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PHYSICS (590 journals)

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Journal Cover Physical Review X
  [SJR: 5.04]   [H-I: 38]   [12 followers]  Follow
    
  This is an Open Access Journal Open Access journal
   ISSN (Online) 2160-3308
   Published by APS Homepage  [11 journals]
  • Editorial: A Tale of Two Anniversaries: 125 Years of the Physical Review
           and 25 Years of Physical Review E

    • Authors: Matthew Salter; Michael Thoennessen
      First page: 010001
      Abstract: Author(s): Matthew Salter and Michael Thoennessen
      [Phys. Rev. X 8, 010001] Published Tue Jan 02, 2018
      Citation: Phys. Rev. X 8, 010001 (2018)
      PubDate: 2018-01-02T10:00:00+00:00
      DOI: 10.1103/PhysRevX.8.010001
      Issue No: Vol. 8, No. 1 (2018)
       
  • Announcement: Corrections in Physical Review Publications

    • First page: 010002
      Abstract: [Phys. Rev. X 8, 010002] Published Wed Jan 03, 2018
      Citation: Phys. Rev. X 8, 010002 (2018)
      PubDate: 2018-01-03T10:00:00+00:00
      DOI: 10.1103/PhysRevX.8.010002
      Issue No: Vol. 8, No. 1 (2018)
       
  • Observation of Accelerating Wave Packets in Curved Space

    • Authors: Anatoly Patsyk; Miguel A. Bandres, Rivka Bekenstein, Mordechai Segev
      First page: 011001
      Abstract: Author(s): Anatoly Patsyk, Miguel A. Bandres, Rivka Bekenstein, and Mordechai Segev
      Using a combination of light-bending techniques, researchers have demonstrated a light beam that accelerates in a curved space.
      [Phys. Rev. X 8, 011001] Published Thu Jan 04, 2018
      Citation: Phys. Rev. X 8, 011001 (2018)
      PubDate: 2018-01-04T10:00:00+00:00
      DOI: 10.1103/PhysRevX.8.011001
      Issue No: Vol. 8, No. 1 (2018)
       
  • Tunable-Range, Photon-Mediated Atomic Interactions in Multimode Cavity QED

    • Authors: Varun D. Vaidya; Yudan Guo, Ronen M. Kroeze, Kyle E. Ballantine, Alicia J. Kollár, Jonathan Keeling, Benjamin L. Lev
      First page: 011002
      Abstract: Author(s): Varun D. Vaidya, Yudan Guo, Ronen M. Kroeze, Kyle E. Ballantine, Alicia J. Kollár, Jonathan Keeling, and Benjamin L. Lev
      A tunable multimode optical cavity modifies interactions between atomic condensates trapped in its interior from long range to short range, paving the way towards exploring novel collective quantum phenomena.
      [Phys. Rev. X 8, 011002] Published Mon Jan 08, 2018
      Citation: Phys. Rev. X 8, 011002 (2018)
      PubDate: 2018-01-08T10:00:00+00:00
      DOI: 10.1103/PhysRevX.8.011002
      Issue No: Vol. 8, No. 1 (2018)
       
  • Rigorous Free-Fermion Entanglement Renormalization from Wavelet Theory

    • Authors: Jutho Haegeman; Brian Swingle, Michael Walter, Jordan Cotler, Glen Evenbly, Volkher B. Scholz
      First page: 011003
      Abstract: Author(s): Jutho Haegeman, Brian Swingle, Michael Walter, Jordan Cotler, Glen Evenbly, and Volkher B. Scholz
      The preparation of particular quantum states will be essential to future quantum computers, and one approach is to manipulate electrons and their interactions. A new analysis provides rigorous preparation procedures for metallic states in one and two dimensions.
      [Phys. Rev. X 8, 011003] Published Tue Jan 09, 2018
      Citation: Phys. Rev. X 8, 011003 (2018)
      PubDate: 2018-01-09T10:00:00+00:00
      DOI: 10.1103/PhysRevX.8.011003
      Issue No: Vol. 8, No. 1 (2018)
       
  • Thermodynamics of Fluid Polyamorphism

    • Authors: Mikhail A. Anisimov; Michal Duška, Frédéric Caupin, Lauren E. Amrhein, Amanda Rosenbaum, Richard J. Sadus
      First page: 011004
      Abstract: Author(s): Mikhail A. Anisimov, Michal Duška, Frédéric Caupin, Lauren E. Amrhein, Amanda Rosenbaum, and Richard J. Sadus
      A new theoretical framework provides a unified picture for describing fluid polyamorphism (the existence of different condensed amorphous states in a single-component fluid) independently of the underlying molecular organization, and it provides new insights into a broad range of similar states.
      [Phys. Rev. X 8, 011004] Published Wed Jan 10, 2018
      Citation: Phys. Rev. X 8, 011004 (2018)
      PubDate: 2018-01-10T10:00:00+00:00
      DOI: 10.1103/PhysRevX.8.011004
      Issue No: Vol. 8, No. 1 (2018)
       
  • Multiferroic Magnetic Spirals Induced by Random Magnetic Exchanges

    • Authors: Andrea Scaramucci; Hiroshi Shinaoka, Maxim V. Mostovoy, Markus Müller, Christopher Mudry, Matthias Troyer, Nicola A. Spaldin
      First page: 011005
      Abstract: Author(s): Andrea Scaramucci, Hiroshi Shinaoka, Maxim V. Mostovoy, Markus Müller, Christopher Mudry, Matthias Troyer, and Nicola A. Spaldin
      Multiferroic materials could provide a low-energy approach to magnetic data storage. However, one of the most promising physical mechanisms giving rise to multiferroism—spiral magnetic order—usually appears way below room temperature. New simulations and calculations show a way to stabilize this magnetic order at relatively high temperatures in the multiferroic compound YBaFeCuO5.
      [Phys. Rev. X 8, 011005] Published Wed Jan 10, 2018
      Citation: Phys. Rev. X 8, 011005 (2018)
      PubDate: 2018-01-10T10:00:00+00:00
      DOI: 10.1103/PhysRevX.8.011005
      Issue No: Vol. 8, No. 1 (2018)
       
  • Neural-Network Quantum States, String-Bond States, and Chiral Topological
           States

    • Authors: Ivan Glasser; Nicola Pancotti, Moritz August, Ivan D. Rodriguez, J. Ignacio Cirac
      First page: 011006
      Abstract: Author(s): Ivan Glasser, Nicola Pancotti, Moritz August, Ivan D. Rodriguez, and J. Ignacio Cirac
      Two tools show great promise in approximating low-temperature, condensed-matter systems: Tensor-network states and artificial neural networks. A new analysis builds a bridge between these techniques, opening the way to a host of powerful approaches to understanding complex quantum systems.
      [Phys. Rev. X 8, 011006] Published Thu Jan 11, 2018
      Citation: Phys. Rev. X 8, 011006 (2018)
      PubDate: 2018-01-11T10:00:00+00:00
      DOI: 10.1103/PhysRevX.8.011006
      Issue No: Vol. 8, No. 1 (2018)
       
  • Integrable Families of Hard-Core Particles with Unequal Masses in a
           One-Dimensional Harmonic Trap

    • Authors: N. L. Harshman; Maxim Olshanii, A. S. Dehkharghani, A. G. Volosniev, Steven Glenn Jackson, N. T. Zinner
      First page: 041001
      Abstract: Author(s): N. L. Harshman, Maxim Olshanii, A. S. Dehkharghani, A. G. Volosniev, Steven Glenn Jackson, and N. T. Zinner
      A new solvable model of interacting quantum particles exhibits a broader range of dynamical behavior than previous models, which could provide experimentalists with better insight into mixed-mass ensembles of particles.
      [Phys. Rev. X 7, 041001] Published Wed Oct 04, 2017
      Citation: Phys. Rev. X 7, 041001 (2017)
      PubDate: 2017-10-04T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041001
      Issue No: Vol. 7, No. 4 (2017)
       
  • Globally Stable Microresonator Turing Pattern Formation for Coherent
           High-Power THz Radiation On-Chip

    • Authors: Shu-Wei Huang; Jinghui Yang, Shang-Hua Yang, Mingbin Yu, Dim-Lee Kwong, T. Zelevinsky, Mona Jarrahi, Chee Wei Wong
      First page: 041002
      Abstract: Author(s): Shu-Wei Huang, Jinghui Yang, Shang-Hua Yang, Mingbin Yu, Dim-Lee Kwong, T. Zelevinsky, Mona Jarrahi, and Chee Wei Wong
      Next-generation wireless communication networks will require powerful, stable sources of electromagnetic radiation operating at terahertz frequencies. A new study demonstrates the feasibility of such a source by combing a microscale cavity with a photomixer.
      [Phys. Rev. X 7, 041002] Published Thu Oct 05, 2017
      Citation: Phys. Rev. X 7, 041002 (2017)
      PubDate: 2017-10-05T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041002
      Issue No: Vol. 7, No. 4 (2017)
       
  • Ultrabright GeV Photon Source via Controlled Electromagnetic Cascades in
           Laser-Dipole Waves

    • Authors: A. Gonoskov; A. Bashinov, S. Bastrakov, E. Efimenko, A. Ilderton, A. Kim, M. Marklund, I. Meyerov, A. Muraviev, A. Sergeev
      First page: 041003
      Abstract: Author(s): A. Gonoskov, A. Bashinov, S. Bastrakov, E. Efimenko, A. Ilderton, A. Kim, M. Marklund, I. Meyerov, A. Muraviev, and A. Sergeev
      Laser-matter collisions can generate flashes of energetic particles, but attempts to create high-energy photon sources from such interactions quickly run into limitations on energy. New results show how to exploit fundamental physical processes, such as the creation of antimatter from light, to overcome these limits and create an efficient, ultrabright source of giga-electron-volt photons, with capabilities far surpassing those of other sources.
      [Phys. Rev. X 7, 041003] Published Fri Oct 06, 2017
      Citation: Phys. Rev. X 7, 041003 (2017)
      PubDate: 2017-10-06T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041003
      Issue No: Vol. 7, No. 4 (2017)
       
  • Ground-State Thermodynamic Quantities of Homogeneous Spin-$1/2$ Fermions
           from the BCS Region to the Unitarity Limit

    • Authors: Munekazu Horikoshi; Masato Koashi, Hiroyuki Tajima, Yoji Ohashi, Makoto Kuwata-Gonokami
      First page: 041004
      Abstract: Author(s): Munekazu Horikoshi, Masato Koashi, Hiroyuki Tajima, Yoji Ohashi, and Makoto Kuwata-Gonokami
      Understanding the physical properties of Fermi superfluids is a key step toward the development of high-temperature superconductors as well as insight into the inner workings of neutron stars. New experiments reveal the first comprehensive measurements of thermodynamic properties of fermions in a superfluid with enough accuracy to compare models for how these particles interact.
      [Phys. Rev. X 7, 041004] Published Wed Oct 11, 2017
      Citation: Phys. Rev. X 7, 041004 (2017)
      PubDate: 2017-10-11T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041004
      Issue No: Vol. 7, No. 4 (2017)
       
  • How Confinement-Induced Structures Alter the Contribution of Hydrodynamic
           and Short-Ranged Repulsion Forces to the Viscosity of Colloidal
           Suspensions

