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  • Author Correction: 15 years of Nature Physics
    Nat. Phys. (IF 19.256) Pub Date : 2020-11-24
    Alison Wright; Ed Gerstner; Richard Brierley; Andreas Trabesinger; May Chiao; Iulia Georgescu; Bart Verberck; Luke Fleet; Abigail Klopper; Andrea Taroni; Federico Levi; Yun Li; Jan Philip Kraack; David Abergel; Stefanie Reichert; Nina Meinzer; Elizaveta Dubrovina

    An amendment to this paper has been published and can be accessed via a link at the top of the paper.

    更新日期:2020-11-25
  • Living proof of effective defects
    Nat. Phys. (IF 19.256) Pub Date : 2020-11-23
    M.-A. Fardin; B. Ladoux

    A class of biological matter including elongated cells and filaments can be understood in the framework of active nematic liquid crystals. Within these systems, topological defects emerge and give rise to remarkable collective behaviours.

    更新日期:2020-11-23
  • Topological defects promote layer formation in Myxococcus xanthus colonies
    Nat. Phys. (IF 19.256) Pub Date : 2020-11-23
    Katherine Copenhagen; Ricard Alert; Ned S. Wingreen; Joshua W. Shaevitz

    The soil bacterium Myxococcus xanthus lives in densely packed groups that form dynamic three-dimensional patterns in response to environmental changes, such as droplet-like fruiting bodies during starvation1. The development of these multicellular structures begins with the sequential formation of cell layers in a process that is poorly understood2. Here, using confocal three-dimensional imaging, we

    更新日期:2020-11-23
  • Bacteria solve the problem of crowding by moving slowly
    Nat. Phys. (IF 19.256) Pub Date : 2020-11-23
    O. J. Meacock; A. Doostmohammadi; K. R. Foster; J. M. Yeomans; W. M. Durham

    Bacteria commonly live attached to surfaces in dense collectives containing billions of cells1. While it is known that motility allows these groups to expand en masse into new territory2,3,4,5, how bacteria collectively move across surfaces under such tightly packed conditions remains poorly understood. Here we combine experiments, cell tracking and individual-based modelling to study the pathogen

    更新日期:2020-11-23
  • Topological defects in the nematic order of actin fibres as organization centres of Hydra morphogenesis
    Nat. Phys. (IF 19.256) Pub Date : 2020-11-23
    Yonit Maroudas-Sacks; Liora Garion; Lital Shani-Zerbib; Anton Livshits; Erez Braun; Kinneret Keren

    Animal morphogenesis arises from the complex interplay between multiple mechanical and biochemical processes with mutual feedback. Developing an effective, coarse-grained description of morphogenesis is essential for understanding how these processes are coordinated across scales to form robust, functional outcomes. Here we show that the nematic order of the supracellular actin fibres in regenerating

    更新日期:2020-11-23
  • High-harmonic generation from topological surface states
    Nat. Phys. (IF 19.256) Pub Date : 2020-11-23
    Ya Bai; Fucong Fei; Shuo Wang; Na Li; Xiaolu Li; Fengqi Song; Ruxin Li; Zhizhan Xu; Peng Liu

    Three-dimensional topological insulators are a phase of matter that hosts unique spin-polarized gapless surface states that are protected by time-reversal symmetry. They exhibit unconventional charge and spin transport properties1,2. Intense laser fields can drive ballistic charge dynamics in Dirac bands3,4 or they can coherently steer spin5 and valley pseudospin6. Similarly, high-harmonic generation

    更新日期:2020-11-23
  • A solid look at molecules
    Nat. Phys. (IF 19.256) Pub Date : 2020-11-16
    Laura Cattaneo

    When molecular model systems, such as polycyclic aromatic hydrocarbons, are ionized by ultrashort extreme ultraviolet pulses, their relaxation path proceeds via electron–phonon scattering, linking molecules to typical solid-state matter behaviour.

