Browse Issues:

Implementing Optogenetic Modulation in Mechanotransduction

Miao Yu, Shimin Le, Samuel Barnett, Zhenhuan Guo, Xueying Zhong, Pakorn Kanchanawong, and Jie Yan

Phys. Rev. X 10, 021001 (2020) - Published 1 April, 2020

Experiments show that light-induced dimerization can be used to control the connectivity of force-transmission linkages in cells, providing a new way to study how cells react to mechanical stimuli.

Toward a High-Resolution Reconstruction of 3D Nerve Fiber Architectures and Crossings in the Brain Using Light Scattering Measurements and Finite-Difference Time-Domain Simulations

Miriam Menzel, Markus Axer, Hans De Raedt, Irene Costantini, Ludovico Silvestri, Francesco S. Pavone, Katrin Amunts, and Kristel Michielsen

Phys. Rev. X 10, 021002 (2020) - Published 2 April, 2020

Light scattering measurements and high-performance computing enable mapping of complex nerve fiber organizations in the brain.

Absence of a Dissipative Quantum Phase Transition in Josephson Junctions

A. Murani, N. Bourlet, H. le Sueur, F. Portier, C. Altimiras, D. Esteve, H. Grabert, J. Stockburger, J. Ankerhold, and P. Joyez

Phys. Rev. X 10, 021003 (2020) - Published 3 April, 2020

Experiments show that, contrary to long-held predictions, a Josephson junction in series with a large enough resistance does not become insulating at low temperature, thus forcing a reanalysis of quantum phase transitions in these and similar systems.

3D Spatial Exploration by E. coli Echoes Motor Temporal Variability

Nuris Figueroa-Morales, Rodrigo Soto, Gaspard Junot, Thierry Darnige, Carine Douarche, Vincent A. Martinez, Anke Lindner, and Éric Clément

Phys. Rev. X 10, 021004 (2020) - Published 6 April, 2020

Experiments show that bacteria constantly alter their exploration states—frequent directional changes and persistent swimming—which could provide insight into the onset of infections and the dynamics of microbial communities.

Hall Viscosity in Quantum Systems with Discrete Symmetry: Point Group and Lattice Anisotropy

Pranav Rao and Barry Bradlyn

Phys. Rev. X 10, 021005 (2020) - Published 7 April, 2020

An expanded consideration of the nondissipative viscosity finds new relationships between anisotropy, internal angular momentum, and Hall viscosity.

Repetitive Quantum Nondemolition Measurement and Soft Decoding of a Silicon Spin Qubit

Xiao Xue, Benjamin D’Anjou, Thomas F. Watson, Daniel R. Ward, Donald E. Savage, Max G. Lagally, Mark Friesen, Susan N. Coppersmith, Mark A. Eriksson, William A. Coish, and Lieven M. K. Vandersypen

Phys. Rev. X 10, 021006 (2020) - Published 8 April, 2020

An experiment measures an individual electron spin with high fidelity and without demolishing it, thus setting the stage for robust quantum error correction with spin qubits in silicon.

Plastic and Superionic Helium Ammonia Compounds under High Pressure and High Temperature

Cong Liu, Hao Gao, Andreas Hermann, Yong Wang, Maosheng Miao, Chris J. Pickard, Richard J. Needs, Hui-Tian Wang, Dingyu Xing, and Jian Sun

Phys. Rev. X 10, 021007 (2020) - Published 9 April, 2020

Stable compounds made from helium and ammonia are predicted to form at the extreme pressures found inside Neptune and Uranus.

Crumples as a Generic Stress-Focusing Instability in Confined Sheets

Yousra Timounay, Raj De, Jessica L. Stelzel, Zachariah S. Schrecengost, Monica M. Ripp, and Joseph D. Paulsen

Phys. Rev. X 10, 021008 (2020) - Published 10 April, 2020

Thin, flexible sheets in many geometries exhibit a common transition as they are stressed.

Learning Force Fields from Stochastic Trajectories

Anna Frishman and Pierre Ronceray

Phys. Rev. X 10, 021009 (2020) - Published 13 April, 2020

Reconstructing a stochastic dynamical model from single noisy trajectories of complex Brownian systems is made possible by an efficient force inference technique.