    • Authors: Meera Ramaswamy; Neil Y. C. Lin, Brian D. Leahy, Christopher Ness, Andrew M. Fiore, James W. Swan, Itai Cohen
      First page: 041005
      Abstract: Author(s): Meera Ramaswamy, Neil Y. C. Lin, Brian D. Leahy, Christopher Ness, Andrew M. Fiore, James W. Swan, and Itai Cohen
      Understanding the flow of complex fluids through confined spaces, and forces governing the flow, is key to diverse fields, from blood flow to lubricant design. But studying such situations is difficult because typical devices can’t achieve the necessary degree of confinement. New experiments and simulations reveal flow behavior under different levels of confinement and show how this behavior can be tuned.
      [Phys. Rev. X 7, 041005] Published Thu Oct 12, 2017
      Citation: Phys. Rev. X 7, 041005 (2017)
      PubDate: 2017-10-12T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041005
      Issue No: Vol. 7, No. 4 (2017)
       
  • Tuning across Universalities with a Driven Open Condensate

    • Authors: A. Zamora; L. M. Sieberer, K. Dunnett, S. Diehl, M. H. Szymańska
      First page: 041006
      Abstract: Author(s): A. Zamora, L. M. Sieberer, K. Dunnett, S. Diehl, and M. H. Szymańska
      Different complex systems can exhibit remarkably similar behavior, a concept known as universality. Defining different classes of universality for driven nonequilibrium systems, however, is difficult. A new analysis shows how one of these classes—the Kardar-Parisi-Zhang class—can be experimentally realized using a fluid of exciton-polaritons and how the universal behavior can be changed by making this system strongly anisotropic.
      [Phys. Rev. X 7, 041006] Published Fri Oct 13, 2017
      Citation: Phys. Rev. X 7, 041006 (2017)
      PubDate: 2017-10-13T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041006
      Issue No: Vol. 7, No. 4 (2017)
       
  • Light Microscopy at Maximal Precision

    • Authors: Matthew Bierbaum; Brian D. Leahy, Alexander A. Alemi, Itai Cohen, James P. Sethna
      First page: 041007
      Abstract: Author(s): Matthew Bierbaum, Brian D. Leahy, Alexander A. Alemi, Itai Cohen, and James P. Sethna
      A theoretical model of light spreading and scattering improves accuracy precision of position and size measurements made with an optical microscope by as much as 100 times.
      [Phys. Rev. X 7, 041007] Published Fri Oct 13, 2017
      Citation: Phys. Rev. X 7, 041007 (2017)
      PubDate: 2017-10-13T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041007
      Issue No: Vol. 7, No. 4 (2017)
       
  • Topological Frequency Conversion in Strongly Driven Quantum Systems

    • Authors: Ivar Martin; Gil Refael, Bertrand Halperin
      First page: 041008
      Abstract: Author(s): Ivar Martin, Gil Refael, and Bertrand Halperin
      Spatial dimensionality of a system determines the types of phenomena it can exhibit. A new analysis shows how the dimensionality of a single spin-1/2 particle can be effectively increased by applying a drive with two incommensurate frequencies, thereby dynamically inducing an exotic topological phase of matter.
      [Phys. Rev. X 7, 041008] Published Mon Oct 16, 2017
      Citation: Phys. Rev. X 7, 041008 (2017)
      PubDate: 2017-10-16T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041008
      Issue No: Vol. 7, No. 4 (2017)
       
  • Adaptive Quantum Metrology under General Markovian Noise

    • Authors: Rafał Demkowicz-Dobrzański; Jan Czajkowski, Pavel Sekatski
      First page: 041009
      Abstract: Author(s): Rafał Demkowicz-Dobrzański, Jan Czajkowski, and Pavel Sekatski
      Quantum metrology is a technique for using principles of quantum theory to make ultraprecise measurements of physical systems, however, its effectiveness is frequently hampered by environmental noise. A new theoretical analysis provides criteria for knowing whether noise will impact a measurement and if corrections are possible.
      [Phys. Rev. X 7, 041009] Published Mon Oct 16, 2017
      Citation: Phys. Rev. X 7, 041009 (2017)
      PubDate: 2017-10-16T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041009
      Issue No: Vol. 7, No. 4 (2017)
       
  • Free-Space Quantum Electrodynamics with a Single Rydberg Superatom

    • Authors: Asaf Paris-Mandoki; Christoph Braun, Jan Kumlin, Christoph Tresp, Ivan Mirgorodskiy, Florian Christaller, Hans Peter Büchler, Sebastian Hofferberth
      First page: 041010
      Abstract: Author(s): Asaf Paris-Mandoki, Christoph Braun, Jan Kumlin, Christoph Tresp, Ivan Mirgorodskiy, Florian Christaller, Hans Peter Büchler, and Sebastian Hofferberth
      Engineering a strong interaction between a single photon and emitter could lead to novel quantum optical devices but generally requires confining the light inside a cavity. New experiments get around this requirement by coupling a few photons to a single superatom—thousands of atoms behaving as a single entity.
      [Phys. Rev. X 7, 041010] Published Tue Oct 17, 2017
      Citation: Phys. Rev. X 7, 041010 (2017)
      PubDate: 2017-10-17T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041010
      Issue No: Vol. 7, No. 4 (2017)
       
  • Magnetic Resonance with Squeezed Microwaves

    • Authors: A. Bienfait; P. Campagne-Ibarcq, A. H. Kiilerich, X. Zhou, S. Probst, J. J. Pla, T. Schenkel, D. Vion, D. Esteve, J. J. L. Morton, K. Moelmer, P. Bertet
      First page: 041011
      Abstract: Author(s): A. Bienfait, P. Campagne-Ibarcq, A. H. Kiilerich, X. Zhou, S. Probst, J. J. Pla, T. Schenkel, D. Vion, D. Esteve, J. J. L. Morton, K. Moelmer, and P. Bertet
      Electron-spin-resonance measurements can achieve greater sensitivity using squeezed light as an input.
      [Phys. Rev. X 7, 041011] Published Tue Oct 17, 2017
      Citation: Phys. Rev. X 7, 041011 (2017)
      PubDate: 2017-10-17T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041011
      Issue No: Vol. 7, No. 4 (2017)
       
  • Quantum Sensors for the Generating Functional of Interacting Quantum Field
           Theories

    • Authors: A. Bermudez; G. Aarts, M. Müller
      First page: 041012
      Abstract: Author(s): A. Bermudez, G. Aarts, and M. Müller
      Quantum simulation offers a powerful approach to testing quantum field theories (QFTs) via precise manipulation of atomic and molecular experiments that emulate the theories under investigation. A new analysis introduces a protocol for implementing a generating functional, the cornerstone of any QFT, in the lab.
      [Phys. Rev. X 7, 041012] Published Thu Oct 19, 2017
      Citation: Phys. Rev. X 7, 041012 (2017)
      PubDate: 2017-10-19T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041012
      Issue No: Vol. 7, No. 4 (2017)
       
  • Ultrafast Gap Dynamics and Electronic Interactions in a Photoexcited
           Cuprate Superconductor

    • Authors: S. Parham; H. Li, T. J. Nummy, J. A. Waugh, X. Q. Zhou, J. Griffith, J. Schneeloch, R. D. Zhong, G. D. Gu, D. S. Dessau
      First page: 041013
      Abstract: Author(s): S. Parham, H. Li, T. J. Nummy, J. A. Waugh, X. Q. Zhou, J. Griffith, J. Schneeloch, R. D. Zhong, G. D. Gu, and D. S. Dessau
      New investigations of a type of high-temperature superconductor using time- and angle-resolved photoemission spectroscopy reveal new details about the nature of photoexcitation and its relation to superconductivity.
      [Phys. Rev. X 7, 041013] Published Fri Oct 20, 2017
      Citation: Phys. Rev. X 7, 041013 (2017)
      PubDate: 2017-10-20T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041013
      Issue No: Vol. 7, No. 4 (2017)
       
  • Global Formation of Topological Defects in the Multiferroic Hexagonal
           Manganites

    • Authors: Q. N. Meier; M. Lilienblum, S. M. Griffin, K. Conder, E. Pomjakushina, Z. Yan, E. Bourret, D. Meier, F. Lichtenberg, E. K. H. Salje, N. A. Spaldin, M. Fiebig, A. Cano
      First page: 041014
      Abstract: Author(s): Q. N. Meier, M. Lilienblum, S. M. Griffin, K. Conder, E. Pomjakushina, Z. Yan, E. Bourret, D. Meier, F. Lichtenberg, E. K. H. Salje, N. A. Spaldin, M. Fiebig, and A. Cano
      The Kibble-Zurek mechanism describes the formation of topological defects in the wake of continuous phase transitions. A new analysis presents a global upgrade to this picture that reveals new phenomena as fluctuations in the system transform from strongly interacting to noninteracting.
      [Phys. Rev. X 7, 041014] Published Fri Oct 20, 2017
      Citation: Phys. Rev. X 7, 041014 (2017)
      PubDate: 2017-10-20T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041014
      Issue No: Vol. 7, No. 4 (2017)
       
  • Driven Quantum Dynamics: Will It Blend'

    • Authors: Leonardo Banchi; Daniel Burgarth, Michael J. Kastoryano
      First page: 041015
      Abstract: Author(s): Leonardo Banchi, Daniel Burgarth, and Michael J. Kastoryano
      Random number generation plays a pivotal role in quantum information applications (such as encryption), but generating random quantum operations requires exceptionally complex resources. A new theoretical analysis shows that an interacting many-body system can blend classical randomness through its dynamics to create quantum randomness.
      [Phys. Rev. X 7, 041015] Published Fri Oct 20, 2017
      Citation: Phys. Rev. X 7, 041015 (2017)
      PubDate: 2017-10-20T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041015
      Issue No: Vol. 7, No. 4 (2017)
       
  • Symmetry and Duality in Bosonization of Two-Dimensional Dirac Fermions

    • Authors: David F. Mross; Jason Alicea, Olexei I. Motrunich
      First page: 041016
      Abstract: Author(s): David F. Mross, Jason Alicea, and Olexei I. Motrunich
      Dualities help theorists describe complex systems using the language of systems that are easier to understand, but keeping track of symmetries and constructing concrete models is often nontrivial. A new analysis presents exact mappings for dual theories used to describe Dirac fermions in two dimensions.
      [Phys. Rev. X 7, 041016] Published Mon Oct 23, 2017
      Citation: Phys. Rev. X 7, 041016 (2017)
      PubDate: 2017-10-23T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041016
      Issue No: Vol. 7, No. 4 (2017)
       
  • New Tunneling Features in Polar III-Nitride Resonant Tunneling Diodes

    • Authors: Jimy Encomendero; Faiza Afroz Faria, S. M. Islam, Vladimir Protasenko, Sergei Rouvimov, Berardi Sensale-Rodriguez, Patrick Fay, Debdeep Jena, Huili Grace Xing
      First page: 041017
      Abstract: Author(s): Jimy Encomendero, Faiza Afroz Faria, S. M. Islam, Vladimir Protasenko, Sergei Rouvimov, Berardi Sensale-Rodriguez, Patrick Fay, Debdeep Jena, and Huili Grace Xing
      Resonant tunneling diodes, being the fastest electronic devices to date, operate by relying on one of the most surprising quantum-mechanical effects: tunneling. Taking advantage of this ultrafast process, however, has proven to be difficult within the nitride family of semiconductors. New techniques for growing GaN crystals have now led to unprecedented observations of resonant tunneling physics in nitride quantum devices.
      [Phys. Rev. X 7, 041017] Published Mon Oct 23, 2017
      Citation: Phys. Rev. X 7, 041017 (2017)
      PubDate: 2017-10-23T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041017
      Issue No: Vol. 7, No. 4 (2017)
       
