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Polarization out of the vortex Nat. Phys. (IF 19.256) Pub Date : 2021-03-04 David J. Masiello
The virtual photons that are exchanged when a free-electron vortex beam interacts with a nanoscopic target unlock an explicit connection between polarized optical spectroscopy and the inelastic scattering of scalar electron waves.
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Optical polarization analogue in free electron beams Nat. Phys. (IF 19.256) Pub Date : 2021-03-04 Hugo Lourenço-Martins; Davy Gérard; Mathieu Kociak
Spectromicroscopy techniques with fast electrons can quantitatively measure the optical response of excitations with unrivalled spatial resolution. However, owing to their inherently scalar nature, electron waves cannot access the polarization-related quantities. Despite promising attempts based on the conversion of concepts originating from singular optics (such as vortex beams), the definition of
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Split superconducting and time-reversal symmetry-breaking transitions in Sr 2 RuO 4 under stress Nat. Phys. (IF 19.256) Pub Date : 2021-03-04 Vadim Grinenko; Shreenanda Ghosh; Rajib Sarkar; Jean-Christophe Orain; Artem Nikitin; Matthias Elender; Debarchan Das; Zurab Guguchia; Felix Brückner; Mark E. Barber; Joonbum Park; Naoki Kikugawa; Dmitry A. Sokolov; Jake S. Bobowski; Takuto Miyoshi; Yoshiteru Maeno; Andrew P. Mackenzie; Hubertus Luetkens; Clifford W. Hicks; Hans-Henning Klauss
Strontium ruthenate (Sr2RuO4) continues to present an important test of our understanding of unconventional superconductivity, because while its normal-state electronic structure is known with precision, its superconductivity remains unexplained. There is evidence that its order parameter is chiral, but reconciling this with recent observations of the spin part of the pairing requires an order parameter
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Publisher Correction: Nanoscale mechanics of antiferromagnetic domain walls Nat. Phys. (IF 19.256) Pub Date : 2021-03-02 Natascha Hedrich; Kai Wagner; Oleksandr V. Pylypovskyi; Brendan J. Shields; Tobias Kosub; Denis D. Sheka; Denys Makarov; Patrick Maletinsky
A Correction to this paper has been published: https://doi.org/10.1038/s41567-021-01205-3.
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Symmetry-broken Chern insulators and Rashba-like Landau-level crossings in magic-angle bilayer graphene Nat. Phys. (IF 19.256) Pub Date : 2021-03-01 Ipsita Das; Xiaobo Lu; Jonah Herzog-Arbeitman; Zhi-Da Song; Kenji Watanabe; Takashi Taniguchi; B. Andrei Bernevig; Dmitri K. Efetov
Flat bands in magic-angle twisted bilayer graphene (MATBG) have recently emerged as a rich platform to explore strong correlations1, superconductivity2,3,4,5 and magnetism3,6,7. However, the phases of MATBG in a magnetic field and what they reveal about the zero-field phase diagram remain relatively uncharted. Here we report a rich sequence of wedge-like regions of quantized Hall conductance with Chern
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Multitudes of twists Nat. Phys. (IF 19.256) Pub Date : 2021-02-25 Ren-Min Ma
Multiplexing increases the capacity of optical communication, but it is limited by the number of modes and their orbital angular momentum. A robust vortex laser now solves this problem by emitting several beams, all carrying large topological charges.
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Forward thinking on backward tracing Nat. Phys. (IF 19.256) Pub Date : 2021-02-25 Johannes Müller; Mirjam Kretzschmar
SARS, MERS and now SARS-CoV-2 are unlikely to be the last emerging infections we face during our lifetimes. Tracing contacts both forward and backward through our heterogeneous populations will prove essential to future response strategies.
