Christina Stefani, Louis Ponet, Konstantin Shapovalov, Peng Chen, Eric Langenberg, Darrell G. Schlom, Sergey Artyukhin, Massimiliano Stengel, Neus Domingo, and Gustau Catalan
Phys. Rev. X 10, 041001 (2020) – Published 1 October 2020
Domain walls separating regions of opposite polarity in ferroelectric materials are mechanically softer than the domains they separate, a result that extends the distinct physics of domain walls to their mechanical properties.
Phys. Rev. X 10, 041002 (2020) – Published 2 October 2020
Calculations indicate that recently discovered superconductivity in Sr-doped NdNiO has a multiorbital electronic structure, making it unlike the superconductivity found in cuprates and instead based on a novel mechanism.
Darshana Wickramaratne, Sergii Khmelevskyi, Daniel F. Agterberg, and I. I. Mazin
Phys. Rev. X 10, 041003 (2020) – Published 5 October 2020
New theoretical work explores how the superconducting state in monolayer NbSe remains robust in large magnetic fields and sets the stage for further studies of similar Ising superconductivity in other materials.
Taran Driver, Bridgette Cooper, Ruth Ayers, Rüdiger Pipkorn, Serguei Patchkovskii, Vitali Averbukh, David R. Klug, Jon P. Marangos, Leszek J. Frasinski, and Marina Edelson-Averbukh
Phys. Rev. X 10, 041004 (2020) – Published 6 October 2020
Analysis of fluctuations in molecular fragmentation patterns reveals the structure and decomposition pathways of large, complex biomolecules.
Matthew D. Frye, Simon L. Cornish, and Jeremy M. Hutson
Phys. Rev. X 10, 041005 (2020) – Published 7 October 2020
A technique for creating high-spin molecules with electric and magnetic dipole moments offers a platform for exploring ultracold dipolar matter and its many potential applications in quantum science.
Jordan Pack, B. Jordan Russell, Yashika Kapoor, Jesse Balgley, Jeffrey Ahlers, Takashi Taniguchi, Kenji Watanabe, and Erik A. Henriksen
Phys. Rev. X 10, 041006 (2020) – Published 8 October 2020
Infrared transmission measurements reveal the collective excitations of correlated electrons in a pristine sample of graphene and the evolution from one underlying electronic ground state to another.
Daniel González-Cuadra, Luca Tagliacozzo, Maciej Lewenstein, and Alejandro Bermudez
Phys. Rev. X 10, 041007 (2020) – Published 9 October 2020
New methods for producing topological order in a material could do so under more relaxed conditions than is typically required, which could help in the development of fault-tolerant quantum computation.
Jin Si, Guan-Yu Chen, Qing Li, Xiyu Zhu, Huan Yang, and Hai-Hu Wen
Phys. Rev. X 10, 041008 (2020) – Published 12 October 2020
Under high pressure, the insulating compound CsFeSe turns into an unconventional superconductor, suggesting this system is a good one for exploring deviations from traditional Bardeen-Cooper-Schrieffer theory of superconductivity.
Suropriya Saha, Jaime Agudo-Canalejo, and Ramin Golestanian
Phys. Rev. X 10, 041009 (2020) – Published 13 October 2020
Nonreciprocal interactions among different particle species in active matter can lead to large-scale complex oscillatory patterns, according to a new model of such systems.
Theodor Lundberg, Jing Li, Louis Hutin, Benoit Bertrand, David J. Ibberson, Chang-Min Lee, David J. Niegemann, Matias Urdampilleta, Nadia Stelmashenko, Tristan Meunier, Jason W. A. Robinson, Lisa Ibberson, Maud Vinet, Yann-Michel Niquet, and M. Fernando Gonzalez-Zalba
Phys. Rev. X 10, 041010 (2020) – Published 14 October 2020
A new method for identifying spin arrangements leads to the discovery of a novel spin system—a spin quintet—in a pair of silicon quantum dots, a promising testbed for studying high-spin systems.
