Phys. Rev. X 11, 021001 (2021) – Published 1 April 2021
A numerical study of 3D droplets of active matter reveals many dynamical responses to a microscopic influx of energy, such as fingerlike protrusions and surface wrinkling, offering new physics insight into life sciences.
Phys. Rev. X 11, 021002 (2021) – Published 2 April 2021
Predicting effective characteristics of electromagnetic waves in composite media is an old problem with limited solutions. A new theoretical framework overcomes those limitations.
Phys. Rev. X 11, 021003 (2021) – Published 5 April 2021
A new method for analyzing summaries of network structure given by clustering algorithms provides a way to characterize competing solutions and extract more meaningful results.
Kaizad Rustomji, Marc Dubois, Pierre Jomin, Stefan Enoch, Jérôme Wenger, C. Martijn de Sterke, and Redha Abdeddaim
Phys. Rev. X 11, 021004 (2021) – Published 5 April 2021
The Green function is a crucial description of a system’s response to an impulse but is challenging to measure experimentally. A new measurement technique fully characterizes the function for a resonant planar cavity.
Phys. Rev. X 11, 021005 (2021) – Published 6 April 2021
By identifying how fractional electron filling manifests in effective field theory, a new analysis offers a more general way to understand certain collective behaviors of electrons in a solid.
Phys. Rev. X 11, 021006 (2021) – Published 6 April 2021
A new framework for “quantum embedding methods,” which enable tractable predictions of correlated electron materials, improves accuracy by avoiding approximations used by previous approaches.
Meryem Benelajla, Elena Kammann, Bernhard Urbaszek, and Khaled Karrai
Phys. Rev. X 11, 021007 (2021) – Published 7 April 2021
A surprisingly large suppression of laser light in confocal microscopy studies of resonant fluorescence has its origins in a small shift of polarized light reflecting off smooth surfaces.
Asmi Haldar, Diptiman Sen, Roderich Moessner, and Arnab Das
Phys. Rev. X 11, 021008 (2021) – Published 7 April 2021
The commonly expected infinite-temperature-like state in a periodically driven homogeneous system of interacting particles can be avoided if the system is quantum mechanical and the drive is strong enough.
Francesco Fogliano, Benjamin Besga, Antoine Reigue, Philip Heringlake, Laure Mercier de Lépinay, Cyril Vaneph, Jakob Reichel, Benjamin Pigeau, and Olivier Arcizet
Phys. Rev. X 11, 021009 (2021) – Published 8 April 2021
A silicon carbide nanowire suspended in an optical microcavity serves to map the strength and orientation of the optomechanical interaction, down to the single-photon level.
M. S. Blok, V. V. Ramasesh, T. Schuster, K. O’Brien, J. M. Kreikebaum, D. Dahlen, A. Morvan, B. Yoshida, N. Y. Yao, and I. Siddiqi
Phys. Rev. X 11, 021010 (2021) – Published 9 April 2021
A quantum processor based on three-level “qutrits,” as opposed to two-level qubits, successfully runs a quantum teleportation algorithm in a proof-of-concept demonstration of resource-efficient three-level systems.
Phys. Rev. X 11, 021011 (2021) – Published 12 April 2021
Bubbles in helium droplets form around excited atoms and greatly accelerate interatomic Coulombic decay, showing how environment enhances this biologically relevant energy-sharing process among atoms and molecules.
Hailong Fu, Ke Huang, Kenji Watanabe, Takashi Taniguchi, and Jun Zhu
Phys. Rev. X 11, 021012 (2021) – Published 13 April 2021
An all-electrical technique resolves the dispersion relation of spin waves in bilayer graphene, shedding light on the magnetic order of a quantum Hall canted antiferromagnet.
Gong Chen, MacCallum Robertson, Markus Hoffmann, Colin Ophus, André L. Fernandes Cauduro, Roberto Lo Conte, Haifeng Ding, Roland Wiesendanger, Stefan Blügel, Andreas K. Schmid, and Kai Liu
Phys. Rev. X 11, 021015 (2021) – Published 16 April 2021
Adsorption of hydrogen onto a ferromagnetic surface induces and controls a winding arrangement of magnetic moments potentially useful in future energy-efficient information applications.
Shun-Ye Gao, Sheng Xu, Hang Li, Chang-Jiang Yi, Si-Min Nie, Zhi-Cheng Rao, Huan Wang, Quan-Xin Hu, Xue-Zhi Chen, Wen-Hui Fan, Jie-Rui Huang, Yao-Bo Huang, Nini Pryds, Ming Shi, Zhi-Jun Wang, You-Guo Shi, Tian-Long Xia, Tian Qian, and Hong Ding
Phys. Rev. X 11, 021016 (2021) – Published 19 April 2021
Observations of an ideal magnetic topological state in the ferromagnet EuB offer the promise of realizing novel electronic and magnetic states in 2D materials.