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Photonic quantum Hall effect and multiplexed light sources of large orbital angular momenta Nat. Phys. (IF 19.256) Pub Date : 2021-02-25 Babak Bahari; Liyi Hsu; Si Hui Pan; Daryl Preece; Abdoulaye Ndao; Abdelkrim El Amili; Yeshaiahu Fainman; Boubacar Kanté
The quantum Hall effect involves electrons confined to a two-dimensional plane subject to a perpendicular magnetic field, but it also has a photonic analogue1,2,3,4,5,6. Using heterostructures based on structured semiconductors on a magnetic substrate, we introduce compact and integrated coherent light sources of large orbital angular momenta7 based on the photonic quantum Hall effect1,2,3,4,5,6. The
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Non-equilibrium quantum dynamics and formation of the Bose polaron Nat. Phys. (IF 19.256) Pub Date : 2021-02-25 Magnus G. Skou; Thomas G. Skov; Nils B. Jørgensen; Kristian K. Nielsen; Arturo Camacho-Guardian; Thomas Pohl; Georg M. Bruun; Jan J. Arlt
Advancing our understanding of non-equilibrium phenomena in quantum many-body systems remains one of the greatest challenges in physics. Here we report on the experimental observation of a paradigmatic many-body problem, namely the non-equilibrium dynamics of a quantum impurity immersed in a bosonic environment1,2. We use an interferometric technique to prepare coherent superposition states of atoms
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The effectiveness of backward contact tracing in networks Nat. Phys. (IF 19.256) Pub Date : 2021-02-25 Sadamori Kojaku; Laurent Hébert-Dufresne; Enys Mones; Sune Lehmann; Yong-Yeol Ahn
Effective control of an epidemic relies on the rapid discovery and isolation of infected individuals. Because many infectious diseases spread through interaction, contact tracing is widely used to facilitate case discovery and control. However, what determines the efficacy of contact tracing has not been fully understood. Here we reveal that, compared with ‘forward’ tracing (tracing to whom disease
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Gain-induced topological response via tailored long-range interactions Nat. Phys. (IF 19.256) Pub Date : 2021-02-25 Yuzhou G. N. Liu; Pawel S. Jung; Midya Parto; Demetrios N. Christodoulides; Mercedeh Khajavikhan
The ability to tailor the hopping interactions between the constituent elements of a physical system could enable the observation of unusual phenomena that are otherwise inaccessible in standard settings1,2. In this regard, a number of recent theoretical studies have indicated that an asymmetry in either the short- or long-range complex exchange constants can lead to counterintuitive effects, for example
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Publisher Correction: Charge radii of exotic potassium isotopes challenge nuclear theory and the magic character of N = 32 Nat. Phys. (IF 19.256) Pub Date : 2021-02-24 Á. Koszorús; X. F. Yang; W. G. Jiang; S. J. Novario; S. W. Bai; J. Billowes; C. L. Binnersley; M. L. Bissell; T. E. Cocolios; B. S. Cooper; R. P. de Groote; A. Ekström; K. T. Flanagan; C. Forssén; S. Franchoo; R. F. Garcia Ruiz; F. P. Gustafsson; G. Hagen; G. R. Jansen; A. Kanellakopoulos; M. Kortelainen; W. Nazarewicz; G. Neyens; T. Papenbrock; P.-G. Reinhard; C. M. Ricketts; B. K. Sahoo; A. R. Vernon;
A Correction to this paper has been published: https://doi.org/10.1038/s41567-021-01192-5.
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Proton–electron mass ratio by high-resolution optical spectroscopy of ion ensembles in the resolved-carrier regime Nat. Phys. (IF 19.256) Pub Date : 2021-02-18 I. V. Kortunov; S. Alighanbari; M. G. Hansen; G. S. Giri; V. I. Korobov; S. Schiller
Optical spectroscopy in the gas phase is a key tool for elucidating the structure of atoms and molecules and their interaction with external fields. The line resolution is usually limited by a combination of first-order Doppler broadening due to particle thermal motion and a short transit time through the excitation beam. For trapped particles, suitable laser cooling techniques can lead to strong confinement
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Tunable van Hove singularities and correlated states in twisted monolayer–bilayer graphene Nat. Phys. (IF 19.256) Pub Date : 2021-02-18 Shuigang Xu; Mohammed M. Al Ezzi; Nilanthy Balakrishnan; Aitor Garcia-Ruiz; Bonnie Tsim; Ciaran Mullan; Julien Barrier; Na Xin; Benjamin A. Piot; Takashi Taniguchi; Kenji Watanabe; Alexandra Carvalho; Artem Mishchenko; A. K. Geim; Vladimir I. Fal’ko; Shaffique Adam; Antonio Helio Castro Neto; Kostya S. Novoselov; Yanmeng Shi
