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Preview: Recent Articles in Phys. Rev. Lett.

Recent Articles in Phys. Rev. Lett.



Recent articles in Physical Review Letters



Published: 2017-02-22T15:43:26-05:00

 



Lifetime of B_{c}^{−} Mesons Constrains Explanations for Anomalies in B→D^{(*)} τν

2017-02-22T10:00:00-05:00

Author(s): Rodrigo Alonso, Benjamín Grinstein, and Jorge Martin Camalich
We investigate a new constraint on new-physics interpretations of the anomalies observed in B→D^{(*)}τν decays making use of the lifetime of the B_{c}^{−} meson. A constraint is obtained by demanding that the rate for B_{c}^{−}→τ^{−}ν[over ¯] does not exceed the fraction of the total width that is a…
[Phys. Rev. Lett. 118, 081802] Published Wed Feb 22, 2017



Dynamically Manipulating Topological Physics and Edge Modes in a Single Degenerate Optical Cavity

2017-02-22T10:00:00-05:00

Author(s): Xiang-Fa Zhou, Xi-Wang Luo, Su Wang, Guang-Can Guo, Xingxiang Zhou, Han Pu, and Zheng-Wei Zhou
We propose a scheme to simulate topological physics within a single degenerate cavity, whose modes are mapped to lattice sites. A crucial ingredient of the scheme is to construct a sharp boundary so that the open boundary condition can be implemented for this effective lattice system. In doing so, t…
[Phys. Rev. Lett. 118, 083603] Published Wed Feb 22, 2017



Anomalous Screening of Quantum Impurities by a Neutral Environment

2017-02-22T10:00:00-05:00

Author(s): E. Yakaboylu and M. Lemeshko
It is a common knowledge that an effective interaction of a quantum impurity with an electromagnetic field can be screened by surrounding charge carriers, whether mobile or static. Here we demonstrate that very strong, “anomalous” screening can take place in the presence of a neutral, weakly polariz…
[Phys. Rev. Lett. 118, 085302] Published Wed Feb 22, 2017



Quantitative Agreement between Electron-Optical Phase Images of WSe_{2} and Simulations Based on Electrostatic Potentials that Include Bonding Effects

2017-02-22T10:00:00-05:00

Author(s): S. Borghardt, F. Winkler, Z. Zanolli, M. J. Verstraete, J. Barthel, A. H. Tavabi, R. E. Dunin-Borkowski, and B. E. Kardynal
The quantitative analysis of electron-optical phase images recorded using off-axis electron holography often relies on the use of computer simulations of electron propagation through a sample. However, simulations that make use of the independent atom approximation are known to overestimate experime…
[Phys. Rev. Lett. 118, 086101] Published Wed Feb 22, 2017



Publisher’s Note: Spin Textures of Exciton-Polaritons in a Tunable Microcavity with Large TE-TM Splitting [Phys. Rev. Lett. 115, 246401 (2015)]

2017-02-22T10:00:00-05:00

Author(s): S. Dufferwiel, Feng Li, E. Cancellieri, L. Giriunas, A. A. P. Trichet, D. M. Whittaker, P. M. Walker, F. Fras, E. Clarke, J. M. Smith, M. S. Skolnick, and D. N. Krizhanovskii
[Phys. Rev. Lett. 118, 089901] Published Wed Feb 22, 2017



Publisher’s Note: Development of improved radiation drive environment for high foot implosions at the National Ignition Facility [Phys. Rev. Lett. 117, 225002 (2016)]

2017-02-22T10:00:00-05:00

Author(s): D. E. Hinkel, L. F. Berzak Hopkins, T. Ma, J. E. Ralph, F. Albert, L. R. Benedetti, P. M. Celliers, T. Döppner, C. S. Goyon, N. Izumi, L. C. Jarrott, S. F. Khan, J. L. Kline, A. L. Kritcher, G. A. Kyrala, S. R. Nagel, A. E. Pak, P. Patel, M. D. Rosen, J. R. Rygg, M. B. Schneider, D. P. Turnbull, C. B. Yeamans, D. A. Callahan, and O. A. Hurricane
[Phys. Rev. Lett. 118, 089902] Published Wed Feb 22, 2017



Quantum Machine Learning over Infinite Dimensions

2017-02-21T10:00:00-05:00

Author(s): Hoi-Kwan Lau, Raphael Pooser, George Siopsis, and Christian Weedbrook
Machine learning is a fascinating and exciting field within computer science. Recently, this excitement has been transferred to the quantum information realm. Currently, all proposals for the quantum version of machine learning utilize the finite-dimensional substrate of discrete variables. Here we …
[Phys. Rev. Lett. 118, 080501] Published Tue Feb 21, 2017



Conformal Bootstrap in Mellin Space

2017-02-21T10:00:00-05:00

Author(s): Rajesh Gopakumar, Apratim Kaviraj, Kallol Sen, and Aninda Sinha
We propose a new approach towards analytically solving for the dynamical content of conformal field theories (CFTs) using the bootstrap philosophy. This combines the original bootstrap idea of Polyakov with the modern technology of the Mellin representation of CFT amplitudes. We employ exchange Witt…
[Phys. Rev. Lett. 118, 081601] Published Tue Feb 21, 2017



Construction of all N=4 conformal supergravities

2017-02-21T10:00:00-05:00

Author(s): Daniel Butter, Franz Ciceri, Bernard de Wit, and Bindusar Sahoo
All N=4 conformal supergravities in four space-time dimensions are constructed. These are the only N=4 supergravity theories whose actions are invariant under off-shell supersymmetry. They are encoded in terms of a holomorphic function that is homogeneous of zeroth degree in scalar fields that param…
[Phys. Rev. Lett. 118, 081602] Published Tue Feb 21, 2017



Observation of the Annihilation Decay Mode B^{0} →K^{+} K^{−}

2017-02-21T10:00:00-05:00

Author(s): R. Aaij et al. (LHCb Collaboration)

The LHCb Collaboration reports the rarest (8 in 100 million events) fully hadronic B0 meson decay ever observed.

(image)
[Phys. Rev. Lett. 118, 081801] Published Tue Feb 21, 2017



Λ_{c} →Λl^{+} ν_{l} Form Factors and Decay Rates from Lattice QCD with Physical Quark Masses

2017-02-21T10:00:00-05:00

Author(s): Stefan Meinel
The first lattice QCD calculation of the form factors governing Λ_{c}→Λℓ^{+}ν_{ℓ} decays is reported. The calculation was performed with two different lattice spacings and includes one ensemble with a pion mass of 139(2) MeV. The resulting predictions for the Λ_{c}→Λe^{+}ν_{e} and Λ_{c}→Λμ^{+}ν_{μ} …
[Phys. Rev. Lett. 118, 082001] Published Tue Feb 21, 2017



Observation of Interaction of Spin and Intrinsic Orbital Angular Momentum of Light

2017-02-21T10:00:00-05:00

Author(s): Dashiell L. P. Vitullo, Cody C. Leary, Patrick Gregg, Roger A. Smith, Dileep V. Reddy, Siddharth Ramachandran, and Michael G. Raymer
The interaction of spin and intrinsic orbital angular momentum of light is observed, as evidenced by length-dependent rotations of both spatial patterns and optical polarization in a cylindrically symmetric isotropic optical fiber. Such rotations occur in a straight few-mode fiber when superposition…
[Phys. Rev. Lett. 118, 083601] Published Tue Feb 21, 2017



Repulsive Fermi Polarons in a Resonant Mixture of Ultracold ^{6} Li Atoms

2017-02-21T10:00:00-05:00

Author(s): F. Scazza, G. Valtolina, P. Massignan, A. Recati, A. Amico, A. Burchianti, C. Fort, M. Inguscio, M. Zaccanti, and G. Roati

Radio frequency spectroscopy measurements are used to determine the effective mass, energy, and decay rate of repulsive Fermi polaron quasiparticles that emerge from impurities in an ultracold Fermi gas.