  • Correlation Effects and Hidden Spin-Orbit Entangled Electronic Order in
           Parent and Electron-Doped Iridates ${\mathrm{Sr}}_{2}{\mathrm{IrO}}_{4}$

    • Authors: Sen Zhou; Kun Jiang, Hua Chen, Ziqiang Wang
      First page: 041018
      Abstract: Author(s): Sen Zhou, Kun Jiang, Hua Chen, and Ziqiang Wang
      High-temperature superconductors such as cuprates exhibit strange behaviors when they are in a metallic state, for example at temperatures above their critical temperature. A new theoretical analysis of the perovskite iridate Sr2IrO4, which shares some properties with cuprates, offers insight into the reason for these behaviors.
      [Phys. Rev. X 7, 041018] Published Tue Oct 24, 2017
      Citation: Phys. Rev. X 7, 041018 (2017)
      PubDate: 2017-10-24T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041018
      Issue No: Vol. 7, No. 4 (2017)
       
  • Acoustic Traps and Lattices for Electrons in Semiconductors

    • Authors: M. J. A. Schuetz; J. Knörzer, G. Giedke, L. M. K. Vandersypen, M. D. Lukin, J. I. Cirac
      First page: 041019
      Abstract: Author(s): M. J. A. Schuetz, J. Knörzer, G. Giedke, L. M. K. Vandersypen, M. D. Lukin, and J. I. Cirac
      Electrons and quasiparticles in solids could be trapped and moved using surface acoustic waves.
      [Phys. Rev. X 7, 041019] Published Tue Oct 24, 2017
      Citation: Phys. Rev. X 7, 041019 (2017)
      PubDate: 2017-10-24T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041019
      Issue No: Vol. 7, No. 4 (2017)
       
  • Electronic Structure of the Metastable Epitaxial Rock-Salt SnSe ${111}$
           Topological Crystalline Insulator

    • Authors: Wencan Jin; Suresh Vishwanath, Jianpeng Liu, Lingyuan Kong, Rui Lou, Zhongwei Dai, Jerzy T. Sadowski, Xinyu Liu, Huai-Hsun Lien, Alexander Chaney, Yimo Han, Michael Cao, Junzhang Ma, Tian Qian, Shancai Wang, Malgorzata Dobrowolska, Jacek Furdyna, David A. Muller, Karsten Pohl, Hong Ding, Jerry I. Dadap, Huili Grace Xing, Richard M. Osgood, Jr.
      First page: 041020
      Abstract: Author(s): Wencan Jin, Suresh Vishwanath, Jianpeng Liu, Lingyuan Kong, Rui Lou, Zhongwei Dai, Jerzy T. Sadowski, Xinyu Liu, Huai-Hsun Lien, Alexander Chaney, Yimo Han, Michael Cao, Junzhang Ma, Tian Qian, Shancai Wang, Malgorzata Dobrowolska, Jacek Furdyna, David A. Muller, Karsten Pohl, Hong Ding, Jerry I. Dadap, Huili Grace Xing, and Richard M. Osgood, Jr.
      Topological crystalline insulators are one of a new class of materials whose surface electronic behavior differs from its interior behavior, although it’s not clear how the internal structure affects the surface and vice versa. New experiments take a close look at these connections in metastable tin selenide, a semiconductor that can exhibit topological behaviors.
      [Phys. Rev. X 7, 041020] Published Wed Oct 25, 2017
      Citation: Phys. Rev. X 7, 041020 (2017)
      PubDate: 2017-10-25T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041020
      Issue No: Vol. 7, No. 4 (2017)
       
  • Many-Body Localization with Long-Range Interactions

    • Authors: Rahul M. Nandkishore; S. L. Sondhi
      First page: 041021
      Abstract: Author(s): Rahul M. Nandkishore and S. L. Sondhi
      Many-body localization is widely assumed to not be compatible with physical systems that exhibit long-range interactions. A new theoretical analysis shows that it is compatible with such systems, thus opening many-body localization physics to a wide range of novel situations.
      [Phys. Rev. X 7, 041021] Published Wed Oct 25, 2017
      Citation: Phys. Rev. X 7, 041021 (2017)
      PubDate: 2017-10-25T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041021
      Issue No: Vol. 7, No. 4 (2017)
       
  • Background-Free 3D Nanometric Localization and Sub-nm Asymmetry Detection
           of Single Plasmonic Nanoparticles by Four-Wave Mixing Interferometry with
           Optical Vortices

    • Authors: George Zoriniants; Francesco Masia, Naya Giannakopoulou, Wolfgang Langbein, Paola Borri
      First page: 041022
      Abstract: Author(s): George Zoriniants, Francesco Masia, Naya Giannakopoulou, Wolfgang Langbein, and Paola Borri
      Despite many advances, rapid, precise 3D tracking of nanoscale particles in a complex environment remains challenging. A new technique based on four-wave mixing interferometry not only precisely tracks a gold nanoparticle but also is sensitive to particle asymmetry and orientation.
      [Phys. Rev. X 7, 041022] Published Fri Oct 27, 2017
      Citation: Phys. Rev. X 7, 041022 (2017)
      PubDate: 2017-10-27T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041022
      Issue No: Vol. 7, No. 4 (2017)
       
  • Deterministic Generation of All-Photonic Quantum Repeaters from
           Solid-State Emitters

    • Authors: Donovan Buterakos; Edwin Barnes, Sophia E. Economou
      First page: 041023
      Abstract: Author(s): Donovan Buterakos, Edwin Barnes, and Sophia E. Economou
      Quantum repeaters allow for reliable transmission of quantum information over long distances. One possible approach relies on highly entangled photons. A new protocol provides a way to generate arbitrarily large states of entangled photons using just one emitter coupled to a single qubit.
      [Phys. Rev. X 7, 041023] Published Fri Oct 27, 2017
      Citation: Phys. Rev. X 7, 041023 (2017)
      PubDate: 2017-10-27T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041023
      Issue No: Vol. 7, No. 4 (2017)
       
  • Relating Topological Determinants of Complex Networks to Their Spectral
           Properties: Structural and Dynamical Effects

    • Authors: Claudio Castellano; Romualdo Pastor-Satorras
      First page: 041024
      Abstract: Author(s): Claudio Castellano and Romualdo Pastor-Satorras
      A key parameter for characterizing disease outbreaks and other types of dynamics on complex networks is the largest eigenvalue of the adjacency matrix. A new analysis presents a very general way of estimating it and a physical interpretation of its value.
      [Phys. Rev. X 7, 041024] Published Fri Oct 27, 2017
      Citation: Phys. Rev. X 7, 041024 (2017)
      PubDate: 2017-10-27T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041024
      Issue No: Vol. 7, No. 4 (2017)
       
  • Constraining Nonperturbative Strong-Field Effects in Scalar-Tensor Gravity
           by Combining Pulsar Timing and Laser-Interferometer Gravitational-Wave
           Detectors

    • Authors: Lijing Shao; Noah Sennett, Alessandra Buonanno, Michael Kramer, Norbert Wex
      First page: 041025
      Abstract: Author(s): Lijing Shao, Noah Sennett, Alessandra Buonanno, Michael Kramer, and Norbert Wex
      Pulsar timing and laser-interferometer gravitational-wave observations are two powerful astronomical tools for testing our understanding of gravity. A new analysis demonstrates the complementarity of these techniques. As new observatories come online in the coming years, combining these measurements could improve constraints on an illustrative class of theories that modify Einstein’s general theory of relativity.
      [Phys. Rev. X 7, 041025] Published Fri Oct 27, 2017
      Citation: Phys. Rev. X 7, 041025 (2017)
      PubDate: 2017-10-27T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041025
      Issue No: Vol. 7, No. 4 (2017)
       
  • Designer Curved-Space Geometry for Relativistic Fermions in Weyl
           Metamaterials

    • Authors: Alex Westström; Teemu Ojanen
      First page: 041026
      Abstract: Author(s): Alex Westström and Teemu Ojanen
      In a Weyl semimetal, the behavior of charge carriers mirrors the physics of Einstein’s special relativity. A new analysis shows how to engineer materials where the particles mimic the principles of general relativity, opening the door to novel electronic devices.
      [Phys. Rev. X 7, 041026] Published Mon Oct 30, 2017
      Citation: Phys. Rev. X 7, 041026 (2017)
      PubDate: 2017-10-30T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041026
      Issue No: Vol. 7, No. 4 (2017)
       
  • Second-Order Free-Riding on Antisocial Punishment Restores the
           Effectiveness of Prosocial Punishment

    • Authors: Attila Szolnoki; Matjaž Perc
      First page: 041027
      Abstract: Author(s): Attila Szolnoki and Matjaž Perc
      The effectiveness of punishment can be challenged by an unwillingness to shoulder the costs of punishment and by noncooperators who punish cooperators. Simulations based on techniques from statistical physics show how these can cancel one another in an unlikely and counterintuitive evolutionary outcome.
      [Phys. Rev. X 7, 041027] Published Mon Oct 30, 2017
      Citation: Phys. Rev. X 7, 041027 (2017)
      PubDate: 2017-10-30T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041027
      Issue No: Vol. 7, No. 4 (2017)
       
  • Disorder and Quantum Spin Ice

    • Authors: N. Martin; P. Bonville, E. Lhotel, S. Guitteny, A. Wildes, C. Decorse, M. Ciomaga Hatnean, G. Balakrishnan, I. Mirebeau, S. Petit
      First page: 041028
      Abstract: Author(s): N. Martin, P. Bonville, E. Lhotel, S. Guitteny, A. Wildes, C. Decorse, M. Ciomaga Hatnean, G. Balakrishnan, I. Mirebeau, and S. Petit
      Randomness in the arrangement of molecules within certain types of frustrated magnets may offer a way to promote and stabilize exotic states of matter known as spin liquids. New neutron-scattering experiments characterize the disorder in the spin ice candidate Pr2Zr2O7 and provide an explanation for some of this material’s unique properties.
      [Phys. Rev. X 7, 041028] Published Tue Oct 31, 2017
      Citation: Phys. Rev. X 7, 041028 (2017)
      PubDate: 2017-10-31T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041028
      Issue No: Vol. 7, No. 4 (2017)
       
  • Change in Stripes for Cholesteric Shells via Anchoring in Moderation

    • Authors: Lisa Tran; Maxim O. Lavrentovich, Guillaume Durey, Alexandre Darmon, Martin F. Haase, Ningwei Li, Daeyeon Lee, Kathleen J. Stebe, Randall D. Kamien, Teresa Lopez-Leon
      First page: 041029
      Abstract: Author(s): Lisa Tran, Maxim O. Lavrentovich, Guillaume Durey, Alexandre Darmon, Martin F. Haase, Ningwei Li, Daeyeon Lee, Kathleen J. Stebe, Randall D. Kamien, and Teresa Lopez-Leon
      Changing the geometrical organization of molecules in a liquid crystal can change how objects move within it and how it interacts with light, opening a door to novel applications. New experiments show how to produce a wealth of patterns in cholesteric liquid crystals, revealing also how these materials transition from one pattern to another.
      [Phys. Rev. X 7, 041029] Published Wed Nov 01, 2017
      Citation: Phys. Rev. X 7, 041029 (2017)
      PubDate: 2017-11-01T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041029
      Issue No: Vol. 7, No. 4 (2017)
       
  • Attosecond Streaking in the Water Window: A New Regime of Attosecond Pulse
           Characterization