J. Schötz, B. Förg, W. Schweinberger, I. Liontos, H. A. Masood, A. M. Kamal, C. Jakubeit, N. G. Kling, T. Paasch-Colberg, S. Biswas, M. Högner, I. Pupeza, M. Alharbi, A. M. Azzeer, and M. F. Kling
Phys. Rev. X 10, 041011 (2020) – Published 15 October 2020
Fully understanding the phase mismatch in radiating atoms participating in high-harmonic generation is essential for generating attosecond pulses at x-ray energies and beyond.
Benjamin Morris, Benjamin Yadin, Matteo Fadel, Tilman Zibold, Philipp Treutlein, and Gerardo Adesso
Phys. Rev. X 10, 041012 (2020) – Published 16 October 2020
A new theoretical description of identical particle entanglement frames it as a useful quantum resource in frequently encountered real-world experimental settings and not just a mathematical quirk.
Michael Schüler, Umberto De Giovannini, Hannes Hübener, Angel Rubio, Michael A. Sentef, Thomas P. Devereaux, and Philipp Werner
Phys. Rev. X 10, 041013 (2020) – Published 19 October 2020
Circularly polarized light could be used to induce and detect topological states in graphene, a long-sought goal for studying the interplay between these two powerful platforms for investigations of quantum effects.
Xianxin Wu, Wladimir A. Benalcazar, Yinxiang Li, Ronny Thomale, Chao-Xing Liu, and Jiangping Hu
Phys. Rev. X 10, 041014 (2020) – Published 20 October 2020
Unconventional pairing of electrons in iron-based superconductors could provide a new class of topological superconductivity, a family of materials highly sought after for realizing robust quantum computation.
J. Götzfried, A. Döpp, M. F. Gilljohann, F. M. Foerster, H. Ding, S. Schindler, G. Schilling, A. Buck, L. Veisz, and S. Karsch
Phys. Rev. X 10, 041015 (2020) – Published 21 October 2020
A new analysis examines how increasing the amount of charge in high-energy wakefield electron accelerators influences the acceleration itself, an essential understanding for next-generation facilities.
Rahul Chajwa, Narayanan Menon, Sriram Ramaswamy, and Rama Govindarajan
Phys. Rev. X 10, 041016 (2020) – Published 22 October 2020
In a viscous fluid, a line of spheres and a line of small disks settle to the bottom in very different ways, according to new theory and experiments that shed light on natural sedimentation processes.
Mohit Pandey, Pieter W. Claeys, David K. Campbell, Anatoli Polkovnikov, and Dries Sels
Phys. Rev. X 10, 041017 (2020) – Published 23 October 2020
A new probe of quantum chaos is orders of magnitude more sensitive than standard measures and can extract information about the nontrivial dynamics close to nonchaotic regimes.
Philippe Faist, Sepehr Nezami, Victor V. Albert, Grant Salton, Fernando Pastawski, Patrick Hayden, and John Preskill
Phys. Rev. X 10, 041018 (2020) – Published 26 October 2020
A quantum code that is covariant with respect to a continuous symmetry can approximately correct the loss of a “letter” in that code, circumventing earlier no-go theorems in certain regimes.
Phys. Rev. X 10, 041020 (2020) – Published 28 October 2020
The rate at which a many-body quantum system is measured can induce a transition between a state that remembers initial conditions and one that forgets, possibly leading to new types of quantum error-correcting codes.
Phys. Rev. X 10, 041021 (2020) – Published 29 October 2020
A mathematical analysis reveals the existence of a novel type of non-Fermi liquid, an exotic metallic state governed by strong interactions between conduction electrons and a multipolar (ion) impurity.
Ignacio Bordeu, Clare Garcin, Shukry J. Habib, and Gunnar Pruessner
Phys. Rev. X 10, 041022 (2020) – Published 30 October 2020
An analysis of cell-ligand interactions from a statistical mechanics perspective shows cells act as effective force-field generators, actively organizing their environment.
Phys. Rev. X 10, 041023 (2020) – Published 2 November 2020
New extensions of a common technique for approximating strongly correlated quantum systems provides unprecedented accuracy in describing aspects of electron behavior in a large lattice of interacting electrons.