    更新日期:2020-11-16
  • Ultrafast dynamics of correlation bands following XUV molecular photoionization
    Nat. Phys. (IF 19.256) Pub Date : 2020-11-16
    M. Hervé; V. Despré; P. Castellanos Nash; V. Loriot; A. Boyer; A. Scognamiglio; G. Karras; R. Brédy; E. Constant; A. G. G. M. Tielens; A. I. Kuleff; F. Lépine

    Modern ultrashort X-ray/XUV (extreme ultraviolet) sources provide unique opportunities to investigate the primary reactions of matter upon energetic excitation. Understanding these processes in molecules on ultrafast timescales is required to improve bespoke high-energy radiation detectors, nanomedicine schemes or to study the molecular composition of interstellar media. However, current experiments

    更新日期:2020-11-16
  • Ultrafast spin current generated from an antiferromagnet
    Nat. Phys. (IF 19.256) Pub Date : 2020-11-16
    Hongsong Qiu; Lifan Zhou; Caihong Zhang; Jingbo Wu; Yuanzhe Tian; Shaodong Cheng; Shaobo Mi; Haibin Zhao; Qi Zhang; Di Wu; Biaobing Jin; Jian Chen; Peiheng Wu

    Antiferromagnets (AFMs) have the potential to push spintronic devices from a static condition or gigahertz frequency range to the terahertz range for the sake of high-speed processing. However, the insensitivity of AFMs to magnetic fields makes the manipulation of spin currents difficult. The ultrafast generation of the spin current in ferromagnet/heavy-metal (HM) structures has received a lot of attention

    更新日期:2020-11-16
  • Contact between nucleons
    Nat. Phys. (IF 19.256) Pub Date : 2020-11-09
    Michael Urban

    The contact formalism describes short-range correlations, which play a crucial role in nuclear systems. Initially introduced for ultracold atoms, its generalization to the nuclear case was now validated by ab initio calculations.

    更新日期:2020-11-09
  • Many-body factorization and position–momentum equivalence of nuclear short-range correlations
    Nat. Phys. (IF 19.256) Pub Date : 2020-11-09
    R. Cruz-Torres; D. Lonardoni; R. Weiss; M. Piarulli; N. Barnea; D. W. Higinbotham; E. Piasetzky; A. Schmidt; L. B. Weinstein; R. B. Wiringa; O. Hen

    While mean-field approximations, such as the nuclear shell model, provide a good description of many bulk nuclear properties, they fail to capture the important effects of nucleon–nucleon correlations such as the short-distance and high-momentum components of the nuclear many-body wave function1. Here, we study these components using the effective pair-based generalized contact formalism2,3 and ab

    更新日期:2020-11-09
  • Author Correction: Imaging emergent heavy Dirac fermions of a topological Kondo insulator
    Nat. Phys. (IF 19.256) Pub Date : 2020-11-04
    Harris Pirie; Yu Liu; Anjan Soumyanarayanan; Pengcheng Chen; Yang He; M. M. Yee; P. F. S. Rosa; J. D. Thompson; Dae-Jeong Kim; Z. Fisk; Xiangfeng Wang; Johnpierre Paglione; Dirk K. Morr; M. H. Hamidian; Jennifer E. Hoffman

    An amendment to this paper has been published and can be accessed via a link at the top of the paper.

    更新日期:2020-11-04
  • Author Correction: High-fidelity entanglement and detection of alkaline-earth Rydberg atoms
    Nat. Phys. (IF 19.256) Pub Date : 2020-11-04
    Ivaylo S. Madjarov; Jacob P. Covey; Adam L. Shaw; Joonhee Choi; Anant Kale; Alexandre Cooper; Hannes Pichler; Vladimir Schkolnik; Jason R. Williams; Manuel Endres

    An amendment to this paper has been published and can be accessed via a link at the top of the paper.

    更新日期:2020-11-04
  • Publisher Correction: Interacting topological edge channels
    Nat. Phys. (IF 19.256) Pub Date : 2020-11-04
    Jonas Strunz; Jonas Wiedenmann; Christoph Fleckenstein; Lukas Lunczer; Wouter Beugeling; Valentin L. Müller; Pragya Shekhar; Niccolò Traverso Ziani; Saquib Shamim; Johannes Kleinlein; Hartmut Buhmann; Björn Trauzettel; Laurens W. Molenkamp

    An amendment to this paper has been published and can be accessed via a link at the top of the paper.

    更新日期:2020-11-04
  • Disentangling scaling arguments to empower complex systems analysis
    Nat. Phys. (IF 19.256) Pub Date : 2020-11-02
    Marc Timme; Malte Schröder

    Scaling arguments provide valuable analysis tools across physics and complex systems yet are often employed as one generic method, without explicit reference to the various mathematical concepts underlying them. A careful understanding of these concepts empowers us to unlock their full potential.