Understanding and tuning correlated states is of great interest and importance to modern condensed-matter physics. The recent discovery of unconventional superconductivity and Mott-like insulating states in magic-angle twisted bilayer graphene presents a unique platform to study correlation phenomena, in which the Coulomb energy dominates over the quenched kinetic energy as a result of hybridized flat
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Topological limits to the parallel processing capability of network architectures Nat. Phys. (IF 19.256) Pub Date : 2021-02-18 Giovanni Petri; Sebastian Musslick; Biswadip Dey; Kayhan Özcimder; David Turner; Nesreen K. Ahmed; Theodeore L. Willke; Jonathan D. Cohen
The ability to learn new tasks and generalize to others is a remarkable characteristic of both human brains and recent artificial intelligence systems. The ability to perform multiple tasks simultaneously is also a key characteristic of parallel architectures, as is evident in the human brain and exploited in traditional parallel architectures. Here we show that these two characteristics reflect a
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Sensitive spin seeks single magnon Nat. Phys. (IF 19.256) Pub Date : 2021-02-15 Paul Hilaire; Sophia E. Economou
A quantum dot has been used to detect a single excitation among the tens of thousands of atomic nuclear spins comprising it. This result is an important step towards treating nuclear spins as a quantum memory rather than a troublesome source of noise.
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Low-divergence femtosecond X-ray pulses from a passive plasma lens Nat. Phys. (IF 19.256) Pub Date : 2021-02-15 Jonas Björklund Svensson; Diego Guénot; Julien Ferri; Henrik Ekerfelt; Isabel Gallardo González; Anders Persson; Kristoffer Svendsen; László Veisz; Olle Lundh
Electron and X-ray beams originating from compact laser-wakefield accelerators have very small source sizes that are typically on the micrometre scale. Therefore, the beam divergences are relatively high, which makes it difficult to preserve their high quality during transport to applications. To improve on this, tremendous efforts have been invested in controlling the divergence of the electron beams
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Emergent nonlinear phenomena in a driven dissipative photonic dimer Nat. Phys. (IF 19.256) Pub Date : 2021-02-15 A. Tikan; J. Riemensberger; K. Komagata; S. Hönl; M. Churaev; C. Skehan; H. Guo; R. N. Wang; J. Liu; P. Seidler; T. J. Kippenberg
Collective effects leading to spatial, temporal or spatiotemporal pattern formation in complex nonlinear systems driven out of equilibrium cannot be described at the single-particle level and are therefore often called emergent phenomena. They are characterized by length scales exceeding the characteristic interaction length and by spontaneous symmetry breaking. Recent advances in integrated photonics
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Correlated insulating states at fractional fillings of the WS 2 /WSe 2 moiré lattice Nat. Phys. (IF 19.256) Pub Date : 2021-02-15 Xiong Huang; Tianmeng Wang; Shengnan Miao; Chong Wang; Zhipeng Li; Zhen Lian; Takashi Taniguchi; Kenji Watanabe; Satoshi Okamoto; Di Xiao; Su-Fei Shi; Yong-Tao Cui
The strong electron interactions in the minibands formed in moiré superlattices of van der Waals materials, such as twisted graphene and transition metal dichalcogenides, make such systems a fascinating platform with which to study strongly correlated states1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19. In most systems, the correlated states appear when the moiré lattice is filled by an integer number
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Quantum sensing of a coherent single spin excitation in a nuclear ensemble Nat. Phys. (IF 19.256) Pub Date : 2021-02-15 D. M. Jackson; D. A. Gangloff; J. H. Bodey; L. Zaporski; C. Bachorz; E. Clarke; M. Hugues; C. Le Gall; M. Atatüre
Accessing an ensemble of coherently interacting objects at the level of single quanta via a proxy qubit is transformative in the investigations of emergent quantum phenomena. An isolated nuclear spin ensemble is a remarkable platform owing to its coherence, but sensing its excitations with single spin precision has remained elusive. Here we achieve quantum sensing of a single nuclear-spin excitation
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Nanoscale mechanics of antiferromagnetic domain walls Nat. Phys. (IF 19.256) Pub Date : 2021-02-15 Natascha Hedrich; Kai Wagner; Oleksandr V. Pylypovskyi; Brendan J. Shields; Tobias Kosub; Denis D. Sheka; Denys Makarov; Patrick Maletinsky
