Volume 117, Issue 25

16 December 2016

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On the Cover

Dust continuum emission of a protoplanetary disk recorded in sub-mm wavelengths at 0.2 arcsec resolution. Evidence suggests the two outer dark rings are due to Saturn-sized baby planets. Selected for a Viewpoint in Physics and an Editors’ Suggestion.

From the article:

Ringed Structures of the HD 163296 Protoplanetary Disk Revealed by ALMA
Andrea Isella, Greta Guidi, Leonardo Testi, Shangfei Liu, Hui Li, Shengtai Li, Erik Weaver, Yann Boehler, John M. Carperter, Itziar De Gregorio-Monsalvo, Carlo F. Manara, Antonella Natta, Laura M. Pérez, Luca Ricci, Anneila Sargent, Marco Tazzari, and Neal Turner
Phys. Rev. Lett. 117, 251101 (2016)

HIGHLIGHTED ARTICLES

FEATURED IN PHYSICS

EDITORS' SUGGESTION

Ringed Structures of the HD 163296 Protoplanetary Disk Revealed by ALMA

Andrea Isella, Greta Guidi, Leonardo Testi, Shangfei Liu, Hui Li, Shengtai Li, Erik Weaver, Yann Boehler, John M. Carperter, Itziar De Gregorio-Monsalvo, Carlo F. Manara, Antonella Natta, Laura M. Pérez, Luca Ricci, Anneila Sargent, Marco Tazzari, and Neal Turner

Phys. Rev. Lett. 117, 251101 (2016) - Published 12 December, 2016

Images of gaps in the dust and gas around a young star provide the best evidence to date that these gaps host newly formed planets.

FEATURED IN PHYSICS

EDITORS' SUGGESTION

Molecular Fountain

Cunfeng Cheng, Aernout P. P. van der Poel, Paul Jansen, Marina Quintero-Pérez, Thomas E. Wall, Wim Ubachs, and Hendrick L. Bethlem

Phys. Rev. Lett. 117, 253201 (2016) - Published 13 December, 2016

Gas molecules can be slowed down, cooled, and made to erupt like a fountain using electric fields, enabling their study over unprecedentedly long time scales.

FEATURED IN PHYSICS

EDITORS' SUGGESTION

Observation of Half-Quantum Vortices in Topological Superfluid ${}^{3}{He}$

S. Autti, V. V. Dmitriev, J. T. Mäkinen, A. A. Soldatov, G. E. Volovik, A. N. Yudin, V. V. Zavjalov, and V. B. Eltsov

Phys. Rev. Lett. 117, 255301 (2016) - Published 14 December, 2016

Researchers working with superfluid helium in a porous medium have generated vortices with half the quantum unit of fluid flow.

FEATURED IN PHYSICS

EDITORS' SUGGESTION

Linear Magnetoresistance in a Quasifree Two-Dimensional Electron Gas in an Ultrahigh Mobility GaAs Quantum Well

T. Khouri, U. Zeitler, C. Reichl, W. Wegscheider, N. E. Hussey, S. Wiedmann, and J. C. Maan

Phys. Rev. Lett. 117, 256601 (2016) - Published 14 December, 2016

Charge density variations may be behind an unusual magnetic response seen in topological insulators and other novel materials.

FEATURED IN PHYSICS

Direct Measurement of the Critical Pore Size in a Model Membrane

Mark Ilton, Christian DiMaria, and Kari Dalnoki-Veress

Phys. Rev. Lett. 117, 257801 (2016) - Published 16 December, 2016

Pores in a polymer film are observed to evolve in size depending on their initial radius.

EDITORS' SUGGESTION

Einstein-Podolsky-Rosen Entanglement of Narrow-Band Photons from Cold Atoms

Jong-Chan Lee, Kwang-Kyoon Park, Tian-Ming Zhao, and Yoon-Ho Kim

Phys. Rev. Lett. 117, 250501 (2016) - Published 13 December, 2016

Position-momentum entanglement is achieved in narrowband photons generated from cold atoms via spontaneous four-wave mixing.

