Author(s): Luca V. Delacrétaz and Andrey GromovA method is proposed for measuring the classical Hall viscosity of a two-dimensional electron gas under a magnetic field, via signatures of hydrodynamic transport.[Phys. Rev. Lett. 119, 226602] Published T…

## Negative Spin Exchange in a Multielectron Quantum Dot

Author(s): Frederico Martins, Filip K. Malinowski, Peter D. Nissen, Saeed Fallahi, Geoffrey C. Gardner, Michael J. Manfra, Charles M. Marcus, and Ferdinand KuemmethExperiments show that a semiconducting quantum dot containing nearly 100 electrons can o…

## Maximum Redshift of Gravitational Wave Merger Events

Author(s): Savvas M. Koushiappas and Abraham LoebObservations of black hole mergers in the very distant Universe could indicate whether all black holes form from stars.[Phys. Rev. Lett. 119, 221104] Published Thu Nov 30, 2017

## Two-Dimensional Dirac Fermions Protected by Space-Time Inversion Symmetry in Black Phosphorus

Author(s): Jimin Kim, Seung Su Baik, Sung Won Jung, Yeongsup Sohn, Sae Hee Ryu, Hyoung Joon Choi, Bohm-Jung Yang, and Keun Su KimExperimental evidence is presented for the realization of a 2D Dirac semimetal in black phosphorous, a material in which, u…

## Phase Memory Preserving Harmonics from Abruptly Autofocusing Beams

Author(s): Anastasios D. Koulouklidis, Dimitris G. Papazoglou, Vladimir Yu. Fedorov, and Stelios TzortzakisExperiments on autofocusing ring-Airy beams reveal that the harmonics preserve the phase distribution of the fundamental beam. This “phase memory…

## Stability Landscape of Shell Buckling

Author(s): Emmanuel Virot, Tobias Kreilos, Tobias M. Schneider, and Shmuel M. RubinsteinExperiments reveal what kinds of dents render a can and other metal shells crushable.[Phys. Rev. Lett. 119, 224101] Published Tue Nov 28, 2017

## Universal Scaling and Critical Exponents of the Anisotropic Quantum Rabi Model

Author(s): Maoxin Liu, Stefano Chesi, Zu-Jian Ying, Xiaosong Chen, Hong-Gang Luo, and Hai-Qing LinTheoretical predictions establish the phase diagram, scaling functions, and critical exponents of the quantum phase transition in the anisotropic quantum …

## Coherent Control of a Single Trapped Rydberg Ion

Author(s): Gerard Higgins, Fabian Pokorny, Chi Zhang, Quentin Bodart, and Markus HennrichA single-qubit phase gate is performed on an ion through coherent Rydberg excitation, demonstrating one element of a trapped Rydberg ion quantum computer.[Phys. Re…

## Buckling Instability Causes Inertial Thrust for Spherical Swimmers at All Scales

Author(s): Adel Djellouli, Philippe Marmottant, Henda Djeridi, Catherine Quilliet, and Gwennou CoupierA sphere that alternately collapses and re-inflates makes a simple device that can propel itself and could work on the microscale for medical purposes…

## Switching Magnetism and Superconductivity with Spin-Polarized Current in Iron-Based Superconductor

Author(s): Seokhwan Choi, Hyoung Joon Choi, Jong Mok Ok, Yeonghoon Lee, Won-Jun Jang, Alex Taekyung Lee, Young Kuk, SungBin Lee, Andreas J. Heinrich, Sang-Wook Cheong, Yunkyu Bang, Steven Johnston, Jun Sung Kim, and Jhinhwan LeeA current of electrons w…

## Magnetic Exchange Interactions in the Molecular Nanomagnet ${\mathrm{Mn}}_{12}$

Author(s): A. Chiesa, T. Guidi, S. Carretta, S. Ansbro, G. A. Timco, I. Vitorica-Yrezabal, E. Garlatti, G. Amoretti, R. E. P. Winpenny, and P. SantiniResearchers characterize the spin couplings in the prototypical single-molecule magnet Mn12 using an a…

## Revealing the Topology of Quasicrystals with a Diffraction Experiment

Author(s): A. Dareau, E. Levy, M. Bosch Aguilera, R. Bouganne, E. Akkermans, F. Gerbier, and J. BeugnonAn arrangement of lasers and mirrors is used to map the topology patterns of quasicrystals.[Phys. Rev. Lett. 119, 215304] Published Wed Nov 22, 2017

## State-of-the-Art Calculation of the Decay Rate of Electroweak Vacuum in the Standard Model

Author(s): So Chigusa, Takeo Moroi, and Yutaro ShojiA gauge-invariant calculation of the decay rate of the metastable vacuum removes some theoretical uncertainty in the Universe’s estimated lifetime.[Phys. Rev. Lett. 119, 211801] Published Tue Nov 21, …