Antiferromagnets can encode information in their ordered magnetic structure, providing the basis for future spintronic devices1,2,3. The control and understanding of antiferromagnetic domain walls, which are the interfaces between domains with differing order parameter orientations, are key ingredients for advancing antiferromagnetic spintronic technologies. However, studies of the intrinsic mechanics
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A hierarchy of protein patterns robustly decodes cell shape information Nat. Phys. (IF 19.256) Pub Date : 2021-02-15 Manon C. Wigbers; Tzer Han Tan; Fridtjof Brauns; Jinghui Liu; S. Zachary Swartz; Erwin Frey; Nikta Fakhri
Many cellular processes, such as cell division1,2,3, cell motility4, wound healing5 and tissue folding6,7, rely on the precise positioning of proteins on the membrane. Such protein patterns emerge from a combination of protein interactions, transport, conformational state changes and chemical reactions at the molecular level8. Recent experimental and theoretical work clearly demonstrates the role of
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Deep moiré potentials in twisted transition metal dichalcogenide bilayers Nat. Phys. (IF 19.256) Pub Date : 2021-02-15 Sara Shabani; Dorri Halbertal; Wenjing Wu; Mingxing Chen; Song Liu; James Hone; Wang Yao; D. N. Basov; Xiaoyang Zhu; Abhay N. Pasupathy
In twisted bilayers of semiconducting transition metal dichalcogenides, a combination of structural rippling and electronic coupling gives rise to periodic moiré potentials that can confine charged and neutral excitations1,2,3,4,5. Here we show that the moiré potential in these bilayers at small angles is unexpectedly large, reaching values above 300 meV for the valence band and 150 meV for the conduction
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Predictably random Nat. Phys. (IF 19.256) Pub Date : 2021-02-11 Paul Skrzypczyk
Two experiments using entangled photons have successfully generated more randomness than consumed — at a level of security that is all but certain. They did so by exploiting non-locality, one of the most counterintuitive aspects of quantum mechanics.
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Probing bulk topological invariants using leaky photonic lattices Nat. Phys. (IF 19.256) Pub Date : 2021-02-11 Daniel Leykam; Daria A. Smirnova
Topological invariants characterizing filled Bloch bands underpin electronic topological insulators and analogous artificial lattices for Bose–Einstein condensates, photonics and acoustic waves. In bosonic systems, there is no Fermi exclusion principle to enforce uniform band filling, which makes measuring their bulk topological invariants challenging. Here we show how to achieve the controllable filling
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Device-independent randomness expansion against quantum side information Nat. Phys. (IF 19.256) Pub Date : 2021-02-11 Wen-Zhao Liu; Ming-Han Li; Sammy Ragy; Si-Ran Zhao; Bing Bai; Yang Liu; Peter J. Brown; Jun Zhang; Roger Colbeck; Jingyun Fan; Qiang Zhang; Jian-Wei Pan
The ability to produce random numbers that are unknown to any outside party is crucial for many applications. Device-independent randomness generation1,2,3,4 does not require trusted devices and therefore provides strong guarantees of the security of the output, but it comes at the price of requiring the violation of a Bell inequality for implementation. A further challenge is to make the bounds in
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A self-correcting qubit Nat. Phys. (IF 19.256) Pub Date : 2021-02-10 Joshua Combes
The unavoidable effects of noise make quantum error correction necessary to realize the full potential of quantum computers. Devices that correct errors autonomously can avoid the computational and hardware overheads of traditional approaches.
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Political union through science Nat. Phys. (IF 19.256) Pub Date : 2021-02-08 Martin J. T. Milton
The metric system is one of the enduring achievements of the French Revolution. Martin Milton recounts how it was also intended to unite nations.
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Biden time Nat. Phys. (IF 19.256) Pub Date : 2021-02-08
Unlike their predecessors in the White House, Joe Biden and Kamala Harris are placing research and development at the centre of their policy agenda. This change was as sorely needed as it is welcome, but the stakes for the new US administration remain high.
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Stay just a little bit longer Nat. Phys. (IF 19.256) Pub Date : 2021-02-04 Anshul Kogar
The short lifetime of light-induced superconductivity prevents the measurement of its transport properties. Encouraging this state to stay a little longer in K3C60 allows the observation of vanishing electrical resistance.
