Volume 117, Issue 9

26 August 2016

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On the Cover

Photographs showing the impact of a solid sphere on (top) a low and (bottom) a high density granular suspension.

From the article:

Unifying Impacts in Granular Matter from Quicksand to Cornstarch
J. John Soundar Jerome, Nicolas Vandenberghe, and Yoël Forterre
Phys. Rev. Lett. 117, 098003 (2016)

HIGHLIGHTED ARTICLES

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Constraints on Cosmology and Gravity from the Dynamics of Voids

Nico Hamaus, Alice Pisani, P. M. Sutter, Guilhem Lavaux, Stéphanie Escoffier, Benjamin D. Wandelt, and Jochen Weller

Phys. Rev. Lett. 117, 091302 (2016) - Published 25 August, 2016

The distribution of galaxies around regions of relatively empty space can be used to constrain cosmological parameters.

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Attosecond Delays in Molecular Photoionization

Martin Huppert, Inga Jordan, Denitsa Baykusheva, Aaron von Conta, and Hans Jakob Wörner

Phys. Rev. Lett. 117, 093001 (2016) - Published 22 August, 2016

Attosecond-resolution experiments have determined the delay in an electron’s emission from a molecule after being ionized with light.

FEATURED IN PHYSICS

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Wave-Based Turing Machine: Time Reversal and Information Erasing

S. Perrard, E. Fort, and Y. Couder

Phys. Rev. Lett. 117, 094502 (2016) - Published 26 August, 2016

A droplet bouncing and wandering across a liquid surface can produce waves that store the history of its chaotic motion.

FEATURED IN PHYSICS

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Commensurability Oscillations of Composite Fermions Induced by the Periodic Potential of a Wigner Crystal

H. Deng, Y. Liu, I. Jo, L. N. Pfeiffer, K. W. West, K. W. Baldwin, and M. Shayegan

Phys. Rev. Lett. 117, 096601 (2016) - Published 23 August, 2016

The lattice symmetry of a quantum Wigner crystal is deduced from its effect on quantized states in a nearby sheet of electrons.

FEATURED IN PHYSICS

Quantifying Interparticle Forces and Heterogeneity in 3D Granular Materials

R. C. Hurley, S. A. Hall, J. E. Andrade, and J. Wright

Phys. Rev. Lett. 117, 098005 (2016) - Published 24 August, 2016

A map of the contact forces between grains in a sand pile provides a first glimpse of how force is distributed in a 3D granular system.

EDITORS' SUGGESTION

Floquet Time Crystals

Dominic V. Else, Bela Bauer, and Chetan Nayak

Phys. Rev. Lett. 117, 090402 (2016) - Published 25 August, 2016

Time-translation symmetry can be spontaneously broken in driven quantum systems opening the door to time crystals, according to new theoretical predictions.

EDITORS' SUGGESTION

Lensing of Fast Radio Bursts as a Probe of Compact Dark Matter

Julian B. Muñoz, Ely D. Kovetz, Liang Dai, and Marc Kamionkowski

Phys. Rev. Lett. 117, 091301 (2016) - Published 24 August, 2016

Gravitational lensing of fast radio bursts around compact dark matter objects larger than twenty solar masses could be detected in upcoming experiments allowing constraints to be placed on the fraction of dark matter they contain.

EDITORS' SUGGESTION

Universal Charge Diffusion and the Butterfly Effect in Holographic Theories

Mike Blake

Phys. Rev. Lett. 117, 091601 (2016) - Published 23 August, 2016

A universal regime describing charge transport in holographic theories with particle-hole symmetry is theoretically predicted, suggesting a link between strongly coupled quantum field theories and quantum chaos.

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Lieb-Robinson Bound and the Butterfly Effect in Quantum Field Theories

Daniel A. Roberts and Brian Swingle

Phys. Rev. Lett. 117, 091602 (2016) - Published 23 August, 2016

EDITORS' SUGGESTION

Core Ionization Initiates Subfemtosecond Charge Migration in the Valence Shell of Molecules

Alexander I. Kuleff, Nikolai V. Kryzhevoi, Markus Pernpointner, and Lorenz S. Cederbaum

Phys. Rev. Lett. 117, 093002 (2016) - Published 23 August, 2016

Attosecond experiments reveal that ionizing a core electron in nitrosobenzene results in a static hole in the core and an intense charge migration in the valence shell.