S. Alipour, A. T. Rezakhani, A. P. Babu, K. Mølmer, M. Möttönen, and T. Ala-Nissila
Phys. Rev. X 10, 041024 (2020) – Published 3 November 2020
By relating correlations between a quantum system and its environment to an uncorrelated description of the whole system, a new analytical technique provides a powerful tool for tracking correlations in open quantum system dynamics.
Benjamin Merkel, Alexander Ulanowski, and Andreas Reiserer
Phys. Rev. X 10, 041025 (2020) – Published 4 November 2020
A new platform enables controlled interactions between light and qubits while preserving their fragile quantum properties, thus providing a new path toward a quantum modem that could connect to a future quantum internet.
Aldo Glielmo, Yannic Rath, Gábor Csányi, Alessandro De Vita, and George H. Booth
Phys. Rev. X 10, 041026 (2020) – Published 5 November 2020
A new representation of the quantum wave function statistically infers the state based on knowledge of a subset of possible classical configurations, a key step for accurately simulating many-body quantum systems.
Yuto Ashida, Ataç İmamoğlu, Jérôme Faist, Dieter Jaksch, Andrea Cavalleri, and Eugene Demler
Phys. Rev. X 10, 041027 (2020) – Published 6 November 2020
A proposed mechanism for controlling the phase of matter harnesses the vacuum quantum fluctuations of light to induce superradiant-type transitions without an external drive source.
Anne Maître, Giovanni Lerario, Adrià Medeiros, Ferdinand Claude, Quentin Glorieux, Elisabeth Giacobino, Simon Pigeon, and Alberto Bramati
Phys. Rev. X 10, 041028 (2020) – Published 9 November 2020
Experiments show that dark solitons in a quantum fluid of polariton quasiparticles can bind together to form a soliton “molecule,” contrary to experiments on other quantum fluids.
Yi Xia, Vinay I. Hegde, Koushik Pal, Xia Hua, Dale Gaines, Shane Patel, Jiangang He, Muratahan Aykol, and Chris Wolverton
Phys. Rev. X 10, 041029 (2020) – Published 10 November 2020
Calculations of heat transfer properties in 37 binary cubic compounds pave the way for better thermal management design in microelectronics and energy-conversion devices.
Michael Hanks, Marta P. Estarellas, William J. Munro, and Kae Nemoto
Phys. Rev. X 10, 041030 (2020) – Published 11 November 2020
A new method for compression of quantum computing algorithms, based on ZX-calculus, greatly reduces the resources required to realize fault-tolerant quantum circuits.
Paolo Pegolo, Federico Grasselli, and Stefano Baroni
Phys. Rev. X 10, 041031 (2020) – Published 12 November 2020
The unusual properties of systems intermediate between normal metals and ionic conductors relate to topological features of the electronic ground state, leading to new insights into anomalous charge transport in electrolytes.
Phys. Rev. X 10, 041032 (2020) – Published 13 November 2020
Simulations show that molecular diffusion on 2D biological surfaces can lead to reaction rates that depend nontrivially on concentrations, an insight with profound impacts on the stability of certain biomolecular systems.
A new model helps clarify the limits of pandemic predictions, which are notoriously difficult for the near future and impossible for longer timescales.
Michele Invernizzi, Pablo M. Piaggi, and Michele Parrinello
Phys. Rev. X 10, 041034 (2020) – Published 17 November 2020
A new approach to atomic simulations combines two families of enhanced sampling to create a simpler protocol that leads to computations that are more robust and reliable.
Cristina Cîrstoiu, Kamil Korzekwa, and David Jennings
Phys. Rev. X 10, 041035 (2020) – Published 18 November 2020
A new analysis explores to what extent Noether’s theorem—relating conservation laws to symmetries—holds in open quantum systems and how it relates to physically impossible processes.
Phys. Rev. X 10, 041036 (2020) – Published 19 November 2020
A new theoretical framework for describing the dynamics of proteins diffusing and interacting in cells provides a way to understand the emergence of self-organized patterns that control cell and tissue functions.