    • Authors: Seth L. Cousin; Nicola Di Palo, Bárbara Buades, Stephan M. Teichmann, M. Reduzzi, M. Devetta, A. Kheifets, G. Sansone, Jens Biegert
      First page: 041030
      Abstract: Author(s): Seth L. Cousin, Nicola Di Palo, Bárbara Buades, Stephan M. Teichmann, M. Reduzzi, M. Devetta, A. Kheifets, G. Sansone, and Jens Biegert
      Pulses of x-ray light that last mere attoseconds are essential to capturing fundamental processes in nature, such as the motion of electrons and their role in chemical bonding. New experiments generate and, for the first time, characterize attosecond pulses in the soft-x-ray portion of the spectrum.
      [Phys. Rev. X 7, 041030] Published Thu Nov 02, 2017
      Citation: Phys. Rev. X 7, 041030 (2017)
      PubDate: 2017-11-02T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041030
      Issue No: Vol. 7, No. 4 (2017)
       
  • Strain-Dependent Solid Surface Stress and the Stiffness of Soft Contacts

    • Authors: Katharine E. Jensen; Robert W. Style, Qin Xu, Eric R. Dufresne
      First page: 041031
      Abstract: Author(s): Katharine E. Jensen, Robert W. Style, Qin Xu, and Eric R. Dufresne
      Despite the ubiquity of soft adhesives in everyday materials, much of their underlying physics remains unknown. New experiments in which small glass spheres are pulled from a silicone gel reveal crucial differences in how soft and stiff materials adhere.
      [Phys. Rev. X 7, 041031] Published Thu Nov 09, 2017
      Citation: Phys. Rev. X 7, 041031 (2017)
      PubDate: 2017-11-09T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041031
      Issue No: Vol. 7, No. 4 (2017)
       
  • Bimetric Theory of Fractional Quantum Hall States

    • Authors: Andrey Gromov; Dam Thanh Son
      First page: 041032
      Abstract: Author(s): Andrey Gromov and Dam Thanh Son
      While the edge states of a 2D electron gas in the fractional quantum Hall regime have many fascinating properties, the bulk dynamics are widely assumed to be uninteresting. A new theory reveals not only rich behavior in the bulk but also a unified framework for deriving known properties of this state.
      [Phys. Rev. X 7, 041032] Published Fri Nov 10, 2017
      Citation: Phys. Rev. X 7, 041032 (2017)
      PubDate: 2017-11-10T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041032
      Issue No: Vol. 7, No. 4 (2017)
       
  • Third Law of Thermodynamics as a Single Inequality

    • Authors: Henrik Wilming; Rodrigo Gallego
      First page: 041033
      Abstract: Author(s): Henrik Wilming and Rodrigo Gallego
      The third law of thermodynamics dictates that it is impossible to cool anything to absolute zero in a finite amount of time and with finite resources, but the law lacks a quantitative formulation to express the limits of what is allowed. A new analysis introduces such a formulation, which quantifies how close to zero a system can get given some initial amount of energy.
      [Phys. Rev. X 7, 041033] Published Mon Nov 13, 2017
      Citation: Phys. Rev. X 7, 041033 (2017)
      PubDate: 2017-11-13T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041033
      Issue No: Vol. 7, No. 4 (2017)
       
  • Search for Axionlike Dark Matter through Nuclear Spin Precession in
           Electric and Magnetic Fields

    • Authors: C. Abel et al.
      First page: 041034
      Abstract: Author(s): C. Abel et al.
      An analysis of spin-precession data of atoms and neutrons sets some of the tightest limits to date on the strength of interactions between axions and gluons or nucleons.
      [Phys. Rev. X 7, 041034] Published Tue Nov 14, 2017
      Citation: Phys. Rev. X 7, 041034 (2017)
      PubDate: 2017-11-14T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041034
      Issue No: Vol. 7, No. 4 (2017)
       
  • Three-Body Coulomb Problem

    • Authors: R. Combescot
      First page: 041035
      Abstract: Author(s): R. Combescot
      Describing three bodies moving under known mutual forces is difficult, especially in quantum mechanics. On the other hand, the two-body problem is very simple. A new method uses the two-body solution to solve this three-body problem.
      [Phys. Rev. X 7, 041035] Published Wed Nov 15, 2017
      Citation: Phys. Rev. X 7, 041035 (2017)
      PubDate: 2017-11-15T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041035
      Issue No: Vol. 7, No. 4 (2017)
       
  • Simultaneous, Full Characterization of a Single-Photon State

    • Authors: Tim Thomay; Sergey V. Polyakov, Olivier Gazzano, Elizabeth Goldschmidt, Zachary D. Eldredge, Tobias Huber, Vivien Loo, Glenn S. Solomon
      First page: 041036
      Abstract: Author(s): Tim Thomay, Sergey V. Polyakov, Olivier Gazzano, Elizabeth Goldschmidt, Zachary D. Eldredge, Tobias Huber, Vivien Loo, and Glenn S. Solomon
      Advances in quantum optics and quantum information technologies increasingly require a way to fully understand the state of single indistinguishable photons. While previous approaches have needed two or more measurements, a new experiment demonstrates a way to characterize single-photon states with just one measurement.
      [Phys. Rev. X 7, 041036] Published Wed Nov 15, 2017
      Citation: Phys. Rev. X 7, 041036 (2017)
      PubDate: 2017-11-15T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041036
      Issue No: Vol. 7, No. 4 (2017)
       
  • Correlation Imaging Reveals Specific Crowding Dynamics of Kinesin Motor
           Proteins

    • Authors: Daniël M. Miedema; Vandana S. Kushwaha, Dmitry V. Denisov, Seyda Acar, Bernard Nienhuis, Erwin J. G. Peterman, Peter Schall
      First page: 041037
      Abstract: Author(s): Daniël M. Miedema, Vandana S. Kushwaha, Dmitry V. Denisov, Seyda Acar, Bernard Nienhuis, Erwin J. G. Peterman, and Peter Schall
      Living cells depend on molecular motor proteins to transport cargo, but crowding effects are thought to impact transport efficiency. A new imaging technique reveals motor behavior under crowding conditions, elucidating the physical nature of how these molecules respond to cellular traffic.
      [Phys. Rev. X 7, 041037] Published Thu Nov 16, 2017
      Citation: Phys. Rev. X 7, 041037 (2017)
      PubDate: 2017-11-16T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041037
      Issue No: Vol. 7, No. 4 (2017)
       
  • Accumulation of Colloidal Particles in Flow Junctions Induced by Fluid
           Flow and Diffusiophoresis

    • Authors: Sangwoo Shin; Jesse T. Ault, Patrick B. Warren, Howard A. Stone
      First page: 041038
      Abstract: Author(s): Sangwoo Shin, Jesse T. Ault, Patrick B. Warren, and Howard A. Stone
      In flow channels, the fluid is expected to transport suspended particles unless the particles are too large or adhesive. New experiments show unexpected behavior—an accumulation of particles at flow junctions—when solutes are dissolved in the fluid.
      [Phys. Rev. X 7, 041038] Published Thu Nov 16, 2017
      Citation: Phys. Rev. X 7, 041038 (2017)
      PubDate: 2017-11-16T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041038
      Issue No: Vol. 7, No. 4 (2017)
       
  • Inertioelastic Flow Instability at a Stagnation Point

    • Authors: Noa Burshtein; Konstantinos Zografos, Amy Q. Shen, Robert J. Poole, Simon J. Haward
      First page: 041039
      Abstract: Author(s): Noa Burshtein, Konstantinos Zografos, Amy Q. Shen, Robert J. Poole, and Simon J. Haward
      Polymer additives in simple fluids help reduce flow resistance and are an enormous benefit in many industrial and biomedical applications, but they are challenging to study. New visualization techniques reveal how incremental polymer additions to water-based solvents affect the development of a single vortex in the fluid.
      [Phys. Rev. X 7, 041039] Published Fri Nov 17, 2017
      Citation: Phys. Rev. X 7, 041039 (2017)
      PubDate: 2017-11-17T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041039
      Issue No: Vol. 7, No. 4 (2017)
       
  • Marrying Excitons and Plasmons in Monolayer Transition-Metal
           Dichalcogenides

    • Authors: Dinh Van Tuan; Benedikt Scharf, Igor Žutić, Hanan Dery
      First page: 041040
      Abstract: Author(s): Dinh Van Tuan, Benedikt Scharf, Igor Žutić, and Hanan Dery
      Intervalley plasmons are a novel type of collective excitation observed in monolayer transition-metal dichalcogenides (TMDs). A new analysis reveals why a particular optical signature of these excitations shows up in certain electron-doped TMDs.
      [Phys. Rev. X 7, 041040] Published Fri Nov 17, 2017
      Citation: Phys. Rev. X 7, 041040 (2017)
      PubDate: 2017-11-17T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041040
      Issue No: Vol. 7, No. 4 (2017)
       
  • Trigger of the Ubiquitous Surface Band Bending in 3D Topological
           Insulators

    • Authors: E. Frantzeskakis; S. V. Ramankutty, N. de Jong, Y. K. Huang, Y. Pan, A. Tytarenko, M. Radovic, N. C. Plumb, M. Shi, A. Varykhalov, A. de Visser, E. van Heumen, M. S. Golden
      First page: 041041
      Abstract: Author(s): E. Frantzeskakis, S. V. Ramankutty, N. de Jong, Y. K. Huang, Y. Pan, A. Tytarenko, M. Radovic, N. C. Plumb, M. Shi, A. Varykhalov, A. de Visser, E. van Heumen, and M. S. Golden
      Electron spectroscopy and electron transport experiments are key techniques to probing the electronic structure of topological insulators, but results from these two methods disagree. A new analysis shows that the problem is inherent to ultraviolet light used in electron spectroscopy, and offers a solution.
      [Phys. Rev. X 7, 041041] Published Mon Nov 20, 2017
      Citation: Phys. Rev. X 7, 041041 (2017)
      PubDate: 2017-11-20T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041041
      Issue No: Vol. 7, No. 4 (2017)
       
  • Dynamical Birefringence: Electron-Hole Recollisions as Probes of Berry
           Curvature

    • Authors: Hunter B. Banks; Qile Wu, Darren C. Valovcin, Shawn Mack, Arthur C. Gossard, Loren Pfeiffer, Ren-Bao Liu, Mark S. Sherwin
      First page: 041042
      Abstract: Author(s): Hunter B. Banks, Qile Wu, Darren C. Valovcin, Shawn Mack, Arthur C. Gossard, Loren Pfeiffer, Ren-Bao Liu, and Mark S. Sherwin
      Berry phase—a parameter that provides deep geometric insight into quantum mechanical systems—is difficult to measure in condensed-matter systems. New experiments and theoretical analyses demonstrate a path to such measurements by observing sidebands of infrared light transmitted through driven, thin layers of a semiconductor.
      [Phys. Rev. X 7, 041042] Published Tue Nov 21, 2017
      Citation: Phys. Rev. X 7, 041042 (2017)
      PubDate: 2017-11-21T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041042
      Issue No: Vol. 7, No. 4 (2017)
       
  • Widely Tunable On-Chip Microwave Circulator for Superconducting Quantum
           Circuits