(image)
[Phys. Rev. Lett. 118, 083602] Published Tue Feb 21, 2017



Subcycle Extreme Nonlinearities in GaP Induced by an Ultrastrong Terahertz Field

2017-02-21T10:00:00-05:00

Author(s): Carlo Vicario, Mostafa Shalaby, and Christoph P. Hauri
We report on the experimental observation of extreme laser spectral broadening and a change in optical transmission in gallium phosphite induced by 25  MV/cm terahertz (THz) single-cycle internal field. Such intense THz radiation leads to twofold transient modifications of the optical properties in …
[Phys. Rev. Lett. 118, 083901] Published Tue Feb 21, 2017



Buckling-Induced Kirigami

2017-02-21T10:00:00-05:00

Author(s): Ahmad Rafsanjani and Katia Bertoldi
We investigate the mechanical response of thin sheets perforated with a square array of mutually orthogonal cuts, which leaves a network of squares connected by small ligaments. Our combined analytical, experimental and numerical results indicate that under uniaxial tension the ligaments buckle out …
[Phys. Rev. Lett. 118, 084301] Published Tue Feb 21, 2017



Harnessing Geometric Frustration to Form Band Gaps in Acoustic Channel Lattices

2017-02-21T10:00:00-05:00

Author(s): Pai Wang, Yue Zheng, Matheus C. Fernandes, Yushen Sun, Kai Xu, Sijie Sun, Sung Hoon Kang, Vincent Tournat, and Katia Bertoldi
We demonstrate both numerically and experimentally that geometric frustration in two-dimensional periodic acoustic networks consisting of arrays of narrow air channels can be harnessed to form band gaps (ranges of frequency in which the waves cannot propagate in any direction through the system). Wh…
[Phys. Rev. Lett. 118, 084302] Published Tue Feb 21, 2017



Anomalous Heating and Plasmoid Formation in a Driven Magnetic Reconnection Experiment

2017-02-21T10:00:00-05:00

Author(s): J. D. Hare, L. Suttle, S. V. Lebedev, N. F. Loureiro, A. Ciardi, G. C. Burdiak, J. P. Chittenden, T. Clayson, C. Garcia, N. Niasse, T. Robinson, R. A. Smith, N. Stuart, F. Suzuki-Vidal, G. F. Swadling, J. Ma, J. Wu, and Q. Yang
We present a detailed study of magnetic reconnection in a quasi-two-dimensional pulsed-power driven laboratory experiment. Oppositely directed magnetic fields (B=3  T), advected by supersonic, sub-Alfvénic carbon plasma flows (V_{in}=50  km/s), are brought together and mutually annihilate inside a t…
[Phys. Rev. Lett. 118, 085001] Published Tue Feb 21, 2017



Why does Steady-State Magnetic Reconnection have a Maximum Local Rate of Order 0.1?

2017-02-21T10:00:00-05:00

Author(s): Yi-Hsin Liu, M. Hesse, F. Guo, W. Daughton, H. Li, P. A. Cassak, and M. A. Shay
Simulations suggest collisionless steady-state magnetic reconnection of Harris-type current sheets proceeds with a rate of order 0.1, independent of dissipation mechanism. We argue this long-standing puzzle is a result of constraints at the magnetohydrodynamic (MHD) scale. We predict the reconnectio…
[Phys. Rev. Lett. 118, 085101] Published Tue Feb 21, 2017



Space-Time Vortex Driven Crossover and Vortex Turbulence Phase Transition in One-Dimensional Driven Open Condensates

2017-02-21T10:00:00-05:00

Author(s): Liang He, Lukas M. Sieberer, and Sebastian Diehl
We find a first-order transition driven by the strength of nonequilibrium conditions of one-dimensional driven open condensates. Associated with this transition is a new stable nonequilibrium phase, space-time vortex turbulence, whose vortex density and quasiparticle distribution show strongly nonth…
[Phys. Rev. Lett. 118, 085301] Published Tue Feb 21, 2017



Nonmonotonic Aging and Memory Retention in Disordered Mechanical Systems

2017-02-21T10:00:00-05:00

Author(s): Yoav Lahini, Omer Gottesman, Ariel Amir, and Shmuel M. Rubinstein

Crumpled sheets “remember” the application and removal of a force for days, a newly discovered memory effect that suggests crumpled sheets are a lot like glasses.

(image)
[Phys. Rev. Lett. 118, 085501] Published Tue Feb 21, 2017



J Freezing and Hund’s Rules in Spin-Orbit-Coupled Multiorbital Hubbard Models

2017-02-21T10:00:00-05:00

Author(s): Aaram J. Kim, Harald O. Jeschke, Philipp Werner, and Roser Valentí
We investigate the phase diagram of the spin-orbit-coupled three orbital Hubbard model at arbitrary filling by means of dynamical mean-field theory combined with the continuous-time quantum Monte Carlo method. We find that the spin-freezing crossover occurring in the metallic phase of the nonrelativ…
[Phys. Rev. Lett. 118, 086401] Published Tue Feb 21, 2017



Lyapunov Exponent and Out-of-Time-Ordered Correlator’s Growth Rate in a Chaotic System

2017-02-21T10:00:00-05:00

Author(s): Efim B. Rozenbaum, Sriram Ganeshan, and Victor Galitski
It was proposed recently that the out-of-time-ordered four-point correlator (OTOC) may serve as a useful characteristic of quantum-chaotic behavior, because, in the semiclassical limit ℏ→0, its rate of exponential growth resembles the classical Lyapunov exponent. Here, we calculate the four-point co…
[Phys. Rev. Lett. 118, 086801] Published Tue Feb 21, 2017



Unconventional Superconductivity in Bilayer Transition Metal Dichalcogenides

2017-02-21T10:00:00-05:00

Author(s): Chao-Xing Liu
Bilayer transition metal dichalcogenides (TMDs) belong to a class of materials with two unique features, the coupled spin-valley-layer degrees of freedom and the crystal structure that is globally centrosymmetric but locally noncentrosymmetric. In this Letter, we will show that the combination of th…
[Phys. Rev. Lett. 118, 087001] Published Tue Feb 21, 2017



Theory of Laser-Controlled Competing Superconducting and Charge Orders

2017-02-21T10:00:00-05:00

Author(s): M. A. Sentef, A. Tokuno, A. Georges, and C. Kollath
We investigate the nonequilibrium dynamics of competing coexisting superconducting (SC) and charge-density wave (CDW) orders in an attractive Hubbard model. A time-periodic laser field A[over →](t) lifts the SC-CDW degeneracy, since the CDW couples linearly to the field (A[over →]), whereas SC coupl…
[Phys. Rev. Lett. 118, 087002] Published Tue Feb 21, 2017