    更新日期:2020-11-02
  • The sound of weights and measures
    Nat. Phys. (IF 19.256) Pub Date : 2020-11-02
    Noa Hegesh

    In first-century China, emperor Wang Mang standardized weights and measures in his newly established dynasty. Noa Hegesh tells the story of sound as the basis for this standardization.

    更新日期:2020-11-02
  • In this galaxy far, far away
    Nat. Phys. (IF 19.256) Pub Date : 2020-11-02

    The Nobel Prize in Physics 2020 has been awarded to Roger Penrose for his work on black hole formation, and to Andrea Ghez and Reinhard Genzel for their observation of a supermassive compact object at the Galactic Centre.

    更新日期:2020-11-02
  • Clock comparison using black holes
    Nat. Phys. (IF 19.256) Pub Date : 2020-10-29
    Rüdiger Haas

    Observing accreting black holes in the early Universe allows precise comparison of clocks over intercontinental distances on Earth. This is achieved with a novel observation strategy using the next generation of very long baseline interferometry systems.

    更新日期:2020-10-30
  • Publisher Correction: Ultrasound evidence for a two-component superconducting order parameter in Sr 2 RuO 4
    Nat. Phys. (IF 19.256) Pub Date : 2020-10-28
    S. Benhabib; C. Lupien; I. Paul; L. Berges; M. Dion; M. Nardone; A. Zitouni; Z. Q. Mao; Y. Maeno; A. Georges; L. Taillefer; C. Proust

    An amendment to this paper has been published and can be accessed via a link at the top of the paper.

    更新日期:2020-10-29
  • The Heisenberg limit for laser coherence
    Nat. Phys. (IF 19.256) Pub Date : 2020-10-26
    Travis J. Baker; Seyed N. Saadatmand; Dominic W. Berry; Howard M. Wiseman

    Quantum optical coherence can be quantified only by accounting for both the particle- and wave-nature of light. For an ideal laser beam1,2,3, the coherence can be thought of roughly as the number of photons emitted consecutively into the beam with the same phase. This number, \({\mathfrak{C}}\), can be much larger than the number of photons in the laser itself, μ. The limit for an ideal laser was thought

    更新日期:2020-10-28
  • Isotopy and energy of physical networks
    Nat. Phys. (IF 19.256) Pub Date : 2020-10-19
    Yanchen Liu; Nima Dehmamy; Albert-László Barabási

    While the structural characteristics of a network are uniquely determined by its adjacency matrix1,2,3, in physical networks, such as the brain or the vascular system, the network’s three-dimensional layout also affects the system’s structure and function. We lack, however, the tools to distinguish physical networks with identical wiring but different geometrical layouts. To address this need, here

    更新日期:2020-10-19
  • Resonant phase-matching between a light wave and a free-electron wavefunction
    Nat. Phys. (IF 19.256) Pub Date : 2020-10-12
    Raphael Dahan; Saar Nehemia; Michael Shentcis; Ori Reinhardt; Yuval Adiv; Xihang Shi; Orr Be’er; Morgan H. Lynch; Yaniv Kurman; Kangpeng Wang; Ido Kaminer

    Quantum light–matter interactions of bound electron systems have been studied extensively. By contrast, quantum interactions of free electrons with light have only become accessible in recent years, following the discovery of photon-induced near-field electron microscopy (PINEM). So far, the fundamental free electron–light interaction in all PINEM experiments has remained weak due to its localized

    更新日期:2020-10-12
  • Directional self-locomotion of active droplets enabled by nematic environment
    Nat. Phys. (IF 19.256) Pub Date : 2020-10-12
    Mojtaba Rajabi; Hend Baza; Taras Turiv; Oleg D. Lavrentovich

    Active matter composed of self-propelled interacting units holds a major promise for the extraction of useful work from its seemingly chaotic dynamics. Streamlining active matter is especially important at the microscale, where the viscous forces prevail over inertia and transport requires a non-reciprocal motion. Here we report that microscopic active droplets representing aqueous dispersions of swimming

    更新日期:2020-10-12
  • Electrically tunable correlated and topological states in twisted monolayer–bilayer graphene
    Nat. Phys. (IF 19.256) Pub Date : 2020-10-12
    Shaowen Chen; Minhao He; Ya-Hui Zhang; Valerie Hsieh; Zaiyao Fei; K. Watanabe; T. Taniguchi; David H. Cobden; Xiaodong Xu; Cory R. Dean; Matthew Yankowitz