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Work with what you’ve got Nat. Phys. (IF 19.256) Pub Date : 2021-02-04 Boaz Barak
Quantum computing combines great promise with daunting challenges — the road to devices that solve real-world problems is still long. Now, an implementation of a quantum algorithm maps the problems we want to solve to the devices we already have.
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Quantum approximate optimization of non-planar graph problems on a planar superconducting processor Nat. Phys. (IF 19.256) Pub Date : 2021-02-04 Matthew P. Harrigan; Kevin J. Sung; Matthew Neeley; Kevin J. Satzinger; Frank Arute; Kunal Arya; Juan Atalaya; Joseph C. Bardin; Rami Barends; Sergio Boixo; Michael Broughton; Bob B. Buckley; David A. Buell; Brian Burkett; Nicholas Bushnell; Yu Chen; Zijun Chen; Ben Chiaro; Roberto Collins; William Courtney; Sean Demura; Andrew Dunsworth; Daniel Eppens; Austin Fowler; Brooks Foxen; Craig Gidney; Marissa
Faster algorithms for combinatorial optimization could prove transformative for diverse areas such as logistics, finance and machine learning. Accordingly, the possibility of quantum enhanced optimization has driven much interest in quantum technologies. Here we demonstrate the application of the Google Sycamore superconducting qubit quantum processor to combinatorial optimization problems with the
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Polarization entanglement-enabled quantum holography Nat. Phys. (IF 19.256) Pub Date : 2021-02-04 Hugo Defienne; Bienvenu Ndagano; Ashley Lyons; Daniele Faccio
Holography is a cornerstone characterization and imaging technique that can be applied to the full electromagnetic spectrum, from X-rays to radio waves or even particles such as neutrons. The key property in all these holographic approaches is coherence, which is required to extract the phase information through interference with a reference beam. Without this, holography is not possible. Here we introduce
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High-temperature topological superconductivity in twisted double-layer copper oxides Nat. Phys. (IF 19.256) Pub Date : 2021-02-04 Oguzhan Can; Tarun Tummuru; Ryan P. Day; Ilya Elfimov; Andrea Damascelli; Marcel Franz
Various phenomena occur when two-dimensional materials, such as graphene or transition metal dichalcogenides, are assembled into bilayers with a twist between the individual layers. As an application of this paradigm, we predict that structures composed of two-monolayer-thin d-wave superconductors with a twist angle form a robust, fully gapped topological phase with spontaneously broken time-reversal
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Evidence for metastable photo-induced superconductivity in K 3 C 60 Nat. Phys. (IF 19.256) Pub Date : 2021-02-04 M. Budden; T. Gebert; M. Buzzi; G. Jotzu; E. Wang; T. Matsuyama; G. Meier; Y. Laplace; D. Pontiroli; M. Riccò; F. Schlawin; D. Jaksch; A. Cavalleri
Excitation of high-Tc cuprates and certain organic superconductors with intense far-infrared optical pulses has been shown to create non-equilibrium states with optical properties that are consistent with transient high-temperature superconductivity. These non-equilibrium phases have been generated using femtosecond drives, and have been observed to disappear immediately after excitation, which is
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Moiré heterostructures as a condensed-matter quantum simulator Nat. Phys. (IF 19.256) Pub Date : 2021-02-01 Dante M. Kennes; Martin Claassen; Lede Xian; Antoine Georges; Andrew J. Millis; James Hone; Cory R. Dean; D. N. Basov; Abhay N. Pasupathy; Angel Rubio
Twisted van der Waals heterostructures have latterly received prominent attention for their many remarkable experimental properties and the promise that they hold for realizing elusive states of matter in the laboratory. We propose that these systems can, in fact, be used as a robust quantum simulation platform that enables the study of strongly correlated physics and topology in quantum materials
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Publisher Correction: Bacteria solve the problem of crowding by moving slowly Nat. Phys. (IF 19.256) Pub Date : 2021-01-28 O. J. Meacock; A. Doostmohammadi; K. R. Foster; J. M. Yeomans; W. M. Durham
A Correction to this paper has been published: https://doi.org/10.1038/s41567-021-01181-8.