Unconventional Surface Critical Behavior Induced by a Quantum Phase Transition from the Two-Dimensional Affleck-Kennedy-Lieb-Tasaki Phase to a Néel-Ordered Phase

2017-02-21T10:00:00-05:00

Author(s): Long Zhang and Fa Wang
A symmetry-protected topological phase has nontrivial surface states in the presence of certain symmetries, which can either be gapless or be degenerate. In this work, we study the physical consequence of such gapless surface states at the bulk quantum phase transition (QPT) that spontaneously break…
[Phys. Rev. Lett. 118, 087201] Published Tue Feb 21, 2017



Temperature and Magnetic Field Dependence of the Internal and Lattice Structures of Skyrmions by Off-Axis Electron Holography

2017-02-21T10:00:00-05:00

Author(s): K. Shibata, A. Kovács, N. S. Kiselev, N. Kanazawa, R. E. Dunin-Borkowski, and Y. Tokura
The internal and lattice structures of magnetic Skyrmions in B20-type FeGe are investigated using off-axis electron holography. The temperature, magnetic field, and angular dependence of the magnetic moments of individual Skyrmions are analyzed. The internal Skyrmion shape is found to vary with appl…
[Phys. Rev. Lett. 118, 087202] Published Tue Feb 21, 2017



Experimental and Ab Initio Ultrafast Carrier Dynamics in Plasmonic Nanoparticles

2017-02-21T10:00:00-05:00

Author(s): Ana M. Brown, Ravishankar Sundararaman, Prineha Narang, Adam M. Schwartzberg, William A. Goddard, III, and Harry A. Atwater
Ultrafast pump-probe measurements of plasmonic nanostructures probe the nonequilibrium behavior of excited carriers, which involves several competing effects obscured in typical empirical analyses. Here we present pump-probe measurements of plasmonic nanoparticles along with a complete theoretical d…
[Phys. Rev. Lett. 118, 087401] Published Tue Feb 21, 2017



Theory of Shape-Shifting Droplets

2017-02-21T10:00:00-05:00

Author(s): Pierre A. Haas, Raymond E. Goldstein, Stoyan K. Smoukov, Diana Cholakova, and Nikolai Denkov
Recent studies of cooled oil emulsion droplets uncovered transformations into a host of flattened shapes with straight edges and sharp corners, driven by a partial phase transition of the bulk liquid phase. Here, we explore theoretically the simplest geometric competition between this phase transiti…
[Phys. Rev. Lett. 118, 088001] Published Tue Feb 21, 2017



Fluidization and Active Thinning by Molecular Kinetics in Active Gels

2017-02-21T10:00:00-05:00

Author(s): David Oriola, Ricard Alert, and Jaume Casademunt
We derive the constitutive equations of an active polar gel from a model for the dynamics of elastic molecules that link polar elements. Molecular binding kinetics induces the fluidization of the material, giving rise to Maxwell viscoelasticity and, provided that detailed balance is broken, to the g…
[Phys. Rev. Lett. 118, 088002] Published Tue Feb 21, 2017



Distinguishing Signatures of Multipathway Conformational Transitions

2017-02-21T10:00:00-05:00

Author(s): Christopher A. Pierse and Olga K. Dudko
The folding and binding of biomolecules into functional conformations are thought to be commonly mediated by multiple pathways rather than a unique route. Yet even in experiments where one can “see” individual conformational transitions, their stochastic nature generally precludes one from determini…
[Phys. Rev. Lett. 118, 088101] Published Tue Feb 21, 2017



Digital Quantum Simulation of Z_{2} Lattice Gauge Theories with Dynamical Fermionic Matter

2017-02-17T10:00:00-05:00

Author(s): Erez Zohar, Alessandro Farace, Benni Reznik, and J. Ignacio Cirac
We propose a scheme for digital quantum simulation of lattice gauge theories with dynamical fermions. Using a layered optical lattice with ancilla atoms that can move and interact with the other atoms (simulating the physical degrees of freedom), we obtain a stroboscopic dynamics which yields the fo…
[Phys. Rev. Lett. 118, 070501] Published Fri Feb 17, 2017



Exponentially Biased Ground-State Sampling of Quantum Annealing Machines with Transverse-Field Driving Hamiltonians

2017-02-17T10:00:00-05:00

Author(s): Salvatore Mandrà, Zheng Zhu, and Helmut G. Katzgraber
We study the performance of the D-Wave 2X quantum annealing machine on systems with well-controlled ground-state degeneracy. While obtaining the ground state of a spin-glass benchmark instance represents a difficult task, the gold standard for any optimization algorithm or machine is to sample all s…
[Phys. Rev. Lett. 118, 070502] Published Fri Feb 17, 2017



Continuous-Variable Instantaneous Quantum Computing is Hard to Sample

2017-02-17T10:00:00-05:00

Author(s): T. Douce, D. Markham, E. Kashefi, E. Diamanti, T. Coudreau, P. Milman, P. van Loock, and G. Ferrini
Instantaneous quantum computing is a subuniversal quantum complexity class, whose circuits have proven to be hard to simulate classically in the discrete-variable realm. We extend this proof to the continuous-variable (CV) domain by using squeezed states and homodyne detection, and by exploring the …
[Phys. Rev. Lett. 118, 070503] Published Fri Feb 17, 2017



Quantum Estimation Methods for Quantum Illumination

2017-02-17T10:00:00-05:00

Author(s): M. Sanz, U. Las Heras, J. J. García-Ripoll, E. Solano, and R. Di Candia
Quantum illumination consists in shining quantum light on a target region immersed in a bright thermal bath with the aim of detecting the presence of a possible low-reflective object. If the signal is entangled with the receiver, then a suitable choice of the measurement offers a gain with respect t…
[Phys. Rev. Lett. 118, 070803] Published Fri Feb 17, 2017



Density Induced Phase Transitions in the Schwinger Model: A Study with Matrix Product States

2017-02-17T10:00:00-05:00

Author(s): Mari Carmen Bañuls, Krzysztof Cichy, J. Ignacio Cirac, Karl Jansen, and Stefan Kühn
We numerically study the zero temperature phase structure of the multiflavor Schwinger model at nonzero chemical potential. Using matrix product states, we reproduce analytical results for the phase structure for two flavors in the massless case and extend the computation to the massive case, where …
[Phys. Rev. Lett. 118, 071601] Published Fri Feb 17, 2017



Next-to-Next-to Leading Order QCD Predictions for Single Jet Inclusive Production at the LHC

2017-02-17T10:00:00-05:00

Author(s): J. Currie, E. W. N. Glover, and J. Pires
We report the first calculation of fully differential jet production at leading color in all partonic channels at next-to-next-to leading order in perturbative QCD and compare to the available ATLAS 7 TeV data. We discuss the size and shape of the perturbative corrections along with their associated…
[Phys. Rev. Lett. 118, 072002] Published Fri Feb 17, 2017



Probing the Dynamics of a Superradiant Quantum Phase Transition with a Single Trapped Ion