## Inductive Spikes in the Crab Nebula: A Theory of $γ$-Ray Flares

Author(s): John G. Kirk and Gwenael GiacintiA mysterious gamma-ray emission from the Crab Nebula—a giant interstellar cloud of gas—may be due to fluctuations in the wind blown out from the pulsar in the nebula’s center.[Phys. Rev. Lett. 119, 211101] Pu…

## Correlated Three-Dimensional Imaging of Dislocations: Insights into the Onset of Thermal Slip in Semiconductor Wafers

Author(s): D. Hänschke, A. Danilewsky, L. Helfen, E. Hamann, and T. BaumbachA combination of imaging techniques provides an unprecedented 3D view of a network of crystal defects known as dislocations.[Phys. Rev. Lett. 119, 215504] Published Mon Nov 20,…

## Observation of Bogoliubov Band Hybridization in the Optimally Doped Trilayer ${\mathrm{Bi}}_{2}{\mathrm{Sr}}_{2}{\mathrm{Ca}}_{2}{\mathrm{Cu}}_{3}{\mathrm{O}}_{10+δ}$

Author(s): So Kunisada, Shintaro Adachi, Shiro Sakai, Nae Sasaki, Mitsuhiro Nakayama, Shuntaro Akebi, Kenta Kuroda, Takao Sasagawa, Takao Watanabe, Shik Shin, and Takeshi KondoThe experimental observation of band hybridization in a cuprate superconduct…

## Forced Imbibition in Porous Media: A Fourfold Scenario

Author(s): Céleste Odier, Bertrand Levaché, Enric Santanach-Carreras, and Denis BartoloExperiments mimicking a common oil drilling technique, in which fluid is forced into an oil-filled, porous medium, have uncovered four different flow patterns.[Phys….

## Superconductivity at the Polar-Nonpolar Phase Boundary of SnP with an Unusual Valence State

Author(s): M. Kamitani, M. S. Bahramy, T. Nakajima, C. Terakura, D. Hashizume, T. Arima, and Y. TokuraA low temperature superconducting phase (3-4K) in ferroelectric SnP is experimentally observed when its ferroelectric phase is suppressed through hydr…

## Superconducting-Gravimeter Tests of Local Lorentz Invariance

Author(s): Natasha A. Flowers, Casey Goodge, and Jay D. TassonTwo independent studies show no evidence that a fundamental symmetry in relativity, known as Lorentz invariance, breaks down.[Phys. Rev. Lett. 119, 201101] Published Thu Nov 16, 2017

## Interaction Dependent Heating and Atom Loss in a Periodically Driven Optical Lattice

Author(s): Martin Reitter, Jakob Näger, Karen Wintersperger, Christoph Sträter, Immanuel Bloch, André Eckardt, and Ulrich SchneiderExperiments confirm that photon interactions cause heating of ultracold atoms in a periodically driven optical lattice. D…

## Lorentz Symmetry Violations from Matter-Gravity Couplings with Lunar Laser Ranging

Author(s): A. Bourgoin, C. Le Poncin-Lafitte, A. Hees, S. Bouquillon, G. Francou, and M.-C. AngoninTwo independent studies show no evidence that a fundamental symmetry in relativity, known as Lorentz invariance, breaks down.[Phys. Rev. Lett. 119, 20110…

## Double-Exchange Interaction in Optically Induced Nonequilibrium State: A Conversion from Ferromagnetic to Antiferromagnetic Structure

Author(s): Atsushi Ono and Sumio IshiharaA theoretical proposal suggests that a ferromagnet could be optically switched into an antiferromagnet by manipulating the double exchange interaction.[Phys. Rev. Lett. 119, 207202] Published Thu Nov 16, 2017

## Discovery of the Doubly Charmed ${\mathrm{Ξ}}_{cc}$ Baryon Implies a Stable $bb\overline{u}\overline{d}$ Tetraquark

Author(s): Marek Karliner and Jonathan L. RosnerA pair of theory papers use the recently discovered double-charmed baryon to predict double-beauty tetraquarks.[Phys. Rev. Lett. 119, 202001] Published Wed Nov 15, 2017

## Heavy-Quark Symmetry Implies Stable Heavy Tetraquark Mesons ${Q}_{i}{Q}_{j}{\overline{q}}_{k}{\overline{q}}_{l}$

Author(s): Estia J. Eichten and Chris QuiggA pair of theory papers use the recently discovered double-charmed baryon to predict double-beauty tetraquarks.[Phys. Rev. Lett. 119, 202002] Published Wed Nov 15, 2017

## Sliding Drops: Ensemble Statistics from Single Drop Bifurcations

Author(s): Markus Wilczek, Walter Tewes, Sebastian Engelnkemper, Svetlana V. Gurevich, and Uwe ThieleA statistical model of drops merging and splitting as they slide down an inclined plane shows that the drop ensemble properties converge to a near stat…

## Origin of Negative Longitudinal Piezoelectric Effect

Author(s): Shi Liu and R. E. CohenThe negative longitudinal piezoelectric effect is predicted to be a general phenomenon caused by the strong ionic bonds, whose origin lies in small effective charges and rigid potential energy surfaces.[Phys. Rev. Lett…

## Observation of Broad $d$-Wave Feshbach Resonances with a Triplet Structure

Author(s): Yue Cui, Chuyang Shen, Min Deng, Shen Dong, Cheng Chen, Rong Lü, Bo Gao, Meng Khoon Tey, and Li Youd-wave interactions like those thought to underlie unconventional superconductivity have been implemented in a cold-atom gas.[Phys. Rev. Lett….

