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Physical Review Letters

Volume 117, Issue 12

16 September 2016
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On the Cover

The PandaX-II liquid xenon detector used for dark matter searches at the China Jin-Ping Underground Laboratory. Selected for an Editors’ Suggestion.

From the article:

Dark Matter Results from First 98.7 Days of Data from the PandaX-II Experiment
Andi Tan et al. (PandaX-II Collaboration)
Phys. Rev. Lett. 117, 121303 (2016)

HIGHLIGHTED ARTICLES

FEATURED IN PHYSICS
EDITORS' SUGGESTION

Direct Measurement of the Density Matrix of a Quantum System

G. S. Thekkadath, L. Giner, Y. Chalich, M. J. Horton, J. Banker, and J. S. Lundeen

Phys. Rev. Lett. 117, 120401 (2016) - Published 12 September, 2016

Researchers have developed a new technique to measure the density matrix—a more general way of characterizing the state of a quantum system than that provided by the wave function.

FEATURED IN PHYSICS
EDITORS' SUGGESTION

Dark Matter Results from First 98.7 Days of Data from the PandaX-II Experiment

Andi Tan et al. (PandaX-II Collaboration)

Phys. Rev. Lett. 117, 121303 (2016) - Published 16 September, 2016

The PandaX-II experiment reports results from their first full physics run in search of dark matter. They find none, and their data cut in half the existing upper limit on the scattering cross section for 40 GeV WIMPS.

FEATURED IN PHYSICS
EDITORS' SUGGESTION

Torsional Optomechanics of a Levitated Nonspherical Nanoparticle

Thai M. Hoang, Yue Ma, Jonghoon Ahn, Jaehoon Bang, F. Robicheaux, Zhang-Qi Yin, and Tongcang Li

Phys. Rev. Lett. 117, 123604 (2016) - Published 15 September, 2016

Researchers characterize the rotational jiggling of an optically levitated nanoparticle, showing how this motion could be cooled to its quantum ground state.

FEATURED IN PHYSICS
EDITORS' SUGGESTION

On-Chip Strong Coupling and Efficient Frequency Conversion between Telecom and Visible Optical Modes

Xiang Guo, Chang-Ling Zou, Hojoong Jung, and Hong X. Tang

Phys. Rev. Lett. 117, 123902 (2016) - Published 16 September, 2016

A new device that can potentially be scaled up for quantum computing converts visible light to infrared light suitable for fiber-optic transmission without destroying the light’s quantum state.

FEATURED IN PHYSICS

Detectability of Light Dark Matter with Superfluid Helium

Katelin Schutz and Kathryn M. Zurek

Phys. Rev. Lett. 117, 121302 (2016) - Published 14 September, 2016

Superconducting aluminum or superfluid helium could be used to detect superlight dark matter particles.

FEATURED IN PHYSICS

Anomalous Dynamical Behavior of Freestanding Graphene Membranes

M. L. Ackerman, P. Kumar, M. Neek-Amal, P. M. Thibado, F. M. Peeters, and Surendra Singh

Phys. Rev. Lett. 117, 126801 (2016) - Published 13 September, 2016

The random quivering of graphene membranes could be exploited to generate electricity.

EDITORS' SUGGESTION

Dense Axion Stars

Eric Braaten, Abhishek Mohapatra, and Hong Zhang

Phys. Rev. Lett. 117, 121801 (2016) - Published 16 September, 2016

Axions, if they make up the dark mater, could form dense stars balanced by gravity and the mean-field pressure of the axion Bose-Einstein condensate.

EDITORS' SUGGESTION

High-Brightness High-Energy Electron Beams from a Laser Wakefield Accelerator via Energy Chirp Control

W. T. Wang, W. T. Li, J. S. Liu, Z. J. Zhang, R. Qi, C. H. Yu, J. Q. Liu, M. Fang, Z. Y. Qin, C. Wang, Y. Xu, F. X. Wu, Y. X. Leng, R. X. Li, and Z. Z. Xu

Phys. Rev. Lett. 117, 124801 (2016) - Published 16 September, 2016

Using a new two-stage acceleration scheme, where electron injection and seeding are controlled in different periods of the laser wakefield, high-quality tunable electron beams are produced with brightnesses close to those achieved in state-of-the-art linac drivers.