2017-02-17T10:00:00-05:00

Author(s): Ricardo Puebla, Myung-Joong Hwang, Jorge Casanova, and Martin B. Plenio
We demonstrate that the quantum phase transition (QPT) of the Rabi model and critical dynamics near the QPT can be probed in the setup of a single trapped ion. We first demonstrate that there exists equilibrium and nonequilibrium scaling functions of the Rabi model by finding a proper rescaling of t…
[Phys. Rev. Lett. 118, 073001] Published Fri Feb 17, 2017



Quantum Engineering of a Low-Entropy Gas of Heteronuclear Bosonic Molecules in an Optical Lattice

2017-02-17T10:00:00-05:00

Author(s): Lukas Reichsöllner, Andreas Schindewolf, Tetsu Takekoshi, Rudolf Grimm, and Hanns-Christoph Nägerl
We demonstrate a generally applicable technique for mixing two-species quantum degenerate bosonic samples in the presence of an optical lattice, and we employ it to produce low-entropy samples of ultracold ^{87}Rb^{133}Cs Feshbach molecules with a lattice filling fraction exceeding 30%. Starting fro…
[Phys. Rev. Lett. 118, 073201] Published Fri Feb 17, 2017



Parasitic Photon-Pair Suppression via Photonic Stop-Band Engineering

2017-02-17T10:00:00-05:00

Author(s): L. G. Helt, Agata M. Brańczyk, Marco Liscidini, and M. J. Steel
We calculate that an appropriate modification of the field associated with only one of the photons of a photon pair can suppress generation of the pair entirely. From this general result, we develop a method for suppressing the generation of undesired photon pairs utilizing photonic stop bands. For …
[Phys. Rev. Lett. 118, 073603] Published Fri Feb 17, 2017



Evanescent-Vacuum-Enhanced Photon-Exciton Coupling and Fluorescence Collection

2017-02-17T10:00:00-05:00

Author(s): Juanjuan Ren, Ying Gu, Dongxing Zhao, Fan Zhang, Tiancai Zhang, and Qihuang Gong
An evanescent optical mode existing in various nanophotonic structures always acts as a cavity mode rather than an electromagnetic vacuum in the study of cavity quantum electrodynamics (CQED). Here we show that taking the evanescent mode as an electromagnetic vacuum in which the nanocavity is locate…
[Phys. Rev. Lett. 118, 073604] Published Fri Feb 17, 2017



Coherent Population Oscillation-Based Light Storage

2017-02-17T10:00:00-05:00

Author(s): P. Neveu, M.-A. Maynard, R. Bouchez, J. Lugani, R. Ghosh, F. Bretenaker, F. Goldfarb, and E. Brion
We theoretically study the propagation and storage of a classical field in a Λ-type atomic medium using coherent population oscillations (CPOs). We show that the propagation eigenmodes strongly relate to the different CPO modes of the system. Light storage in such modes is discussed by introducing a…
[Phys. Rev. Lett. 118, 073605] Published Fri Feb 17, 2017



Novel Lasers Based on Resonant Dark States

2017-02-17T10:00:00-05:00

Author(s): Sotiris Droulias, Aditya Jain, Thomas Koschny, and Costas M. Soukoulis
The route to miniaturization of laser systems has so far led to the utilization of diverse materials and techniques for reaching the desired laser oscillation at small scales. Unfortunately, at some point all approaches encounter a trade-off between the system dimensions and the Q factor, especially…
[Phys. Rev. Lett. 118, 073901] Published Fri Feb 17, 2017



Marangoni Bursting: Evaporation-Induced Emulsification of Binary Mixtures on a Liquid Layer

2017-02-17T10:00:00-05:00

Author(s): L. Keiser, H. Bense, P. Colinet, J. Bico, and E. Reyssat

A drop of water-alcohol mixture on a layer of oil was caught on video bursting into thousands of tiny droplets.

(image)
[Phys. Rev. Lett. 118, 074504] Published Fri Feb 17, 2017



Generalized Knudsen Number for Unsteady Fluid Flow

2017-02-17T10:00:00-05:00

Author(s): V. Kara, V. Yakhot, and K. L. Ekinci
We explore the scaling behavior of an unsteady flow that is generated by an oscillating body of finite size in a gas. If the gas is gradually rarefied, the Navier-Stokes equations begin to fail and a kinetic description of the flow becomes more appropriate. The failure of the Navier-Stokes equations…
[Phys. Rev. Lett. 118, 074505] Published Fri Feb 17, 2017



Numerical Investigation of Thermal Counterflow of He II Past Cylinders

2017-02-17T10:00:00-05:00

Author(s): Cyprien Soulaine, Michel Quintard, Bertrand Baudouy, and Rob Van Weelderen
We investigate numerically, for the first time, the thermal counterflow of superfluid helium past a cylinder by solving with a finite volume method the complete so-called two-fluid model. In agreement with existing experimental results, we obtain symmetrical eddies both up- and downstream of the obs…
[Phys. Rev. Lett. 118, 074506] Published Fri Feb 17, 2017



Optically Imaged Striped Domains of Nonequilibrium Electronic and Nuclear Spins in a Fractional Quantum Hall Liquid

2017-02-17T10:00:00-05:00

Author(s): John N. Moore, Junichiro Hayakawa, Takaaki Mano, Takeshi Noda, and Go Yusa

Photoluminescence and magnetic resonance imaging reveal deformable regions in fractional quantum Hall liquids that produce nuclear spins from spin-polarized electrons.

(image)
[Phys. Rev. Lett. 118, 076802] Published Fri Feb 17, 2017



Novel Topological Phase with a Zero Berry Curvature

2017-02-17T10:00:00-05:00

Author(s): Feng Liu and Katsunori Wakabayashi
We present a two-dimensional (2D) lattice model that exhibits a nontrivial topological phase in the absence of the Berry curvature. Instead, the Berry connection provides the topological nontrivial phase in the model, whose integration over the momentum space, the so-called 2D Zak phase, yields a fr…
[Phys. Rev. Lett. 118, 076803] Published Fri Feb 17, 2017



Spontaneous Currents in Superconducting Systems with Strong Spin-Orbit Coupling

2017-02-17T10:00:00-05:00

Author(s): S. Mironov and A. Buzdin

Spin-orbit-model calculations predict a spontaneous supercurrent at the interface between an s-wave superconductor and a ferromagnet.