Field-Angle-Resolved Magnetic Excitations as a Probe of Hidden-Order Symmetry in CeB6

P. Y. Portnichenko, A. Akbari, S. E. Nikitin, A. S. Cameron, A. V. Dukhnenko, V. B. Filipov, N. Yu. Shitsevalova, P. Čermák, I. Radelytskyi, A. Schneidewind, J. Ollivier, A. Podlesnyak, Z. Huesges, J. Xu, A. Ivanov, Y. Sidis, S. Petit, J.-M. Mignot, P. Thalmeier, and D. S. Inosov

Phys. Rev. X 10, 021010 (2020) - Published 14 April, 2020

A novel approach to analyzing neutron-scattering data offers a new way to probe magnetic order arising from higher-order electron multipoles.

Interacting Polaron-Polaritons

Li Bing Tan, Ovidiu Cotlet, Andrea Bergschneider, Richard Schmidt, Patrick Back, Yuya Shimazaki, Martin Kroner, and Ataç İmamoğlu

Phys. Rev. X 10, 021011 (2020) - Published 15 April, 2020

Photons in certain materials can form massive, strongly interacting quasiparticles, giving rise to nonlinear effects that could be useful in quantum optics.

Quantum Logic Spectroscopy with Ions in Thermal Motion

D. Kienzler, Y. Wan, S. D. Erickson, J. J. Wu, A. C. Wilson, D. J. Wineland, and D. Leibfried

Phys. Rev. X 10, 021012 (2020) - Published 16 April, 2020

An enhanced version of quantum logic spectroscopy, used to map absorption and emission from single atoms, tolerates some ion motion and entangles several ions for improved sensitivity.

Light-Driven Raman Coherence as a Nonthermal Route to Ultrafast Topology Switching in a Dirac Semimetal

C. Vaswani, L.-L. Wang, D. H. Mudiyanselage, Q. Li, P. M. Lozano, G. D. Gu, D. Cheng, B. Song, L. Luo, R. H. J. Kim, C. Huang, Z. Liu, M. Mootz, I. E. Perakis, Y. Yao, K. M. Ho, and J. Wang

Phys. Rev. X 10, 021013 (2020) - Published 17 April, 2020

A light-induced phase transition in a Dirac material offers insight into how these materials respond to periodic driving (that is, quantum back-and-forth motion), information necessary for topology-based quantum computation and topological transistors.

Gravitational Redshift in Quantum-Clock Interferometry

Albert Roura

Phys. Rev. X 10, 021014 (2020) - Published 20 April, 2020

A proposed scheme for creating a quantum superposition of atomic clocks at different heights offers a novel way of testing general relativity in the quantum regime.

Thermally Enhanced Electro-osmosis to Control Foam Stability

Oriane Bonhomme, Li Peng, and Anne-Laure Biance

Phys. Rev. X 10, 021015 (2020) - Published 21 April, 2020

Electric fields can control the stability of liquid foams, a versatile material used in many industrial applications that is otherwise difficult to stabilize or destabilize on demand.

Spectroscopic and Structural Probing of Excited-State Molecular Dynamics with Time-Resolved Photoelectron Spectroscopy and Ultrafast Electron Diffraction

Yusong Liu, Spencer L. Horton, Jie Yang, J. Pedro F. Nunes, Xiaozhe Shen, Thomas J. A. Wolf, Ruaridh Forbes, Chuan Cheng, Bryan Moore, Martin Centurion, Kareem Hegazy, Renkai Li, Ming-Fu Lin, Albert Stolow, Paul Hockett, Tamás Rozgonyi, Philipp Marquetand, Xijie Wang, and Thomas Weinacht

Phys. Rev. X 10, 021016 (2020) - Published 22 April, 2020

The combination of computer simulations and two powerful experimental methods for following molecular change on femtosecond timescales offers an unprecedented view of how a photoexcited molecule breaks apart.

Formation and Collision of Multistability-Enabled Composite Dissipative Kerr Solitons

Wenle Weng, Romain Bouchand, and Tobias J. Kippenberg

Phys. Rev. X 10, 021017 (2020) - Published 23 April, 2020

Using a new ultrafast sampling technique, experiments probe collisions between solitons in a resonator, revealing unique behavior that otherwise cannot be directly observed.