    • Authors: Benjamin J. Chapman; Eric I. Rosenthal, Joseph Kerckhoff, Bradley A. Moores, Leila R. Vale, J. A. B. Mates, Gene C. Hilton, Kevin Lalumière, Alexandre Blais, K. W. Lehnert
      First page: 041043
      Abstract: Author(s): Benjamin J. Chapman, Eric I. Rosenthal, Joseph Kerckhoff, Bradley A. Moores, Leila R. Vale, J. A. B. Mates, Gene C. Hilton, Kevin Lalumière, Alexandre Blais, and K. W. Lehnert
      A device that routes microwave signals could help researchers scale up quantum-computing architectures.
      [Phys. Rev. X 7, 041043] Published Wed Nov 22, 2017
      Citation: Phys. Rev. X 7, 041043 (2017)
      PubDate: 2017-11-22T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041043
      Issue No: Vol. 7, No. 4 (2017)
       
  • Sensitive Dependence of Optimal Network Dynamics on Network Structure

    • Authors: Takashi Nishikawa; Jie Sun, Adilson E. Motter
      First page: 041044
      Abstract: Author(s): Takashi Nishikawa, Jie Sun, and Adilson E. Motter
      The relationship between the structure and dynamics of a network is key to understanding the behavior of complex systems. A new analysis shows how network optimization, whether designed or evolved, can lead to collective dynamics that depend sensitively on the structure of the network.
      [Phys. Rev. X 7, 041044] Published Tue Nov 28, 2017
      Citation: Phys. Rev. X 7, 041044 (2017)
      PubDate: 2017-11-28T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041044
      Issue No: Vol. 7, No. 4 (2017)
       
  • Quantum Dynamics of Skyrmions in Chiral Magnets

    • Authors: Christina Psaroudaki; Silas Hoffman, Jelena Klinovaja, Daniel Loss
      First page: 041045
      Abstract: Author(s): Christina Psaroudaki, Silas Hoffman, Jelena Klinovaja, and Daniel Loss
      Magnetic Skyrmions are topologically protected spin structures that have emerged as attractive candidates for magnetic storage applications. A new analysis goes beyond the traditional classical equations that describe Skyrmion dynamics, providing a full quantum description of the propagation of Skyrmions in insulating magnetic films at zero and finite temperatures.
      [Phys. Rev. X 7, 041045] Published Tue Nov 28, 2017
      Citation: Phys. Rev. X 7, 041045 (2017)
      PubDate: 2017-11-28T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041045
      Issue No: Vol. 7, No. 4 (2017)
       
  • Efficient Basis Formulation for ($1+1$)-Dimensional SU(2) Lattice Gauge
           Theory: Spectral Calculations with Matrix Product States

    • Authors: Mari Carmen Bañuls; Krzysztof Cichy, J. Ignacio Cirac, Karl Jansen, Stefan Kühn
      First page: 041046
      Abstract: Author(s): Mari Carmen Bañuls, Krzysztof Cichy, J. Ignacio Cirac, Karl Jansen, and Stefan Kühn
      In gauge theories with one spatial and time dimension, the gauge degrees of freedom are not independent and can be integrated out, making them simpler to work with. A new analysis extends this to an explicit formulation of the physical subspace for a (1+1)-dimensional SU(2) lattice gauge theory.
      [Phys. Rev. X 7, 041046] Published Tue Nov 28, 2017
      Citation: Phys. Rev. X 7, 041046 (2017)
      PubDate: 2017-11-28T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041046
      Issue No: Vol. 7, No. 4 (2017)
       
  • Probing Slow Relaxation and Many-Body Localization in Two-Dimensional
           Quasiperiodic Systems

    • Authors: Pranjal Bordia; Henrik Lüschen, Sebastian Scherg, Sarang Gopalakrishnan, Michael Knap, Ulrich Schneider, Immanuel Bloch
      First page: 041047
      Abstract: Author(s): Pranjal Bordia, Henrik Lüschen, Sebastian Scherg, Sarang Gopalakrishnan, Michael Knap, Ulrich Schneider, and Immanuel Bloch
      While many-body localization is well understood in one-dimensional systems, its behavior in two or more dimensions is largely unknown. New experiments hint at a many-body localized phase in a two-dimensional system and provide insight into how a system transitions between this phase and a normal thermal phase.
      [Phys. Rev. X 7, 041047] Published Tue Nov 28, 2017
      Citation: Phys. Rev. X 7, 041047 (2017)
      PubDate: 2017-11-28T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041047
      Issue No: Vol. 7, No. 4 (2017)
       
  • Gapless Symmetry-Protected Topological Order

    • Authors: Thomas Scaffidi; Daniel E. Parker, Romain Vasseur
      First page: 041048
      Abstract: Author(s): Thomas Scaffidi, Daniel E. Parker, and Romain Vasseur
      New theoretical constructions describe a largely unexplored phase of matter, a type of strongly interacting gapless topological quantum system. Such a framework could lead to a more thorough study of various exotic quantum materials.
      [Phys. Rev. X 7, 041048] Published Wed Nov 29, 2017
      Citation: Phys. Rev. X 7, 041048 (2017)
      PubDate: 2017-11-29T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041048
      Issue No: Vol. 7, No. 4 (2017)
       
  • Pseudo-Goldstone Magnons in the Frustrated $S=3/2$ Heisenberg Helimagnet
           ${\mathrm{ZnCr}}_{2}{\mathrm{Se}}_{4}$ with a Pyrochlore Magnetic
           Sublattice

    • Authors: Y. V. Tymoshenko; Y. A. Onykiienko, T. Müller, R. Thomale, S. Rachel, A. S. Cameron, P. Y. Portnichenko, D. V. Efremov, V. Tsurkan, D. L. Abernathy, J. Ollivier, A. Schneidewind, A. Piovano, V. Felea, A. Loidl, D. S. Inosov
      First page: 041049
      Abstract: Author(s): Y. V. Tymoshenko, Y. A. Onykiienko, T. Müller, R. Thomale, S. Rachel, A. S. Cameron, P. Y. Portnichenko, D. V. Efremov, V. Tsurkan, D. L. Abernathy, J. Ollivier, A. Schneidewind, A. Piovano, V. Felea, A. Loidl, and D. S. Inosov
      Wave excitations (magnons) along the helical arrangement of magnetic moments in helimagnets generally travel along this helix, while orthogonal magnons are thought to require much higher energy. New experiments reveal the existence of low-energy orthogonal magnons that could lead to a new understanding of a broad class of magnetic materials.
      [Phys. Rev. X 7, 041049] Published Wed Nov 29, 2017
      Citation: Phys. Rev. X 7, 041049 (2017)
      PubDate: 2017-11-29T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041049
      Issue No: Vol. 7, No. 4 (2017)
       
  • Unbiased All-Optical Random-Number Generator

    • Authors: Tobias Steinle; Johannes N. Greiner, Jörg Wrachtrup, Harald Giessen, Ilja Gerhardt
      First page: 041050
      Abstract: Author(s): Tobias Steinle, Johannes N. Greiner, Jörg Wrachtrup, Harald Giessen, and Ilja Gerhardt
      Random numbers are at the heart of secure communication protocols; unfortunately current hardware-based approaches for their generation suffer from a number of problems. A new experiment demonstrates a laser-based approach to random-number generation that circumvents technical influences that might spoil the randomness in the generated numbers.
      [Phys. Rev. X 7, 041050] Published Thu Nov 30, 2017
      Citation: Phys. Rev. X 7, 041050 (2017)
      PubDate: 2017-11-30T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041050
      Issue No: Vol. 7, No. 4 (2017)
       
  • Three-Dimensional Spatiotemporal Pulse-Train Solitons

    • Authors: Oren Lahav; Ofer Kfir, Pavel Sidorenko, Maor Mutzafi, Avner Fleischer, Oren Cohen
      First page: 041051
      Abstract: Author(s): Oren Lahav, Ofer Kfir, Pavel Sidorenko, Maor Mutzafi, Avner Fleischer, and Oren Cohen
      Self-trapped wave packets known as solitons have been observed in one and two spatiotemporal dimensions, but three-dimensional solitons have remained elusive. A new experiment demonstrates the first observation of a train of three-dimensional optical solitons, also known as light bullets.
      [Phys. Rev. X 7, 041051] Published Thu Nov 30, 2017
      Citation: Phys. Rev. X 7, 041051 (2017)
      PubDate: 2017-11-30T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041051
      Issue No: Vol. 7, No. 4 (2017)
       
  • Quantum-Assisted Learning of Hardware-Embedded Probabilistic Graphical
           Models

    • Authors: Marcello Benedetti; John Realpe-Gómez, Rupak Biswas, Alejandro Perdomo-Ortiz
      First page: 041052
      Abstract: Author(s): Marcello Benedetti, John Realpe-Gómez, Rupak Biswas, and Alejandro Perdomo-Ortiz
      Quantum computing could greatly speed up machine learning techniques that rely on sampling complex probability distributions, but limitations prevent demonstrations of feasibility. A new technique implemented on a quantum annealer surpasses these limitations and shows how quantum computing can assist in machine learning tasks.
      [Phys. Rev. X 7, 041052] Published Thu Nov 30, 2017
      Citation: Phys. Rev. X 7, 041052 (2017)
      PubDate: 2017-11-30T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041052
      Issue No: Vol. 7, No. 4 (2017)
       
  • Super- and Anti-Principal-Modes in Multimode Waveguides

    • Authors: Philipp Ambichl; Wen Xiong, Yaron Bromberg, Brandon Redding, Hui Cao, Stefan Rotter
      First page: 041053
      Abstract: Author(s): Philipp Ambichl, Wen Xiong, Yaron Bromberg, Brandon Redding, Hui Cao, and Stefan Rotter
      Multimode optical fibers offer more transmission capacity by supporting multiple transverse modes, but crosstalk between these channels remains a vexing problem. New experiments and theoretical analysis reveal unique light states in multimode fibers that are strongly protected against this crosstalk.
      [Phys. Rev. X 7, 041053] Published Thu Nov 30, 2017
      Citation: Phys. Rev. X 7, 041053 (2017)
      PubDate: 2017-11-30T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041053
      Issue No: Vol. 7, No. 4 (2017)
       
  • Mottness Collapse in
           $1\mathrm{T}\text{−}{\mathrm{TaS}}_{2−x}{\mathrm{Se}}_{x}$
           Transition-Metal Dichalcogenide: An Interplay between Localized and
           Itinerant Orbitals

    • Authors: Shuang Qiao; Xintong Li, Naizhou Wang, Wei Ruan, Cun Ye, Peng Cai, Zhenqi Hao, Hong Yao, Xianhui Chen, Jian Wu, Yayu Wang, Zheng Liu
      First page: 041054
      Abstract: Author(s): Shuang Qiao, Xintong Li, Naizhou Wang, Wei Ruan, Cun Ye, Peng Cai, Zhenqi Hao, Hong Yao, Xianhui Chen, Jian Wu, Yayu Wang, and Zheng Liu
      Recent experiments have shown that the transition-metal dichalcogenide 1T-TaS2−xSex can transition from a Mott insulator to a superconductor by varying the S/Se ratio. New measurements with a scanning tunneling microscope along with first-principles calculations reveal the mechanism underlying this transition.
      [Phys. Rev. X 7, 041054] Published Fri Dec 01, 2017
      Citation: Phys. Rev. X 7, 041054 (2017)
      PubDate: 2017-12-01T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041054
      Issue No: Vol. 7, No. 4 (2017)
       