Mushegh Rafayelyan, Jonathan Dong, Yongqi Tan, Florent Krzakala, and Sylvain Gigan
Phys. Rev. X 10, 041037 (2020) – Published 20 November 2020
Experiments show that an optical approach to neural network implementation can solve complex problems in predicting large chaotic systems, a promising step in the quest to scale up artificial neural networks.
Phys. Rev. X 10, 041039 (2020) – Published 24 November 2020
Microscopic simulations demonstrate how to optically prepare and coherently control temporal oscillations due to quantum superpositions in a gas of excitons (bound electron-hole pairs).
Timo Felser, Pietro Silvi, Mario Collura, and Simone Montangero
Phys. Rev. X 10, 041040 (2020) – Published 25 November 2020
Using a tree tensor network, a data structure developed to study many-body quantum systems on a lattice, a new analysis provides a tractable description of low-energy behavior of 2D quantum electrodynamics including matter.
Phys. Rev. X 10, 041041 (2020) – Published 30 November 2020
High photocurrent generated by terahertz radiation impinging on topological semimetals derives from profound quantum-mechanical properties of these materials.
Predicting interactions between molecules and photons is now possible with a new model that combines quantum electrodynamics and a widely used formalism from quantum chemistry.
Juliette Slootman, Victoria Waltz, C. Joshua Yeh, Christoph Baumann, Robert Göstl, Jean Comtet, and Costantino Creton
Phys. Rev. X 10, 041045 (2020) – Published 4 December 2020
Experiments with mechano-fluorescent molecules reveal that the number of broken bonds needed to grow a crack in rubbery elastomers depends strongly on molecular friction, which could aid the design of fracture-resistant materials.
Francesco Petocchi, Viktor Christiansson, Fredrik Nilsson, Ferdi Aryasetiawan, and Philipp Werner
Phys. Rev. X 10, 041047 (2020) – Published 8 December 2020
New calculations settle a debate about the importance of single-orbital versus multiorbital models in describing the electronic structure of recently discovered nickel oxide superconductors.
David Drahi, Nathan Walk, Matty J. Hoban, Aleksey K. Fedorov, Roman Shakhovoy, Akky Feimov, Yury Kurochkin, W. Steven Kolthammer, Joshua Nunn, Jonathan Barrett, and Ian A. Walmsley
Phys. Rev. X 10, 041048 (2020) – Published 9 December 2020
An experimental demonstration of a source-device-independent optical quantum random number generator—with utility in a broad range of applications—produces in real-time composably secure random numbers at a rate of 8.05 Gb/s, the fastest yet reported.
Simon Milz, Dario Egloff, Philip Taranto, Thomas Theurer, Martin B. Plenio, Andrea Smirne, and Susana F. Huelga
Phys. Rev. X 10, 041049 (2020) – Published 10 December 2020
A new paradigm for separating what is inherently quantum from what is classical relies solely on observable quantities and makes it possible to identify the mechanisms leading to nonclassicality in a wide range of situations.
Y. Kawazura, A. A. Schekochihin, M. Barnes, J. M. TenBarge, Y. Tong, K. G. Klein, and W. Dorland
Phys. Rev. X 10, 041050 (2020) – Published 11 December 2020
New simulations of plasma turbulence reveal conditions under which ions or electrons in the plasma are preferentially heated, which can inform studies of the solar wind and astrophysical accretion disks.
Daniel L. Campbell, Yun-Pil Shim, Bharath Kannan, Roni Winik, David K. Kim, Alexander Melville, Bethany M. Niedzielski, Jonilyn L. Yoder, Charles Tahan, Simon Gustavsson, and William D. Oliver
Phys. Rev. X 10, 041051 (2020) – Published 14 December 2020
A new method for controlling certain quantum bits offers fast operation of a novel composite qubit that boosts coherence times and immunity to noise, all of which could lead to improved quantum computing performance.
William Bowden, Alvise Vianello, Ian R. Hill, Marco Schioppo, and Richard Hobson
Phys. Rev. X 10, 041052 (2020) – Published 15 December 2020
A new way of matching the ticks of an optical oscillator to the quantum states of an atom relies on nondestructive measurements that could greatly improve the precision of atomic clocks.