EDITORS' SUGGESTION

Micrometer-Scale Ballistic Transport of Electron Pairs in ${LaAlO}_{3} / {SrTiO}_{3}$ Nanowires

Michelle Tomczyk, Guanglei Cheng, Hyungwoo Lee, Shicheng Lu, Anil Annadi, Joshua P. Veazey, Mengchen Huang, Patrick Irvin, Sangwoo Ryu, Chang-Beom Eom, and Jeremy Levy

Phys. Rev. Lett. 117, 096801 (2016) - Published 22 August, 2016

Uncondensed spin-singlet electron pairs in a quasi-one-dimensional LaAlO $_{3}$ /SrTiO $_{3}$ nanowire cavity experience micrometer scale ballistic transport.

LETTERS

General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.

Universal Decoherence under Gravity: A Perspective through the Equivalence Principle

Belinda H. Pang, Yanbei Chen, and Farid Ya. Khalili

Phys. Rev. Lett. 117, 090401 (2016) - Published 24 August, 2016

EDITORS' SUGGESTION

Floquet Time Crystals

Dominic V. Else, Bela Bauer, and Chetan Nayak

Phys. Rev. Lett. 117, 090402 (2016) - Published 25 August, 2016

Time-translation symmetry can be spontaneously broken in driven quantum systems opening the door to time crystals, according to new theoretical predictions.

Atmospheric Quantum Channels with Weak and Strong Turbulence

D. Vasylyev, A. A. Semenov, and W. Vogel

Phys. Rev. Lett. 117, 090501 (2016) - Published 23 August, 2016

Optimal Compression for Identically Prepared Qubit States

Yuxiang Yang, Giulio Chiribella, and Masahito Hayashi

Phys. Rev. Lett. 117, 090502 (2016) - Published 25 August, 2016

Gravitation and Astrophysics

Testing General Relativity with Accretion-Flow Imaging of Sgr $A^{*}$

Tim Johannsen, Carlos Wang, Avery E. Broderick, Sheperd S. Doeleman, Vincent L. Fish, Abraham Loeb, and Dimitrios Psaltis

Phys. Rev. Lett. 117, 091101 (2016) - Published 24 August, 2016

Constraining Modified Theories of Gravity with Gravitational-Wave Stochastic Backgrounds

Andrea Maselli, Stefania Marassi, Valeria Ferrari, Kostas Kokkotas, and Raffaella Schneider

Phys. Rev. Lett. 117, 091102 (2016) - Published 25 August, 2016

Antiproton Flux, Antiproton-to-Proton Flux Ratio, and Properties of Elementary Particle Fluxes in Primary Cosmic Rays Measured with the Alpha Magnetic Spectrometer on the International Space Station

M. Aguilar et al. (AMS Collaboration)

Phys. Rev. Lett. 117, 091103 (2016) - Published 26 August, 2016

EDITORS' SUGGESTION

Lensing of Fast Radio Bursts as a Probe of Compact Dark Matter

Julian B. Muñoz, Ely D. Kovetz, Liang Dai, and Marc Kamionkowski

Phys. Rev. Lett. 117, 091301 (2016) - Published 24 August, 2016

FEATURED IN PHYSICS

EDITORS' SUGGESTION

Constraints on Cosmology and Gravity from the Dynamics of Voids

Nico Hamaus, Alice Pisani, P. M. Sutter, Guilhem Lavaux, Stéphanie Escoffier, Benjamin D. Wandelt, and Jochen Weller

Phys. Rev. Lett. 117, 091302 (2016) - Published 25 August, 2016

The distribution of galaxies around regions of relatively empty space can be used to constrain cosmological parameters.

Elementary Particles and Fields

EDITORS' SUGGESTION

Universal Charge Diffusion and the Butterfly Effect in Holographic Theories

Mike Blake

Phys. Rev. Lett. 117, 091601 (2016) - Published 23 August, 2016

EDITORS' SUGGESTION

Lieb-Robinson Bound and the Butterfly Effect in Quantum Field Theories

Daniel A. Roberts and Brian Swingle

Phys. Rev. Lett. 117, 091602 (2016) - Published 23 August, 2016

Nonequilibrium Dynamics and Phase Transitions in Holographic Models

Romuald A. Janik, Jakub Jankowski, and Hesam Soltanpanahi

Phys. Rev. Lett. 117, 091603 (2016) - Published 26 August, 2016

Higgs Doublet Decay as the Origin of the Baryon Asymmetry

Thomas Hambye and Daniele Teresi

Phys. Rev. Lett. 117, 091801 (2016) - Published 25 August, 2016

Supersymmetric Explanation of $C P$ Violation in $K \to π π$ Decays

Teppei Kitahara, Ulrich Nierste, and Paul Tremper

Phys. Rev. Lett. 117, 091802 (2016) - Published 26 August, 2016

Nuclear Physics

Decays of the Three Top Contributors to the Reactor ${\bar{ν}}_{e}$ High-Energy Spectrum, ${}^{92}{Rb}$ , ${}^{96 gs}Y$ , and ${}^{142}{Cs}$ , Studied with Total Absorption Spectroscopy