  • Intermode Breather Solitons in Optical Microresonators

    • Authors: Hairun Guo; Erwan Lucas, Martin H. P. Pfeiffer, Maxim Karpov, Miles Anderson, Junqiu Liu, Michael Geiselmann, John D. Jost, Tobias J. Kippenberg
      First page: 041055
      Abstract: Author(s): Hairun Guo, Erwan Lucas, Martin H. P. Pfeiffer, Maxim Karpov, Miles Anderson, Junqiu Liu, Michael Geiselmann, John D. Jost, and Tobias J. Kippenberg
      Optical frequency combs, which constitute equally spaced frequency lines, can be generated using temporal dissipative Kerr solitons—stable laser pulses generated in a laser-driven nonlinear microresonator—but these solitons can destabilize and oscillate. A new analysis reveals a novel mechanism that can trigger “soliton breathing,” highlighting the rich nonlinear dynamics of dissipative temporal structures in microresonators and identifying a regime that has to be avoided in applications.
      [Phys. Rev. X 7, 041055] Published Wed Dec 06, 2017
      Citation: Phys. Rev. X 7, 041055 (2017)
      PubDate: 2017-12-06T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041055
      Issue No: Vol. 7, No. 4 (2017)
       
  • Angle-Multiplexed Metasurfaces: Encoding Independent Wavefronts in a
           Single Metasurface under Different Illumination Angles

    • Authors: Seyedeh Mahsa Kamali; Ehsan Arbabi, Amir Arbabi, Yu Horie, MohammadSadegh Faraji-Dana, Andrei Faraon
      First page: 041056
      Abstract: Author(s): Seyedeh Mahsa Kamali, Ehsan Arbabi, Amir Arbabi, Yu Horie, MohammadSadegh Faraji-Dana, and Andrei Faraon
      Researchers have demonstrated a device that can project two distinct holographic images when illuminated at different angles.
      [Phys. Rev. X 7, 041056] Published Wed Dec 06, 2017
      Citation: Phys. Rev. X 7, 041056 (2017)
      PubDate: 2017-12-06T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041056
      Issue No: Vol. 7, No. 4 (2017)
       
  • Competing Spin Liquids and Hidden Spin-Nematic Order in Spin Ice with
           Frustrated Transverse Exchange

    • Authors: Mathieu Taillefumier; Owen Benton, Han Yan, L. D. C. Jaubert, Nic Shannon
      First page: 041057
      Abstract: Author(s): Mathieu Taillefumier, Owen Benton, Han Yan, L. D. C. Jaubert, and Nic Shannon
      Spin ice is an exotic phase of low-temperature magnetic material in which the atoms behave like a liquid no matter how cold it becomes. New computer simulations look at how spin ice behaves near absolute zero and find surprisingly rich behavior.
      [Phys. Rev. X 7, 041057] Published Wed Dec 06, 2017
      Citation: Phys. Rev. X 7, 041057 (2017)
      PubDate: 2017-12-06T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041057
      Issue No: Vol. 7, No. 4 (2017)
       
  • Polarization-Based Tests of Gravity with the Stochastic Gravitational-Wave
           Background

    • Authors: Thomas Callister; A. Sylvia Biscoveanu, Nelson Christensen, Maximiliano Isi, Andrew Matas, Olivier Minazzoli, Tania Regimbau, Mairi Sakellariadou, Jay Tasson, Eric Thrane
      First page: 041058
      Abstract: Author(s): Thomas Callister, A. Sylvia Biscoveanu, Nelson Christensen, Maximiliano Isi, Andrew Matas, Olivier Minazzoli, Tania Regimbau, Mairi Sakellariadou, Jay Tasson, and Eric Thrane
      Now that gravitational-wave detection is a reality, measurements of gravitational-wave polarization could provide crucial tests of alternatives to the general theory of relativity. A new analysis provides a way to extract polarizations from the stochastic gravitational-wave background and investigates how additional detectors could provide constraints on theories of gravity.
      [Phys. Rev. X 7, 041058] Published Thu Dec 07, 2017
      Citation: Phys. Rev. X 7, 041058 (2017)
      PubDate: 2017-12-07T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041058
      Issue No: Vol. 7, No. 4 (2017)
       
  • Vibrational Surface Electron-Energy-Loss Spectroscopy Probes Confined
           Surface-Phonon Modes

    • Authors: Hugo Lourenço-Martins; Mathieu Kociak
      First page: 041059
      Abstract: Author(s): Hugo Lourenço-Martins and Mathieu Kociak
      The study of surface phonons, collective atomic vibrations localized on the surface of solids, has long been helped by insights from experiments on surface plasmons, their electronic counterparts. A new analysis takes these analogies in the opposite direction, using modern concepts for plasmons to explain current phonon experiments.
      [Phys. Rev. X 7, 041059] Published Thu Dec 07, 2017
      Citation: Phys. Rev. X 7, 041059 (2017)
      PubDate: 2017-12-07T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041059
      Issue No: Vol. 7, No. 4 (2017)
       
  • Experiments on Metamaterials with Negative Effective Static
           Compressibility

    • Authors: Jingyuan Qu; Alexander Gerber, Frederik Mayer, Muamer Kadic, Martin Wegener
      First page: 041060
      Abstract: Author(s): Jingyuan Qu, Alexander Gerber, Frederik Mayer, Muamer Kadic, and Martin Wegener
      Artificial materials that increase their volume when subject to an increase in air pressure—contrary to expectations—could prove useful in artificial muscles and actuators. New experiments demonstrate, for the first time, the successful fabrication and performance of such an unusual material.
      [Phys. Rev. X 7, 041060] Published Fri Dec 08, 2017
      Citation: Phys. Rev. X 7, 041060 (2017)
      PubDate: 2017-12-08T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041060
      Issue No: Vol. 7, No. 4 (2017)
       
  • Assessing the Progress of Trapped-Ion Processors Towards Fault-Tolerant
           Quantum Computation

    • Authors: A. Bermudez; X. Xu, R. Nigmatullin, J. O’Gorman, V. Negnevitsky, P. Schindler, T. Monz, U. G. Poschinger, C. Hempel, J. Home, F. Schmidt-Kaler, M. Biercuk, R. Blatt, S. Benjamin, M. Müller
      First page: 041061
      Abstract: Author(s): A. Bermudez, X. Xu, R. Nigmatullin, J. O’Gorman, V. Negnevitsky, P. Schindler, T. Monz, U. G. Poschinger, C. Hempel, J. Home, F. Schmidt-Kaler, M. Biercuk, R. Blatt, S. Benjamin, and M. Müller
      As small prototype quantum processors progress to large-scale, fault-tolerant computers, it is increasingly necessary to quantitatively assess the performance of quantum error correction. A new benchmark offers just such an assessment of trapped-ion quantum processors.
      [Phys. Rev. X 7, 041061] Published Wed Dec 13, 2017
      Citation: Phys. Rev. X 7, 041061 (2017)
      PubDate: 2017-12-13T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041061
      Issue No: Vol. 7, No. 4 (2017)
       
  • Prethermal Strong Zero Modes and Topological Qubits

    • Authors: Dominic V. Else; Paul Fendley, Jack Kemp, Chetan Nayak
      First page: 041062
      Abstract: Author(s): Dominic V. Else, Paul Fendley, Jack Kemp, and Chetan Nayak
      Topological materials hold much promise for quantum computers that are highly tolerant to errors, but the information can be corrupted by thermally excited quasiparticles. New numerical simulations show that in some materials, quantum information can be protected for much longer than expected.
      [Phys. Rev. X 7, 041062] Published Wed Dec 13, 2017
      Citation: Phys. Rev. X 7, 041062 (2017)
      PubDate: 2017-12-13T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041062
      Issue No: Vol. 7, No. 4 (2017)
       
  • Coherent Many-Body Spin Dynamics in a Long-Range Interacting Ising Chain

    • Authors: Johannes Zeiher; Jae-yoon Choi, Antonio Rubio-Abadal, Thomas Pohl, Rick van Bijnen, Immanuel Bloch, Christian Gross
      First page: 041063
      Abstract: Author(s): Johannes Zeiher, Jae-yoon Choi, Antonio Rubio-Abadal, Thomas Pohl, Rick van Bijnen, Immanuel Bloch, and Christian Gross
      Quantum annealing is an approach to quantum computing that could offer fast, efficient solutions to certain types of complex problems. New experiments take an important step toward implementing a cold-atom-based quantum annealer that relies on coherent many-body interactions between Rydberg states in cold atomic gases.
      [Phys. Rev. X 7, 041063] Published Thu Dec 14, 2017
      Citation: Phys. Rev. X 7, 041063 (2017)
      PubDate: 2017-12-14T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041063
      Issue No: Vol. 7, No. 4 (2017)
       
  • Anomalous Grain Growth in a Polycrystalline Monolayer of Colloidal Hard
           Spheres

    • Authors: François A. Lavergne; Dirk G. A. L. Aarts, Roel P. A. Dullens
      First page: 041064
      Abstract: Author(s): François A. Lavergne, Dirk G. A. L. Aarts, and Roel P. A. Dullens
      Experimental observations of the rate at which crystalline grains grow in polycrystalline materials often differ markedly from theoretical predictions. New experiments reveal the physical mechanism that determines this rate and lead to robust theoretical expressions that describe how grains grow.
      [Phys. Rev. X 7, 041064] Published Thu Dec 14, 2017
      Citation: Phys. Rev. X 7, 041064 (2017)
      PubDate: 2017-12-14T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041064
      Issue No: Vol. 7, No. 4 (2017)
       
  • External Potential Modifies Friction of Molecular Solutes in Water

    • Authors: Jan O. Daldrop; Bartosz G. Kowalik, Roland R. Netz
      First page: 041065
      Abstract: Author(s): Jan O. Daldrop, Bartosz G. Kowalik, and Roland R. Netz
      Stokes’ law states that the friction coefficient of an object in a solvent does not depend on an external confining potential, but this assumption turns out not to be true. New simulations show that a methane molecule in water experiences a significant increase in its friction coefficient, a finding which has wide ranging implications for understanding molecular dynamics in solvents.
      [Phys. Rev. X 7, 041065] Published Thu Dec 14, 2017
      Citation: Phys. Rev. X 7, 041065 (2017)
      PubDate: 2017-12-14T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041065
      Issue No: Vol. 7, No. 4 (2017)
       
  • Superconductivity-Insensitive Order at $q∼1/4$ in Electron-Doped
           Cuprates

    • Authors: H. Jang; S. Asano, M. Fujita, M. Hashimoto, D. H. Lu, C. A. Burns, C.-C. Kao, J.-S. Lee
      First page: 041066
      Abstract: Author(s): H. Jang, S. Asano, M. Fujita, M. Hashimoto, D. H. Lu, C. A. Burns, C.-C. Kao, and J.-S. Lee
      Charge-density waves (CDWs) in the normal state of cuprates could shed light on the physics of their high-temperature superconductivity. New experiments, however, show no evidence for such waves in an electron-doped cuprate, which means the universality of CDWs in cuprates has yet to be confirmed.
      [Phys. Rev. X 7, 041066] Published Fri Dec 15, 2017
      Citation: Phys. Rev. X 7, 041066 (2017)
      PubDate: 2017-12-15T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041066
      Issue No: Vol. 7, No. 4 (2017)
       
  • Weakly-Correlated Nature of Ferromagnetism in Nonsymmorphic
           ${\mathrm{CrO}}_{2}$ Revealed by Bulk-Sensitive Soft-X-Ray ARPES

