Volume 115, Issue 25

18 December 2015

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On the Cover

Mosaic based on a picture of John Stewart Bell taken by Renate Bertlmann, and composed of pictures of some quantum physicists, papers, and experiments. A pair of Letters reports statistically significant loophole-free Bell tests which rule out local realism. A high-resolution version of the image can be found here. Selected for Editors’ Suggestions and a Viewpoint in Physics.

From the article:

Significant-Loophole-Free Test of Bell’s Theorem with Entangled Photons
Marissa Giustina, Marijn A. M. Versteegh, Sören Wengerowsky, Johannes Handsteiner, Armin Hochrainer, Kevin Phelan, Fabian Steinlechner, Johannes Kofler, Jan-Åke Larsson, Carlos Abellán, Waldimar Amaya, Valerio Pruneri, Morgan W. Mitchell, Jörn Beyer, Thomas Gerrits, Adriana E. Lita, Lynden K. Shalm, Sae Woo Nam, Thomas Scheidl, Rupert Ursin, Bernhard Wittmann, and Anton Zeilinger
Phys. Rev. Lett. 115, 250401 (2015)

HIGHLIGHTED ARTICLES

FEATURED IN PHYSICS

EDITORS' SUGGESTION

Significant-Loophole-Free Test of Bell’s Theorem with Entangled Photons

Marissa Giustina, Marijn A. M. Versteegh, Sören Wengerowsky, Johannes Handsteiner, Armin Hochrainer, Kevin Phelan, Fabian Steinlechner, Johannes Kofler, Jan-Åke Larsson, Carlos Abellán, Waldimar Amaya, Valerio Pruneri, Morgan W. Mitchell, Jörn Beyer, Thomas Gerrits, Adriana E. Lita, Lynden K. Shalm, Sae Woo Nam, Thomas Scheidl, Rupert Ursin, Bernhard Wittmann, and Anton Zeilinger

Phys. Rev. Lett. 115, 250401 (2015) - Published 16 December, 2015

By closing two loopholes at once, three experimental tests of Bell’s inequalities remove the last doubts that we should renounce local realism. They also open the door to new quantum information technologies.

FEATURED IN PHYSICS

EDITORS' SUGGESTION

Strong Loophole-Free Test of Local Realism

Lynden K. Shalm et al.

Phys. Rev. Lett. 115, 250402 (2015) - Published 16 December, 2015

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EDITORS' SUGGESTION

Experimental Observation of Large Chern Numbers in Photonic Crystals

Scott A. Skirlo, Ling Lu, Yuichi Igarashi, Qinghui Yan, John Joannopoulos, and Marin Soljačić

Phys. Rev. Lett. 115, 253901 (2015) - Published 14 December, 2015

A two-dimensional photonic crystal has multiple topologically protected channels, which can be used to transmit and reroute light without scattering losses.

FEATURED IN PHYSICS

EDITORS' SUGGESTION

Magnetic Alignment of Block Copolymer Microdomains by Intrinsic Chain Anisotropy

Yekaterina Rokhlenko, Manesh Gopinadhan, Chinedum O. Osuji, Kai Zhang, Corey S. O’Hern, Steven R. Larson, Padma Gopalan, Paweł W. Majewski, and Kevin G. Yager

Phys. Rev. Lett. 115, 258302 (2015) - Published 18 December, 2015

Experiments demonstrate that a magnetic field can cause polymers to organize into arrangements that are potentially useful for clean energy products.

FEATURED IN PHYSICS

Generation of Fresh and Pure Random Numbers for Loophole-Free Bell Tests

Carlos Abellán, Waldimar Amaya, Daniel Mitrani, Valerio Pruneri, and Morgan W. Mitchell

Phys. Rev. Lett. 115, 250403 (2015) - Published 16 December, 2015

A fast random number generator based on laser dynamics helps test the foundations of quantum physics.

EDITORS' SUGGESTION

Cosmological Higgs-Axion Interplay for a Naturally Small Electroweak Scale

J. R. Espinosa, C. Grojean, G. Panico, A. Pomarol, O. Pujolàs, and G. Servant

Phys. Rev. Lett. 115, 251803 (2015) - Published 16 December, 2015

Weak coupling of the Higgs boson to two axionlike states could lead to a naturally small electroweak scale, which could be detected via their astrophysical and cosmological effects.