EDITORS' SUGGESTION

Giant Rashba Splitting in CH3NH3PbBr3 Organic-Inorganic Perovskite

Daniel Niesner, Max Wilhelm, Ievgen Levchuk, Andres Osvet, Shreetu Shrestha, Miroslaw Batentschuk, Christoph Brabec, and Thomas Fauster

Phys. Rev. Lett. 117, 126401 (2016) - Published 13 September, 2016

The alignment of spins in an organic-inorganic perovskite semiconductor is directly observed via photoemission spectroscopy allowing the spin to be tracked as it moved through the material.

EDITORS' SUGGESTION

Observation of the Quantum Anomalous Hall Insulator to Anderson Insulator Quantum Phase Transition and its Scaling Behavior

Cui-Zu Chang, Weiwei Zhao, Jian Li, J. K. Jain, Chaoxing Liu, Jagadeesh S. Moodera, and Moses H. W. Chan

Phys. Rev. Lett. 117, 126802 (2016) - Published 14 September, 2016

A quantum phase transition between two insulating phases of a magnetic topological insulator is observed experimentally by tuning the material’s chemical potential.

LETTERS

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

FEATURED IN PHYSICS
EDITORS' SUGGESTION

Direct Measurement of the Density Matrix of a Quantum System

G. S. Thekkadath, L. Giner, Y. Chalich, M. J. Horton, J. Banker, and J. S. Lundeen

Phys. Rev. Lett. 117, 120401 (2016) - Published 12 September, 2016

Researchers have developed a new technique to measure the density matrix—a more general way of characterizing the state of a quantum system than that provided by the wave function.

Accessing Many-Body Localized States through the Generalized Gibbs Ensemble

Stephen Inglis and Lode Pollet

Phys. Rev. Lett. 117, 120402 (2016) - Published 13 September, 2016

Noise Threshold and Resource Cost of Fault-Tolerant Quantum Computing with Majorana Fermions in Hybrid Systems

Ying Li

Phys. Rev. Lett. 117, 120403 (2016) - Published 14 September, 2016

Quasiprobability Representations of Quantum Mechanics with Minimal Negativity

Huangjun Zhu

Phys. Rev. Lett. 117, 120404 (2016) - Published 14 September, 2016

Grover Search and the No-Signaling Principle

Ning Bao, Adam Bouland, and Stephen P. Jordan

Phys. Rev. Lett. 117, 120501 (2016) - Published 14 September, 2016

Gravitation and Astrophysics

Observation of Noise Correlated by the Hawking Effect in a Water Tank

L.-P. Euvé, F. Michel, R. Parentani, T. G. Philbin, and G. Rousseaux

Phys. Rev. Lett. 117, 121301 (2016) - Published 13 September, 2016

FEATURED IN PHYSICS

Detectability of Light Dark Matter with Superfluid Helium

Katelin Schutz and Kathryn M. Zurek

Phys. Rev. Lett. 117, 121302 (2016) - Published 14 September, 2016

Superconducting aluminum or superfluid helium could be used to detect superlight dark matter particles.

FEATURED IN PHYSICS
EDITORS' SUGGESTION

Dark Matter Results from First 98.7 Days of Data from the PandaX-II Experiment

Andi Tan et al. (PandaX-II Collaboration)

Phys. Rev. Lett. 117, 121303 (2016) - Published 16 September, 2016

The PandaX-II experiment reports results from their first full physics run in search of dark matter. They find none, and their data cut in half the existing upper limit on the scattering cross section for 40 GeV WIMPS.

Classically Stable Nonsingular Cosmological Bounces

Anna Ijjas and Paul J. Steinhardt

Phys. Rev. Lett. 117, 121304 (2016) - Published 16 September, 2016

Elementary Particles and Fields

Matrix Product Approximations to Multipoint Functions in Two-Dimensional Conformal Field Theory

Robert König and Volkher B. Scholz

Phys. Rev. Lett. 117, 121601 (2016) - Published 14 September, 2016

EDITORS' SUGGESTION

Dense Axion Stars

Eric Braaten, Abhishek Mohapatra, and Hong Zhang

Phys. Rev. Lett. 117, 121801 (2016) - Published 16 September, 2016

Axions, if they make up the dark mater, could form dense stars balanced by gravity and the mean-field pressure of the axion Bose-Einstein condensate.