(image)
[Phys. Rev. Lett. 118, 077001] Published Fri Feb 17, 2017



Emergent Structures in an Active Polar Fluid: Dynamics of Shape, Scattering, and Merger

2017-02-17T10:00:00-05:00

Author(s): Kabir Husain and Madan Rao
Spatially localized defect structures emerge spontaneously in a hydrodynamic description of an active polar fluid comprising polar “actin” filaments and “myosin” motor proteins that (un)bind to filaments and exert active contractile stresses. These emergent defect structures are characterized by dis…
[Phys. Rev. Lett. 118, 078104] Published Fri Feb 17, 2017



Mapping the Structure of Directed Networks: Beyond the Bow-Tie Diagram

2017-02-17T10:00:00-05:00

Author(s): G. Timár, A. V. Goltsev, S. N. Dorogovtsev, and J. F. F. Mendes
We reveal a hierarchical, multilayer organization of finite components—i.e., tendrils and tubes—around the giant connected components in directed networks and propose efficient algorithms allowing one to uncover the entire organization of key real-world directed networks, such as the World Wide Web,…
[Phys. Rev. Lett. 118, 078301] Published Fri Feb 17, 2017



Erratum: Linear Optical Quantum Metrology with Single Photons: Exploiting Spontaneously Generated Entanglement to Beat the Shot-Noise Limit [Phys. Rev. Lett. 114, 170802 (2015)]

2017-02-17T10:00:00-05:00

Author(s): Keith R. Motes, Jonathan P. Olson, Evan J. Rabeaux, Jonathan P. Dowling, S. Jay Olson, and Peter P. Rohde
[Phys. Rev. Lett. 118, 079901] Published Fri Feb 17, 2017



Localization in Open Quantum Systems

2017-02-16T10:00:00-05:00

Author(s): I. Yusipov, T. Laptyeva, S. Denisov, and M. Ivanchenko
In an isolated single-particle quantum system, a spatial disorder can induce Anderson localization. Being a result of interference, this phenomenon is expected to be fragile in the face of dissipation. Here we show that a proper dissipation can drive a disordered system into a steady state with tuna…
[Phys. Rev. Lett. 118, 070402] Published Thu Feb 16, 2017



Spin-Polarizing Interferometric Beam Splitter for Free Electrons

2017-02-16T10:00:00-05:00

Author(s): Matthias M. Dellweg and Carsten Müller
A spin-polarizing electron beam splitter is described that relies on an arrangement of linearly polarized laser waves of nonrelativistic intensity. An incident electron beam is first coherently scattered off a bichromatic laser field, splitting the beam into two portions, with electron spin and mome…
[Phys. Rev. Lett. 118, 070403] Published Thu Feb 16, 2017



Observation of the Decay Ξ_{b}^{−} →pK^{−} K^{−}

2017-02-16T10:00:00-05:00

Author(s): R. Aaij et al. (LHCb Collaboration)
Decays of the Ξ_{b}^{−} and Ω_{b}^{−} baryons to the charmless final states ph^{−}h^{′−}, where h^{(′)} denotes a kaon or pion, are searched for with the LHCb detector. The analysis is based on a sample of proton-proton collision data collected at center-of-mass energies sqrt[s]=7 and 8 TeV, corresp…
[Phys. Rev. Lett. 118, 071801] Published Thu Feb 16, 2017



Search for Two-Photon Interaction with Axionlike Particles Using High-Repetition Pulsed Magnets and Synchrotron X Rays

2017-02-16T10:00:00-05:00

Author(s): T. Inada, T. Yamazaki, T. Namba, S. Asai, T. Kobayashi, K. Tamasaku, Y. Tanaka, Y. Inubushi, K. Sawada, M. Yabashi, T. Ishikawa, A. Matsuo, K. Kawaguchi, K. Kindo, and H. Nojiri
We report on new results of a search for a two-photon interaction with axionlike particles (ALPs). The experiment is carried out at a synchrotron radiation facility using a “light shining through a wall (LSW)” technique. For this purpose, we develop a novel pulsed-magnet system, composed of multiple…
[Phys. Rev. Lett. 118, 071803] Published Thu Feb 16, 2017



94 β-Decay Half-Lives of Neutron-Rich _{55} Cs to _{67} Ho: Experimental Feedback and Evaluation of the r-Process Rare-Earth Peak Formation

2017-02-16T10:00:00-05:00

Author(s): J. Wu et al.
The β-decay half-lives of 94 neutron-rich nuclei ^{144−151}Cs, ^{146−154}Ba, ^{148−156}La, ^{150−158}Ce, ^{153−160}Pr, ^{156−162}Nd, ^{159−163}Pm, ^{160−166}Sm, ^{161−168}Eu, ^{165−170}Gd, ^{166−172}Tb, ^{169−173}Dy, ^{172−175}Ho, and two isomeric states ^{174m}Er, ^{172m}Dy were measured at the Rad…
[Phys. Rev. Lett. 118, 072701] Published Thu Feb 16, 2017



Superradiant Topological Peierls Insulator inside an Optical Cavity

2017-02-16T10:00:00-05:00

Author(s): Farokh Mivehvar, Helmut Ritsch, and Francesco Piazza
We consider a spinless ultracold Fermi gas tightly trapped along the axis of an optical resonator and transversely illuminated by a laser closely tuned to a resonator mode. At a certain threshold pump intensity, the homogeneous gas density breaks a Z_{2} symmetry towards a spatially periodic order, …
[Phys. Rev. Lett. 118, 073602] Published Thu Feb 16, 2017



Roughness as a Route to the Ultimate Regime of Thermal Convection

2017-02-16T10:00:00-05:00

Author(s): Srikanth Toppaladoddi, Sauro Succi, and John S. Wettlaufer
We use highly resolved numerical simulations to study turbulent Rayleigh-Bénard convection in a cell with sinusoidally rough upper and lower surfaces in two dimensions for Pr=1 and Ra=[4×10^{6},3×10^{9}]. By varying the wavelength λ at a fixed amplitude, we find an optimal wavelength λ_{opt} for whi…
[Phys. Rev. Lett. 118, 074503] Published Thu Feb 16, 2017



Ion Structure Near a Core-Shell Dielectric Nanoparticle

2017-02-16T10:00:00-05:00

Author(s): Manman Ma, Zecheng Gan, and Zhenli Xu
A generalized image charge formulation is proposed for the Green’s function of a core-shell dielectric nanoparticle for which theoretical and simulation investigations are rarely reported due to the difficulty of resolving the dielectric heterogeneity. Based on the formulation, an efficient and accu…
[Phys. Rev. Lett. 118, 076102] Published Thu Feb 16, 2017



Load and Time Dependence of Interfacial Chemical Bond-Induced Friction at the Nanoscale

2017-02-16T10:00:00-05:00

Author(s): Kaiwen Tian, Nitya N. Gosvami, David L. Goldsby, Yun Liu, Izabela Szlufarska, and Robert W. Carpick
Rate and state friction (RSF) laws are widely used empirical relationships that describe the macroscale frictional behavior of a broad range of materials, including rocks found in the seismogenic zone of Earth’s crust. A fundamental aspect of the RSF laws is frictional “aging,” where friction increa…
[Phys. Rev. Lett. 118, 076103] Published Thu Feb 16, 2017



Cornering Gapless Quantum States via Their Torus Entanglement

2017-02-16T10:00:00-05:00

Author(s): William Witczak-Krempa, Lauren E. Hayward Sierens, and Roger G. Melko
The entanglement entropy (EE) has emerged as an important window into the structure of complex quantum states of matter. We analyze the universal part of the EE for gapless systems on tori in 2D and 3D, denoted by χ. Focusing on scale-invariant systems, we derive general nonperturbative properties f…
[Phys. Rev. Lett. 118, 077202] Published Thu Feb 16, 2017