Bo Song, Yangqian Yan, Chengdong He, Zejian Ren, Qi Zhou, and Gyu-Boong Jo
Phys. Rev. X 10, 041053 (2020) – Published 16 December 2020
Quantum simulations show that bosonization—bosonlike behavior emerging from an ensemble of fermions—can occur in 3D systems, a hypothesis that until now has been unresolved.
Marco Scigliuzzo, Andreas Bengtsson, Jean-Claude Besse, Andreas Wallraff, Per Delsing, and Simone Gasparinetti
Phys. Rev. X 10, 041054 (2020) – Published 17 December 2020
A novel type of thermometer provides a simple, fast, and accurate means to monitor the temperature of propagating microwave modes, providing a benchmarking tool for quantum computing and enabling experiments in quantum thermodynamics.
Alex Arenas, Wesley Cota, Jesús Gómez-Gardeñes, Sergio Gómez, Clara Granell, Joan T. Matamalas, David Soriano-Paños, and Benjamin Steinegger
Phys. Rev. X 10, 041055 (2020) – Published 18 December 2020
A new model tailored to describe the spread of COVID-19 provides an analytic expression for the effective reproduction number in terms of various containment attempts, a key parameter in slowing the spread of the virus.
Phys. Rev. X 10, 041056 (2020) – Published 18 December 2020
Intense x-ray pulses provide the first investigation of the fleeting electronic structure of a neon atom right after it has absorbed an x-ray photon, setting the stage for future studies of transient states of matter.
Phys. Rev. X 10, 041057 (2020) – Published 21 December 2020
A new model shows how electron fractionalization can mediate a change in a material’s Fermi surface without breaking translational symmetry, thus shedding light on recent puzzling experimental observations.
A. Muñoz de las Heras, E. Macaluso, and I. Carusotto
Phys. Rev. X 10, 041058 (2020) – Published 22 December 2020
A proposal describes a new way to search for experimental signatures of anyons, a third class of quantum particles beyond fermions and bosons with properties highly sought after for quantum computing.
Phys. Rev. X 10, 041059 (2020) – Published 23 December 2020
Close coupling between spins and phonons in a magnetic insulator underlie a thermal version of the Hall effect, insight that sheds light on this novel behavior and could lead to magnetic control of thermal currents.
Phys. Rev. X 10, 041060 (2020) – Published 24 December 2020
A new theoretical study shows that recently realized topological lasers offer competitive coherence compared to standard lasers as well as improved resilience to structural defects.
Phys. Rev. X 10, 041061 (2020) – Published 28 December 2020
Experiments determine the magnetic moment of a short-lived nucleus with parts-per-million accuracy, an improvement by several orders of magnitude thanks to a -NMR setup at CERN.
Nikola Maksimovic, Ian M. Hayes, Vikram Nagarajan, James G. Analytis, Alexei E. Koshelev, John Singleton, Yeonbae Lee, and Thomas Schenkel
Phys. Rev. X 10, 041062 (2020) – Published 29 December 2020
Unusual changes in electrical resistance in an iron-based superconductor arise from magnetic fluctuations that dissipate the momenta of charge carriers, according to new experimental data and theoretical analysis.
Chang Liu, Yunbo Ou, Yang Feng, Gaoyuan Jiang, Weixiong Wu, Shaorui Li, Zijia Cheng, Ke He, Xucun Ma, Qikun Xue, and Yayu Wang
Phys. Rev. X 10, 041063 (2020) – Published 30 December 2020
A study of charge transport in magnetic topological insulators reveals two distinct ground states in the quantum anomalous Hall effect, thus showing rich physics unique to this exotic phase.
N. Zaïm, D. Guénot, L. Chopineau, A. Denoeud, O. Lundh, H. Vincenti, F. Quéré, and J. Faure
Phys. Rev. X 10, 041064 (2020) – Published 31 December 2020
Spatially shaping a femtosecond laser to produce radially polarized pulses produces an electric field that pushes electrons in vacuum to relativistic speeds in the direction of laser propagation.