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The life of an analogue black hole Nat. Phys. (IF 19.256) Pub Date : 2021-01-28 Giovanni Modugno
Table-top superfluid experiments offer a way of bringing the physics of astrophysical black holes into the lab. But the presence of two event horizons in these superfluid black holes complicates matters — and makes them more interesting.
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The case of the exotic isotopes Nat. Phys. (IF 19.256) Pub Date : 2021-01-28 Gianluca Colò
With increasing neutron number, the size of a nucleus grows, subject to subtle effects that act as fingerprints of its internal structure. A fresh look at potassium calls for theory to decipher the details.
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Muon colliders to expand frontiers of particle physics Nat. Phys. (IF 19.256) Pub Date : 2021-01-28 K. R. Long; D. Lucchesi; M. A. Palmer; N. Pastrone; D. Schulte; V. Shiltsev
Muon colliders offer enormous potential for the exploration of the particle physics frontier but are challenging to realize. A new international collaboration is forming to make such a muon collider a reality.
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Device-independent randomness expansion with entangled photons Nat. Phys. (IF 19.256) Pub Date : 2021-01-28 Lynden K. Shalm; Yanbao Zhang; Joshua C. Bienfang; Collin Schlager; Martin J. Stevens; Michael D. Mazurek; Carlos Abellán; Waldimar Amaya; Morgan W. Mitchell; Mohammad A. Alhejji; Honghao Fu; Joel Ornstein; Richard P. Mirin; Sae Woo Nam; Emanuel Knill
With the growing availability of experimental loophole-free Bell tests1,2,3,4,5, it has become possible to implement a new class of device-independent random number generators whose output can be certified6,7 to be uniformly random without requiring a detailed model of the quantum devices used8,9,10. However, all these experiments require many input bits to certify a small number of output bits, and
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A hydrodynamic instability drives protein droplet formation on microtubules to nucleate branches Nat. Phys. (IF 19.256) Pub Date : 2021-01-28 Sagar U. Setru; Bernardo Gouveia; Raymundo Alfaro-Aco; Joshua W. Shaevitz; Howard A. Stone; Sabine Petry
Liquid–liquid phase separation1,2 occurs not only in bulk liquid, but also on surfaces. In physiology, the nature and function of condensates on cellular structures remain unexplored. Here we study how the condensed protein TPX2 behaves on microtubules to initiate branching microtubule nucleation3,4,5, which is critical for spindle assembly in eukaryotic cells6,7,8,9,10. Using fluorescence, electron
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Charge radii of exotic potassium isotopes challenge nuclear theory and the magic character of N = 32 Nat. Phys. (IF 19.256) Pub Date : 2021-01-28 Á. Koszorús; X. F. Yang; W. G. Jiang; S. J. Novario; S. W. Bai; J. Billowes; C. L. Binnersley; M. L. Bissell; T. E. Cocolios; B. S. Cooper; R. P. de Groote; A. Ekström; K. T. Flanagan; C. Forssén; S. Franchoo; R. F. Garcia Ruiz; F. P. Gustafsson; G. Hagen; G. R. Jansen; A. Kanellakopoulos; M. Kortelainen; W. Nazarewicz; G. Neyens; T. Papenbrock; P.-G. Reinhard; C. M. Ricketts; B. K. Sahoo; A. R. Vernon;
Nuclear charge radii are sensitive probes of different aspects of the nucleon–nucleon interaction and the bulk properties of nuclear matter, providing a stringent test and challenge for nuclear theory. Experimental evidence suggested a new magic neutron number at N = 32 (refs. 1,2,3) in the calcium region, whereas the unexpectedly large increases in the charge radii4,5 open new questions about the
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Publisher Correction: Enhanced thermal Hall effect in the square-lattice Néel state Nat. Phys. (IF 19.256) Pub Date : 2021-01-26 Rhine Samajdar; Mathias S. Scheurer; Shubhayu Chatterjee; Haoyu Guo; Cenke Xu; Subir Sachdev
A Correction to this paper has been published: https://doi.org/10.1038/s41567-021-01180-9.
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Got the quantum jitters Nat. Phys. (IF 19.256) Pub Date : 2021-01-25 Miro Erkintalo
Among the many reasons a signal may deviate from perfect periodicity, quantum-limited jitter is arguably the most fundamental. A clever experiment has now stripped away technical noise to unveil quantum-limited jitter of ultrafast soliton frequency combs.