## Satellite-to-Ground Entanglement-Based Quantum Key Distribution

Author(s): Juan Yin, Yuan Cao, Yu-Huai Li, Ji-Gang Ren, Sheng-Kai Liao, Liang Zhang, Wen-Qi Cai, Wei-Yue Liu, Bo Li, Hui Dai, Ming Li, Yong-Mei Huang, Lei Deng, Li Li, Qiang Zhang, Nai-Le Liu, Yu-Ao Chen, Chao-Yang Lu, Rong Shu, Cheng-Zhi Peng, Jian-Yu…

## Generation of Caustics and Rogue Waves from Nonlinear Instability

Author(s): Akbar Safari, Robert Fickler, Miles J. Padgett, and Robert W. BoydExperiments show that the nonlinear response of an optical system can enhance localization of energy, leading to the formation of rogue waves.[Phys. Rev. Lett. 119, 203901] Pu…

## Direct Imaging of a Zero-Field Target Skyrmion and Its Polarity Switch in a Chiral Magnetic Nanodisk

Author(s): Fengshan Zheng, Hang Li, Shasha Wang, Dongsheng Song, Chiming Jin, Wenshen Wei, András Kovács, Jiadong Zang, Mingliang Tian, Yuheng Zhang, Haifeng Du, and Rafal E. Dunin-BorkowskiA vortex-like magnetic spin structure inside a small disk of m…

## Quantifying the Coherence between Coherent States

Author(s): Kok Chuan Tan, Tyler Volkoff, Hyukjoon Kwon, and Hyunseok JeongA measure ties quantum coherence inextricably to the nonclassicality of light, showing that resources underlying both phenomena are the same.[Phys. Rev. Lett. 119, 190405] Publis…

## Spin-Resolved Spectroscopy of the Yu-Shiba-Rusinov States of Individual Atoms

Author(s): L. Cornils, A. Kamlapure, L. Zhou, S. Pradhan, A. A. Khajetoorians, J. Fransson, J. Wiebe, and R. WiesendangerThe first experimental evidence is presented for the spin-polarization of Yu-Shiba-Rusinov states induced by the presence of a sing…

## Photonic Counterparts of Cooper Pairs

Author(s): André Saraiva, Filomeno S. de Aguiar Júnior, Reinaldo de Melo e Souza, Arthur Patrocínio Pena, Carlos H. Monken, Marcelo F. Santos, Belita Koiller, and Ado JorioA pairing of photons—similar to the pairing of electrons in superconductors—can …

## Cross-Kerr Nonlinearity for Phonon Counting

Author(s): Shiqian Ding, Gleb Maslennikov, Roland Hablützel, and Dzmitry MatsukevichThe motional states of trapped ions are nonlinearly coupled through the anharmonicity of the inter-ion Coublomb interaction.[Phys. Rev. Lett. 119, 193602] Published Wed…

## Focusing and Sorting of Ellipsoidal Magnetic Particles in Microchannels

Author(s): Daiki Matsunaga, Fanlong Meng, Andreas Zöttl, Ramin Golestanian, and Julia M. YeomansResearchers propose a scheme to position, focus, and sort magnetic particles in a microchannel with a magnetic field.[Phys. Rev. Lett. 119, 198002] Publishe…

## Cancellation Mechanism for Dark-Matter–Nucleon Interaction

Author(s): Christian Gross, Oleg Lebedev, and Takashi TomaA simple Higgs portal dark matter model could explain why dark matter in the form of weakly interacting massive particles has not yet been directly detected.[Phys. Rev. Lett. 119, 191801] Publis…

## Quantum Depletion of a Homogeneous Bose-Einstein Condensate

Author(s): Raphael Lopes, Christoph Eigen, Nir Navon, David Clément, Robert P. Smith, and Zoran HadzibabicAn experiment with cold atoms confirms a 70-year-old theory predicting the fraction of a Bose gas that turns into a Bose-Einstein condensate.[Phys…

## Binding Energy of $^{79}\mathrm{Cu}$: Probing the Structure of the Doubly Magic $^{78}\mathrm{Ni}$ from Only One Proton Away