    Twisted van der Waals heterostructures with flat electronic bands have recently emerged as a platform for realizing correlated and topological states with a high degree of control and tunability. In graphene-based moiré heterostructures, the correlated phase diagram and band topology depend on the number of graphene layers and the details of the external environment from the encapsulating crystals

    更新日期:2020-10-12
  • Author Correction: Spectroscopic fingerprint of charge order melting driven by quantum fluctuations in a cuprate
    Nat. Phys. (IF 19.256) Pub Date : 2020-10-09
    W. S. Lee; Ke-Jin Zhou; M. Hepting; J. Li; A. Nag; A. C. Walters; M. Garcia-Fernandez; H. C. Robarts; M. Hashimoto; H. Lu; B. Nosarzewski; D. Song; H. Eisaki; Z. X. Shen; B. Moritz; J. Zaanen; T. P. Devereaux

    An amendment to this paper has been published and can be accessed via a link at the top of the paper.

    更新日期:2020-10-11
  • Chaotic worms
    Nat. Phys. (IF 19.256) Pub Date : 2020-10-05
    Jane Loveless; Barbara Webb

    Animals seem capable of an infinite variety of movement, yet also exhibit substantial stereotypy in repeated actions. A beautiful view of worm behaviour now shows that the worm’s state evolves deterministically but is bounced chaotically between unstable periodic orbits.

    更新日期:2020-10-05
  • Scale-invariant magnetic anisotropy in RuCl 3 at high magnetic fields
    Nat. Phys. (IF 19.256) Pub Date : 2020-10-05
    K. A. Modic; Ross D. McDonald; J. P. C. Ruff; Maja D. Bachmann; You Lai; Johanna C. Palmstrom; David Graf; Mun K. Chan; F. F. Balakirev; J. B. Betts; G. S. Boebinger; Marcus Schmidt; Michael J. Lawler; D. A. Sokolov; Philip J. W. Moll; B. J. Ramshaw; Arkady Shekhter

    In RuCl3, inelastic neutron scattering and Raman spectroscopy reveal a continuum of non-spin-wave excitations that persists to high temperature, suggesting the presence of a spin liquid state on a honeycomb lattice. In the context of the Kitaev model, finite magnetic fields introduce interactions between the elementary excitations, and thus the effects of high magnetic fields that are comparable to

    更新日期:2020-10-05
  • Intercontinental comparison of optical atomic clocks through very long baseline interferometry
    Nat. Phys. (IF 19.256) Pub Date : 2020-10-05
    Marco Pizzocaro; Mamoru Sekido; Kazuhiro Takefuji; Hideki Ujihara; Hidekazu Hachisu; Nils Nemitz; Masanori Tsutsumi; Tetsuro Kondo; Eiji Kawai; Ryuichi Ichikawa; Kunitaka Namba; Yoshihiro Okamoto; Rumi Takahashi; Junichi Komuro; Cecilia Clivati; Filippo Bregolin; Piero Barbieri; Alberto Mura; Elena Cantoni; Giancarlo Cerretto; Filippo Levi; Giuseppe Maccaferri; Mauro Roma; Claudio Bortolotti; Monia

    The comparison of distant atomic clocks is foundational to international timekeeping, global positioning and tests of fundamental physics. Optical-fibre links allow the most precise optical clocks to be compared, without degradation, over intracontinental distances up to thousands of kilometres, but intercontinental comparisons remain limited by the performance of satellite transfer techniques. Here

    更新日期:2020-10-05
  • Capturing the continuous complexity of behaviour in Caenorhabditis elegans
    Nat. Phys. (IF 19.256) Pub Date : 2020-10-05
    Tosif Ahamed; Antonio C. Costa; Greg J. Stephens

    Animal behaviour is often quantified through subjective, incomplete variables that mask essential dynamics. Here, we develop a maximally predictive behavioural-state space from multivariate measurements, in which the full instantaneous state is smoothly unfolded as a combination of short-time posture sequences. In the off-food behaviour of the roundworm Caenorhabditis elegans, we discover a low-dimensional

    更新日期:2020-10-05
  • Metrology on a grand scale
    Nat. Phys. (IF 19.256) Pub Date : 2020-10-01
    John Villanueva

    The assembly of the more than a million single parts of the ITER tokamak requires large-scale three-dimensional precision metrology. John Villanueva Jr gives us insights into the complexity of this project.

    更新日期:2020-10-02
  • Sweet fifteen
    Nat. Phys. (IF 19.256) Pub Date : 2020-10-01

    As Nature Physics turns fifteen, we celebrate some of our favourite papers.