Controlled Introduction of Defects to Delafossite Metals by Electron Irradiation

V. Sunko, P. H. McGuinness, C. S. Chang, E. Zhakina, S. Khim, C. E. Dreyer, M. Konczykowski, H. Borrmann, P. J. W. Moll, M. König, D. A. Muller, and A. P. Mackenzie

Phys. Rev. X 10, 021018 (2020) - Published 24 April, 2020

Experiments reveal that the high conductivity of delafossite oxide materials arises from an extreme degree of purity in their naturally grown crystal structures, a finding that aids the quest for ever-better conductors.

Complex Spacing Ratios: A Signature of Dissipative Quantum Chaos

Lucas Sá, Pedro Ribeiro, and Tomaž Prosen

Phys. Rev. X 10, 021019 (2020) - Published 27 April, 2020

Mathematical tools for distinguishing open quantum systems that are chaotic from those that are exactly solvable fill an important gap in understanding dissipation and decoherence in scenarios relevant to quantum-based technologies.

Neural Canonical Transformation with Symplectic Flows

Shuo-Hui Li, Chen-Xiao Dong, Linfeng Zhang, and Lei Wang

Phys. Rev. X 10, 021020 (2020) - Published 28 April, 2020

A modern machine learning known as normalizing flow can automate cumbersome canonical transformations of Hamiltonian equations, thereby opening up this time-honored technique for studying dynamics to a wide array of complex systems.

Photonic-Crystal Josephson Traveling-Wave Parametric Amplifier

Luca Planat, Arpit Ranadive, Rémy Dassonneville, Javier Puertas Martínez, Sébastien Léger, Cécile Naud, Olivier Buisson, Wiebke Hasch-Guichard, Denis M. Basko, and Nicolas Roch

Phys. Rev. X 10, 021021 (2020) - Published 28 April, 2020

A new solution to the phase-matching problem common to so-called traveling-wave parametric amplifiers is achieved with a simple design that’s easy to fabricate.

Driven-Dissipative Quantum Kerr Resonators: New Exact Solutions, Photon Blockade and Quantum Bistability

David Roberts and Aashish A. Clerk

Phys. Rev. X 10, 021022 (2020) - Published 29 April, 2020

A new approach to describing the interplay between quantum mechanics, nonequilibrium driving, and dissipation could enable a paradigm shift in how bosonic systems are used in quantum-based technologies.

Phase Diagram and Self-Organizing Dynamics in a Thermal Ensemble of Strongly Interacting Rydberg Atoms

Dong-Sheng Ding, Hannes Busche, Bao-Sen Shi, Guang-Can Guo, and Charles S. Adams

Phys. Rev. X 10, 021023 (2020) - Published 29 April, 2020

A new experiment reveals unexpected connections between a nonequilibrium phase transition in Rydberg gases and the way fires spread through a burning forest.

Observation of Quantized Exciton Energies in Monolayer WSe2 under a Strong Magnetic Field

Tianmeng Wang, Zhipeng Li, Zhengguang Lu, Yunmei Li, Shengnan Miao, Zhen Lian, Yuze Meng, Mark Blei, Takashi Taniguchi, Kenji Watanabe, Sefaattin Tongay, Wang Yao, Dmitry Smirnov, Chuanwei Zhang, and Su-Fei Shi

Phys. Rev. X 10, 021024 (2020) - Published 30 April, 2020

Experiments show for the first time the quantization of exciton energies in a 2D semiconductor exposed to a high magnetic field, setting the stage for explorations of quantized excitons in the presence of strong Coulomb interactions.

Spectrum-Wide Quantum Criticality at the Surface of Class AIII Topological Phases: An “Energy Stack” of Integer Quantum Hall Plateau Transitions

Björn Sbierski, Jonas F. Karcher, and Matthew S. Foster

Phys. Rev. X 10, 021025 (2020) - Published 1 May, 2020

Surprising connections between surface conduction in certain topological materials and the quantum Hall effect point to a deep connection between topological physics in two and three dimensions.