EDITORS' SUGGESTION

Experimental Demonstration of a Resonator-Induced Phase Gate in a Multiqubit Circuit-QED System

Hanhee Paik, A. Mezzacapo, Martin Sandberg, D. T. McClure, B. Abdo, A. D. Córcoles, O. Dial, D. F. Bogorin, B. L. T. Plourde, M. Steffen, A. W. Cross, J. M. Gambetta, and Jerry M. Chow

Phys. Rev. Lett. 117, 250502 (2016) - Published 13 December, 2016

A quantum phase gate that reduces the need for frequency matching is implemented using four superconducting qubits in a three-dimensional architecture, overcoming a scaling hurdle for these devices.

EDITORS' SUGGESTION

Solving the Hierarchy Problem at Reheating with a Large Number of Degrees of Freedom

Nima Arkani-Hamed, Timothy Cohen, Raffaele Tito D’Agnolo, Anson Hook, Hyung Do Kim, and David Pinner

Phys. Rev. Lett. 117, 251801 (2016) - Published 15 December, 2016

A new approach to solve the hierarchy problem—that the electroweak and Planck scales differ by 17 orders of magnitude—invokes a large number of copies of the Standard Model.

EDITORS' SUGGESTION

Tunable Ultrafast Thermal Relaxation in Graphene Measured by Continuous-Wave Photomixing

M. Mehdi Jadidi, Ryan J. Suess, Cheng Tan, Xinghan Cai, Kenji Watanabe, Takashi Taniguchi, Andrei B. Sushkov, Martin Mittendorff, James Hone, H. Dennis Drew, Michael S. Fuhrer, and Thomas E. Murphy

Phys. Rev. Lett. 117, 257401 (2016) - Published 13 December, 2016

The speed and nonlinearity of hot electrons in graphene are measured with high sensitivity via photocurrent spectroscopy, revealing the cooling mechanisms of these electrons.

EDITORS' SUGGESTION

Diffusiophoretic Focusing of Suspended Colloids

Nan Shi, Rodrigo Nery-Azevedo, Amr I. Abdel-Fattah, and Todd M. Squires

Phys. Rev. Lett. 117, 258001 (2016) - Published 15 December, 2016

A new microfluidic device enables the study of diffusiophoresis—migration of colloids in response to concentration gradients in the fluid—when both salt and pH gradients are present.

EDITORS' SUGGESTION

Role of Entropy in the Expulsion of Dopants from Optically Trapped Colloidal Assemblies

Hreedish Kakoty, Rajarshi Banerjee, Chandan Dasgupta, and Ambarish Ghosh

Phys. Rev. Lett. 117, 258002 (2016) - Published 16 December, 2016

Colloidal clusters can both expel or internalize particles that differ in shape or size from those in the cluster, with the fate of the dopant depending on the entropy of the system.

LETTERS

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

Driven Open Quantum Systems and Floquet Stroboscopic Dynamics

S. Restrepo, J. Cerrillo, V. M. Bastidas, D. G. Angelakis, and T. Brandes

Phys. Rev. Lett. 117, 250401 (2016) - Published 16 December, 2016

EDITORS' SUGGESTION

Einstein-Podolsky-Rosen Entanglement of Narrow-Band Photons from Cold Atoms

Jong-Chan Lee, Kwang-Kyoon Park, Tian-Ming Zhao, and Yoon-Ho Kim

Phys. Rev. Lett. 117, 250501 (2016) - Published 13 December, 2016

Position-momentum entanglement is achieved in narrowband photons generated from cold atoms via spontaneous four-wave mixing.

EDITORS' SUGGESTION

Experimental Demonstration of a Resonator-Induced Phase Gate in a Multiqubit Circuit-QED System

Hanhee Paik, A. Mezzacapo, Martin Sandberg, D. T. McClure, B. Abdo, A. D. Córcoles, O. Dial, D. F. Bogorin, B. L. T. Plourde, M. Steffen, A. W. Cross, J. M. Gambetta, and Jerry M. Chow

Phys. Rev. Lett. 117, 250502 (2016) - Published 13 December, 2016

A quantum phase gate that reduces the need for frequency matching is implemented using four superconducting qubits in a three-dimensional architecture, overcoming a scaling hurdle for these devices.

