sémon, and A.-M. S. Tremblay
Phys. Rev. Research 1, 023015 (2019) - Published 13 September, 2019
The decrease of the spin susceptibility below a doping-dependent temperature is a signature of the problem of the pseudogap in cuprate superconductors. This paper proposes that the pseudogap is a finite-doping extension of the Mott transition where near-neighbor singlet correlations play a crucial role and propose several experimental tests to check on this prediction.
Luca Carletti, Sergey S. Kruk, Andrey A. Bogdanov, Costantino De Angelis, and Yuri Kivshar
Phys. Rev. Research 1, 023016 (2019) - Published 13 September, 2019
This paper combines the concept of bound states in the continuum with engineering of epsilon-near-zero substrates to boost multi-frequency and multi-step cascaded nonlinear processes at the nanoscale. High-order nonlinear processes such as four-wave mixing, third- and fifth-harmonic generation in all-dielectric subwavelength resonators are shown to be enhanced in comparison with the state-of-the-art results.
Pierre A. Haas, Diana Cholakova, Nikolai Denkov, Raymond E. Goldstein, and Stoyan K. Smoukov
Phys. Rev. Research 1, 023017 (2019) - Published 16 September, 2019
Oil droplets in aqueous surfactant solutions flatten into a host of polyhedral and polygonal shapes on slow cooling. These intriguing transformations promise novel synthesis methods for small polymeric particles. This paper reveals an intermediate octahedral stage that explain how icosahedral droplets flatten into polygonal platelets.
Andrey I. Dnestryan, Oleg I. Tolstikhin, Frank Jensen, and Lars Bojer Madsen
Phys. Rev. Research 1, 023018 (2019) - Published 17 September, 2019
This paper elucidates effects of torsional motion on tunneling ionization in intense laser fields. Recent advances in the formulation and implementation of an integral representation of the weak-field asymptotic theory make it possible to study the behavior of the tunneling ionization rate with the dihedral angle between the two planes in biphenyl and substituted biphenyl molecules. These results have implications for control of torsional motion and deracemization schemes for axial chiral molecules.
Palka Puri, Nisha Gupta, Sameep Chandel, Supriyo Naskar, Anil Nair, Abhishek Chaudhuri, Mithun K. Mitra, and Sudipto Muhuri
Phys. Rev. Research 1, 023019 (2019) - Published 18 September, 2019
The authors show the existence of an internal regulatory mechanism for intracellular cargo transport arising from the unique “catchbond” behavior of dynein motors which can in turn give rise to coordinated transport. This appears to resolve the observed paradox by which inhibiting the activity of one type of motor results in an overall decline in the motility of the cellular cargo in both directions.
Xiangyi Meng, Yang Li, Jian-Wei Zhang, Hong Guo, and H. Eugene Stanley
Phys. Rev. Research 1, 023020 (2019) - Published 19 September, 2019
The authors introduce a new multiple-scale perturbation method that works on integro-differential equations. The method is particularly useful for studying general non-Markovian effects. They propose an open-system model of a continuous-time quantum walk on different network topologies and show that non-Markovianity can, indeed, speed up the quantum walk.
Zhedong Zhang, Marlan O. Scully, and Girish S. Agarwal
Phys. Rev. Research 1, 023021 (2019) - Published 19 September, 2019
This paper shows a mechanism to produce entanglement between magnons via Kerr nonlinearity. The authors sudty this in a system of two YIG spheres and propose that the scheme can be extended to other systems.
A. Crisanti, A. Sarracino, and M. Zannetti
Phys. Rev. Research 1, 023022 (2019) - Published 20 September, 2019
This paper shows that Bose-Einstein condensates in canonical and grand-canonical conditions stands for different phenomena: the familiar ordering transition in the former opposed to condensation of fluctuations without any ordering in the latter. The authors connect this to recent experiments that show Bose-Einstein condensates in a gas of photons.
Niels Lörch, Yaxing Zhang, Christoph Bruder, and M. I. Dykman
Phys. Rev. Research 1, 023023 (2019) - Published 23 September, 2019
An anharmonic oscillator driven at triple its eigenfrequency has three equivalent vibrational states in addition to a quiet state. In an array of coupled oscillators the degeneracy of the vibrational states of individual oscillators is broken. This article investigates the quantum phase transition to the broken-symmetry state. It also studies the steady state of a single quantum dissipative oscillator.
Sebastian Vellmer and Benjamin Lindner
Phys. Rev. Research 1, 023024 (2019) - Published 23 September, 2019
This paper presents a theoretical framework for the spike-train power spectrum of colored-noise driven neurons with spike-frequency adaptation and test this theory against stochastic simulation in various cases. The authors also extend and verify the theory for neurons coupled in a random network, in which the correlations of input fluctuations and of the generated spike train are self-consistently related.