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Quantum diffusion of microcavity solitons Nat. Phys. (IF 19.256) Pub Date : 2021-01-25 Chengying Bao; Myoung-Gyun Suh; Boqiang Shen; Kemal Şafak; Anan Dai; Heming Wang; Lue Wu; Zhiquan Yuan; Qi-Fan Yang; Andrey B. Matsko; Franz X. Kärtner; Kerry J. Vahala
Coherently pumped (Kerr) solitons in an ideal optical microcavity are expected to undergo random quantum motion that determines fundamental performance limits in applications of the soliton microcombs1. Here this random walk and its impact on Kerr soliton timing jitter are studied experimentally. The quantum limit is discerned by measuring the relative position of counter-propagating solitons2. Their
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Publisher Correction: Resonant phase-matching between a light wave and a free-electron wavefunction Nat. Phys. (IF 19.256) Pub Date : 2021-01-22 Raphael Dahan; Saar Nehemia; Michael Shentcis; Ori Reinhardt; Yuval Adiv; Xihang Shi; Orr Be’er; Morgan H. Lynch; Yaniv Kurman; Kangpeng Wang; Ido Kaminer
A Correction to this paper has been published: https://doi.org/10.1038/s41567-021-01178-3.
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Disordered exchange is biased Nat. Phys. (IF 19.256) Pub Date : 2021-01-21 Minhyea Lee
The magnetic properties of intercalated metal dichalcogenides are dramatically affected by small crystal imperfections, potentially providing design principles and materials for spintronic devices.
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Maximum information states for coherent scattering measurements Nat. Phys. (IF 19.256) Pub Date : 2021-01-21 Dorian Bouchet; Stefan Rotter; Allard P. Mosk
The use of coherent light for precision measurements has been a key driving force for numerous research directions, ranging from biomedical optics1,2 to semiconductor manufacturing3. Recent work demonstrates that the precision of such measurements can be substantially improved by tailoring the spatial profile of light fields used for estimating an observable system parameter4,5,6,7,8,9,10. These advances
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Exchange bias due to coupling between coexisting antiferromagnetic and spin-glass orders Nat. Phys. (IF 19.256) Pub Date : 2021-01-21 Eran Maniv; Ryan A. Murphy; Shannon C. Haley; Spencer Doyle; Caolan John; Ariel Maniv; Sanath K. Ramakrishna; Yun-Long Tang; Peter Ercius; Ramamoorthy Ramesh; Arneil P. Reyes; Jeffrey R. Long; James G. Analytis
Exchange bias is a property of widespread technological utility, but its underlying mechanism remains elusive, in part because it is rooted in the interaction of coexisting order parameters in the presence of complex magnetic disorder. Here we show that a giant exchange bias housed within a spin-glass phase arises in a disordered antiferromagnet. The magnitude and robustness of the exchange bias emerges
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Publisher Correction: A charge-density-wave topological semimetal Nat. Phys. (IF 19.256) Pub Date : 2021-01-18 Wujun Shi; Benjamin J. Wieder; Holger L. Meyerheim; Yan Sun; Yang Zhang; Yiwei Li; Lei Shen; Yanpeng Qi; Lexian Yang; Jagannath Jena; Peter Werner; Klaus Koepernik; Stuart Parkin; Yulin Chen; Claudia Felser; B. Andrei Bernevig; Zhijun Wang
A Correction to this paper has been published: https://doi.org/10.1038/s41567-021-01169-4 .
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When silicon is like a cuprate Nat. Phys. (IF 19.256) Pub Date : 2021-01-18 Eduardo Miranda
Recent advances in spectroscopy give access to the decay time of excitations in disordered insulating silicon close to the metal–insulator transition, revealing similarities to high-temperature cuprate superconductors.