    更新日期:2020-10-02
  • 15 years of Nature Physics
    Nat. Phys. (IF 19.256) Pub Date : 2020-10-01
    Alison Wright; Ed Gerstner; Richard Brierley; Andreas Trabesinger; May Chiao; Iulia Georgescu; Bart Verberck; Luke Fleet; Abigail Klopper; Andrea Taroni; Federico Levi; Yun Li; Jan Philip Kraack; David Abergel; Stefanie Reichert; Nina Meinzer; Elizaveta Dubrovina

    Over the last 15 years, the content of Nature Physics has covered an enormous breadth of subjects at the forefront of physics. The journal’s past and present editors recount their favourite papers and what made chaperoning them to publication special.

    更新日期:2020-10-02
  • Herding an evolving biological population with quantum control tools
    Nat. Phys. (IF 19.256) Pub Date : 2020-09-30
    Daniel M. Weinreich

    Populations of organisms can be regarded as clouds of genetic variants evolving passively in response to mutation and natural selection. Counterdiabatic driving — a tool borrowed from quantum control — now offers the possibility of actively controlling both the rate and route followed by an evolving population.

    更新日期:2020-09-30
  • Observation of flat bands in twisted bilayer graphene
    Nat. Phys. (IF 19.256) Pub Date : 2020-09-28
    Simone Lisi; Xiaobo Lu; Tjerk Benschop; Tobias A. de Jong; Petr Stepanov; Jose R. Duran; Florian Margot; Irène Cucchi; Edoardo Cappelli; Andrew Hunter; Anna Tamai; Viktor Kandyba; Alessio Giampietri; Alexei Barinov; Johannes Jobst; Vincent Stalman; Maarten Leeuwenhoek; Kenji Watanabe; Takashi Taniguchi; Louk Rademaker; Sense Jan van der Molen; Milan P. Allan; Dmitri K. Efetov; Felix Baumberger

    Transport experiments in twisted bilayer graphene have revealed multiple superconducting domes separated by correlated insulating states1,2,3,4,5. These properties are generally associated with strongly correlated states in a flat mini-band of the hexagonal moiré superlattice as was predicted by band structure calculations6,7,8. Evidence for the existence of a flat band comes from local tunnelling

    更新日期:2020-09-28
  • Theory of mechanochemical patterning and optimal migration in cell monolayers
    Nat. Phys. (IF 19.256) Pub Date : 2020-09-28
    Daniel Boocock; Naoya Hino; Natalia Ruzickova; Tsuyoshi Hirashima; Edouard Hannezo

    Collective cell migration offers a rich field of study for non-equilibrium physics and cellular biology, revealing phenomena such as glassy dynamics, pattern formation and active turbulence. However, how mechanical and chemical signalling are integrated at the cellular level to give rise to such collective behaviours remains unclear. We address this by focusing on the highly conserved phenomenon of

    更新日期:2020-09-28
  • Inertial spin dynamics in ferromagnets
    Nat. Phys. (IF 19.256) Pub Date : 2020-09-28
    Kumar Neeraj; Nilesh Awari; Sergey Kovalev; Debanjan Polley; Nanna Zhou Hagström; Sri Sai Phani Kanth Arekapudi; Anna Semisalova; Kilian Lenz; Bertram Green; Jan-Christoph Deinert; Igor Ilyakov; Min Chen; Mohammed Bawatna; Valentino Scalera; Massimiliano d’Aquino; Claudio Serpico; Olav Hellwig; Jean-Eric Wegrowe; Michael Gensch; Stefano Bonetti

    The understanding of how spins move and can be manipulated at pico- and femtosecond timescales has implications for ultrafast and energy-efficient data-processing and storage applications. However, the possibility of realizing commercial technologies based on ultrafast spin dynamics has been hampered by our limited knowledge of the physics behind processes on this timescale. Recently, it has been suggested

    更新日期:2020-09-28
  • A roadmap for the future
    Nat. Phys. (IF 19.256) Pub Date : 2020-09-24
    Fabiola Gianotti; Gian Francesco Giudice

    The particle physics community refreshes the roadmap for the field in Europe, taking into account the worldwide context, in the so-called European Strategy for Particle Physics update, which happens every seven years.