Two-Flavor Simulations of ρ(770) and the Role of the KK¯ Channel

B. Hu, R. Molina, M. Döring, and A. Alexandru

Phys. Rev. Lett. 117, 122001 (2016) - Published 15 September, 2016

Atomic, Molecular, and Optical Physics

Formation of CN−, C3N−, and C5N− Molecules by Radiative Electron Attachment and their Destruction by Photodetachment

Marjan Khamesian, Nicolas Douguet, Samantha Fonseca dos Santos, Olivier Dulieu, Maurice Raoult, Will J. Brigg, and Viatcheslav Kokoouline

Phys. Rev. Lett. 117, 123001 (2016) - Published 13 September, 2016

Rydberg Molecule-Induced Remote Spin Flips

Thomas Niederprüm, Oliver Thomas, Tanita Eichert, and Herwig Ott

Phys. Rev. Lett. 117, 123002 (2016) - Published 16 September, 2016

Coherence Preservation of a Single Neutral Atom Qubit Transferred between Magic-Intensity Optical Traps

Jiaheng Yang, Xiaodong He, Ruijun Guo, Peng Xu, Kunpeng Wang, Cheng Sheng, Min Liu, Jin Wang, Andrei Derevianko, and Mingsheng Zhan

Phys. Rev. Lett. 117, 123201 (2016) - Published 14 September, 2016

Observation of Parity-Time Symmetry in Optically Induced Atomic Lattices

Zhaoyang Zhang, Yiqi Zhang, Jiteng Sheng, Liu Yang, Mohammad-Ali Miri, Demetrios N. Christodoulides, Bing He, Yanpeng Zhang, and Min Xiao

Phys. Rev. Lett. 117, 123601 (2016) - Published 13 September, 2016

Quantum Phase Transition in the Finite Jaynes-Cummings Lattice Systems

Myung-Joong Hwang and Martin B. Plenio

Phys. Rev. Lett. 117, 123602 (2016) - Published 13 September, 2016

Multimode Strong Coupling in Superconducting Cavity Piezoelectromechanics

Xu Han, Chang-Ling Zou, and Hong X. Tang

Phys. Rev. Lett. 117, 123603 (2016) - Published 14 September, 2016

FEATURED IN PHYSICS
EDITORS' SUGGESTION

Torsional Optomechanics of a Levitated Nonspherical Nanoparticle

Thai M. Hoang, Yue Ma, Jonghoon Ahn, Jaehoon Bang, F. Robicheaux, Zhang-Qi Yin, and Tongcang Li

Phys. Rev. Lett. 117, 123604 (2016) - Published 15 September, 2016

Researchers characterize the rotational jiggling of an optically levitated nanoparticle, showing how this motion could be cooled to its quantum ground state.

Optomagnonic Whispering Gallery Microresonators

Xufeng Zhang, Na Zhu, Chang-Ling Zou, and Hong X. Tang

Phys. Rev. Lett. 117, 123605 (2016) - Published 16 September, 2016

Nonlinear Dynamics, Fluid Dynamics, Classical Optics, etc.

Generation of Photon-Plasmon Quantum States in Nonlinear Hyperbolic Metamaterials

Alexander N. Poddubny, Ivan V. Iorsh, and Andrey A. Sukhorukov

Phys. Rev. Lett. 117, 123901 (2016) - Published 13 September, 2016

FEATURED IN PHYSICS
EDITORS' SUGGESTION

On-Chip Strong Coupling and Efficient Frequency Conversion between Telecom and Visible Optical Modes

Xiang Guo, Chang-Ling Zou, Hojoong Jung, and Hong X. Tang

Phys. Rev. Lett. 117, 123902 (2016) - Published 16 September, 2016

A new device that can potentially be scaled up for quantum computing converts visible light to infrared light suitable for fiber-optic transmission without destroying the light’s quantum state.