Jin-Guo Liu, Yi-Hong Zhang, Yuan Wan, and Lei Wang
Phys. Rev. Research 1, 023025 (2019) - Published 24 September, 2019
Scalability in a variatonal quantum eigensolver is limited by both the number of qubits available and the gradient vanishing problem. This paper shows several types of tensor network inspired circuit ansatzes. These are area law entangled, qubit efficient, and experimentally feasible while not having exponential contraction complexity problem as in their classical counterpart.
D. Levis, I. Pagonabarraga, and B. Liebchen
Phys. Rev. Research 1, 023026 (2019) - Published 24 September, 2019
This paper studies oscillators that move on a plane while oscillating in their direction of motion. The onset of activity induces new routes for synchronization that give rise to particular behaviors such as the emergence of coherent flocks, or a self-segregation of oscillators of opposite chirality into large counterrotating clusters.
Chun-Jie Yang, Jun-Hong An, and Hai-Qing Lin
Phys. Rev. Research 1, 023027 (2019) - Published 25 September, 2019
This paper proposes a mechanism to overcome the loss effect on localized surface plasmons during their interactions with the quantum emitters (QEs). The authors find distinctive signatures of quantized couplings in the long-time limit and attribute them to the different numbers of bound states formed by the combined system.
Ludovic Spiteri, Hervé Mohrbach, and René Messina
Phys. Rev. Research 1, 023028 (2019) - Published 25 September, 2019
This paper examines the effect of an external magnetic on the crystallization and magnetization of layered dipolar particles. Exact results are provided for monolayers and bilayers where it is shown that increasing the layer thickness provides enhanced cohesion and weaker susceptibility.
H. Hedayat, C. J. Sayers, D. Bugini, C. Dallera, D. Wolverson, T. Batten, S. Karbassi, S. Friedemann, G. Cerullo, J. van Wezel, S. R. Clark, E. Carpene, and E. Da Como
Phys. Rev. Research 1, 023029 (2019) - Published 26 September, 2019
Time-resolved photoemission and optical experiments reveal a dynamical slowing down in the recovery of the charge density wave (CDW) in 1T-TiSe2 following perturbation by a femtosecond laser pulse. This behavior correlates with a switching of the dominant coherent phonon oscillations related to the crystal lattice. The work sheds light on the long standing question of exciton- and lattice-driven order in this complex system.
Alexander S. Kuznetsov, Klaus Biermann, and Paulo V. Santos
Phys. Rev. Research 1, 023030 (2019) - Published 26 September, 2019
This paper demonstrates the full dynamic control of on-site energies, the inter-site coupling, as well as the dispersion of lattices of polariton condensates using electrically excited acoustic waves. The spatially and time-dependent acoustic modulation is essentially independent of polariton density, thus making the acoustic modulation applicable to large lattices as well as to the single polariton limit.
Gabriel E. Topp, Gregor Jotzu, James W. McIver, Lede Xian, Angel Rubio, and Michael A. Sentef
Phys. Rev. Research 1, 023031 (2019) - Published 27 September, 2019
This study explores how twisted bilayers of graphene, arranged in Moiré patterns, can be used for Floquet engineering tunable topological properties. The authors show that the combination of a backgate voltage and circularly polarized laser pulses can be used to manipulate the Berry curvature of this material. The ultrafast changes of the resulting Hall currents can be detected by recently demonstrated sub-picosecond time-resolved transport experiments.
Sumeet Khatri, Corey T. Matyas, Aliza U. Siddiqui, and Jonathan P. Dowling
Phys. Rev. Research 1, 023032 (2019) - Published 27 September, 2019
This paper proposes two figures of merit to be used for the assessment of practical quantum communication networks: the average link connection time and the average largest entanglement cluster size. The authors show bounds on these, that represent limits on quantum communication networks under practical scenarios.
Simon Stuij, Jan Maarten van Doorn, Thomas Kodger, Joris Sprakel, Corentin Coulais, and Peter Schall
Phys. Rev. Research 1, 023033 (2019) - Published 27 September, 2019
Using laser tweezers on self-assembled colloidal chains, the authors explore the buckling instability of filaments in the presence of thermal fluctuations and plasticity. They are able to identify a novel form of stochastic buckling instability, for which fluctuations become amplified and diverge in the vicinity of the critical buckling transition.
Aviel Chaimovich, Kurt Kremer, and Christine Peter
Phys. Rev. Research 1, 023034 (2019) - Published 30 September, 2019
This paper reveals a multiscale framework for molecular simulations in which the resolution is relative to the observer: While near neighbors interact by a geometric multi-site potential, far neighbors interact by an isotropic single-site potential. This algorithm captures the behavior of various liquids, and it can be viewed as the natural variant of the “cell-multipole” approach for molecular systems.