    更新日期:2020-09-24
  • An odd couple
    Nat. Phys. (IF 19.256) Pub Date : 2020-09-21
    Brian D’Urso; James Millen

    An atomic spin oscillator coupled to a mechanical membrane resonator forms an effective negative-mass oscillator. Entanglement in this hybrid quantum system is created by a backaction-evading position measurement, despite the macroscopic separation.

    更新日期:2020-09-21
  • The symmetry of superconducting Sr 2 RuO 4
    Nat. Phys. (IF 19.256) Pub Date : 2020-09-21
    Daniel F. Agterberg

    Ultrasound experiments reveal a multicomponent superconducting order parameter in Sr2RuO4.

    更新日期:2020-09-21
  • Ultrasound evidence for a two-component superconducting order parameter in Sr 2 RuO 4
    Nat. Phys. (IF 19.256) Pub Date : 2020-09-21
    S. Benhabib; C. Lupien; I. Paul; L. Berges; M. Dion; M. Nardone; A. Zitouni; Z. Q. Mao; Y. Maeno; A. Georges; L. Taillefer; C. Proust

    The quasi-two-dimensional metal Sr2RuO4 is one of the best characterized unconventional superconductors, yet the nature of its superconducting order parameter is still under debate1,2,3. This information is crucial to determine the pairing mechanism of Cooper pairs. Here we use ultrasound velocity to probe the superconducting state of Sr2RuO4. This thermodynamic probe is sensitive to the symmetry of

    更新日期:2020-09-21
  • Thermodynamic evidence for a two-component superconducting order parameter in Sr 2 RuO 4
    Nat. Phys. (IF 19.256) Pub Date : 2020-09-21
    Sayak Ghosh; Arkady Shekhter; F. Jerzembeck; N. Kikugawa; Dmitry A. Sokolov; Manuel Brando; A. P. Mackenzie; Clifford W. Hicks; B. J. Ramshaw

    Sr2RuO4 has stood as the leading candidate for a spin-triplet superconductor for 26 years1. However, recent NMR experiments have cast doubt on this candidacy2,3 and it is difficult to find a theory of superconductivity that is consistent with all experiments. The order parameter symmetry for this material therefore remains an open question. Symmetry-based experiments are needed that can rule out broad

    更新日期:2020-09-21
  • Entanglement between distant macroscopic mechanical and spin systems
    Nat. Phys. (IF 19.256) Pub Date : 2020-09-21
    Rodrigo A. Thomas; Michał Parniak; Christoffer Østfeldt; Christoffer B. Møller; Christian Bærentsen; Yeghishe Tsaturyan; Albert Schliesser; Jürgen Appel; Emil Zeuthen; Eugene S. Polzik

    Entanglement is an essential property of multipartite quantum systems, characterized by the inseparability of quantum states of objects regardless of their spatial separation. Generation of entanglement between increasingly macroscopic and disparate systems is an ongoing effort in quantum science, as it enables hybrid quantum networks, quantum-enhanced sensing and probing of the fundamental limits

    更新日期:2020-09-21
  • Machine learning the thermodynamic arrow of time
    Nat. Phys. (IF 19.256) Pub Date : 2020-09-21
    Alireza Seif; Mohammad Hafezi; Christopher Jarzynski

    The asymmetry in the flow of events that is expressed by the phrase ‘time’s arrow’ traces back to the second law of thermodynamics. In the microscopic regime, fluctuations prevent us from discerning the direction of time’s arrow with certainty. Here, we find that a machine learning algorithm that is trained to infer the direction of time’s arrow identifies entropy production as the relevant physical

    更新日期:2020-09-21
  • Observation of energy-resolved many-body localization
    Nat. Phys. (IF 19.256) Pub Date : 2020-09-21
    Qiujiang Guo; Chen Cheng; Zheng-Hang Sun; Zixuan Song; Hekang Li; Zhen Wang; Wenhui Ren; Hang Dong; Dongning Zheng; Yu-Ran Zhang; Rubem Mondaini; Heng Fan; H. Wang

    Many-body localization (MBL) describes a quantum phase where an isolated interacting system subject to sufficient disorder displays non-ergodic behaviour, evading thermal equilibrium that occurs under its own dynamics. Previously, the thermalization–MBL transition has been largely characterized with the growth of disorder. Here, we explore a new axis, reporting on an energy-resolved MBL transition

    更新日期:2020-09-21
  • Morphology selection kinetics of crystallization in a sphere
    Nat. Phys. (IF 19.256) Pub Date : 2020-09-21
    Yanshuang Chen; Zhenwei Yao; Shixiang Tang; Hua Tong; Taiki Yanagishima; Hajime Tanaka; Peng Tan