Author(s): A. Welker, N. A. S. Althubiti, D. Atanasov, K. Blaum, T. E. Cocolios, F. Herfurth, S. Kreim, D. Lunney, V. Manea, M. Mougeot, D. Neidherr, F. Nowacki, A. Poves, M. Rosenbusch, L. Schweikhard, F. Wienholtz, R. N. Wolf, and K. ZuberTwo indepen…

## Ultrafast and Energy-Efficient Quenching of Spin Order: Antiferromagnetism Beats Ferromagnetism

Author(s): Nele Thielemann-Kühn, Daniel Schick, Niko Pontius, Christoph Trabant, Rolf Mitzner, Karsten Holldack, Hartmut Zabel, Alexander Föhlisch, and Christian Schüßler-LangeheineA class of magnetic materials can be reordered at the nanoscale more ra…

## Persistence of the $Z=28$ Shell Gap Around $^{78}\mathrm{Ni}$: First Spectroscopy of $^{79}\mathrm{Cu}$

Author(s): L. Olivier et al.Two independent experiments on the isotope copper-79 confirm that its nuclear neighbor nickel-78 is indeed a doubly magic nucleus.[Phys. Rev. Lett. 119, 192501] Published Mon Nov 06, 2017

## 10-Qubit Entanglement and Parallel Logic Operations with a Superconducting Circuit

Author(s): Chao Song, Kai Xu, Wuxin Liu, Chui-ping Yang, Shi-Biao Zheng, Hui Deng, Qiwei Xie, Keqiang Huang, Qiujiang Guo, Libo Zhang, Pengfei Zhang, Da Xu, Dongning Zheng, Xiaobo Zhu, H. Wang, Y.-A. Chen, C.-Y. Lu, Siyuan Han, and Jian-Wei PanThe larg…

## Giant Kovacs-Like Memory Effect for Active Particles

Author(s): Rüdiger Kürsten, Vladimir Sushkov, and Thomas IhleThe prediction of memory effects in an active gas of polar point particles would mean that, contrary to expectations, the system cannot be fully characterized by the gas density and the polar…

## Operating Quantum States in Single Magnetic Molecules: Implementation of Grover’s Quantum Algorithm

Author(s): C. Godfrin, A. Ferhat, R. Ballou, S. Klyatskaya, M. Ruben, W. Wernsdorfer, and F. BalestroGrover’s algorithm, which finds an element in an unsorted list, has been implemented using a nuclear spin in a single-molecule magnet.[Phys. Rev. Lett….

## Qubit-Assisted Transduction for a Detection of Surface Acoustic Waves near the Quantum Limit

Author(s): Atsushi Noguchi, Rekishu Yamazaki, Yutaka Tabuchi, and Yasunobu NakamuraA superconducting qubit is used as an interface between a surface acoustic wave (SAW) resonator and a microwave resonator for ultrasensitive measurements of thermal fluc…

## Origin of Ultrastability in Vapor-Deposited Glasses

Author(s): Ludovic Berthier, Patrick Charbonneau, Elijah Flenner, and Francesco ZamponiSimulations explain why glasses produced by vapor deposition can be as stable as ordinary glasses that have aged for thousands of years.[Phys. Rev. Lett. 119, 188002…

## Disorder-Induced Topological State Transition in Photonic Metamaterials

Author(s): Changxu Liu, Wenlong Gao, Biao Yang, and Shuang ZhangA topological hybrid state consisting of a robust surface state in the presence of moderate randomness is predicted in metamaterials, which may allow for the development of a random unidir…

## Improved Limits for Higgs-Portal Dark Matter from LHC Searches

Author(s): Martin Hoferichter, Philipp Klos, Javier Menéndez, and Achim SchwenkNew theoretical work places more stringent constraints on dark matter properties derived from particle physics experiments.[Phys. Rev. Lett. 119, 181803] Published Tue Oct 3…

## Experimental Demonstration of Fault-Tolerant State Preparation with Superconducting Qubits

Author(s): Maika Takita, Andrew W. Cross, A. D. Córcoles, Jerry M. Chow, and Jay M. GambettaUsing the IBM Quantum Experience, researchers have demonstrated fault-tolerant quantum computing principles that protect against local dissipation and gate erro…

## Dark Matter Results from 54-Ton-Day Exposure of PandaX-II Experiment

Author(s): Xiangyi Cui et al. (PandaX-II Collaboration)The latest results from two dark matter searches have further ruled out many theoretically attractive dark matter particle candidates.[Phys. Rev. Lett. 119, 181302] Published Mon Oct 30, 2017

## First Dark Matter Search Results from the XENON1T Experiment

Author(s): E. Aprile et al. (XENON Collaboration)The latest results from two dark matter searches have further ruled out many theoretically attractive dark matter particle candidates.[Phys. Rev. Lett. 119, 181301] Published Mon Oct 30, 2017

## Dimensional Crossover-Induced Topological Hall Effect in a Magnetic Topological Insulator

Author(s): Chang Liu, Yunyi Zang, Wei Ruan, Yan Gong, Ke He, Xucun Ma, Qi-Kun Xue, and Yayu WangA topological variant of the Hall effect that relies on spin chirality is observed in a topological insulator at four quantum layers, but vanishes for fewer…