Sandip Mandal, Maxime Nicolas, and Olivier Pouliquen
Phys. Rev. X 11, 021017 (2021) – Published 20 April 2021
A numerical investigation of flow behavior in a cohesive granular material reveals complex dynamics that may help improve industrial applications that rely on powders.
Shengchun Shen, Zhuolu Li, Zijun Tian, Weidong Luo, Satoshi Okamoto, and Pu Yu
Phys. Rev. X 11, 021018 (2021) – Published 21 April 2021
A voltage-controlled transition from a non-Fermi-liquid state in a metal to a typical Fermi-liquid state precedes the onset of ferromagnetism, new experiments show.
Phys. Rev. X 11, 021019 (2021) – Published 22 April 2021
A new framework for analyzing resources in quantum information processing shows how quantum superposition offers a novel advantage in memory usage compared with classical devices.
Alexander S. Kuznetsov, Diego H. O. Machado, Klaus Biermann, and Paulo V. Santos
Phys. Rev. X 11, 021020 (2021) – Published 23 April 2021
A new platform based on a hybrid optomechanical microcavity for coupling of electrically excited gigahertz phonons and exciton-polaritons provides a coherent interface between microwave and near-infrared photons.
C. J. Turner, J.-Y. Desaules, K. Bull, and Z. Papić
Phys. Rev. X 11, 021021 (2021) – Published 26 April 2021
A correspondence principle between classical periodic orbits and quantum states of Rydberg atom chains sheds light on “quantum many-body scarring,” in which these chains repeatedly revisit their initial states.
Geoffrey Ji, Muqing Xu, Lev Haldar Kendrick, Christie S. Chiu, Justus C. Brüggenjürgen, Daniel Greif, Annabelle Bohrdt, Fabian Grusdt, Eugene Demler, Martin Lebrat, and Markus Greiner
Phys. Rev. X 11, 021022 (2021) – Published 27 April 2021
Using an optical lattice of cold atoms, quantum simulation of a single electron hole added to an antiferromagnet reveals how the hole alters the spin environment and how the spins slow down the hole.
Shovon Pal, Nives Strkalj, Chia-Jung Yang, Mads C. Weber, Morgan Trassin, Michael Woerner, and Manfred Fiebig
Phys. Rev. X 11, 021023 (2021) – Published 28 April 2021
Terahertz spectroscopy reveals the microscopic dynamics underlying soft vibrational modes in a ferroelectric material, providing inroads to all-optical control of nonlinear functional materials.
Natalia Martín-González, Pablo Ibáñez-Freire, Álvaro Ortega-Esteban, Mara Laguna-Castro, Carmen San Martín, Alejandro Valbuena, Rafael Delgado-Buscalioni, and Pedro J. de Pablo
Phys. Rev. X 11, 021025 (2021) – Published 30 April 2021
The disassembly of a virus’ protein shell must happen at the right time to ensure transfer of the viral genome to its host. New experiments reveal that aging determines the dynamics of this unraveling.
Yuya Shimazaki, Clemens Kuhlenkamp, Ido Schwartz, Tomasz Smoleński, Kenji Watanabe, Takashi Taniguchi, Martin Kroner, Richard Schmidt, Michael Knap, and Ataç Imamoğlu
Phys. Rev. X 11, 021027 (2021) – Published 4 May 2021
Optical spectroscopy provides direct evidence of electrons organizing themselves into a periodic distribution in the correlated insulating state of a twisted bilayer 2D semiconductor.
Salvatore Torquato, Jaeuk Kim, and Michael A. Klatt
Phys. Rev. X 11, 021028 (2021) – Published 5 May 2021
A theoretical and numerical study stresses the importance of higher-order moments of density fluctuations in characterizing models of many-body systems.
Lukáš Nádvorník, Martin Borchert, Liane Brandt, Richard Schlitz, Koen A. de Mare, Karel Výborný, Ingrid Mertig, Gerhard Jakob, Matthias Kläui, Sebastian T. B. Goennenwein, Martin Wolf, Georg Woltersdorf, and Tobias Kampfrath
Phys. Rev. X 11, 021030 (2021) – Published 7 May 2021
In magnetic metals, electrical resistance depends on the direction of magnetization relative to the current. New experiments show that this effect does not depend solely on electron collisions, as is typically assumed.
Phys. Rev. X 11, 021032 (2021) – Published 11 May 2021
A new theoretical framework connects the fluctuations in gene expression with fundamental cell dynamics including cellular division and DNA replication.