Compton Scattered X-Gamma Rays with Orbital Momentum

V. Petrillo, G. Dattoli, I. Drebot, and F. Nguyen

Phys. Rev. Lett. 117, 123903 (2016) - Published 16 September, 2016

Nonlinear Plasmonic Sensing with Nanographene

Renwen Yu, Joel D. Cox, and F. Javier García de Abajo

Phys. Rev. Lett. 117, 123904 (2016) - Published 16 September, 2016

Internal Stresses Lead to Net Forces and Torques on Extended Elastic Bodies

Hillel Aharoni, John M. Kolinski, Michael Moshe, Idan Meirzada, and Eran Sharon

Phys. Rev. Lett. 117, 124101 (2016) - Published 16 September, 2016

Plasma and Beam Physics

EDITORS' SUGGESTION

High-Brightness High-Energy Electron Beams from a Laser Wakefield Accelerator via Energy Chirp Control

W. T. Wang, W. T. Li, J. S. Liu, Z. J. Zhang, R. Qi, C. H. Yu, J. Q. Liu, M. Fang, Z. Y. Qin, C. Wang, Y. Xu, F. X. Wu, Y. X. Leng, R. X. Li, and Z. Z. Xu

Phys. Rev. Lett. 117, 124801 (2016) - Published 16 September, 2016

Using a new two-stage acceleration scheme, where electron injection and seeding are controlled in different periods of the laser wakefield, high-quality tunable electron beams are produced with brightnesses close to those achieved in state-of-the-art linac drivers.

Waveform-Controlled Relativistic High-Order-Harmonic Generation

Matthew R. Edwards and Julia M. Mikhailova

Phys. Rev. Lett. 117, 125001 (2016) - Published 16 September, 2016

Zonal Flow Patterns: How Toroidal Coupling Induces Phase Jumps and Shear Layers

Z. B. Guo and P. H. Diamond

Phys. Rev. Lett. 117, 125002 (2016) - Published 16 September, 2016

Condensed Matter: Structure, etc.

Tricriticalities and Quantum Phases in Spin-Orbit-Coupled Spin-1 Bose Gases

Giovanni I. Martone, Francesco V. Pepe, Paolo Facchi, Saverio Pascazio, and Sandro Stringari

Phys. Rev. Lett. 117, 125301 (2016) - Published 16 September, 2016

Tuning the Fabrication of Nanostructures by Low-Energy Highly Charged Ions

Ayman S. El-Said, Richard A. Wilhelm, Rene Heller, Michael Sorokin, Stefan Facsko, and Friedrich Aumayr

Phys. Rev. Lett. 117, 126101 (2016) - Published 13 September, 2016

Condensed Matter: Electronic Properties, etc.

EDITORS' SUGGESTION

Giant Rashba Splitting in CH3NH3PbBr3 Organic-Inorganic Perovskite

Daniel Niesner, Max Wilhelm, Ievgen Levchuk, Andres Osvet, Shreetu Shrestha, Miroslaw Batentschuk, Christoph Brabec, and Thomas Fauster

Phys. Rev. Lett. 117, 126401 (2016) - Published 13 September, 2016

The alignment of spins in an organic-inorganic perovskite semiconductor is directly observed via photoemission spectroscopy allowing the spin to be tracked as it moved through the material.

Carrier-Multiplication-Induced Structural Change during Ultrafast Carrier Relaxation and Nonthermal Phase Transition in Semiconductors

Junhyeok Bang, Y. Y. Sun, X.-Q. Liu, F. Gao, and S. B. Zhang

Phys. Rev. Lett. 117, 126402 (2016) - Published 13 September, 2016

Jeff Description of the Honeycomb Mott Insulator α−RuCl3

A. Koitzsch, C. Habenicht, E. Müller, M. Knupfer, B. Büchner, H. C. Kandpal, J. van den Brink, D. Nowak, A. Isaeva, and Th. Doert

Phys. Rev. Lett. 117, 126403 (2016) - Published 16 September, 2016

FEATURED IN PHYSICS

Anomalous Dynamical Behavior of Freestanding Graphene Membranes

M. L. Ackerman, P. Kumar, M. Neek-Amal, P. M. Thibado, F. M. Peeters, and Surendra Singh

Phys. Rev. Lett. 117, 126801 (2016) - Published 13 September, 2016

The random quivering of graphene membranes could be exploited to generate electricity.