    • Authors: F. Bisti; V. A. Rogalev, M. Karolak, S. Paul, A. Gupta, T. Schmitt, G. Güntherodt, V. Eyert, G. Sangiovanni, G. Profeta, V. N. Strocov
      First page: 041067
      Abstract: Author(s): F. Bisti, V. A. Rogalev, M. Karolak, S. Paul, A. Gupta, T. Schmitt, G. Güntherodt, V. Eyert, G. Sangiovanni, G. Profeta, and V. N. Strocov
      Half-metals such as chromium dioxide behave as metals in one spin orientation and insulators or semiconductors in the opposite one. New measurements of the electronic structure of CrO2 provide clear insight, for the first time, into the role that electronic correlations play in affecting this behavior.
      [Phys. Rev. X 7, 041067] Published Tue Dec 19, 2017
      Citation: Phys. Rev. X 7, 041067 (2017)
      PubDate: 2017-12-19T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041067
      Issue No: Vol. 7, No. 4 (2017)
       
  • Quantum Hall Ferroelectrics and Nematics in Multivalley Systems

    • Authors: Inti Sodemann; Zheng Zhu, Liang Fu
      First page: 041068
      Abstract: Author(s): Inti Sodemann, Zheng Zhu, and Liang Fu
      Landau levels, the quantization of cyclotron orbits of electrons in a magnetic field, can give rise to a rich array of behaviors in materials. A new analysis reveals a new type of state that breaks inversion symmetry and arises when a few Landau levels have nearly the same energy.
      [Phys. Rev. X 7, 041068] Published Fri Dec 22, 2017
      Citation: Phys. Rev. X 7, 041068 (2017)
      PubDate: 2017-12-22T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041068
      Issue No: Vol. 7, No. 4 (2017)
       
  • Topological Classification of Crystalline Insulators through Band
           Structure Combinatorics

    • Authors: Jorrit Kruthoff; Jan de Boer, Jasper van Wezel, Charles L. Kane, Robert-Jan Slager
      First page: 041069
      Abstract: Author(s): Jorrit Kruthoff, Jan de Boer, Jasper van Wezel, Charles L. Kane, and Robert-Jan Slager
      The celebrated “tenfold way” provides a scheme for categorizing general topological states of matter, but it does not take into account the crystal symmetries that always exist in real materials. A new method extends this organization to allow the categorization of all topologically distinct electronic band structures in materials with only crystal symmetries for any number of physically relevant dimensions.
      [Phys. Rev. X 7, 041069] Published Fri Dec 22, 2017
      Citation: Phys. Rev. X 7, 041069 (2017)
      PubDate: 2017-12-22T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041069
      Issue No: Vol. 7, No. 4 (2017)
       
  • The Complexity of Folding Self-Folding Origami

    • Authors: Menachem Stern; Matthew B. Pinson, Arvind Murugan
      First page: 041070
      Abstract: Author(s): Menachem Stern, Matthew B. Pinson, and Arvind Murugan
      Self-deploying materials based on principles of origami have many potential technological uses, but can be limited by hidden complexities in their folding behavior. A new analysis explores these limits and offers strategies for avoiding these undesired traps.
      [Phys. Rev. X 7, 041070] Published Fri Dec 22, 2017
      Citation: Phys. Rev. X 7, 041070 (2017)
      PubDate: 2017-12-22T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041070
      Issue No: Vol. 7, No. 4 (2017)
       
  • Neutral Theory and Scale-Free Neural Dynamics

    • Authors: Matteo Martinello; Jorge Hidalgo, Amos Maritan, Serena di Santo, Dietmar Plenz, Miguel A. Muñoz
      First page: 041071
      Abstract: Author(s): Matteo Martinello, Jorge Hidalgo, Amos Maritan, Serena di Santo, Dietmar Plenz, and Miguel A. Muñoz
      Highly variable, perpetual activity in the brain is thought to arise from the cortex operating close to a phase transition. New theoretical models propose a more general scenario: changes in neural dynamics unfold according to neutral drift, guided by stochastic effects.
      [Phys. Rev. X 7, 041071] Published Tue Dec 26, 2017
      Citation: Phys. Rev. X 7, 041071 (2017)
      PubDate: 2017-12-26T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041071
      Issue No: Vol. 7, No. 4 (2017)
       
  • Nearly Deconfined Spinon Excitations in the Square-Lattice Spin-$1/2$
           Heisenberg Antiferromagnet

    • Authors: Hui Shao; Yan Qi Qin, Sylvain Capponi, Stefano Chesi, Zi Yang Meng, Anders W. Sandvik
      First page: 041072
      Abstract: Author(s): Hui Shao, Yan Qi Qin, Sylvain Capponi, Stefano Chesi, Zi Yang Meng, and Anders W. Sandvik
      Spin waves traveling in certain directions within antiferromagnetic materials appear to be unstable and likely to split up into spinons. New simulations show that, actually, these abnormal spin waves aren’t unstable, but rather fluctuate between spin waves and spinons.
      [Phys. Rev. X 7, 041072] Published Thu Dec 28, 2017
      Citation: Phys. Rev. X 7, 041072 (2017)
      PubDate: 2017-12-28T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041072
      Issue No: Vol. 7, No. 4 (2017)
       
  • Surface Floating 2D Bands in Layered Nonsymmorphic Semimetals: ZrSiS and
           Related Compounds

    • Authors: Andreas Topp; Raquel Queiroz, Andreas Grüneis, Lukas Müchler, Andreas W. Rost, Andrei Varykhalov, Dmitry Marchenko, Maxim Krivenkov, Fanny Rodolakis, Jessica L. McChesney, Bettina V. Lotsch, Leslie M. Schoop, Christian R. Ast
      First page: 041073
      Abstract: Author(s): Andreas Topp, Raquel Queiroz, Andreas Grüneis, Lukas Müchler, Andreas W. Rost, Andrei Varykhalov, Dmitry Marchenko, Maxim Krivenkov, Fanny Rodolakis, Jessica L. McChesney, Bettina V. Lotsch, Leslie M. Schoop, and Christian R. Ast
      While there are many explanations for the variety of material surface states, which can reveal interesting surface details and bulk properties, researchers lack an understanding of how these states arise in nonsymmorphic square-net semimetals. New experiments and calculations reveal that surface states in the compound ZrSiS come about because of nonsymmorphic symmetry breaking at the surface.
      [Phys. Rev. X 7, 041073] Published Thu Dec 28, 2017
      Citation: Phys. Rev. X 7, 041073 (2017)
      PubDate: 2017-12-28T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.041073
      Issue No: Vol. 7, No. 4 (2017)
       
  • Publisher’s Note: Spatiotemporal Optical Vortices [Phys. Rev. X
           6, 031037 (2016)]

    • Authors: N. Jhajj; I. Larkin, E. W. Rosenthal, S. Zahedpour, J. K. Wahlstrand, H. M. Milchberg
      First page: 049901
      Abstract: Author(s): N. Jhajj, I. Larkin, E. W. Rosenthal, S. Zahedpour, J. K. Wahlstrand, and H. M. Milchberg
      [Phys. Rev. X 7, 049901] Published Fri Dec 29, 2017
      Citation: Phys. Rev. X 7, 049901 (2017)
      PubDate: 2017-12-29T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.049901
      Issue No: Vol. 7, No. 4 (2017)
       
  • Squeezed Thermal Reservoirs as a Resource for a Nanomechanical Engine
           beyond the Carnot Limit

    • Authors: Jan Klaers; Stefan Faelt, Atac Imamoglu, Emre Togan
      First page: 031044
      Abstract: Author(s): Jan Klaers, Stefan Faelt, Atac Imamoglu, and Emre Togan
      A tiny engine can surpass the Carnot limit of efficiency when researchers engineer the thermal properties of the environment.
      [Phys. Rev. X 7, 031044] Published Wed Sep 13, 2017
      Citation: Phys. Rev. X 7, 031044 (2017)
      PubDate: 2017-09-13T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.031044
      Issue No: Vol. 7, No. 3 (2017)
       
  • Noise Gated by Dendrosomatic Interactions Increases Information
           Transmission

    • Authors: Richard Naud; Alexandre Payeur, André Longtin
      First page: 031045
      Abstract: Author(s): Richard Naud, Alexandre Payeur, and André Longtin
      Brains process information reliably despite the presence of noise introduced by their molecular machinery. New computer simulations of neurons show that these cells might use noise to their advantage by employing dendrites to detect low-intensity signals and using the main cell body to process more powerful signals.
      [Phys. Rev. X 7, 031045] Published Wed Sep 13, 2017
      Citation: Phys. Rev. X 7, 031045 (2017)
      PubDate: 2017-09-13T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.031045
      Issue No: Vol. 7, No. 3 (2017)
       
  • Flat Engineered Multichannel Reflectors

    • Authors: V. S. Asadchy; A. Díaz-Rubio, S. N. Tcvetkova, D.-H. Kwon, A. Elsakka, M. Albooyeh, S. A. Tretyakov
      First page: 031046
      Abstract: Author(s): V. S. Asadchy, A. Díaz-Rubio, S. N. Tcvetkova, D.-H. Kwon, A. Elsakka, M. Albooyeh, and S. A. Tretyakov
      Diffractive optical components play a huge role in many applications, but they only work optimally when incident radiation hits them at a specific preordained angle. A new concept known as a multichannel metasurfaces, however, promises to control light coming and going from multiple directions at the same time, opening up intriguing possibilities for a range of novel optical devices.
      [Phys. Rev. X 7, 031046] Published Thu Sep 14, 2017
      Citation: Phys. Rev. X 7, 031046 (2017)
      PubDate: 2017-09-14T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.031046
      Issue No: Vol. 7, No. 3 (2017)
       
  • Quantum Butterfly Effect in Weakly Interacting Diffusive Metals

    • Authors: Aavishkar A. Patel; Debanjan Chowdhury, Subir Sachdev, Brian Swingle
      First page: 031047
      Abstract: Author(s): Aavishkar A. Patel, Debanjan Chowdhury, Subir Sachdev, and Brian Swingle
      Chaos in quantum systems of many interacting particles leads to information scrambling, which underlies diverse fields from black holes to entanglement production. A new analysis determines a fundamental speed at which information spreads in a common example of a quantum many-body system, which could lead to broader insights into information dynamics.
      [Phys. Rev. X 7, 031047] Published Thu Sep 14, 2017
      Citation: Phys. Rev. X 7, 031047 (2017)
      PubDate: 2017-09-14T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.031047
      Issue No: Vol. 7, No. 3 (2017)
       
  • Combining Topological Hardware and Topological Software: Color-Code
           Quantum Computing with Topological Superconductor Networks

    • Authors: Daniel Litinski; Markus S. Kesselring, Jens Eisert, Felix von Oppen
      First page: 031048
      Abstract: Author(s): Daniel Litinski, Markus S. Kesselring, Jens Eisert, and Felix von Oppen
      Preserving the delicate states that store information in a quantum computer when dealing with a noisy environment is a considerable challenge, and many researchers are turning to hardware- and software-based topological protection as a solution. A new paradigm based on error-correcting color codes combines the advantages of both hardware and software and enables a scalable approach to fault-tolerant quantum computing.
      [Phys. Rev. X 7, 031048] Published Fri Sep 15, 2017
      Citation: Phys. Rev. X 7, 031048 (2017)
      PubDate: 2017-09-15T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.031048
      Issue No: Vol. 7, No. 3 (2017)
       