B. C. Rasco, M. Wolińska-Cichocka, A. Fijałkowska, K. P. Rykaczewski, M. Karny, R. K. Grzywacz, K. C. Goetz, C. J. Gross, D. W. Stracener, E. F. Zganjar, J. C. Batchelder, J. C. Blackmon, N. T. Brewer, S. Go, B. Heffron, T. King, J. T. Matta, K. Miernik, C. D. Nesaraja, S. V. Paulauskas, M. M. Rajabali, E. H. Wang, J. A. Winger, Y. Xiao, and C. J. Zachary

Phys. Rev. Lett. 117, 092501 (2016) - Published 22 August, 2016

Evidence for Gamow-Teller Decay of ${}^{78}{Ni}$ Core from Beta-Delayed Neutron Emission Studies

M. Madurga, S. V. Paulauskas, R. Grzywacz, D. Miller, D. W. Bardayan, J. C. Batchelder, N. T. Brewer, J. A. Cizewski, A. Fijałkowska, C. J. Gross, M. E. Howard, S. V. Ilyushkin, B. Manning, M. Matoš, A. J. Mendez, II, K. Miernik, S. W. Padgett, W. A. Peters, B. C. Rasco, A. Ratkiewicz, K. P. Rykaczewski, D. W. Stracener, E. H. Wang, M. Wolińska-Cichocka, and E. F. Zganjar

Phys. Rev. Lett. 117, 092502 (2016) - Published 23 August, 2016

Atomic, Molecular, and Optical Physics

FEATURED IN PHYSICS

EDITORS' SUGGESTION

Attosecond Delays in Molecular Photoionization

Martin Huppert, Inga Jordan, Denitsa Baykusheva, Aaron von Conta, and Hans Jakob Wörner

Phys. Rev. Lett. 117, 093001 (2016) - Published 22 August, 2016

Attosecond-resolution experiments have determined the delay in an electron’s emission from a molecule after being ionized with light.

EDITORS' SUGGESTION

Core Ionization Initiates Subfemtosecond Charge Migration in the Valence Shell of Molecules

Alexander I. Kuleff, Nikolai V. Kryzhevoi, Markus Pernpointner, and Lorenz S. Cederbaum

Phys. Rev. Lett. 117, 093002 (2016) - Published 23 August, 2016

Attosecond experiments reveal that ionizing a core electron in nitrosobenzene results in a static hole in the core and an intense charge migration in the valence shell.

Enhancing High-Order Harmonic Generation in Light Molecules by Using Chirped Pulses

M. Lara-Astiaso, R. E. F. Silva, A. Gubaydullin, P. Rivière, C. Meier, and F. Martín

Phys. Rev. Lett. 117, 093003 (2016) - Published 24 August, 2016

Extreme-Ultraviolet-Initated High-Order Harmonic Generation: Driving Inner-Valence Electrons Using Below-Threshold-Energy Extreme-Ultraviolet Light

A. C. Brown and H. W. van der Hart

Phys. Rev. Lett. 117, 093201 (2016) - Published 23 August, 2016

Phase Separation and Pair Condensation in a Spin-Imbalanced 2D Fermi Gas

Debayan Mitra, Peter T. Brown, Peter Schauß, Stanimir S. Kondov, and Waseem S. Bakr

Phys. Rev. Lett. 117, 093601 (2016) - Published 24 August, 2016

Nonlinear Dynamics, Fluid Dynamics, Classical Optics, etc.