Covert Quantum Communication

Juan Miguel Arrazola and Valerio Scarani

Phys. Rev. Lett. 117, 250503 (2016) - Published 15 December, 2016

Ultranarrow Optical Inhomogeneous Linewidth in a Stoichiometric Rare-Earth Crystal

R. L. Ahlefeldt, M. R. Hush, and M. J. Sellars

Phys. Rev. Lett. 117, 250504 (2016) - Published 15 December, 2016

Insecurity of Detector-Device-Independent Quantum Key Distribution

Shihan Sajeed, Anqi Huang, Shihai Sun, Feihu Xu, Vadim Makarov, and Marcos Curty

Phys. Rev. Lett. 117, 250505 (2016) - Published 16 December, 2016

Gravitation and Astrophysics

FEATURED IN PHYSICS

EDITORS' SUGGESTION

Ringed Structures of the HD 163296 Protoplanetary Disk Revealed by ALMA

Phys. Rev. Lett. 117, 251101 (2016) - Published 12 December, 2016

Images of gaps in the dust and gas around a young star provide the best evidence to date that these gaps host newly formed planets.

Elementary Particles and Fields

New Solutions for Non-Abelian Cosmic Strings

Mark Hindmarsh, Kari Rummukainen, and David J. Weir

Phys. Rev. Lett. 117, 251601 (2016) - Published 14 December, 2016

Integrable Deformations of $T$ -Dual $σ$ Models

Riccardo Borsato and Linus Wulff

Phys. Rev. Lett. 117, 251602 (2016) - Published 16 December, 2016

EDITORS' SUGGESTION

Solving the Hierarchy Problem at Reheating with a Large Number of Degrees of Freedom

Nima Arkani-Hamed, Timothy Cohen, Raffaele Tito D’Agnolo, Anson Hook, Hyung Do Kim, and David Pinner

Phys. Rev. Lett. 117, 251801 (2016) - Published 15 December, 2016

A new approach to solve the hierarchy problem—that the electroweak and Planck scales differ by 17 orders of magnitude—invokes a large number of copies of the Standard Model.

Nuclear Physics

Charge Radii of Neutron Deficient ${}^{52, 53}{Fe}$ Produced by Projectile Fragmentation

K. Minamisono, D. M. Rossi, R. Beerwerth, S. Fritzsche, D. Garand, A. Klose, Y. Liu, B. Maaß, P. F. Mantica, A. J. Miller, P. Müller, W. Nazarewicz, W. Nörtershäuser, E. Olsen, M. R. Pearson, P.-G. Reinhard, E. E. Saperstein, C. Sumithrarachchi, and S. V. Tolokonnikov

Phys. Rev. Lett. 117, 252501 (2016) - Published 15 December, 2016

Atomic, Molecular, and Optical Physics

Quantum Electrodynamical Shifts in Multivalent Heavy Ions

I. I. Tupitsyn, M. G. Kozlov, M. S. Safronova, V. M. Shabaev, and V. A. Dzuba

Phys. Rev. Lett. 117, 253001 (2016) - Published 16 December, 2016

FEATURED IN PHYSICS

EDITORS' SUGGESTION

Molecular Fountain

Cunfeng Cheng, Aernout P. P. van der Poel, Paul Jansen, Marina Quintero-Pérez, Thomas E. Wall, Wim Ubachs, and Hendrick L. Bethlem

Phys. Rev. Lett. 117, 253201 (2016) - Published 13 December, 2016

Gas molecules can be slowed down, cooled, and made to erupt like a fountain using electric fields, enabling their study over unprecedentedly long time scales.

High-Resolution Measurements of $e^{+} + H_{2} O$ Total Cross Section

A. Loreti, R. Kadokura, S. E. Fayer, Á. Kövér, and G. Laricchia

Phys. Rev. Lett. 117, 253401 (2016) - Published 16 December, 2016

Superresolving Imaging of Arbitrary One-Dimensional Arrays of Thermal Light Sources Using Multiphoton Interference

Anton Classen, Felix Waldmann, Sebastian Giebel, Raimund Schneider, Daniel Bhatti, Thomas Mehringer, and Joachim von Zanthier

Phys. Rev. Lett. 117, 253601 (2016) - Published 15 December, 2016

Inelastic Photon Scattering via the Intracavity Rydberg Blockade

A. Grankin, E. Brion, R. Boddeda, S. Ćuk, I. Usmani, A. Ourjoumtsev, and P. Grangier

Phys. Rev. Lett. 117, 253602 (2016) - Published 16 December, 2016

Nonlinear Dynamics, Fluid Dynamics, Classical Optics, etc.