Yaohua Liu, Lin-Lin Wang, Qiang Zheng, Zengle Huang, Xiaoping Wang, Miaofang Chi, Yan Wu, Bryan C. Chakoumakos, Michael A. McGuire, Brian C. Sales, Weida Wu, and Jiaqiang Yan
Phys. Rev. X 11, 021033 (2021) – Published 12 May 2021
Randomly distributed atomic-level defects in the magnetic topological insulator MnSbTe help stabilize ferromagnetic interactions but are detrimental to topological electronic properties.
Samuel Häusler, Philipp Fabritius, Jeffrey Mohan, Martin Lebrat, Laura Corman, and Tilman Esslinger
Phys. Rev. X 11, 021034 (2021) – Published 13 May 2021
By tuning interatomic interactions among cold atoms, new experimental work demonstrates a device in which the magnitude and direction of a thermoelectric current can be controlled.
Phys. Rev. X 11, 021035 (2021) – Published 14 May 2021
A new algorithm for solving a large 2D grid of interacting particles provides much more accurate predictions of how such systems interact with their environment than previous techniques.
Elmer Guardado-Sanchez, Benjamin M. Spar, Peter Schauss, Ron Belyansky, Jeremy T. Young, Przemyslaw Bienias, Alexey V. Gorshkov, Thomas Iadecola, and Waseem S. Bakr
Phys. Rev. X 11, 021036 (2021) – Published 17 May 2021
Alexander Altland, Michael Fleischhauer, and Sebastian Diehl
Phys. Rev. X 11, 021037 (2021) – Published 18 May 2021
A generalization of fundamental symmetry classes of fermionic quantum matter to out-of-equilibrium systems provides a framework for engineering novel quantum phases.
Jack M. Bartlett, Alexander Steppke, Suguru Hosoi, Hilary Noad, Joonbum Park, Carsten Timm, Takasada Shibauchi, Andrew P. Mackenzie, and Clifford W. Hicks
Phys. Rev. X 11, 021038 (2021) – Published 19 May 2021
Resistive anisotropy grows then shrinks following the onset of electronic nematicity in FeSe, a key observation of how the electronic structure of FeSe changes as nematicity develops.
Phys. Rev. X 11, 021041 (2021) – Published 24 May 2021
Time lag in how an environment responds to a quantum device complicates analyses of these systems, but an elegant workaround provides a way to proceed as if there were no lag at all.
Phys. Rev. X 11, 021042 (2021) – Published 25 May 2021
A mathematical analysis shows how changes in the brightness and polarization of light emitted by excitons in a transition-metal dichalcogenide bilayer is a powerful probe of exciton behavior.
Elie Wolfe, Alejandro Pozas-Kerstjens, Matan Grinberg, Denis Rosset, Antonio Acín, and Miguel Navascués
Phys. Rev. X 11, 021043 (2021) – Published 26 May 2021
Quantum inflation offers the mathematical tools to identify and quantify causal relationships among quantum systems with ready applications to entanglement theory and quantum information protocols.
Menachem Stern, Daniel Hexner, Jason W. Rocks, and Andrea J. Liu
Phys. Rev. X 11, 021045 (2021) – Published 28 May 2021
A proposed approach could allow physical networks to learn how to adapt to stimuli and gain desired functionalities, exporting a machine-learning methodology to real materials and machines.
Pengjie Wang, Zheng Gong, Seong Geun Lee, Yinren Shou, Yixing Geng, Cheonha Jeon, I Jong Kim, Hwang Woon Lee, Jin Woo Yoon, Jae Hee Sung, Seong Ku Lee, Defeng Kong, Jianbo Liu, Zhusong Mei, Zhengxuan Cao, Zhuo Pan, Il Woo Choi, Xueqing Yan, Chang Hee Nam, and Wenjun Ma
Phys. Rev. X 11, 021049 (2021) – Published 3 June 2021
Laser ion acceleration driven by the utmost intense laser pulses pushes superheavy gold ions to unprecedented energies, key for applications ranging from nuclear physics to next-generation accelerators.
Phys. Rev. X 11, 021051 (2021) – Published 7 June 2021
A new framework for analyzing chaotic quantum systems with local interactions identifies generic many-body interference effects, with strong implications for quantum spectra.
Vittorio Peano, Florian Sapper, and Florian Marquardt
Phys. Rev. X 11, 021052 (2021) – Published 8 June 2021
A neural network maps arbitrary nanostructure patterns to their wave band structures and finds geometries that support desired wave propagation behavior, a key advance in tailoring wave transport in nanodevices.
B. D. Faeth, S.-L. Yang, J. K. Kawasaki, J. N. Nelson, P. Mishra, C. T. Parzyck, C. Li, D. G. Schlom, and K. M. Shen
Phys. Rev. X 11, 021054 (2021) – Published 10 June 2021
A monolayer of FeSe atop SrTiO displays enhanced high-temperature superconductivity. New measurements reveal a sharp distinction between the appearance of a superconducting energy gap and true zero resistivity.