Spatial Distribution of Phase Singularities in Optical Random Vector Waves

L. De Angelis, F. Alpeggiani, A. Di Falco, and L. Kuipers

Phys. Rev. Lett. 117, 093901 (2016) - Published 23 August, 2016

Probe of Multielectron Dynamics in Xenon by Caustics in High-Order Harmonic Generation

D. Faccialà, S. Pabst, B. D. Bruner, A. G. Ciriolo, S. De Silvestri, M. Devetta, M. Negro, H. Soifer, S. Stagira, N. Dudovich, and C. Vozzi

Phys. Rev. Lett. 117, 093902 (2016) - Published 26 August, 2016

Energy Criterion for the Spectral Stability of Discrete Breathers

Panayotis G. Kevrekidis, Jesús Cuevas-Maraver, and Dmitry E. Pelinovsky

Phys. Rev. Lett. 117, 094101 (2016) - Published 23 August, 2016

Tensile Instability in a Thick Elastic Body

Johannes T. B. Overvelde, David M. J. Dykstra, Rijk de Rooij, James Weaver, and Katia Bertoldi

Phys. Rev. Lett. 117, 094301 (2016) - Published 24 August, 2016

Spreading of Bubbles after Contacting the Lower Side of an Aerophilic Slide Immersed in Water

Hélène de Maleprade, Christophe Clanet, and David Quéré

Phys. Rev. Lett. 117, 094501 (2016) - Published 25 August, 2016

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EDITORS' SUGGESTION

Wave-Based Turing Machine: Time Reversal and Information Erasing

S. Perrard, E. Fort, and Y. Couder

Phys. Rev. Lett. 117, 094502 (2016) - Published 26 August, 2016

A droplet bouncing and wandering across a liquid surface can produce waves that store the history of its chaotic motion.

Plasma and Beam Physics

High-Flux Femtosecond X-Ray Emission from Controlled Generation of Annular Electron Beams in a Laser Wakefield Accelerator

T. Z. Zhao, K. Behm, C. F. Dong, X. Davoine, S. Y. Kalmykov, V. Petrov, V. Chvykov, P. Cummings, B. Hou, A. Maksimchuk, J. A. Nees, V. Yanovsky, A. G. R. Thomas, and K. Krushelnick

Phys. Rev. Lett. 117, 094801 (2016) - Published 24 August, 2016

Laboratory Observation of Resistive Electron Tearing in a Two-Fluid Reconnecting Current Sheet

Jonathan Jara-Almonte, Hantao Ji, Masaaki Yamada, Jongsoo Yoo, and William Fox

Phys. Rev. Lett. 117, 095001 (2016) - Published 25 August, 2016

Explosive Particle Dispersion in Plasma Turbulence

S. Servidio, C. T. Haynes, W. H. Matthaeus, D. Burgess, V. Carbone, and P. Veltri

Phys. Rev. Lett. 117, 095101 (2016) - Published 24 August, 2016

Condensed Matter: Structure, etc.

Observation and Structure Determination of an Oxide Quasicrystal Approximant

S. Förster, M. Trautmann, S. Roy, W. A. Adeagbo, E. M. Zollner, R. Hammer, F. O. Schumann, K. Meinel, S. K. Nayak, K. Mohseni, W. Hergert, H. L. Meyerheim, and W. Widdra

Phys. Rev. Lett. 117, 095501 (2016) - Published 24 August, 2016

Premelting-Induced Smoothening of the Ice-Vapor Interface

Jorge Benet, Pablo Llombart, Eduardo Sanz, and Luis G. MacDowell

Phys. Rev. Lett. 117, 096101 (2016) - Published 24 August, 2016

Condensed Matter: Electronic Properties, etc.

Dirac Node Lines in Pure Alkali Earth Metals

Ronghan Li, Hui Ma, Xiyue Cheng, Shoulong Wang, Dianzhong Li, Zhengyu Zhang, Yiyi Li, and Xing-Qiu Chen

Phys. Rev. Lett. 117, 096401 (2016) - Published 22 August, 2016

Interaction-Driven Spontaneous Quantum Hall Effect on a Kagome Lattice

W. Zhu, Shou-Shu Gong, Tian-Sheng Zeng, Liang Fu, and D. N. Sheng

Phys. Rev. Lett. 117, 096402 (2016) - Published 23 August, 2016

Slowdown of the Electronic Relaxation Close to the Mott Transition

Sharareh Sayyad and Martin Eckstein

Phys. Rev. Lett. 117, 096403 (2016) - Published 24 August, 2016

Filling-Enforced Gaplessness in Band Structures of the 230 Space Groups

Haruki Watanabe, Hoi Chun Po, Michael P. Zaletel, and Ashvin Vishwanath

Phys. Rev. Lett. 117, 096404 (2016) - Published 24 August, 2016

Fermionic Symmetry-Protected Topological Phase in a Two-Dimensional Hubbard Model

Cheng-Chien Chen, Lukas Muechler, Roberto Car, Titus Neupert, and Joseph Maciejko

Phys. Rev. Lett. 117, 096405 (2016) - Published 25 August, 2016

FEATURED IN PHYSICS

EDITORS' SUGGESTION

Commensurability Oscillations of Composite Fermions Induced by the Periodic Potential of a Wigner Crystal

H. Deng, Y. Liu, I. Jo, L. N. Pfeiffer, K. W. West, K. W. Baldwin, and M. Shayegan

Phys. Rev. Lett. 117, 096601 (2016) - Published 23 August, 2016

The lattice symmetry of a quantum Wigner crystal is deduced from its effect on quantized states in a nearby sheet of electrons.