Optical Nonlocality in Polar Dielectrics

Christopher R. Gubbin and Simone De Liberato

Phys. Rev. X 10, 021027 (2020) - Published 4 May, 2020

By including nonlocal effects, a new theory provides an accurate description of the optical properties of nanostructures made of polar dielectrics—crystal semiconductors formed from polar molecules.

Transient Trapping into Metastable States in Systems with Competing Orders

Zhiyuan Sun and Andrew J. Millis

Phys. Rev. X 10, 021028 (2020) - Published 5 May, 2020

A difference in the relaxation timescales of competing orders in a system allows one to drive the system into metastable states not accessible in equilibrium.

Pure Spin Current and Magnon Chemical Potential in a Nonequilibrium Magnetic Insulator

Kevin S. Olsson, Kyongmo An, Gregory A. Fiete, Jianshi Zhou, Li Shi, and Xiaoqin Li

Phys. Rev. X 10, 021029 (2020) - Published 6 May, 2020

Experiments measure, for the first time, two distinct contributions to the spin current in a magnetic insulator as well as the nonequilibrium magnon chemical potential, insight that can inform the development of spin-based technologies.

Robust Ferromagnetism in Highly Strained SrCoO3 Thin Films

Yujia Wang, Qing He, Wenmei Ming, Mao-Hua Du, Nianpeng Lu, Clodomiro Cafolla, Jun Fujioka, Qinghua Zhang, Ding Zhang, Shengchun Shen, Yingjie Lyu, Alpha T. N’Diaye, Elke Arenholz, Lin Gu, Cewen Nan, Yoshinori Tokura, Satoshi Okamoto, and Pu Yu

Phys. Rev. X 10, 021030 (2020) - Published 7 May, 2020

A new and unexpected ferromagnetic ground state emerges in highly strained thin films of a transition-metal oxide, shedding new light on electronic and magnetic properties that could be manipulated via strain engineering.

Realization of a Density-Dependent Peierls Phase in a Synthetic, Spin-Orbit Coupled Rydberg System

Vincent Lienhard, Pascal Scholl, Sebastian Weber, Daniel Barredo, Sylvain de Léséleuc, Rukmani Bai, Nicolai Lang, Michael Fleischhauer, Hans Peter Büchler, Thierry Lahaye, and Antoine Browaeys

Phys. Rev. X 10, 021031 (2020) - Published 8 May, 2020

An array of highly excited “Rydberg atoms” generates an artificial gauge field, a crucial step for creating quantum simulations that rely on strongly interacting topological matter.

Long-Lived Interacting Phases of Matter Protected by Multiple Time-Translation Symmetries in Quasiperiodically Driven Systems

Dominic V. Else, Wen Wei Ho, and Philipp T. Dumitrescu

Phys. Rev. X 10, 021032 (2020) - Published 11 May, 2020

A mathematical analysis reveals that novel, long-lived nonequilibrium phases can arise in matter subjected to an external quasiperiodic drive, hinting at unexplored richness in the phases of nonequilibrium matter.

Deconfined Critical Point in a Doped Random Quantum Heisenberg Magnet

Darshan G. Joshi, Chenyuan Li, Grigory Tarnopolsky, Antoine Georges, and Subir Sachdev

Phys. Rev. X 10, 021033 (2020) - Published 12 May, 2020

Modeling work shows that a puzzling transformation in cuprates optimally doped for the highest superconductivity temperature is tied to a quantum phase transition.

Dynamic Spin Correlations in the Honeycomb Lattice Na2IrO3 Measured by Resonant Inelastic x-Ray Scattering

Jungho Kim, Jiří Chaloupka, Yogesh Singh, J. W. Kim, B. J. Kim, D. Casa, A. Said, X. Huang, and T. Gog

Phys. Rev. X 10, 021034 (2020) - Published 13 May, 2020

X-ray scattering produces magnetic excitation spectra with unprecedented energy resolution in a quantum spin-liquid candidate material, providing crucial info for comparing measured spin correlations with theory.

Tunable Persistent Random Walk in Swimming Droplets

Adrien Izzet, Pepijn G. Moerman, Preston Gross, Jan Groenewold, Andrew D. Hollingsworth, Jérôme Bibette, and Jasna Brujic

Phys. Rev. X 10, 021035 (2020) - Published 14 May, 2020

The random motion of oil droplets in water is caused by the flow of surfactants at the interface, a finding that gives rise to a broadly tunable swimming system, akin to microorganisms, and allows us to study their self-organization.