## Anisotropy and Suppression of Spin-Orbit Interaction in a GaAs Double Quantum Dot

Author(s): A. Hofmann, V. F. Maisi, T. Krähenmann, C. Reichl, W. Wegscheider, K. Ensslin, and T. IhnSpin orbit interactions in GaAs quantum wells are switched on and off by tuning the spin-flip tunneling rate.[Phys. Rev. Lett. 119, 176807] Published Fr…

## Emergent Bistability and Switching in a Nonequilibrium Crystal

Author(s): Guram Gogia and Justin C. BurtonBistable switching between a crystalline condensed state and a gaslike excited state is demonstrated in a system of charged microparticles.[Phys. Rev. Lett. 119, 178004] Published Thu Oct 26, 2017

## Control of Chiral Magnetism Through Electric Fields in Multiferroic Compounds above the Long-Range Multiferroic Transition

Author(s): J. Stein, M. Baum, S. Holbein, T. Finger, T. Cronert, C. Tölzer, T. Fröhlich, S. Biesenkamp, K. Schmalzl, P. Steffens, C. H. Lee, and M. BradenAn applied electric field can be used to control a twisted form of magnetic ordering inside small …

## Axicon Lens for Electrons Using a Magnetic Vortex: The Efficient Generation of a Bessel Beam

Author(s): Changlin Zheng, Timothy C. Petersen, Holm Kirmse, Wolfgang Neumann, Michael J. Morgan, and Joanne EtheridgeA magnetic vortex texture array is used to create an electromagnetic lens that focuses a plane wave into a focal line, rather than a p…

## Detection of Microwave Transitions between Ortho and Para States in a Free Isolated Molecule

Author(s): Hideto Kanamori, Zeinab. T. Dehghani, Asao Mizoguchi, and Yasuki EndoMicrowave emission from a simple molecule reveals a highly forbidden transition between two nuclear spin states.[Phys. Rev. Lett. 119, 173401] Published Wed Oct 25, 2017

## Superanomalous Skin Effect for Surface Plasmon Polaritons

Author(s): I. A. Larkin, K. Keil, A. Vagov, M. D. Croitoru, and V. M. AxtA third regime of electric field decay at a metal-dielectric interface is predicted, in which the field decays even more slowly than the previously known regimes.[Phys. Rev. Lett….

## Two-Particle Four-Mode Interferometer for Atoms

Author(s): Pierre Dussarrat, Maxime Perrier, Almazbek Imanaliev, Raphael Lopes, Alain Aspect, Marc Cheneau, Denis Boiron, and Christoph I. WestbrookA prototype interferometer for massive particles is demonstrated. Such a device could enable Bell test m…

## Origin of Spectral Band Patterns in the Cosmic Unidentified Infrared Emission

Author(s): Héctor Álvaro Galué and Grisell Díaz LeinesA theoretical study shows how hydrocarbons with structural defects might produce unexplained peaks in the cosmic infrared spectrum.[Phys. Rev. Lett. 119, 171102] Published Mon Oct 23, 2017

## Separation of Isotopes in Space and Time by Gas-Surface Atomic Diffraction

Author(s): Kevin J. Nihill, Jacob D. Graham, and S. J. SibenerAtomic-beam diffraction emerges as a viable approach to separating isotopes within the beam.[Phys. Rev. Lett. 119, 176001] Published Mon Oct 23, 2017

## Importance of $σ$ Bonding Electrons for the Accurate Description of Electron Correlation in Graphene

Author(s): Huihuo Zheng, Yu Gan, Peter Abbamonte, and Lucas K. WagnerElectron correlations in graphene are characterized via first principles calculations, showing that bonding of σ electrons is important in understanding the low energy physics of grap…

## Coulometry and Calorimetry of Electric Double Layer Formation in Porous Electrodes

Author(s): Mathijs Janssen, Elian Griffioen, P. M. Biesheuvel, René van Roij, and Ben ErnéTwo new experimental techniques that make coulometric and calorimetric measurements of porous electrodes are used to obtain the entropic contribution to the grand…

## Band Filling Control of the Dzyaloshinskii-Moriya Interaction in Weakly Ferromagnetic Insulators

Author(s): G. Beutier, S. P. Collins, O. V. Dimitrova, V. E. Dmitrienko, M. I. Katsnelson, Y. O. Kvashnin, A. I. Lichtenstein, V. V. Mazurenko, A. G. A. Nisbet, E. N. Ovchinnikova, and D. PinciniThe evolution of the sign of the Dzyaloshinskii-Moriya in…

## Observation of Optomechanical Strain in a Cold Atomic Cloud

Author(s): Noam Matzliah, Hagai Edri, Asif Sinay, Roee Ozeri, and Nir DavidsonLaser light can stretch and squeeze a whole cloud of atoms with a collective force.[Phys. Rev. Lett. 119, 163201] Published Thu Oct 19, 2017