F. Salehi, M. Le, L. Railing, M. Kolesik, and H. M. Milchberg
Phys. Rev. X 11, 021055 (2021) – Published 11 June 2021
A demonstration of high-quality electron beams from a plasma accelerator driven by a low-energy, few-cycle duration laser pulse showcases a promising low-cost alternative to large traditional accelerators.
Taiki Yanagishima, Yanyan Liu, Hajime Tanaka, and Roel P. A. Dullens
Phys. Rev. X 11, 021056 (2021) – Published 14 June 2021
A method for visualizing rotation of micrometer-sized spheres reveals for the first time how hydrodynamic and frictional effects affect rotational motion in particulate suspensions.
Tomer Markovich, Étienne Fodor, Elsen Tjhung, and Michael E. Cates
Phys. Rev. X 11, 021057 (2021) – Published 15 June 2021
A novel thermodynamic framework extends the notion of heat to active materials as a tool to quantify the energetic cost of sustaining nonequilibrium patterns in these active systems.
Youngkyu Sung, Leon Ding, Jochen Braumüller, Antti Vepsäläinen, Bharath Kannan, Morten Kjaergaard, Ami Greene, Gabriel O. Samach, Chris McNally, David Kim, Alexander Melville, Bethany M. Niedzielski, Mollie E. Schwartz, Jonilyn L. Yoder, Terry P. Orlando, Simon Gustavsson, and William D. Oliver
Phys. Rev. X 11, 021058 (2021) – Published 16 June 2021
Two-qubit gate errors remain a major bottleneck on the road to robust quantum computing. A new approach to designing a key element of such gates dramatically improves their fidelity.
Daniel J. Korchinski, Javier G. Orlandi, Seung-Woo Son, and Jörn Davidsen
Phys. Rev. X 11, 021059 (2021) – Published 17 June 2021
External input introduced to a spreading cascade in a network fundamentally alters the growth of that cascade—a new insight with implications for understanding brain dynamics.
Alexander Mook, Kirill Plekhanov, Jelena Klinovaja, and Daniel Loss
Phys. Rev. X 11, 021061 (2021) – Published 22 June 2021
Particle number nonconservation in interactions among magnons in ferromagnet models reveal a topological phase transition, which opens possibilities for energy-efficient magnetic information processing.
Marko D. Petrović, Priyanka Mondal, Adrian E. Feiguin, Petr Plecháč, and Branislav K. Nikolić
Phys. Rev. X 11, 021062 (2021) – Published 23 June 2021
A synergy between strongly electron-correlated physics, quantum transport theory, and quantum information science provides a long-sought quantum-mechanical description of spin torque, an effect at the heart of spintronic research.
Natalia Vladimirova, Michal Shavit, and Gregory Falkovich
Phys. Rev. X 11, 021063 (2021) – Published 24 June 2021
Two distinct classes of turbulence are studied through the lens of statistical physics, but a certain kind of discrete model bridges these classes and can describe both.
Christian Keup, Tobias Kühn, David Dahmen, and Moritz Helias
Phys. Rev. X 11, 021064 (2021) – Published 25 June 2021
A framework for comparing models of neural networks provides insight into how the brain can support powerful computations despite its strongly chaotic electrical activity.
Junseong Song, Sunghun Kim, Youngkuk Kim, Huixia Fu, Jahyun Koo, Zhen Wang, Gyubin Lee, Jouhahn Lee, Sang Ho Oh, Joonho Bang, Taku Matsushita, Nobuo Wada, Hiroki Ikegami, Jonathan D. Denlinger, Young Hee Lee, Binghai Yan, Yeongkwan Kim, and Sung Wng Kim
Phys. Rev. X 11, 021065 (2021) – Published 28 June 2021
A newly discovered 3D topological Dirac semimetal exhibits surface superconductivity at ambient pressure, a key step in the development of systems sought after for quantum computation.
Phys. Rev. X 11, 021067 (2021) – Published 30 June 2021
A theoretical and computational analysis shows that it is possible to precisely control the optical properties of a material by optically exciting crystalline lattice vibrations, or phonons.
Mario Motta, David M. Ceperley, Garnet Kin-Lic Chan, John A. Gomez, Emanuel Gull, Sheng Guo, Carlos A. Jiménez-Hoyos, Tran Nguyen Lan, Jia Li, Fengjie Ma, Andrew J. Millis, Nikolay V. Prokof’ev, Ushnish Ray, Gustavo E. Scuseria, Sandro Sorella, Edwin M. Stoudenmire, Qiming Sun, Igor S. Tupitsyn, Steven R. White, Dominika Zgid, and Shiwei Zhang
Phys. Rev. X 11, 029901 (2021) – Published 6 April 2021