EDITORS' SUGGESTION

Three New Low-Energy Resonances in the ${}^{22}{Ne} (p, γ) {}^{23}{Na}$ Reaction

F. Cavanna et al. (The LUNA Collaboration)

Phys. Rev. Lett. 115, 252501 (2015) - Published 15 December, 2015

New resonances are observed in $^{22}$ Ne( $p, γ$ ) $^{23}$ Na reactions at energies relevant to element production in stars and novae. The resulting reaction rates are five times higher than previous measurements indicating a higher abundance of sodium and neon in these systems.

EDITORS' SUGGESTION

Broadband Acoustic Hyperbolic Metamaterial

Chen Shen, Yangbo Xie, Ni Sui, Wenqi Wang, Steven A. Cummer, and Yun Jing

Phys. Rev. Lett. 115, 254301 (2015) - Published 16 December, 2015

An array of rigid paper squares contained in aluminum frames is used to create a hyperbolic acoustic metamaterial.

EDITORS' SUGGESTION

Experimental Evidence for Dark Excitons in Monolayer ${WSe}_{2}$

Xiao-Xiao Zhang, Yumeng You, Shu Yang Frank Zhao, and Tony F. Heinz

Phys. Rev. Lett. 115, 257403 (2015) - Published 15 December, 2015

Photoluminescence measurements of WSe $_{2}$ , a 2D semiconductor, reveal optically forbidden excitations in the material.

LETTERS

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

FEATURED IN PHYSICS

EDITORS' SUGGESTION

Significant-Loophole-Free Test of Bell’s Theorem with Entangled Photons

Phys. Rev. Lett. 115, 250401 (2015) - Published 16 December, 2015

FEATURED IN PHYSICS

EDITORS' SUGGESTION

Strong Loophole-Free Test of Local Realism

Lynden K. Shalm et al.

Phys. Rev. Lett. 115, 250402 (2015) - Published 16 December, 2015

FEATURED IN PHYSICS

Generation of Fresh and Pure Random Numbers for Loophole-Free Bell Tests

Carlos Abellán, Waldimar Amaya, Daniel Mitrani, Valerio Pruneri, and Morgan W. Mitchell

Phys. Rev. Lett. 115, 250403 (2015) - Published 16 December, 2015

A fast random number generator based on laser dynamics helps test the foundations of quantum physics.

Arbitrarily Long Relativistic Bit Commitment

Kaushik Chakraborty, André Chailloux, and Anthony Leverrier

Phys. Rev. Lett. 115, 250501 (2015) - Published 17 December, 2015

Carving Complex Many-Atom Entangled States by Single-Photon Detection

Wenlan Chen, Jiazhong Hu, Yiheng Duan, Boris Braverman, Hao Zhang, and Vladan Vuletić

Phys. Rev. Lett. 115, 250502 (2015) - Published 18 December, 2015

Split Orthogonal Group: A Guiding Principle for Sign-Problem-Free Fermionic Simulations

Lei Wang, Ye-Hua Liu, Mauro Iazzi, Matthias Troyer, and Gergely Harcos

Phys. Rev. Lett. 115, 250601 (2015) - Published 17 December, 2015

Decision Making in the Arrow of Time

Édgar Roldán, Izaak Neri, Meik Dörpinghaus, Heinrich Meyr, and Frank Jülicher

Phys. Rev. Lett. 115, 250602 (2015) - Published 16 December, 2015

Gravitation and Astrophysics

Analyzing the Discovery Potential for Light Dark Matter

Eder Izaguirre, Gordan Krnjaic, Philip Schuster, and Natalia Toro

Phys. Rev. Lett. 115, 251301 (2015) - Published 15 December, 2015

Elementary Particles and Fields

Pomeron Eigenvalue at Three Loops in $N = 4$ Supersymmetric Yang-Mills Theory

Nikolay Gromov, Fedor Levkovich-Maslyuk, and Grigory Sizov

Phys. Rev. Lett. 115, 251601 (2015) - Published 14 December, 2015

Towards More Precise Determinations of the Quark Mixing Phase $β$

Zoltan Ligeti and Dean J. Robinson

Phys. Rev. Lett. 115, 251801 (2015) - Published 16 December, 2015

Sum Rules of Charm $C P$ Asymmetries beyond the ${SU (3)}_{F}$ Limit

Sarah Müller, Ulrich Nierste, and Stefan Schacht

Phys. Rev. Lett. 115, 251802 (2015) - Published 16 December, 2015

EDITORS' SUGGESTION

Cosmological Higgs-Axion Interplay for a Naturally Small Electroweak Scale

J. R. Espinosa, C. Grojean, G. Panico, A. Pomarol, O. Pujolàs, and G. Servant

Phys. Rev. Lett. 115, 251803 (2015) - Published 16 December, 2015

Weak coupling of the Higgs boson to two axionlike states could lead to a naturally small electroweak scale, which could be detected via their astrophysical and cosmological effects.