    Crystallization under geometrical confinement is of fundamental importance in condensed matter physics, biophysics and material science. Even the influence of the simplest geometry, a sphere, on crystallization remains far from well understood, thereby making morphology control of the final superstructures challenging. Here, we employ charged colloids encapsulated in an emulsion droplet as a model

    更新日期:2020-09-21
  • Time–information uncertainty relations in thermodynamics
    Nat. Phys. (IF 19.256) Pub Date : 2020-09-21
    Schuyler B. Nicholson; Luis Pedro García-Pintos; Adolfo del Campo; Jason R. Green

    Physical systems powering motion and creating structure in a fixed amount of time dissipate energy and produce entropy. Whether living, synthetic or engineered, systems performing these dynamic functions must balance dissipation and speed. Here, we show that rates of energy and entropy exchange are subject to a speed limit—a time–information uncertainty relation—imposed by the rates of change in the

    更新日期:2020-09-21
  • Generalized superradiance for producing broadband coherent radiation with transversely modulated arbitrarily diluted bunches
    Nat. Phys. (IF 19.256) Pub Date : 2020-09-14
    J. Vieira; M. Pardal; J. T. Mendonça; R. A. Fonseca

    Superradiance is the anomalous radiance describing coherent photon emission from a gas. It plays a crucial role in atomic physics, quantum mechanics and astrophysics. Because the intensity of superradiant light beams is proportional to the number of particles squared, superradiance is also at the core of today’s most powerful light sources. Superradiant emission is intuitively expected when the distance

    更新日期:2020-09-14
  • Weak-to-strong transition of quantum measurement in a trapped-ion system
    Nat. Phys. (IF 19.256) Pub Date : 2020-09-14
    Yiming Pan; Jie Zhang; Eliahu Cohen; Chun-wang Wu; Ping-Xing Chen; Nir Davidson

    Quantum measurement remains a puzzle through its stormy history from the birth of quantum mechanics to state-of-the-art quantum technologies. Two complementary measurement schemes have been widely investigated in a variety of quantum systems: von Neumann’s projective ‘strong’ measurement and Aharonov’s weak measurement. Here, we report the observation of a weak-to-strong measurement transition in a

    更新日期:2020-09-14
  • Symmetry breaking in twisted double bilayer graphene
    Nat. Phys. (IF 19.256) Pub Date : 2020-09-14
    Minhao He; Yuhao Li; Jiaqi Cai; Yang Liu; K. Watanabe; T. Taniguchi; Xiaodong Xu; Matthew Yankowitz

    The flat bands that appear in some twisted van der Waals heterostructures provide a setting in which strong interactions between electrons lead to a variety of correlated phases1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20. In particular, heterostructures of twisted double bilayer graphene host correlated insulating states that can be tuned by both the twist angle and an external electric field11

    更新日期:2020-09-14
  • Chemotaxis under flow disorder shapes microbial dispersion in porous media
    Nat. Phys. (IF 19.256) Pub Date : 2020-09-14
    Pietro de Anna; Amir A. Pahlavan; Yutaka Yawata; Roman Stocker; Ruben Juanes

    Natural soils are host to a high density1 and diversity2 of microorganisms, and even deep-earth porous rocks provide a habitat for active microbial communities3. In these environments, microbial transport by disordered flows is relevant for a broad range of natural and engineered processes, from biochemical cycling to remineralization and bioremediation4,5,6,7. Yet, how bacteria are transported and

    更新日期:2020-09-14
  • A massive test
    Nat. Phys. (IF 19.256) Pub Date : 2020-09-07
    M. S. Kim

    Although quantum mechanics is essential to understand microscopic systems, it has little effect on heavier objects. Experiments have now put strict constraints on theories that use gravity to explain the absence of large-scale quantum effects.