Chaotic Griffiths Phase with Anomalous Lyapunov Spectra in Coupled Map Networks

Kenji Shinoda and Kunihiko Kaneko

Phys. Rev. Lett. 117, 254101 (2016) - Published 16 December, 2016

Condensed Matter: Structure, etc.

FEATURED IN PHYSICS

EDITORS' SUGGESTION

Observation of Half-Quantum Vortices in Topological Superfluid ${}^{3}{He}$

S. Autti, V. V. Dmitriev, J. T. Mäkinen, A. A. Soldatov, G. E. Volovik, A. N. Yudin, V. V. Zavjalov, and V. B. Eltsov

Phys. Rev. Lett. 117, 255301 (2016) - Published 14 December, 2016

Researchers working with superfluid helium in a porous medium have generated vortices with half the quantum unit of fluid flow.

Anomalous Conductances in an Ultracold Quantum Wire

M. Kanász-Nagy, L. Glazman, T. Esslinger, and E. A. Demler

Phys. Rev. Lett. 117, 255302 (2016) - Published 16 December, 2016

Electron-Beam Mapping of Vibrational Modes with Nanometer Spatial Resolution

C. Dwyer, T. Aoki, P. Rez, S. L. Y. Chang, T. C. Lovejoy, and O. L. Krivanek

Phys. Rev. Lett. 117, 256101 (2016) - Published 15 December, 2016

Nanoscale Structure of the Oil-Water Interface

M. Fukuto, B. M. Ocko, D. J. Bonthuis, R. R. Netz, H.-G. Steinrück, D. Pontoni, I. Kuzmenko, J. Haddad, and M. Deutsch

Phys. Rev. Lett. 117, 256102 (2016) - Published 15 December, 2016

Synthesis of Passive Lossless Metasurfaces Using Auxiliary Fields for Reflectionless Beam Splitting and Perfect Reflection

Ariel Epstein and George V. Eleftheriades

Phys. Rev. Lett. 117, 256103 (2016) - Published 16 December, 2016

Condensed Matter: Electronic Properties, etc.

FEATURED IN PHYSICS

EDITORS' SUGGESTION

Linear Magnetoresistance in a Quasifree Two-Dimensional Electron Gas in an Ultrahigh Mobility GaAs Quantum Well

T. Khouri, U. Zeitler, C. Reichl, W. Wegscheider, N. E. Hussey, S. Wiedmann, and J. C. Maan

Phys. Rev. Lett. 117, 256601 (2016) - Published 14 December, 2016

Charge density variations may be behind an unusual magnetic response seen in topological insulators and other novel materials.

Probing the Pairing Interaction and Multiple Bardasis-Schrieffer Modes Using Raman Spectroscopy

S. Maiti, T. A. Maier, T. Böhm, R. Hackl, and P. J. Hirschfeld

Phys. Rev. Lett. 117, 257001 (2016) - Published 15 December, 2016

Unconventional Disorder Effects in Correlated Superconductors

Maria N. Gastiasoro, Fabio Bernardini, and Brian M. Andersen

Phys. Rev. Lett. 117, 257002 (2016) - Published 15 December, 2016

Suppression of Superfluid Density and the Pseudogap State in the Cuprates by Impurities

Unurbat Erdenemunkh, Brian Koopman, Ling Fu, Kamalesh Chatterjee, W. D. Wise, G. D. Gu, E. W. Hudson, and Michael C. Boyer

Phys. Rev. Lett. 117, 257003 (2016) - Published 16 December, 2016

Flux States and Topological Phases from Spontaneous Time-Reversal Symmetry Breaking in $CrSi (Ge) {Te}_{3}$ -Based Systems

Jianpeng Liu, Se Young Park, Kevin F. Garrity, and David Vanderbilt

Phys. Rev. Lett. 117, 257201 (2016) - Published 15 December, 2016

EDITORS' SUGGESTION

Tunable Ultrafast Thermal Relaxation in Graphene Measured by Continuous-Wave Photomixing

M. Mehdi Jadidi, Ryan J. Suess, Cheng Tan, Xinghan Cai, Kenji Watanabe, Takashi Taniguchi, Andrei B. Sushkov, Martin Mittendorff, James Hone, H. Dennis Drew, Michael S. Fuhrer, and Thomas E. Murphy

Phys. Rev. Lett. 117, 257401 (2016) - Published 13 December, 2016

The speed and nonlinearity of hot electrons in graphene are measured with high sensitivity via photocurrent spectroscopy, revealing the cooling mechanisms of these electrons.