Nuclear Physics

Distribution of Linearly Polarized Gluons and Elliptic Azimuthal Anisotropy in Deep Inelastic Scattering Dijet Production at High Energy

Adrian Dumitru, Tuomas Lappi, and Vladimir Skokov

Phys. Rev. Lett. 115, 252301 (2015) - Published 17 December, 2015

EDITORS' SUGGESTION

Three New Low-Energy Resonances in the ${}^{22}{Ne} (p, γ) {}^{23}{Na}$ Reaction

F. Cavanna et al. (The LUNA Collaboration)

Phys. Rev. Lett. 115, 252501 (2015) - Published 15 December, 2015

Atomic, Molecular, and Optical Physics

Synchronous Spin-Exchange Optical Pumping

A. Korver, D. Thrasher, M. Bulatowicz, and T. G. Walker

Phys. Rev. Lett. 115, 253001 (2015) - Published 18 December, 2015

Nonlinear Dynamics, Fluid Dynamics, Classical Optics, etc.

FEATURED IN PHYSICS

EDITORS' SUGGESTION

Experimental Observation of Large Chern Numbers in Photonic Crystals

Scott A. Skirlo, Ling Lu, Yuichi Igarashi, Qinghui Yan, John Joannopoulos, and Marin Soljačić

Phys. Rev. Lett. 115, 253901 (2015) - Published 14 December, 2015

A two-dimensional photonic crystal has multiple topologically protected channels, which can be used to transmit and reroute light without scattering losses.

Stable Solitons in Three Dimensional Free Space without the Ground State: Self-Trapped Bose-Einstein Condensates with Spin-Orbit Coupling

Yong-Chang Zhang, Zheng-Wei Zhou, Boris A. Malomed, and Han Pu

Phys. Rev. Lett. 115, 253902 (2015) - Published 17 December, 2015

Observation of Coexisting Dissipative Solitons in a Mode-Locked Fiber Laser

Chengying Bao, Wonkeun Chang, Changxi Yang, Nail Akhmediev, and Steven T. Cundiff

Phys. Rev. Lett. 115, 253903 (2015) - Published 18 December, 2015

Localization of Chaotic Resonance States due to a Partial Transport Barrier

Martin J. Körber, Arnd Bäcker, and Roland Ketzmerick

Phys. Rev. Lett. 115, 254101 (2015) - Published 15 December, 2015

EDITORS' SUGGESTION

Broadband Acoustic Hyperbolic Metamaterial

Chen Shen, Yangbo Xie, Ni Sui, Wenqi Wang, Steven A. Cummer, and Yun Jing

Phys. Rev. Lett. 115, 254301 (2015) - Published 16 December, 2015

An array of rigid paper squares contained in aluminum frames is used to create a hyperbolic acoustic metamaterial.

Propagation Dynamics of Nonspreading Cosine-Gauss Water-Wave Pulses

Shenhe Fu, Yuval Tsur, Jianying Zhou, Lev Shemer, and Ady Arie

Phys. Rev. Lett. 115, 254501 (2015) - Published 18 December, 2015

Condensed Matter: Structure, etc.