EDITORS' SUGGESTION

Observation of the Quantum Anomalous Hall Insulator to Anderson Insulator Quantum Phase Transition and its Scaling Behavior

Cui-Zu Chang, Weiwei Zhao, Jian Li, J. K. Jain, Chaoxing Liu, Jagadeesh S. Moodera, and Moses H. W. Chan

Phys. Rev. Lett. 117, 126802 (2016) - Published 14 September, 2016

A quantum phase transition between two insulating phases of a magnetic topological insulator is observed experimentally by tuning the material’s chemical potential.

Dynamical Buildup of a Quantized Hall Response from Nontopological States

Ying Hu, Peter Zoller, and Jan Carl Budich

Phys. Rev. Lett. 117, 126803 (2016) - Published 16 September, 2016

Transition from Strong to Weak Electronic Coupling in a Single-Molecule Junction

R. Frisenda and H. S. J. van der Zant

Phys. Rev. Lett. 117, 126804 (2016) - Published 16 September, 2016

Origin of the Resistivity Anisotropy in the Nematic Phase of FeSe

M. A. Tanatar, A. E. Böhmer, E. I. Timmons, M. Schütt, G. Drachuck, V. Taufour, K. Kothapalli, A. Kreyssig, S. L. Bud’ko, P. C. Canfield, R. M. Fernandes, and R. Prozorov

Phys. Rev. Lett. 117, 127001 (2016) - Published 16 September, 2016

Relaxation of a Classical Spin Coupled to a Strongly Correlated Electron System

Mohammad Sayad, Roman Rausch, and Michael Potthoff

Phys. Rev. Lett. 117, 127201 (2016) - Published 13 September, 2016

Large Unidirectional Magnetoresistance in a Magnetic Topological Insulator

K. Yasuda, A. Tsukazaki, R. Yoshimi, K. S. Takahashi, M. Kawasaki, and Y. Tokura

Phys. Rev. Lett. 117, 127202 (2016) - Published 14 September, 2016

Resonant Inelastic X-Ray Scattering Response of the Kitaev Honeycomb Model

Gábor B. Halász, Natalia B. Perkins, and Jeroen van den Brink

Phys. Rev. Lett. 117, 127203 (2016) - Published 16 September, 2016

Compensated Semimetal LaSb with Unsaturated Magnetoresistance

L.-K. Zeng et al.

Phys. Rev. Lett. 117, 127204 (2016) - Published 16 September, 2016

Observation of the Transition from Lasing Driven by a Bosonic to a Fermionic Reservoir in a GaAs Quantum Well Microcavity

S. Brodbeck, H. Suchomel, M. Amthor, T. Steinl, M. Kamp, C. Schneider, and S. Höfling

Phys. Rev. Lett. 117, 127401 (2016) - Published 16 September, 2016

Polymer, Soft Matter, Biological, Climate, and Interdisciplinary Physics

Rotator-to-Lamellar Phase Transition in Janus Colloids Driven by Pressure Anisotropy

Hossein Rezvantalab, Daniel J. Beltran-Villegas, and Ronald G. Larson

Phys. Rev. Lett. 117, 128001 (2016) - Published 16 September, 2016

Stochastic Kinetics of Nascent RNA

Heng Xu, Samuel O. Skinner, Anna Marie Sokac, and Ido Golding

Phys. Rev. Lett. 117, 128101 (2016) - Published 13 September, 2016

Embodiment of Learning in Electro-Optical Signal Processors

Michiel Hermans, Piotr Antonik, Marc Haelterman, and Serge Massar

Phys. Rev. Lett. 117, 128301 (2016) - Published 16 September, 2016

ERRATA

Erratum: Topological Optical Waveguiding in Silicon and the Transition between Topological and Trivial Defect States [Phys. Rev. Lett. 116, 163901 (2016)]

Andrea Blanco-Redondo, Imanol Andonegui, Matthew J. Collins, Gal Harari, Yaakov Lumer, Mikael C. Rechtsman, Benjamin J. Eggleton, and Mordechai Segev

Phys. Rev. Lett. 117, 129901 (2016) - Published 13 September, 2016

Erratum: Compression-Driven Mass Flow in Bulk Solid He4 [Phys. Rev. Lett. 117, 025301 (2016)]

Zhi Gang Cheng and John Beamish

Phys. Rev. Lett. 117, 129902 (2016) - Published 16 September, 2016

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