## Insulating Josephson Junction Chains as Pinned Luttinger Liquids

Author(s): Karin Cedergren, Roger Ackroyd, Sergey Kafanov, Nicolas Vogt, Alexander Shnirman, and Timothy DutyThe Tomonaga-Luttinger theory describing one-dimensional materials has been tested with cold atoms and arrays of Josephson junctions.[Phys. Rev…

## Quantum criticality and the Tomonaga-Luttinger liquid in one-dimensional Bose gases

Author(s): Bing Yang, Yang-Yang Chen, Yong-Guang Zheng, Hui Sun, Han-Ning Dai, Xi-Wen Guan, Zhen-Sheng Yuan, and Jian-Wei PanThe Tomonaga-Luttinger theory describing one-dimensional materials has been tested with cold atoms and arrays of Josephson junc…

## Dynamo Action in a Quasi-Keplerian Taylor-Couette Flow

Author(s): Anna Guseva, Rainer Hollerbach, Ashley P. Willis, and Marc AvilaNumerical evidence is provided for self-sustaining dynamo action in a confined electrically conducting fluid, such as an astrophysical accretion disc.[Phys. Rev. Lett. 119, 1645…

## Are Gravitational Waves Spinning Down PSR $\mathrm{J}1023+0038$?

Author(s): B. Haskell and A. PatrunoA pulsar PSR J1023+0038 switches between two states that have different spin-down rates. A new analysis suggests that this discrepancy may be due to gravitational wave emission.[Phys. Rev. Lett. 119, 161103] Publishe…

## Revealing Quantum Statistics with a Pair of Distant Atoms

Author(s): C. F. Roos, A. Alberti, D. Meschede, P. Hauke, and H. HäffnerA proposed set of experiments could offer a direct measurement of the fundamental quantum property that distinguishes fermions from bosons.[Phys. Rev. Lett. 119, 160401] Published …

## GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral

Author(s): B. P. Abbott et al. (LIGO Scientific Collaboration and Virgo Collaboration)For the first time, researchers have detected both light and gravitational waves from the same event in space.[Phys. Rev. Lett. 119, 161101] Published Mon Oct 16, 2017

## Scalable Creation of Long-Lived Multipartite Entanglement

Author(s): H. Kaufmann, T. Ruster, C. T. Schmiegelow, M. A. Luda, V. Kaushal, J. Schulz, D. von Lindenfels, F. Schmidt-Kaler, and U. G. PoschingerA four-qubit entangled state is created in a scalable ion trap system, with fidelity exceeding 90%.[Phys. …

## Topological Hopf and Chain Link Semimetal States and Their Application to ${\mathrm{Co}}_{2}\mathrm{Mn}\text{G}\text{a}$

Author(s): Guoqing Chang, Su-Yang Xu, Xiaoting Zhou, Shin-Ming Huang, Bahadur Singh, Baokai Wang, Ilya Belopolski, Jiaxin Yin, Songtian Zhang, Arun Bansil, Hsin Lin, and M. Zahid HasanA new topological semimetal state is predicted, featuring three-dime…

## Spectroscopy and Directed Transport of Topological Solitons in Crystals of Trapped Ions

Author(s): J. Brox, P. Kiefer, M. Bujak, T. Schaetz, and H. LandaResearchers have directed the motion of a domain-wall-like topological defect through a crystal of trapped ions.[Phys. Rev. Lett. 119, 153602] Published Thu Oct 12, 2017

## How a Small Quantum Bath Can Thermalize Long Localized Chains

Author(s): David J. Luitz, François Huveneers, and Wojciech De RoeckNumerical simulations show that an imperfection as small as three units can destabilize the many-body localized phase of a one-dimensional chain.[Phys. Rev. Lett. 119, 150602] Publishe…

## Generating Single-Spike Hard X-Ray Pulses with Nonlinear Bunch Compression in Free-Electron Lasers

Author(s): S. Huang, Y. Ding, Y. Feng, E. Hemsing, Z. Huang, J. Krzywinski, A. A. Lutman, A. Marinelli, T. J. Maxwell, and D. ZhuX-ray free-electron lasers have been used to generate single spikes of hard x rays that are only 200 attoseconds long.[Phys…

## Giant Quantum Hall Plateau in Graphene Coupled to an InSe van der Waals Crystal

Author(s): Z. R. Kudrynskyi, M. A. Bhuiyan, O. Makarovsky, J. D. G. Greener, E. E. Vdovin, Z. D. Kovalyuk, Y. Cao, A. Mishchenko, K. S. Novoselov, P. H. Beton, L. Eaves, and A. PatanèInduced transfer of charge carriers is demonstrated in a graphene-bas…