Rectification in Nonequilibrium Parity Violating Metamaterials

Zhenghan Liao, William T. M. Irvine, and Suriyanarayanan Vaikuntanathan

Phys. Rev. X 10, 021036 (2020) - Published 15 May, 2020

Mathematical analysis of a model network of linked masses on springs reveals how complex patterns of directed energy motion can arise from random fluctuations.

Black Holes in 4D N=4 Super-Yang-Mills Field Theory

Francesco Benini and Elisa Milan

Phys. Rev. X 10, 021037 (2020) - Published 18 May, 2020

String theory provides a microscopic description of the entropy of certain theoretical black holes—an important step toward understanding black hole thermodynamics.

Irreversible Qubit-Photon Coupling for the Detection of Itinerant Microwave Photons

Raphaël Lescanne, Samuel Deléglise, Emanuele Albertinale, Ulysse Réglade, Thibault Capelle, Edouard Ivanov, Thibaut Jacqmin, Zaki Leghtas, and Emmanuel Flurin

Phys. Rev. X 10, 021038 (2020) - Published 18 May, 2020

A new single-photon detector minimizes false positives by ensuring that a qubit switches to its excited state if and only if a photon enters a microwave resonator.

Polarization-Dependent Theory of Two-Wave Mixing in Nonlinear Media, and Application to Dynamical Polarization Control

P. Michel, E. Kur, M. Lazarow, T. Chapman, L. Divol, and J. S. Wurtele

Phys. Rev. X 10, 021039 (2020) - Published 19 May, 2020

A new proposal for dynamically manipulating the polarization of a light wave brings this ability to various nonlinear optical media and high-power lasers.

Exact Generalized Kohn-Sham Theory for Hybrid Functionals

Rachel Garrick, Amir Natan, Tim Gould, and Leeor Kronik

Phys. Rev. X 10, 021040 (2020) - Published 20 May, 2020

A rigorous analysis of one of the mathematical workhorses used in density-functional-theory calculations provides exact definitions and relations that could help improve predictions of material and molecular properties.

Lattice Gauge Theories and String Dynamics in Rydberg Atom Quantum Simulators

Federica M. Surace, Paolo P. Mazza, Giuliano Giudici, Alessio Lerose, Andrea Gambassi, and Marcello Dalmonte

Phys. Rev. X 10, 021041 (2020) - Published 21 May, 2020

Recent experiments with excited cold-atom gases emulate a gauge theory that describes 1D quantum electrodynamics, insight that could help with the development of tabletop experiments for probing extreme states of matter.

Chiral Spin Liquid Phase of the Triangular Lattice Hubbard Model: A Density Matrix Renormalization Group Study

Aaron Szasz, Johannes Motruk, Michael P. Zaletel, and Joel E. Moore

Phys. Rev. X 10, 021042 (2020) - Published 22 May, 2020

A chiral spin liquid—in which heat moves in one direction around the edge of the material—arises in a simple model of a prototypical quantum spin liquid, answering long-standing questions about these exotic states of matter.

Anomalous Correlators in Nonlinear Dispersive Wave Systems

Joseph Zaleski, Miguel Onorato, and Yuri V. Lvov

Phys. Rev. X 10, 021043 (2020) - Published 26 May, 2020

An extension to wave turbulence theory shows that in a system of nonlinear waves, correlations among the waves arise, causing “ghost” excitations that lead to coherent structures in physical space.

Floquet Prethermalization in a Bose-Hubbard System

Antonio Rubio-Abadal, Matteo Ippoliti, Simon Hollerith, David Wei, Jun Rui, S. L. Sondhi, Vedika Khemani, Christian Gross, and Immanuel Bloch

Phys. Rev. X 10, 021044 (2020) - Published 27 May, 2020

An exponential suppression of heating has been observed in a periodically driven optical lattice, opening up an opportunity to engineer new states of matter.