Dynamic Pattern Formation in Electron-Beam-Induced Etching

Aiden A. Martin, Alan Bahm, James Bishop, Igor Aharonovich, and Milos Toth

Phys. Rev. Lett. 115, 255501 (2015) - Published 15 December, 2015

Thermal Resistance of Transferred-Silicon-Nanomembrane Interfaces

D. P. Schroeder, Z. Aksamija, A. Rath, P. M. Voyles, M. G. Lagally, and M. A. Eriksson

Phys. Rev. Lett. 115, 256101 (2015) - Published 15 December, 2015

Interfacial Ordering and Accompanying Divergent Capacitance at Ionic Liquid-Metal Interfaces

David T. Limmer

Phys. Rev. Lett. 115, 256102 (2015) - Published 17 December, 2015

In situ Determination of Surface Tension-to-Shear Viscosity Ratio for Quasiliquid Layers on Ice Crystal Surfaces

Ken-ichiro Murata, Harutoshi Asakawa, Ken Nagashima, Yoshinori Furukawa, and Gen Sazaki

Phys. Rev. Lett. 115, 256103 (2015) - Published 17 December, 2015

Structure of Self-Assembled Mn Atom Chains on Si(001)

R. Villarreal, M. Longobardi, S. A. Köster, Ch. J. Kirkham, D. Bowler, and Ch. Renner

Phys. Rev. Lett. 115, 256104 (2015) - Published 18 December, 2015

Condensed Matter: Electronic Properties, etc.

Spatial Patterns of Dissipative Polariton Solitons in Semiconductor Microcavities

J. K. Chana, M. Sich, F. Fras, A. V. Gorbach, D. V. Skryabin, E. Cancellieri, E. A. Cerda-Méndez, K. Biermann, R. Hey, P. V. Santos, M. S. Skolnick, and D. N. Krizhanovskii

Phys. Rev. Lett. 115, 256401 (2015) - Published 15 December, 2015

Free Energy from Stationary Implementation of the $DFT + DMFT$ Functional

Kristjan Haule and Turan Birol

Phys. Rev. Lett. 115, 256402 (2015) - Published 16 December, 2015

Bandwidth and Electron Correlation-Tuned Superconductivity in ${Rb}_{0.8} {Fe}_{2} ({Se}_{1 - z} S_{z})_{2}$

M. Yi, Meng Wang, A. F. Kemper, S.-K. Mo, Z. Hussain, E. Bourret-Courchesne, A. Lanzara, M. Hashimoto, D. H. Lu, Z.-X. Shen, and R. J. Birgeneau

Phys. Rev. Lett. 115, 256403 (2015) - Published 15 December, 2015

Surface Tomonaga-Luttinger-Liquid State on $Bi / InSb (001)$

Yoshiyuki Ohtsubo, Jun-ichiro Kishi, Kenta Hagiwara, Patrick Le Fèvre, François Bertran, Amina Taleb-Ibrahimi, Hiroyuki Yamane, Shin-ichiro Ideta, Masaharu Matsunami, Kiyohisa Tanaka, and Shin-ichi Kimura

Phys. Rev. Lett. 115, 256404 (2015) - Published 17 December, 2015

Temperature Dependence of Magnetically Active Charge Excitations in Magnetite across the Verwey Transition

M. Taguchi, A. Chainani, S. Ueda, M. Matsunami, Y. Ishida, R. Eguchi, S. Tsuda, Y. Takata, M. Yabashi, K. Tamasaku, Y. Nishino, T. Ishikawa, H. Daimon, S. Todo, H. Tanaka, M. Oura, Y. Senba, H. Ohashi, and S. Shin

Phys. Rev. Lett. 115, 256405 (2015) - Published 17 December, 2015

Scrutinizing Hall Effect in ${Mn}_{1 - x} {Fe}_{x} Si$ : Fermi Surface Evolution and Hidden Quantum Criticality

V. V. Glushkov, I. I. Lobanova, V. Yu. Ivanov, V. V. Voronov, V. A. Dyadkin, N. M. Chubova, S. V. Grigoriev, and S. V. Demishev

Phys. Rev. Lett. 115, 256601 (2015) - Published 18 December, 2015

Edge States and Topological Insulating Phases Generated by Curving a Nanowire with Rashba Spin-Orbit Coupling

Paola Gentile, Mario Cuoco, and Carmine Ortix

Phys. Rev. Lett. 115, 256801 (2015) - Published 16 December, 2015

Photoconductivity Response at Cyclotron-Resonance Harmonics in a Nondegenerate Two-Dimensional Electron Gas on Liquid Helium