Long-Lived Valley Polarization of Intravalley Trions in Monolayer ${WSe}_{2}$

Akshay Singh, Kha Tran, Mirco Kolarczik, Joe Seifert, Yiping Wang, Kai Hao, Dennis Pleskot, Nathaniel M. Gabor, Sophia Helmrich, Nina Owschimikow, Ulrike Woggon, and Xiaoqin Li

Phys. Rev. Lett. 117, 257402 (2016) - Published 16 December, 2016

Dynamical Piezoelectric and Magnetopiezoelectric Effects in Polar Metals from Berry Phases and Orbital Moments

Dániel Varjas, Adolfo G. Grushin, Roni Ilan, and Joel E. Moore

Phys. Rev. Lett. 117, 257601 (2016) - Published 16 December, 2016

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

FEATURED IN PHYSICS

Direct Measurement of the Critical Pore Size in a Model Membrane

Mark Ilton, Christian DiMaria, and Kari Dalnoki-Veress

Phys. Rev. Lett. 117, 257801 (2016) - Published 16 December, 2016

Pores in a polymer film are observed to evolve in size depending on their initial radius.

EDITORS' SUGGESTION

Diffusiophoretic Focusing of Suspended Colloids

Nan Shi, Rodrigo Nery-Azevedo, Amr I. Abdel-Fattah, and Todd M. Squires

Phys. Rev. Lett. 117, 258001 (2016) - Published 15 December, 2016

A new microfluidic device enables the study of diffusiophoresis—migration of colloids in response to concentration gradients in the fluid—when both salt and pH gradients are present.

EDITORS' SUGGESTION

Role of Entropy in the Expulsion of Dopants from Optically Trapped Colloidal Assemblies

Hreedish Kakoty, Rajarshi Banerjee, Chandan Dasgupta, and Ambarish Ghosh

Phys. Rev. Lett. 117, 258002 (2016) - Published 16 December, 2016

Colloidal clusters can both expel or internalize particles that differ in shape or size from those in the cluster, with the fate of the dopant depending on the entropy of the system.

Load Response of the Flagellar Beat

Gary S. Klindt, Christian Ruloff, Christian Wagner, and Benjamin M. Friedrich

Phys. Rev. Lett. 117, 258101 (2016) - Published 14 December, 2016

ERRATA

Erratum: Electron Localization in Dissociating $H_{2}^{+}$ by Retroaction of a Photoelectron onto Its Source [Phys. Rev. Lett. 116, 043001 (2016)]

M. Waitz, D. Aslitürk, N. Wechselberger, H. K. Gill, J. Rist, F. Wiegandt, C. Goihl, G. Kastirke, M. Weller, T. Bauer, D. Metz, F. P. Sturm, J. Voigtsberger, S. Zeller, F. Trinter, G. Schiwietz, T. Weber, J. B. Williams, M. S. Schöffler, L. Ph. H. Schmidt, T. Jahnke, and R. Dörner

Phys. Rev. Lett. 117, 259901 (2016) - Published 15 December, 2016

Publisher’s Note: Effects of Lifshitz Transitions on Charge Transport in Magnetic Phases of Fe-Based Superconductors [Phys. Rev. Lett. 114, 097003 (2015)]

Y. Wang, Maria N. Gastiasoro, Brian M. Andersen, M. Tomić, Harald O. Jeschke, Roser Valentí, Indranil Paul, and P. J. Hirschfeld

Phys. Rev. Lett. 117, 259902 (2016) - Published 15 December, 2016

Publisher’s Note: New Integrable 4D Quantum Field Theories from Strongly Deformed Planar $N = 4$ Supersymmetric Yang-Mills Theory [Phys. Rev. Lett. 117, 201602 (2016)]

Ömer Gürdoğan and Vladimir Kazakov

Phys. Rev. Lett. 117, 259903 (2016) - Published 15 December, 2016