    更新日期:2020-09-08
  • Underground test of gravity-related wave function collapse
    Nat. Phys. (IF 19.256) Pub Date : 2020-09-07
    Sandro Donadi; Kristian Piscicchia; Catalina Curceanu; Lajos Diósi; Matthias Laubenstein; Angelo Bassi

    Roger Penrose proposed that a spatial quantum superposition collapses as a back-reaction from spacetime, which is curved in different ways by each branch of the superposition. In this sense, one speaks of gravity-related wave function collapse. He also provided a heuristic formula to compute the decay time of the superposition—similar to that suggested earlier by Lajos Diósi, hence the name Diósi–Penrose

    更新日期:2020-09-08
  • Black metal hydrogen above 360 GPa driven by proton quantum fluctuations
    Nat. Phys. (IF 19.256) Pub Date : 2020-09-07
    Lorenzo Monacelli; Ion Errea; Matteo Calandra; Francesco Mauri

    Hydrogen metallization under stable conditions is a substantial step towards the realization of the first room-temperature superconductor. Recent low-temperature experiments1,2,3 report different metallization pressures, ranging from 360 GPa to 490 GPa. In this work, we simulate the structural properties and vibrational Raman, infrared and optical spectra of hydrogen phase III, accounting for proton

    更新日期:2020-09-08
  • Structure determines where crystallization occurs in a soft colloidal glass
    Nat. Phys. (IF 19.256) Pub Date : 2020-09-07
    Divya Ganapathi; Dibyashree Chakrabarti; A. K. Sood; Rajesh Ganapathy

    Glass is inherently unstable to crystallization. However, how this transformation occurs while the dynamics in the glass stay frozen at the particle scale is poorly understood. Here, through single-particle-resolved imaging experiments, we show that due to frozen-in density inhomogeneities, a soft colloidal glass crystallizes via two distinct pathways. In the poorly packed regions of the glass, crystallinity

    更新日期:2020-09-08
  • Zero-bias peaks at zero magnetic field in ferromagnetic hybrid nanowires
    Nat. Phys. (IF 19.256) Pub Date : 2020-09-07
    S. Vaitiekėnas; Y. Liu; P. Krogstrup; C. M. Marcus

    Hybrid quantum materials allow for quantum phases that otherwise do not exist in nature1,2. For example, a one-dimensional topological superconductor with Majorana states bound to its ends can be realized by coupling a semiconductor nanowire to a superconductor in the presence of a strong magnetic field3,4,5. However, the applied magnetic fields are detrimental to superconductivity, and constrain device

    更新日期:2020-09-08
  • Braided anyons
    Nat. Phys. (IF 19.256) Pub Date : 2020-09-03
    Rui-Rui Du

    The properties of anyons — two-dimensional particles that are neither fermions nor bosons — have been directly measured in a quantum Hall interferometer.

    更新日期:2020-09-03
  • Direct observation of anyonic braiding statistics
    Nat. Phys. (IF 19.256) Pub Date : 2020-09-03
    J. Nakamura; S. Liang; G. C. Gardner; M. J. Manfra

    Anyons are quasiparticles that, unlike fermions and bosons, show fractional statistics when two of them are exchanged. Here, we report the experimental observation of anyonic braiding statistics for the ν = 1/3 fractional quantum Hall state by using an electronic Fabry–Perot interferometer. Strong Aharonov–Bohm interference of the edge mode is punctuated by discrete phase slips that indicate an anyonic

    更新日期:2020-09-03
  • Braiding photonic topological zero modes
    Nat. Phys. (IF 19.256) Pub Date : 2020-09-03
    Jiho Noh; Thomas Schuster; Thomas Iadecola; Sheng Huang; Mohan Wang; Kevin P. Chen; Claudio Chamon; Mikael C. Rechtsman

    A remarkable property of quantum mechanics in two-dimensional space is its ability to support ‘anyons’, particles that are neither fermions nor bosons. Theory predicts that these exotic excitations can exist as bound states confined near topological defects, such as Majorana zero modes trapped in vortices in topological superconductors. Intriguingly, in the simplest cases the non-trivial phase that

    更新日期:2020-09-03
  • Just a moment
    Nat. Phys. (IF 19.256) Pub Date : 2020-09-03
    Davide Castelvecchi

    Wolfgang Pauli introduced the Bohr magneton as a fundamental unit of magnetic moment during an effort to find a quantum basis for magnetism, as Davide Castelvecchi recounts.

    更新日期:2020-09-03
  • Inside ITER
    Nat. Phys. (IF 19.256) Pub Date : 2020-08-31
    Stefanie Reichert

    The First Plasma discharge in the ITER tokamak is expected for 2025 with deuterium–tritium plasma operation ten years later. We spoke with ITER’s Director-General, Bernard Bigot, and Tim Luce, head of ITER’s Science & Operations Department, about the current status of the project and potential future directions in fusion research.

    更新日期:2020-08-31
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