R. Yamashiro, L. V. Abdurakhimov, A. O. Badrutdinov, Yu. P. Monarkha, and D. Konstantinov

Phys. Rev. Lett. 115, 256802 (2015) - Published 16 December, 2015

Exponentially Slow Heating in Periodically Driven Many-Body Systems

Dmitry A. Abanin, Wojciech De Roeck, and François Huveneers

Phys. Rev. Lett. 115, 256803 (2015) - Published 15 December, 2015

Transient Dynamics of $d$ -Wave Superconductors after a Sudden Excitation

Francesco Peronaci, Marco Schiró, and Massimo Capone

Phys. Rev. Lett. 115, 257001 (2015) - Published 15 December, 2015

Giant Magnetic Anisotropy of Co, Ru, and Os Adatoms on MgO (001) Surface

Xuedong Ou, Hongbo Wang, Fengren Fan, Zhengwei Li, and Hua Wu

Phys. Rev. Lett. 115, 257201 (2015) - Published 17 December, 2015

Detection of the Anomalous Velocity with Subpicosecond Time Resolution in Semiconductor Nanostructures

Shekhar Priyadarshi, Klaus Pierz, and Mark Bieler

Phys. Rev. Lett. 115, 257401 (2015) - Published 15 December, 2015

Surface Collective Modes in the Topological Insulators ${Bi}_{2} {Se}_{3}$ and ${Bi}_{0.5} {Sb}_{1.5} {Te}_{3 - x} {Se}_{x}$

A. Kogar, S. Vig, A. Thaler, M. H. Wong, Y. Xiao, D. Reig-i-Plessis, G. Y. Cho, T. Valla, Z. Pan, J. Schneeloch, R. Zhong, G. D. Gu, T. L. Hughes, G. J. MacDougall, T.-C. Chiang, and P. Abbamonte

Phys. Rev. Lett. 115, 257402 (2015) - Published 15 December, 2015

EDITORS' SUGGESTION

Experimental Evidence for Dark Excitons in Monolayer ${WSe}_{2}$

Xiao-Xiao Zhang, Yumeng You, Shu Yang Frank Zhao, and Tony F. Heinz

Phys. Rev. Lett. 115, 257403 (2015) - Published 15 December, 2015

Photoluminescence measurements of WSe $_{2}$ , a 2D semiconductor, reveal optically forbidden excitations in the material.

Polymer, Soft Matter, Biological, and Interdisciplinary Physics

Hydrodynamics of Turning Flocks

Xingbo Yang and M. Cristina Marchetti

Phys. Rev. Lett. 115, 258101 (2015) - Published 17 December, 2015

Microalgae Scatter off Solid Surfaces by Hydrodynamic and Contact Forces

Matteo Contino, Enkeleida Lushi, Idan Tuval, Vasily Kantsler, and Marco Polin

Phys. Rev. Lett. 115, 258102 (2015) - Published 17 December, 2015

Optimal Prediction by Cellular Signaling Networks

Nils B. Becker, Andrew Mugler, and Pieter Rein ten Wolde

Phys. Rev. Lett. 115, 258103 (2015) - Published 17 December, 2015

Homeostatic Fluctuations of a Tissue Surface

Thomas Risler, Aurélien Peilloux, and Jacques Prost

Phys. Rev. Lett. 115, 258104 (2015) - Published 18 December, 2015

Clustering and Pattern Formation in Chemorepulsive Active Colloids

Benno Liebchen, Davide Marenduzzo, Ignacio Pagonabarraga, and Michael E. Cates

Phys. Rev. Lett. 115, 258301 (2015) - Published 16 December, 2015

FEATURED IN PHYSICS

EDITORS' SUGGESTION

Magnetic Alignment of Block Copolymer Microdomains by Intrinsic Chain Anisotropy

Yekaterina Rokhlenko, Manesh Gopinadhan, Chinedum O. Osuji, Kai Zhang, Corey S. O’Hern, Steven R. Larson, Padma Gopalan, Paweł W. Majewski, and Kevin G. Yager

Phys. Rev. Lett. 115, 258302 (2015) - Published 18 December, 2015

Experiments demonstrate that a magnetic field can cause polymers to organize into arrangements that are potentially useful for clean energy products.

ERRATA

Erratum: $C P$ -Violating Effect of the Th Nuclear Magnetic Quadrupole Moment: Accurate Many-Body Study of ThO [Phys. Rev. Lett. 113, 263006 (2014)]

L. V. Skripnikov, A. N. Petrov, A. V. Titov, and V. V. Flambaum

Phys. Rev. Lett. 115, 259901 (2015) - Published 15 December, 2015