Exact Spatiotemporal Dynamics of Confined Lattice Random Walks in Arbitrary Dimensions: A Century after Smoluchowski and Pólya

Luca Giuggioli

Phys. Rev. X 10, 021045 (2020) - Published 28 May, 2020

An exact solution to the discrete diffusion equation allows for accurate predictions of how the probabilities of reaction diffusion processes evolve over time.

Prethermalization without Temperature

David J. Luitz, Roderich Moessner, S. L. Sondhi, and Vedika Khemani

Phys. Rev. X 10, 021046 (2020) - Published 29 May, 2020

Optimal application of a magnetic field can increase the lifetime of transient time crystals by orders of magnitude, and autocorrelation functions can distinguish transient time crystals from infinitely long-lived ones.

Revealing Dynamics, Communities, and Criticality from Data

Deniz Eroglu, Matteo Tanzi, Sebastian van Strien, and Tiago Pereira

Phys. Rev. X 10, 021047 (2020) - Published 1 June, 2020

A technique for analyzing complex networks can predict, with limited time-series data, critical transitions before they occur. Such insight could help model and predict changes in a neuronal network.

Reflection Matrix Approach for Quantitative Imaging of Scattering Media

William Lambert, Laura A. Cobus, Mathieu Couade, Mathias Fink, and Alexandre Aubry

Phys. Rev. X 10, 021048 (2020) - Published 2 June, 2020

A new way of focusing waves creates a variety of new types of images that will be decisive for biomedical diagnosis in ultrasound imaging and optical microscopy, nondestructive evaluation in industry, and monitoring in geophysics.

Sub-Doppler Cooling and Compressed Trapping of YO Molecules at μK Temperatures

Shiqian Ding, Yewei Wu, Ian A. Finneran, Justin J. Burau, and Jun Ye

Phys. Rev. X 10, 021049 (2020) - Published 3 June, 2020

Researchers exploit the peculiar structure of yttrium monoxide to cool the gas to ultralow temperatures and record-breaking densities.

Machine-Learning-Optimized Aperiodic Superlattice Minimizes Coherent Phonon Heat Conduction

Run Hu, Sotaro Iwamoto, Lei Feng, Shenghong Ju, Shiqian Hu, Masato Ohnishi, Naomi Nagai, Kazuhiko Hirakawa, and Junichiro Shiomi

Phys. Rev. X 10, 021050 (2020) - Published 4 June, 2020

By taking into account the wavelike nature of phonons, a new superlattice design minimizes heat conduction through the material and sets the stage for new avenues of phonon engineering.

Quantum East Model: Localization, Nonthermal Eigenstates, and Slow Dynamics

Nicola Pancotti, Giacomo Giudice, J. Ignacio Cirac, Juan P. Garrahan, and Mari Carmen Bañuls

Phys. Rev. X 10, 021051 (2020) - Published 5 June, 2020

A model of interacting quantum spins shows a new mechanism for localization of quantum information without the need for disorder.

Photoelectron Diffraction Imaging of a Molecular Breakup Using an X-Ray Free-Electron Laser

Gregor Kastirke et al.

Phys. Rev. X 10, 021052 (2020) - Published 8 June, 2020

A single electron released from within an oxygen molecule by an x-ray laser “illuminates” the molecule as it breaks up, providing a first-of-its-kind movie of nuclei separating.

Hyperpolarization-Enhanced NMR Spectroscopy with Femtomole Sensitivity Using Quantum Defects in Diamond

Dominik B. Bucher, David R. Glenn, Hongkun Park, Mikhail D. Lukin, and Ronald L. Walsworth

Phys. Rev. X 10, 021053 (2020) - Published 9 June, 2020

A nitrogen-vacancy sensor with fully integrated signal enhancement by hyperpolarization boosts the sensitivity of nuclear magnetic resonance by more than 2 orders of magnitude, offering femtomole detection limits in picoliter volumes.

Fast Multiqubit Gates by Adiabatic Evolution in Interacting Excited-State Manifolds of Rydberg Atoms and Superconducting Circuits

Mohammadsadegh Khazali and Klaus Mølmer

Phys. Rev. X 10, 021054 (2020) - Published 11 June, 2020

An approach to quantum computing with Rydberg atoms or superconducting qubits suggests using multiqubit gates, rather than one- and two-qubit gates, to reduce the number of operations and errors.