## Precision Measurement of the Electron’s Electric Dipole Moment Using Trapped Molecular Ions

Author(s): William B. Cairncross, Daniel N. Gresh, Matt Grau, Kevin C. Cossel, Tanya S. Roussy, Yiqi Ni, Yan Zhou, Jun Ye, and Eric A. CornellNew precision experiments using trapped molecular ions provide an alternative method for determining if the el…

## GW170814: A Three-Detector Observation of Gravitational Waves from a Binary Black Hole Coalescence

Author(s): B. P. Abbott et al. (LIGO Scientific Collaboration and Virgo Collaboration)The first simultaneous detection of gravitational radiation by the LIGO and Virgo detectors greatly improves localization of the source and permits a novel test of ge…

## Inducing and Manipulating Heteroelectronic States in a Single ${\mathrm{MoS}}_{2}$ Thin Flake

Author(s): Q. H. Chen, J. M. Lu, L. Liang, O. Zheliuk, A. Ali, P. Sheng, and J. T. YeElectric fields applied on either side of a thin, semiconducting transition-metal dichalcogenide create a superconducting layer atop a metallic layer within the materi…

## Supercoiling DNA Locates Mismatches

Author(s): Andrew Dittmore, Sumitabha Brahmachari, Yasuharu Takagi, John F. Marko, and Keir C. NeumanSingle base-pair mismatches in DNA can be pinpointed by twisting the molecule until it buckles.[Phys. Rev. Lett. 119, 147801] Published Tue Oct 03, 2017

## Upper Bound on Diffusivity

Author(s): Thomas Hartman, Sean A. Hartnoll, and Raghu MahajanQuantum mechanical arguments give a hitherto unknown upper limit on the diffusion constant of any local conserved quantity.[Phys. Rev. Lett. 119, 141601] Published Mon Oct 02, 2017

## Long-Lived Ultracold Molecules with Electric and Magnetic Dipole Moments

Author(s): Timur M. Rvachov, Hyungmok Son, Ariel T. Sommer, Sepehr Ebadi, Juliana J. Park, Martin W. Zwierlein, Wolfgang Ketterle, and Alan O. JamisonThe creation of ultracold molecules that have both an electric and a magnetic dipole moment offers new…

## Effective One-Dimensional Coupling in the Highly Frustrated Square-Lattice Itinerant Magnet ${\mathrm{CaCo}}_{2−y}{\mathrm{As}}_{2}$

Author(s): A. Sapkota, B. G. Ueland, V. K. Anand, N. S. Sangeetha, D. L. Abernathy, M. B. Stone, J. L. Niedziela, D. C. Johnston, A. Kreyssig, A. I. Goldman, and R. J. McQueeney

A rare example of a highly frustrated metal is identified, where the frustration is due to competing exchange interactions of spins, and not due to the spin geometry.

[Phys. Rev. Lett. 119, 147201] Published Mon Oct 02, 2017

## Optimal Measurements for Simultaneous Quantum Estimation of Multiple Phases

Author(s): Luca Pezzè, Mario A. Ciampini, Nicolò Spagnolo, Peter C. Humphreys, Animesh Datta, Ian A. Walmsley, Marco Barbieri, Fabio Sciarrino, and Augusto Smerzi

The conditions for simultaneous quantum estimation of multiple parameters are derived, a desired step forward for the design of future quantum imaging and metrology devices.

[Phys. Rev. Lett. 119, 130504] Published Fri Sep 29, 2017

## Search for Invisible Decays of a Dark Photon Produced in ${e}^{+}{e}^{−}$ Collisions at <i>B<span class=”sc”>a</span>B<span class=”sc”>ar</span></i>

Author(s): J. P. Lees *et al.* (BaBar Collaboration)

The lack of so-called “dark photons” in electron-positron collision data rules out scenarios in which these hypothetical particles explain the muon’s magnetic moment

[Phys. Rev. Lett. 119, 131804] Published Thu Sep 28, 2017

## Many-Molecule Reaction Triggered by a Single Photon in Polaritonic Chemistry

Author(s): Javier Galego, Francisco J. Garcia-Vidal, and Johannes FeistUsing an optical cavity to couple several molecules can potentially set up a chemical chain reaction that requires just one photon to initiate.[Phys. Rev. Lett. 119, 136001] Publish…

## Ultimate Stable Underwater Superhydrophobic State

Author(s): Yaolei Xiang, Shenglin Huang, Pengyu Lv, Yahui Xue, Qiang Su, and Huiling DuanResearchers find tricks to prolong the typically short-lived water repellency of a superhydrophobic surface.[Phys. Rev. Lett. 119, 134501] Published Wed Sep 27, 2017

## Scaling of Majorana Zero-Bias Conductance Peaks

Author(s): Fabrizio Nichele, Asbjørn C. C. Drachmann, Alexander M. Whiticar, Eoin C. T. O’Farrell, Henri J. Suominen, Antonio Fornieri, Tian Wang, Geoffrey C. Gardner, Candice Thomas, Anthony T. Hatke, Peter Krogstrup, Michael J. Manfra, Karsten Flensberg, and Charles M. Marcus

Under certain conditions, conductance peaks at zero electrical bias may be considered as signatures of Majorana bound states.