Persistence-Driven Durotaxis: Generic, Directed Motility in Rigidity Gradients

2017-02-16T10:00:00-05:00

Author(s): Elizaveta A. Novikova, Matthew Raab, Dennis E. Discher, and Cornelis Storm
Cells move differently on substrates with different rigidities: the persistence time of their motion is higher on stiffer substrates. We show that this behavior—in and of itself—results in a net flux of cells directed up a soft-to-stiff gradient. Using simple random walk models with varying persiste…
[Phys. Rev. Lett. 118, 078103] Published Thu Feb 16, 2017



Transition Path Time Distribution, Tunneling Times, Friction, and Uncertainty

2017-02-15T10:00:00-05:00

Author(s): Eli Pollak
A quantum mechanical transition path time probability distribution is formulated and its properties are studied using a parabolic barrier potential model. The average transit time is well defined and readily calculated. It is smaller than the analogous classical mechanical average transit time, vani…
[Phys. Rev. Lett. 118, 070401] Published Wed Feb 15, 2017



Beating Rayleigh’s Curse by Imaging Using Phase Information

2017-02-15T10:00:00-05:00

Author(s): Weng-Kian Tham, Hugo Ferretti, and Aephraim M. Steinberg
Every imaging system has a resolution limit, typically defined by Rayleigh’s criterion. Given a fixed number of photons, the amount of information one can gain from an image about the separation between two sources falls to zero as the separation drops below this limit, an effect dubbed “Rayleigh’s …
[Phys. Rev. Lett. 118, 070801] Published Wed Feb 15, 2017



Weak Value Amplification Can Outperform Conventional Measurement in the Presence of Detector Saturation

2017-02-15T10:00:00-05:00

Author(s): Jérémie Harris, Robert W. Boyd, and Jeff S. Lundeen
Weak value amplification (WVA) is a technique by which one can magnify the apparent strength of a measurement signal. Some have claimed that WVA can outperform more conventional measurement schemes in parameter estimation. Nonetheless, a significant body of theoretical work has challenged this persp…
[Phys. Rev. Lett. 118, 070802] Published Wed Feb 15, 2017



Unifying Inflation with the Axion, Dark Matter, Baryogenesis, and the Seesaw Mechanism

2017-02-15T10:00:00-05:00

Author(s): Guillermo Ballesteros, Javier Redondo, Andreas Ringwald, and Carlos Tamarit

A minimal extension to the standard model of particle physics involves six new particles.

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[Phys. Rev. Lett. 118, 071802] Published Wed Feb 15, 2017



Precision Determination of the Small-x Gluon from Charm Production at LHCb

2017-02-15T10:00:00-05:00

Author(s): Rhorry Gauld and Juan Rojo
The small-x gluon in global fits of parton distributions is affected by large uncertainties from the lack of direct experimental constraints. In this Letter, we provide a precision determination of the small-x gluon from the exploitation of forward charm production data provided by LHCb for three di…
[Phys. Rev. Lett. 118, 072001] Published Wed Feb 15, 2017



First Demonstration of Laser-Assisted Charge Exchange for Microsecond Duration H^{−} Beams

2017-02-15T10:00:00-05:00

Author(s): Sarah Cousineau, Abdurahim Rakhman, Martin Kay, Alexander Aleksandrov, Viatcheslav Danilov, Timofey Gorlov, Yun Liu, Michael Plum, Andrei Shishlo, and David Johnson
This Letter reports on the first demonstration of laser-assisted H^{−} charge exchange for microsecond duration H^{−} beam pulses. Laser-assisted charge exchange injection is a breakthrough technology that overcomes long-standing limitations associated with the traditional method of producing high i…
[Phys. Rev. Lett. 118, 074801] Published Wed Feb 15, 2017



Determination of Surface Recombination Velocities at Contacts in Organic Semiconductor Devices Using Injected Carrier Reservoirs

2017-02-15T10:00:00-05:00

Author(s): Oskar J. Sandberg, Simon Sandén, Anton Sundqvist, Jan-Henrik Smått, and Ronald Österbacka
A method to determine surface recombination velocities at collecting contacts in interface-limited organic semiconductor devices, based on the extraction of injected carrier reservoirs in a single-carrier sandwich-type structure, is presented. The analytical framework is derived and verified with dr…
[Phys. Rev. Lett. 118, 076601] Published Wed Feb 15, 2017



Itinerant Antiferromagnetism in RuO_{2}

2017-02-15T10:00:00-05:00

Author(s): T. Berlijn, P. C. Snijders, O. Delaire, H.-D. Zhou, T. A. Maier, H.-B. Cao, S.-X. Chi, M. Matsuda, Y. Wang, M. R. Koehler, P. R. C. Kent, and H. H. Weitering
Bulk rutile RuO_{2} has long been considered a Pauli paramagnet. Here we report that RuO_{2} exhibits a hitherto undetected lattice distortion below approximately 900 K. The distortion is accompanied by antiferromagnetic order up to at least 300 K with a small room temperature magnetic moment of app…
[Phys. Rev. Lett. 118, 077201] Published Wed Feb 15, 2017



Catastrophic Thinning of Dielectric Elastomers

2017-02-15T10:00:00-05:00

Author(s): G. Zurlo, M. Destrade, D. DeTommasi, and G. Puglisi
We provide an energetic insight into the catastrophic nature of thinning instability in soft electroactive elastomers. This phenomenon is a major obstacle to the development of giant actuators, yet it is neither completely understood nor modeled accurately. In excellent agreement with experiments, w…
[Phys. Rev. Lett. 118, 078001] Published Wed Feb 15, 2017



Reversible Switching of Cooperating Replicators

2017-02-15T10:00:00-05:00

Author(s): Georg C. Urtel, Thomas Rind, and Dieter Braun
How can molecules with short lifetimes preserve their information over millions of years? For evolution to occur, information-carrying molecules have to replicate before they degrade. Our experiments reveal a robust, reversible cooperation mechanism in oligonucleotide replication. Two inherently slo…
[Phys. Rev. Lett. 118, 078102] Published Wed Feb 15, 2017



No-Go Theorem for the Characterization of Work Fluctuations in Coherent Quantum Systems

2017-02-14T10:00:00-05:00

Author(s): Martí Perarnau-Llobet, Elisa Bäumer, Karen V. Hovhannisyan, Marcus Huber, and Antonio Acin

The operator of work in quantum thermodynamics is incompatible with quantum mechanics, which is why the correspondence principle has to be critically examined whenever work is involved.