Quantum Erasure Using Entangled Surface Acoustic Phonons

A. Bienfait, Y. P. Zhong, H.-S. Chang, M.-H. Chou, C. R. Conner, É. Dumur, J. Grebel, G. A. Peairs, R. G. Povey, K. J. Satzinger, and A. N. Cleland

Phys. Rev. X 10, 021055 (2020) - Published 12 June, 2020

A new experiment implements a quantum eraser using phonons rather than light, erasing information about which path a phonon travels in an interferometer to recover the interference pattern.

Stochastic Time Evolution, Information Geometry, and the Cramér-Rao Bound

Sosuke Ito and Andreas Dechant

Phys. Rev. X 10, 021056 (2020) - Published 15 June, 2020

The information encoded in a stochastic physical system sets a limit on how fast any thermodynamic observable can change, thus making a connection between the abstract concept of information and physical quantities such as heat and work.

Emerging Two-Dimensional Gauge Theories in Rydberg Configurable Arrays

Alessio Celi, Benoît Vermersch, Oscar Viyuela, Hannes Pichler, Mikhail D. Lukin, and Peter Zoller

Phys. Rev. X 10, 021057 (2020) - Published 16 June, 2020

A proposed quantum simulator could use Rydberg atoms carefully arranged with optical tweezers to simulate in real time how photons interact in two dimensions.

Fast Navigation in a Large Hilbert Space Using Quantum Optimal Control

Arthur Larrouy, Sabrina Patsch, Rémi Richaud, Jean-Michel Raimond, Michel Brune, Christiane P. Koch, and Sébastien Gleyzes

Phys. Rev. X 10, 021058 (2020) - Published 16 June, 2020

By carefully shaping radio frequency pulses, experiments show how to quickly and efficiently prepare a single atom in one of several desired states, a key ability for a variety of quantum technologies.

Unusual Dynamic Charge Correlations in Simple-Tetragonal HgBa2CuO4+δ

B. Yu, W. Tabis, I. Bialo, F. Yakhou, N. B. Brookes, Z. Anderson, Y. Tang, G. Yu, and M. Greven

Phys. Rev. X 10, 021059 (2020) - Published 16 June, 2020

Sophisticated x-ray scattering experiments reveal charge dynamics in a model cuprate compound, providing crucial insight into the connection between high-temperature superconductivity and other electronic behaviors in these materials.

Efficient Multiphoton Sampling of Molecular Vibronic Spectra on a Superconducting Bosonic Processor

Christopher S. Wang, Jacob C. Curtis, Brian J. Lester, Yaxing Zhang, Yvonne Y. Gao, Jessica Freeze, Victor S. Batista, Patrick H. Vaccaro, Isaac L. Chuang, Luigi Frunzio, Liang Jiang, S. M. Girvin, and Robert J. Schoelkopf

Phys. Rev. X 10, 021060 (2020) - Published 17 June, 2020

A quantum simulator uses microwave photons to tackle a useful chemistry problem—determining the vibronic spectra of molecules.

Many-Body Electronic Structure of NdNiO2 and CaCuO2

Jonathan Karp, Antia S. Botana, Michael R. Norman, Hyowon Park, Manuel Zingl, and Andrew Millis

Phys. Rev. X 10, 021061 (2020) - Published 17 June, 2020

A theoretical analysis reveals key similarities and differences between two compounds known to exhibit high-temperature superconductivity, setting the stage for a better understanding of this enigmatic phenomenon.

A Unification of the Holstein Polaron and Dynamic Disorder Pictures of Charge Transport in Organic Crystals

Jonathan H. Fetherolf, Denis Golež, and Timothy C. Berkelbach

Phys. Rev. X 10, 021062 (2020) - Published 17 June, 2020

By unifying two prominent theories of electron-phonon coupling, a new theoretical framework provides an efficient and realistic toolkit for improving the performance of organic-based semiconductors and superconductors.

Phonon-Phonon Interactions in Strongly Bonded Solids: Selection Rules and Higher-Order Processes

Navaneetha K. Ravichandran and David Broido

Phys. Rev. X 10, 021063 (2020) - Published 18 June, 2020

The commonly used three-phonon approximation for describing phonon collisions in crystals can fail to describe heat transport in common materials, but including collisions among four phonons offers much better matches to measurements.