  • Quantum Spin Lenses in Atomic Arrays

    • Authors: A. W. Glaetzle; K. Ender, D. S. Wild, S. Choi, H. Pichler, M. D. Lukin, P. Zoller
      First page: 031049
      Abstract: Author(s): A. W. Glaetzle, K. Ender, D. S. Wild, S. Choi, H. Pichler, M. D. Lukin, and P. Zoller
      In quantum computing, atomic ensembles can efficiently map “flying” photonic qubits onto stationary qubits. These absorbed photons, however, end up encoded in delocalized states that preclude local processing. A new concept called a “quantum spin lens” could focus delocalized excitations onto a single atom, which can then be manipulated using standard quantum computing tools.
      [Phys. Rev. X 7, 031049] Published Wed Sep 20, 2017
      Citation: Phys. Rev. X 7, 031049 (2017)
      PubDate: 2017-09-20T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.031049
      Issue No: Vol. 7, No. 3 (2017)
       
  • Entanglement-Based dc Magnetometry with Separated Ions

    • Authors: T. Ruster; H. Kaufmann, M. A. Luda, V. Kaushal, C. T. Schmiegelow, F. Schmidt-Kaler, U. G. Poschinger
      First page: 031050
      Abstract: Author(s): T. Ruster, H. Kaufmann, M. A. Luda, V. Kaushal, C. T. Schmiegelow, F. Schmidt-Kaler, and U. G. Poschinger
      Magnetometers based on the spins of single electrons offer a way to precisely characterize magnetic fields at microscopic scales but are highly sensitive to noisy environments. New experiments show a way to build a more robust single-spin magnetometer using entangled calcium ions.
      [Phys. Rev. X 7, 031050] Published Thu Sep 21, 2017
      Citation: Phys. Rev. X 7, 031050 (2017)
      PubDate: 2017-09-21T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.031050
      Issue No: Vol. 7, No. 3 (2017)
       
  • Deconfined Quantum Critical Points: Symmetries and Dualities

    • Authors: Chong Wang; Adam Nahum, Max A. Metlitski, Cenke Xu, T. Senthil
      First page: 031051
      Abstract: Author(s): Chong Wang, Adam Nahum, Max A. Metlitski, Cenke Xu, and T. Senthil
      Different theories can be used to describe the same behavior in quantum matter, a concept known as duality. A new analysis uses duality to connect ideas in quantum electrodynamics with a type of quantum magnet known as a deconfined quantum critical point and reveal new properties of both.
      [Phys. Rev. X 7, 031051] Published Fri Sep 22, 2017
      Citation: Phys. Rev. X 7, 031051 (2017)
      PubDate: 2017-09-22T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.031051
      Issue No: Vol. 7, No. 3 (2017)
       
  • Duality between the Deconfined Quantum-Critical Point and the Bosonic
           Topological Transition

    • Authors: Yan Qi Qin; Yuan-Yao He, Yi-Zhuang You, Zhong-Yi Lu, Arnab Sen, Anders W. Sandvik, Cenke Xu, Zi Yang Meng
      First page: 031052
      Abstract: Author(s): Yan Qi Qin, Yuan-Yao He, Yi-Zhuang You, Zhong-Yi Lu, Arnab Sen, Anders W. Sandvik, Cenke Xu, and Zi Yang Meng
      Proving an equivalence between two theories—one that describes a transition between two kinds of insulating states and another that models changes between spin states—would offer a step toward a unified theoretical understanding of different condensed-matter systems. New computer simulations provide evidence for this duality by showing that the critical points of these two theories have identical properties.
      [Phys. Rev. X 7, 031052] Published Fri Sep 22, 2017
      Citation: Phys. Rev. X 7, 031052 (2017)
      PubDate: 2017-09-22T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.031052
      Issue No: Vol. 7, No. 3 (2017)
       
  • Polaron-Driven Surface Reconstructions

    • Authors: Michele Reticcioli; Martin Setvin, Xianfeng Hao, Peter Flauger, Georg Kresse, Michael Schmid, Ulrike Diebold, Cesare Franchini
      First page: 031053
      Abstract: Author(s): Michele Reticcioli, Martin Setvin, Xianfeng Hao, Peter Flauger, Georg Kresse, Michael Schmid, Ulrike Diebold, and Cesare Franchini
      Surface reconstructions in cleaved crystals are generally thought to be driven by charge transfer between surface atoms. New calculations and experiments with rutile titanium dioxide exhibit a radically different mechanism based on charge trapping, which could open up novel ways of designing crystal surfaces for a range of applications.
      [Phys. Rev. X 7, 031053] Published Mon Sep 25, 2017
      Citation: Phys. Rev. X 7, 031053 (2017)
      PubDate: 2017-09-25T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.031053
      Issue No: Vol. 7, No. 3 (2017)
       
  • Bulk Rotational Symmetry Breaking in Kondo Insulator ${\mathrm{SmB}}_{6}$

    • Authors: Z. Xiang; B. Lawson, T. Asaba, C. Tinsman, Lu Chen, C. Shang, X. H. Chen, Lu Li
      First page: 031054
      Abstract: Author(s): Z. Xiang, B. Lawson, T. Asaba, C. Tinsman, Lu Chen, C. Shang, X. H. Chen, and Lu Li
      Kondo insulators exhibit strong electronic interactions and topological protection, making them a good platform for studying connections between these two fields. New experiments show that a type of magnetic oscillation (the de Hass-van Alphen effect) originates in the surface of a Kondo insulator, bolstering evidence for topologically protected surface states.
      [Phys. Rev. X 7, 031054] Published Mon Sep 25, 2017
      Citation: Phys. Rev. X 7, 031054 (2017)
      PubDate: 2017-09-25T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.031054
      Issue No: Vol. 7, No. 3 (2017)
       
  • Quantum Correlations of Light from a Room-Temperature Mechanical
           Oscillator

    • Authors: V. Sudhir; R. Schilling, S. A. Fedorov, H. Schütz, D. J. Wilson, T. J. Kippenberg
      First page: 031055
      Abstract: Author(s): V. Sudhir, R. Schilling, S. A. Fedorov, H. Schütz, D. J. Wilson, and T. J. Kippenberg
      When light reflects off a mirror, its intensity and phase become quantum correlated as a result of radiation pressure. These correlations could be used to erase quantum backaction, which poses a fundamental limit to the precision of interferometric displacement measurements. For the first time, these correlations are observed and exploited in a room-temperature interferometer, which could lead to advances in quantum-enhanced metrology.
      [Phys. Rev. X 7, 031055] Published Tue Sep 26, 2017
      Citation: Phys. Rev. X 7, 031055 (2017)
      PubDate: 2017-09-26T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.031055
      Issue No: Vol. 7, No. 3 (2017)
       
  • Super-Resolution Community Detection for Layer-Aggregated Multilayer
           Networks

    • Authors: Dane Taylor; Rajmonda S. Caceres, Peter J. Mucha
      First page: 031056
      Abstract: Author(s): Dane Taylor, Rajmonda S. Caceres, and Peter J. Mucha
      Detecting anomalous clusters within networks is vital to cybersecurity in detecting attacks and intrusions, but such analysis is typically ad hoc with no overarching, unifying methodology. A new analysis shows how layer aggregation can be used in a variety of time-varying networks as a filter for preprocessing data to allow the detection of communities that would otherwise go unnoticed.
      [Phys. Rev. X 7, 031056] Published Tue Sep 26, 2017
      Citation: Phys. Rev. X 7, 031056 (2017)
      PubDate: 2017-09-26T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.031056
      Issue No: Vol. 7, No. 3 (2017)
       
  • Exploring Interacting Topological Insulators with Ultracold Atoms: The
           Synthetic Creutz-Hubbard Model

    • Authors: J. Jünemann; A. Piga, S.-J. Ran, M. Lewenstein, M. Rizzi, A. Bermudez
      First page: 031057
      Abstract: Author(s): J. Jünemann, A. Piga, S.-J. Ran, M. Lewenstein, M. Rizzi, and A. Bermudez
      Understanding the behavior of topological phases of matter in the presence of strong interactions and correlations is one of the big challenges in modern physics. New theoretical work analyzes a potential platform for addressing these challenges and proposes how it might be implemented in a one-dimensional optical lattice.
      [Phys. Rev. X 7, 031057] Published Wed Sep 27, 2017
      Citation: Phys. Rev. X 7, 031057 (2017)
      PubDate: 2017-09-27T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.031057
      Issue No: Vol. 7, No. 3 (2017)
       
  • Non-Fermi Liquid at ($2+1$)$\mathrm{D}$ Ferromagnetic Quantum Critical
           Point

    • Authors: Xiao Yan Xu; Kai Sun, Yoni Schattner, Erez Berg, Zi Yang Meng
      First page: 031058
      Abstract: Author(s): Xiao Yan Xu, Kai Sun, Yoni Schattner, Erez Berg, and Zi Yang Meng
      The behavior of electrons near quantum critical points, such as magnetic phase transitions at temperatures approaching absolute zero, are of vital interest but are extremely challenging to understand. New computer simulations solve this problem, exactly, for one example of these strange metals and reveal a new type of quantum critical point.
      [Phys. Rev. X 7, 031058] Published Wed Sep 27, 2017
      Citation: Phys. Rev. X 7, 031058 (2017)
      PubDate: 2017-09-27T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.031058
      Issue No: Vol. 7, No. 3 (2017)
       
  • Towards the Solution of the Many-Electron Problem in Real Materials:
           Equation of State of the Hydrogen Chain with State-of-the-Art Many-Body
           Methods

    • Authors: 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, Shiwei Zhang (Simons Collaboration on the Many-Electron Problem)
      First page: 031059
      Abstract: Author(s): 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 (Simons Collaboration on the Many-Electron Problem)
      Understanding the collective behavior of many interacting electrons is a key challenge in fundamental physics and materials design. A benchmark study characterizes the accuracy and abilities of 16 methods for many-electron computations and applies these insights to determining the equation of state for an infinite chain of hydrogen atoms.
      [Phys. Rev. X 7, 031059] Published Thu Sep 28, 2017
      Citation: Phys. Rev. X 7, 031059 (2017)
      PubDate: 2017-09-28T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.031059
      Issue No: Vol. 7, No. 3 (2017)
       
  • Variational Identification of Markovian Transition States

    • Authors: Linda Martini; Adam Kells, Roberto Covino, Gerhard Hummer, Nicolae-Viorel Buchete, Edina Rosta
      First page: 031060
      Abstract: Author(s): Linda Martini, Adam Kells, Roberto Covino, Gerhard Hummer, Nicolae-Viorel Buchete, and Edina Rosta
      A new method for identifying and analyzing Markov states from molecular dynamics trajectories offers a novel and simple approach to analyzing the complex behavior in molecular processes, such as those seen in biological systems.
      [Phys. Rev. X 7, 031060] Published Thu Sep 28, 2017
      Citation: Phys. Rev. X 7, 031060 (2017)
      PubDate: 2017-09-28T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.031060
      Issue No: Vol. 7, No. 3 (2017)
       
  • Localization and Symmetry Breaking in the Quantum Quasiperiodic Ising
           Glass

    • Authors: A. Chandran; C. R. Laumann
      First page: 031061
      Abstract: Author(s): A. Chandran and C. R. Laumann
      In disordered quantum systems, magnetic domains might be localized, indefinitely preserving their initial states. A theoretical analysis shows that disorder is not necessary for protecting this order and can be accomplished via quasiperiodic modulations.
      [Phys. Rev. X 7, 031061] Published Fri Sep 29, 2017
      Citation: Phys. Rev. X 7, 031061 (2017)
      PubDate: 2017-09-29T10:00:00+00:00
      DOI: 10.1103/PhysRevX.7.031061
      Issue No: Vol. 7, No. 3 (2017)
       
 
 
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