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[Phys. Rev. Lett. 118, 070601] Published Tue Feb 14, 2017



Direct Self-Sustained Fragmentation Cascade of Reactive Droplets

2017-02-14T10:00:00-05:00

Author(s): Chihiro Inoue, Yu-ichiro Izato, Atsumi Miyake, and Emmanuel Villermaux
A traditional hand-held firework generates light streaks similar to branched pine needles, with ever smaller ramifications. These streaks are the trajectories of incandescent reactive liquid droplets bursting from a melted powder. We have uncovered the detailed sequence of events, which involve a ch…
[Phys. Rev. Lett. 118, 074502] Published Tue Feb 14, 2017



Anisotropic Electron Tail Generation during Tearing Mode Magnetic Reconnection

2017-02-14T10:00:00-05:00

Author(s): Ami M. DuBois, Abdulgader F. Almagri, Jay K. Anderson, Daniel J. Den Hartog, John David Lee, and John S. Sarff
The first experimental evidence of anisotropic electron energization during magnetic reconnection that favors a direction perpendicular to the guide magnetic field in a toroidal, magnetically confined plasma is reported in this Letter. Magnetic reconnection plays an important role in particle heatin…
[Phys. Rev. Lett. 118, 075001] Published Tue Feb 14, 2017



Wake-Mediated Propulsion of an Upstream Particle in Two-Dimensional Plasma Crystals

2017-02-14T10:00:00-05:00

Author(s): I. Laut, C. Räth, S. K. Zhdanov, V. Nosenko, G. E. Morfill, and H. M. Thomas
The wake-mediated propulsion of an “extra” particle in a channel of two neighboring rows of a two-dimensional plasma crystal, observed experimentally by Du et al. [Phys. Rev. E 89, 021101(R) (2014)], is explained in simulations and theory. We use the simple model of a pointlike ion wake charge to re…
[Phys. Rev. Lett. 118, 075002] Published Tue Feb 14, 2017



Fluorescent Nanowire Ring Illumination for Wide-Field Far-Field Subdiffraction Imaging

2017-02-14T10:00:00-05:00

Author(s): Xiaowei Liu, Cuifang Kuang, Xiang Hao, Chenlei Pang, Pengfei Xu, Haifeng Li, Ying Liu, Chao Yu, Yingke Xu, Di Nan, Weidong Shen, Yue Fang, Lenian He, Xu Liu, and Qing Yang
Here we demonstrate an active method which pioneers in utilizing a combination of a spatial frequency shift and a Stokes frequency shift to enable wide-field far-field subdiffraction imaging. A fluorescent nanowire ring acts as a localized source and is combined with a film waveguide to produce omni…
[Phys. Rev. Lett. 118, 076101] Published Tue Feb 14, 2017



Fundamental Limits to Collective Concentration Sensing in Cell Populations

2017-02-14T10:00:00-05:00

Author(s): Sean Fancher and Andrew Mugler

Cells that communicate with each other can measure chemical concentrations with higher precision if they spread out into a sparse configuration.

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[Phys. Rev. Lett. 118, 078101] Published Tue Feb 14, 2017



Spin-Dependent Weakly-Interacting-Massive-Particle–Nucleon Cross Section Limits from First Data of PandaX-II Experiment

2017-02-13T10:00:00-05:00

Author(s): Changbo Fu et al. (PandaX-II Collaboration)

New data from the PandaX-II experiment in China improves the bounds on the spin-dependent cross-sections for WIMP dark matter by a factor of two.

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[Phys. Rev. Lett. 118, 071301] Published Mon Feb 13, 2017



Transportable Optical Lattice Clock with 7×10^{−17} Uncertainty

2017-02-13T10:00:00-05:00

Author(s): S. B. Koller, J. Grotti, St. Vogt, A. Al-Masoudi, S. Dörscher, S. Häfner, U. Sterr, and Ch. Lisdat

Transportable atomic clocks are now operating with fractional-frequency uncertainties below one part in 1016, opening up new applications.

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[Phys. Rev. Lett. 118, 073601] Published Mon Feb 13, 2017



Formation and Destabilization of the Particle Band on the Fluid-Fluid Interface

2017-02-13T10:00:00-05:00

Author(s): Jungchul Kim, Feng Xu, and Sungyon Lee

New experiments show that when a particle suspension is injected into oil, the particles congregate at the oil-suspension interface, causing it to destabilize.

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[Phys. Rev. Lett. 118, 074501] Published Mon Feb 13, 2017



Minimal Excitations in the Fractional Quantum Hall Regime

2017-02-13T10:00:00-05:00

Author(s): J. Rech, D. Ferraro, T. Jonckheere, L. Vannucci, M. Sassetti, and T. Martin
We study the minimal excitations of fractional quantum Hall edges, extending the notion of levitons to interacting systems. Using both perturbative and exact calculations, we show that they arise in response to a Lorentzian potential with quantized flux. They carry an integer charge, thus involving …
[Phys. Rev. Lett. 118, 076801] Published Mon Feb 13, 2017



Interaction-Assisted Quantum Tunneling of a Bose-Einstein Condensate Out of a Single Trapping Well

2017-02-10T10:00:00-05:00

Author(s): Shreyas Potnis, Ramon Ramos, Kenji Maeda, Lincoln D. Carr, and Aephraim M. Steinberg
We experimentally study tunneling of Bose-condensed ^{87}Rb atoms prepared in a quasibound state and observe a nonexponential decay caused by interatomic interactions. A combination of a magnetic quadrupole trap and a thin 1.3  μm barrier created using a blue-detuned sheet of light is used to tailor…
[Phys. Rev. Lett. 118, 060402] Published Fri Feb 10, 2017



Testing the Axion-Conversion Hypothesis of 3.5 keV Emission with Polarization

2017-02-10T10:00:00-05:00

Author(s): Yan Gong, Xuelei Chen, and Hua Feng
The recently measured 3.5 keV line in a number of galaxy clusters, the Andromeda galaxy (M31), and the Milky Way (MW) center can be well accounted for by a scenario in which dark matter decays to axionlike particles (ALPs) and subsequently convert to 3.5 keV photons in magnetic fields of galaxy clus…
[Phys. Rev. Lett. 118, 061101] Published Fri Feb 10, 2017



Graviton and Gluon Scattering from First Principles

2017-02-10T10:00:00-05:00

Author(s): Rutger H. Boels and Ricardo Medina
Graviton and gluon scattering are studied from minimal physical assumptions such as Poincare and gauge symmetry as well as unitarity. The assumptions lead to an interesting and surprisingly restrictive set of linear equations. This shows gluon and graviton scattering to be related in many field and …
[Phys. Rev. Lett. 118, 061602] Published Fri Feb 10, 2017



Search for Magnetic Monopoles with the MoEDAL Forward Trapping Detector in 13 TeV Proton-Proton Collisions at the LHC

2017-02-10T10:00:00-05:00

Author(s): B. Acharya et al. (MoEDAL Collaboration)
MoEDAL is designed to identify new physics in the form of long-lived highly ionizing particles produced in high-energy LHC collisions. Its arrays of plastic nuclear-track detectors and aluminium trapping volumes provide two independent passive detection techniques. We present here the results of a f…
[Phys. Rev. Lett. 118, 061801] Published Fri Feb 10, 2017



Characterizing Neutron-Proton Equilibration in Nuclear Reactions with Subzeptosecond Resolution

2017-02-10T10:00:00-05:00

Author(s): A. Jedele, A. B. McIntosh, K. Hagel, M. Huang, L. Heilborn, Z. Kohley, L. W. May, E. McCleskey, M. Youngs, A. Zarrella, and S. J. Yennello

The equilibration of nuclei containing a large imbalance of protons and neutrons can occur in 3×1022 seconds, according to experiments—important information for models of element-creation in supernovae.