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Observation of a marginal Fermi glass Nat. Phys. (IF 19.256) Pub Date : 2021-01-18 Fahad Mahmood; Dipanjan Chaudhuri; Sarang Gopalakrishnan; Rahul Nandkishore; N. P. Armitage
A long-standing open problem in condensed-matter physics is whether or not a strongly disordered interacting insulator can be mapped to a system of effectively non-interacting localized excitations. Using terahertz two-dimensional coherent spectroscopy, we investigate this issue in phosphorus-doped silicon, a classic example of a correlated disordered electron system in three dimensions. Despite the
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Decay and recurrence of non-Gaussian correlations in a quantum many-body system Nat. Phys. (IF 19.256) Pub Date : 2021-01-18 Thomas Schweigler; Marek Gluza; Mohammadamin Tajik; Spyros Sotiriadis; Federica Cataldini; Si-Cong Ji; Frederik S. Møller; João Sabino; Bernhard Rauer; Jens Eisert; Jörg Schmiedmayer
Gaussian models provide an excellent effective description of many quantum many-body systems ranging from condensed-matter systems1,2 all the way to neutron stars3. Gaussian states are common at equilibrium when the interactions are weak. Recently it was proposed that they can also emerge dynamically from a non-Gaussian initial state evolving under non-interacting dynamics4,5,6,7,8,9,10,11. Here we
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Motility-induced fracture reveals a ductile-to-brittle crossover in a simple animal’s epithelia Nat. Phys. (IF 19.256) Pub Date : 2021-01-18 Vivek N. Prakash; Matthew S. Bull; Manu Prakash
Epithelial tissues provide an important barrier function in animals, but these tissues are subjected to extreme strains during day-to-day activities such as feeding and locomotion. Understanding tissue mechanics and the adaptive response in dynamic force landscapes remains an important area of research. Here we carry out a multi-modal study of a simple yet highly dynamic organism, Trichoplax adhaerens
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Clocking Auger electrons Nat. Phys. (IF 19.256) Pub Date : 2021-01-18 D. C. Haynes; M. Wurzer; A. Schletter; A. Al-Haddad; C. Blaga; C. Bostedt; J. Bozek; H. Bromberger; M. Bucher; A. Camper; S. Carron; R. Coffee; J. T. Costello; L. F. DiMauro; Y. Ding; K. Ferguson; I. Grguraš; W. Helml; M. C. Hoffmann; M. Ilchen; S. Jalas; N. M. Kabachnik; A. K. Kazansky; R. Kienberger; A. R. Maier; T. Maxwell; T. Mazza; M. Meyer; H. Park; J. Robinson; C. Roedig; H. Schlarb; R. Singla;
Intense X-ray free-electron lasers (XFELs) can rapidly excite matter, leaving it in inherently unstable states that decay on femtosecond timescales. The relaxation occurs primarily via Auger emission, so excited-state observations are constrained by Auger decay. In situ measurement of this process is therefore crucial, yet it has thus far remained elusive in XFELs owing to inherent timing and phase
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Shifting computational boundaries for complex organic materials Nat. Phys. (IF 19.256) Pub Date : 2021-01-12 R. Matthias Geilhufe; Bart Olsthoorn; Alexander V. Balatsky
Methodology adapted from data science sparked the field of materials informatics, and materials databases are at the heart of it. Applying artificial intelligence to these databases will allow the prediction of the properties of complex organic crystals.
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Truth and beauty in physics and biology Nat. Phys. (IF 19.256) Pub Date : 2021-01-11 Ben D. MacArthur
Physicists and biologists have different conceptions of beauty. A better appreciation of these differences may bring the disciplines closer and help develop a more integrated view of life.
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Nuclear espionage Nat. Phys. (IF 19.256) Pub Date : 2021-01-11 Alexandra Zidovska
Biophysicists have long sought to probe the physical properties of the cell nucleus, but the sheer size of this tiny organelle puts limits on its exploration. The coarsening of biomolecular droplets looks set to give us the inside scoop.
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Hofstadter subband ferromagnetism and symmetry-broken Chern insulators in twisted bilayer graphene Nat. Phys. (IF 19.256) Pub Date : 2021-01-11 Yu Saito; Jingyuan Ge; Louk Rademaker; Kenji Watanabe; Takashi Taniguchi; Dmitry A. Abanin; Andrea F. Young
When the twist angle between two layers of graphene is approximately 1.1°, interlayer tunnelling and rotational misalignment conspire to create a pair of flat bands1 that are known to host various insulating, superconducting and magnetic states when they are partially filled2,3,4,5,6,7. Most work has focused on the zero-magnetic-field phase diagram, but here we show that twisted bilayer graphene in
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