Connector Tensor Networks: A Renormalization-Type Approach to Quantum Certification

Miguel Navascués, Sukhbinder Singh, and Antonio Acín

Phys. Rev. X 10, 021064 (2020) - Published 19 June, 2020

Using insights from statistical physics, a new approach to detecting quantum properties such as entanglement works for large systems and can be tailored to identify a wide variety of global collective properties.

Kolmogorovian Active Turbulence of a Sparse Assembly of Interacting Marangoni Surfers

Mickael Bourgoin, Ronan Kervil, Cecile Cottin-Bizonne, Florence Raynal, Romain Volk, and Christophe Ybert

Phys. Rev. X 10, 021065 (2020) - Published 22 June, 2020

Despite being driven by a different process, a system of self-propelling particles can evolve over time in a similar way to a turbulent fluid.

Spectral Evidence of Squeezing of a Weakly Damped Driven Nanomechanical Mode

J. S. Huber, G. Rastelli, M. J. Seitner, J. Kölbl, W. Belzig, M. I. Dykman, and E. M. Weig

Phys. Rev. X 10, 021066 (2020) - Published 23 June, 2020

A new technique for detecting “squeezed” fluctuations does so in a single measurement, as opposed to tracking phase fluctuations over time, setting the stage for improved high-resolution sensing.

Quantum Approximate Optimization Algorithm: Performance, Mechanism, and Implementation on Near-Term Devices

Leo Zhou, Sheng-Tao Wang, Soonwon Choi, Hannes Pichler, and Mikhail D. Lukin

Phys. Rev. X 10, 021067 (2020) - Published 24 June, 2020

A new parameter optimization method for a hybrid quantum-classical algorithm shows how it can exploit novel mechanisms to speed up computational time by orders of magnitude.

Disorder-Induced Transformation of the Energy Landscapes and Magnetization Dynamics in Two-Dimensional Ensembles of Dipole-Coupled Magnetic Nanoparticles

David Gallina and G. M. Pastor

Phys. Rev. X 10, 021068 (2020) - Published 25 June, 2020

Simulations show that disorder in arrangements of magnetic nanoparticles changes the nature and energy of their microscopic magnetic configurations in a profound way.

Algorithmic Complexity of Multiplex Networks

Andrea Santoro and Vincenzo Nicosia

Phys. Rev. X 10, 021069 (2020) - Published 26 June, 2020

A new measure of complexity of multilayer networks shows that these systems can encode an optimal amount of additional information compared to their single-layer counterparts and provides a powerful tool for their analysis.

Probing the Wave Function and Dynamics of the Quintet Multiexciton State with Coherent Control in a Singlet Fission Material

S. L. Bayliss, L. R. Weiss, F. Kraffert, D. B. Granger, J. E. Anthony, J. Behrends, and R. Bittl

Phys. Rev. X 10, 021070 (2020) - Published 29 June, 2020

An experimental technique allows researchers to probe and utilize the properties of enigmatic multiexciton quintet states (with a spin of 2), a state that is otherwise difficult to study but has potential applications in spin-based technologies.

One-Way Quantum Repeater Based on Near-Deterministic Photon-Emitter Interfaces

Johannes Borregaard, Hannes Pichler, Tim Schröder, Mikhail D. Lukin, Peter Lodahl, and Anders S. Sørensen

Phys. Rev. X 10, 021071 (2020) - Published 30 June, 2020

A proposed protocol for a one-way quantum repeater could enable robust long-distance quantum communication with significantly fewer resources than other proposals.

Comment on “Equilibration Time Scales of Physically Relevant Observables”

Robin Heveling, Lars Knipschild, and Jochen Gemmer

Phys. Rev. X 10, 028001 (2020) - Published 15 June, 2020

Erratum: Catalytic Quantum Randomness [Phys. Rev. X 8, 041016 (2018)]

P. Boes, H. Wilming, R. Gallego, and J. Eisert

Phys. Rev. X 10, 029901 (2020) - Published 15 April, 2020

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