[Phys. Rev. Lett. 119, 136803] Published Wed Sep 27, 2017

## Exposing the QCD Splitting Function with CMS Open Data

Author(s): Andrew Larkoski, Simone Marzani, Jesse Thaler, Aashish Tripathee, and Wei XueThe first analysis of public data from the CMS experiment at the LHC probes the substructures of jets produced in proton-proton collisions recorded in 2010.[Phys. R…

## Nonequilibrium Chromosome Looping via Molecular Slip Links

Author(s): C. A. Brackley, J. Johnson, D. Michieletto, A. N. Morozov, M. Nicodemi, P. R. Cook, and D. Marenduzzo

A nonequilibrium mechanism based on diffusive sliding of molecules that bind to DNA is proposed for loop formation in chromosomes.

[Phys. Rev. Lett. 119, 138101] Published Tue Sep 26, 2017

## Single-Electron and Single-Photon Sensitivity with a Silicon Skipper CCD

Author(s): Javier Tiffenberg, Miguel Sofo-Haro, Alex Drlica-Wagner, Rouven Essig, Yann Guardincerri, Steve Holland, Tomer Volansky, and Tien-Tien YuA CCD design relying on multiple charge measurements has achieved a precision that allows the detection …

## New Measurement of the Direct $3α$ Decay from the $^{12}\mathrm{C}$ Hoyle State

Author(s): R. Smith, Tz. Kokalova, C. Wheldon, J. E. Bishop, M. Freer, N. Curtis, and D. J. Parker

Two experiments provide the most precise picture to date of how an excited state of carbon decays into three helium nuclei.

[Phys. Rev. Lett. 119, 132502] Published Mon Sep 25, 2017

## High-Precision Probe of the Fully Sequential Decay Width of the Hoyle State in $^{12}\mathrm{C}$

Author(s): D. Dell’Aquila *et al.*

Two experiments provide the most precise picture to date of how an excited state of carbon decays into three helium nuclei.

[Phys. Rev. Lett. 119, 132501] Published Mon Sep 25, 2017

## Can Hail and Rain Nucleate Cloud Droplets?

Author(s): Prasanth Prabhakaran, Stephan Weiss, Alexei Krekhov, Alain Pumir, and Eberhard BodenschatzExperiments with a simplified version of the atmosphere show that falling drops seed many smaller droplets in their wake.[Phys. Rev. Lett. 119, 128701]…

## Low-Field-Triggered Large Magnetostriction in Iron-Palladium Strain Glass Alloys

Author(s): Shuai Ren, Dezhen Xue, Yuanchao Ji, Xiaolian Liu, Sen Yang, and Xiaobing RenFePd alloys exhibit a large magnetostriction at low fields, which can eventually lead to smaller magnetomechanical devices.[Phys. Rev. Lett. 119, 125701] Published F…

## Generalized Magnetic Mirrors

Author(s): Wei LiuMagnetic fields could be reflected in metamaterials using a mirror created from electrical resonances, rather than the normally used magnetic resonances.[Phys. Rev. Lett. 119, 123902] Published Thu Sep 21, 2017

## Emergence of Type-II Dirac Points in Graphynelike Photonic Lattices

Author(s): Georgios G. Pyrialakos, Nicholas S. Nye, Nikolaos V. Kantartzis, and Demetrios N. ChristodoulidesThe band structure of an all-dielectric, non-centrosymmetric photonic lattice is predicted to exhibit both type-I and type-II Dirac points.[Phys…

## Spontaneous Formation of Vector Vortex Beams in Vertical-Cavity Surface-Emitting Lasers with Feedback

Author(s): Jesus Jimenez-Garcia, Pedro Rodriguez, T. Guillet, and T. AckemannA simple laser setup has spontaneously produced nonuniform polarization patterns called vector vortices.[Phys. Rev. Lett. 119, 113902] Published Fri Sep 15, 2017

## Temperature Scaling Law for Quantum Annealing Optimizers

Author(s): Tameem Albash, Victor Martin-Mayor, and Itay Hen

Calculations show that quantum annealing—the quantum computing method used in a commercially available device—is hampered by thermal effects.

[Phys. Rev. Lett. 119, 110502] Published Thu Sep 14, 2017

## Self-Interacting Dark Matter Can Explain Diverse Galactic Rotation Curves

Author(s): Ayuki Kamada, Manoj Kaplinghat, Andrew B. Pace, and Hai-Bo Yu

Dark matter that interacts with itself provides a better description of the speeds of stars in galaxies than dark matter that doesn’t self-interact.

[Phys. Rev. Lett. 119, 111102] Published Wed Sep 13, 2017