EDITORS' SUGGESTION

Micrometer-Scale Ballistic Transport of Electron Pairs in ${LaAlO}_{3} / {SrTiO}_{3}$ Nanowires

Michelle Tomczyk, Guanglei Cheng, Hyungwoo Lee, Shicheng Lu, Anil Annadi, Joshua P. Veazey, Mengchen Huang, Patrick Irvin, Sangwoo Ryu, Chang-Beom Eom, and Jeremy Levy

Phys. Rev. Lett. 117, 096801 (2016) - Published 22 August, 2016

Uncondensed spin-singlet electron pairs in a quasi-one-dimensional LaAlO $_{3}$ /SrTiO $_{3}$ nanowire cavity experience micrometer scale ballistic transport.

Stabilization of the Particle-Hole Pfaffian Order by Landau-Level Mixing and Impurities That Break Particle-Hole Symmetry

P. T. Zucker and D. E. Feldman

Phys. Rev. Lett. 117, 096802 (2016) - Published 22 August, 2016

Charge $2 e / 3$ Superconductivity and Topological Degeneracies without Localized Zero Modes in Bilayer Fractional Quantum Hall States

Maissam Barkeshli

Phys. Rev. Lett. 117, 096803 (2016) - Published 24 August, 2016

Quantization of Hall Resistance at the Metallic Interface between an Oxide Insulator and ${SrTiO}_{3}$

Felix Trier, Guenevere E. D. K. Prawiroatmodjo, Zhicheng Zhong, Dennis Valbjørn Christensen, Merlin von Soosten, Arghya Bhowmik, Juan Maria García Lastra, Yunzhong Chen, Thomas Sand Jespersen, and Nini Pryds

Phys. Rev. Lett. 117, 096804 (2016) - Published 25 August, 2016

Modifying the Surface of a Rashba-Split Pb-Ag Alloy Using Tailored Metal-Organic Bonds

Benjamin Stadtmüller, Johannes Seidel, Norman Haag, Lisa Grad, Christian Tusche, Gerben van Straaten, Markus Franke, Jürgen Kirschner, Christian Kumpf, Mirko Cinchetti, and Martin Aeschlimann

Phys. Rev. Lett. 117, 096805 (2016) - Published 26 August, 2016

${NaFe}_{0.56} {Cu}_{0.44} As$ : A Pnictide Insulating Phase Induced by On-Site Coulomb Interaction

C. E. Matt, N. Xu, Baiqing Lv, Junzhang Ma, F. Bisti, J. Park, T. Shang, Chongde Cao, Yu Song, Andriy H. Nevidomskyy, Pengcheng Dai, L. Patthey, N. C. Plumb, M. Radovic, J. Mesot, and M. Shi

Phys. Rev. Lett. 117, 097001 (2016) - Published 25 August, 2016

Competing Orders in a Nearly Antiferromagnetic Metal

Yoni Schattner, Max H. Gerlach, Simon Trebst, and Erez Berg

Phys. Rev. Lett. 117, 097002 (2016) - Published 26 August, 2016

Thermal Conductivity of the Iron-Based Superconductor FeSe: Nodeless Gap with a Strong Two-Band Character

P. Bourgeois-Hope, S. Chi, D. A. Bonn, R. Liang, W. N. Hardy, T. Wolf, C. Meingast, N. Doiron-Leyraud, and Louis Taillefer

Phys. Rev. Lett. 117, 097003 (2016) - Published 26 August, 2016

Muon Spin Relaxation Evidence for the U(1) Quantum Spin-Liquid Ground State in the Triangular Antiferromagnet ${YbMgGaO}_{4}$

Yuesheng Li, Devashibhai Adroja, Pabitra K. Biswas, Peter J. Baker, Qian Zhang, Juanjuan Liu, Alexander A. Tsirlin, Philipp Gegenwart, and Qingming Zhang

Phys. Rev. Lett. 117, 097201 (2016) - Published 23 August, 2016