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[Phys. Rev. Lett. 118, 062501] Published Fri Feb 10, 2017



Laser Spectroscopy of the Fine-Structure Splitting in the 2 ^{3} P_{J} Levels of ^{4} He

2017-02-10T10:00:00-05:00

Author(s): X. Zheng, Y. R. Sun, J.-J. Chen, W. Jiang, K. Pachucki, and S.-M. Hu
The fine-structure splitting in the 2^{3}P_{J} (J=0, 1, 2) levels of ^{4}He is of great interest for tests of quantum electrodynamics and for the determination of the fine-structure constant α. The 2^{3}P_{0}−2^{3}P_{2} and 2^{3}P_{1}−2^{3}P_{2} intervals are measured by laser spectroscopy of the ^{…
[Phys. Rev. Lett. 118, 063001] Published Fri Feb 10, 2017



Facilitation Dynamics and Localization Phenomena in Rydberg Lattice Gases with Position Disorder

2017-02-10T10:00:00-05:00

Author(s): Matteo Marcuzzi, Jiří Minář, Daniel Barredo, Sylvain de Léséleuc, Henning Labuhn, Thierry Lahaye, Antoine Browaeys, Emanuele Levi, and Igor Lesanovsky
We explore the dynamics of Rydberg excitations in an optical tweezer array under antiblockade (or facilitation) conditions. Because of the finite temperature the atomic positions are randomly spread, an effect that leads to quenched correlated disorder in the interatomic interaction strengths. This …
[Phys. Rev. Lett. 118, 063606] Published Fri Feb 10, 2017



Self-Channeling of High-Power Long-Wave Infrared Pulses in Atomic Gases

2017-02-10T10:00:00-05:00

Author(s): K. Schuh, M. Kolesik, E. M. Wright, J. V. Moloney, and S. W. Koch
We simulate and elucidate the self-channeling of high-power 10  μm infrared pulses in atomic gases. The major new result is that the peak intensity can remain remarkably stable over many Rayleigh ranges. This arises from the balance between the self-focusing, diffraction, and defocusing caused by th…
[Phys. Rev. Lett. 118, 063901] Published Fri Feb 10, 2017



Kibble-Zurek Scaling in the Yang-Lee Edge Singularity

2017-02-10T10:00:00-05:00

Author(s): Shuai Yin, Guang-Yao Huang, Chung-Yu Lo, and Pochung Chen
We study the driven dynamics across the critical points of the Yang-Lee edge singularities (YLESs) in a finite-size quantum Ising chain with an imaginary symmetry-breaking field. In contrast to the conventional classical or quantum phase transitions, these phase transitions are induced by tuning the…
[Phys. Rev. Lett. 118, 065701] Published Fri Feb 10, 2017



Invariant Fast Diffusion on the Surfaces of Ultrastable and Aged Molecular Glasses

2017-02-10T10:00:00-05:00

Author(s): Yue Zhang and Zahra Fakhraai
Surface diffusion of molecular glasses is found to be orders of magnitude faster than bulk diffusion, with a stronger dependence on the molecular size and intermolecular interactions. In this study, we investigate the effect of variations in bulk dynamics on the surface diffusion of molecular glasse…
[Phys. Rev. Lett. 118, 066101] Published Fri Feb 10, 2017



Quantum Annealing via Environment-Mediated Quantum Diffusion

2017-02-10T10:00:00-05:00

Author(s): Vadim N. Smelyanskiy, Davide Venturelli, Alejandro Perdomo-Ortiz, Sergey Knysh, and Mark I. Dykman
We show that quantum diffusion near a quantum critical point can provide an efficient mechanism of quantum annealing. It is based on the diffusion-mediated recombination of excitations in open systems far from thermal equilibrium. We find that, for an Ising spin chain coupled to a bosonic bath and d…
[Phys. Rev. Lett. 118, 066802] Published Fri Feb 10, 2017



Coexistence of Replica Bands and Superconductivity in FeSe Monolayer Films

2017-02-10T10:00:00-05:00

Author(s): S. N. Rebec, T. Jia, C. Zhang, M. Hashimoto, D.-H. Lu, R. G. Moore, and Z.-X. Shen
To elucidate the mechanisms behind the enhanced T_{c} in monolayer (1 ML) FeSe on SrTiO_{3} (STO), we grew highly strained 1 ML FeSe on the rectangular (100) face of rutile TiO_{2}, and observed the coexistence of replica bands and superconductivity with a T_{c} of 63 K. From the similar T_{c} betwe…
[Phys. Rev. Lett. 118, 067002] Published Fri Feb 10, 2017



Magnetic Field Dependence of Excitations Near Spin-Orbital Quantum Criticality

2017-02-10T10:00:00-05:00

Author(s): A. Biffin, Ch. Rüegg, J. Embs, T. Guidi, D. Cheptiakov, A. Loidl, V. Tsurkan, and R. Coldea
The spinel FeSc_{2}S_{4} has been proposed to realize a near-critical spin-orbital singlet (SOS) state, where entangled spin and orbital moments fluctuate in a global singlet state on the verge of spin and orbital order. Here we report powder inelastic neutron scattering measurements that observe th…
[Phys. Rev. Lett. 118, 067205] Published Fri Feb 10, 2017



Spin Polarization and Attosecond Time Delay in Photoemission from Spin Degenerate States of Solids

2017-02-10T10:00:00-05:00

Author(s): Mauro Fanciulli, Henrieta Volfová, Stefan Muff, Jürgen Braun, Hubert Ebert, Jan Minár, Ulrich Heinzmann, and J. Hugo Dil

Time delay between photon entry and the resulting photoemission from a dispersive band of a solid is determined by measuring the spin polarization of the photoelectrons.

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[Phys. Rev. Lett. 118, 067402] Published Fri Feb 10, 2017



Odd-Integer Quantum Hall States and Giant Spin Susceptibility in p-Type Few-Layer WSe_{2}

2017-02-10T10:00:00-05:00

Author(s): Shuigang Xu, Junying Shen, Gen Long, Zefei Wu, Zhi-qiang Bao, Cheng-Cheng Liu, Xiao Xiao, Tianyi Han, Jiangxiazi Lin, Yingying Wu, Huanhuan Lu, Jianqiang Hou, Liheng An, Yuanwei Wang, Yuan Cai, K. M. Ho, Yuheng He, Rolf Lortz, Fan Zhang, and Ning Wang

Transition metal dichalcogenides in a tilted magnetic field display unconventional quantum Hall transport phenomena, including a Zeeman energy that is almost three times as large as the cyclotron energy.

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[Phys. Rev. Lett. 118, 067702] Published Fri Feb 10, 2017



Jamming of Semiflexible Polymers

2017-02-10T10:00:00-05:00

Author(s): Robert S. Hoy
We study jamming in model freely rotating polymers as a function of chain length N and bond angle θ_{0}. The volume fraction at jamming ϕ_{J}(θ_{0}) is minimal for rigid-rodlike chains (θ_{0}=0), and increases monotonically with increasing θ_{0}≤π/2. In contrast to flexible polymers, marginally jamm…
[Phys. Rev. Lett. 118, 068002] Published Fri Feb 10, 2017



Diffusive and Arrestedlike Dynamics in Currency Exchange Markets

2017-02-10T10:00:00-05:00

Author(s): J. Clara-Rahola, A. M. Puertas, M. A. Sánchez-Granero, J. E. Trinidad-Segovia, and F. J. de las Nieves
This work studies the symmetry between colloidal dynamics and the dynamics of the Euro–U.S. dollar currency exchange market (EURUSD). We consider the EURUSD price in the time range between 2001 and 2015, where we find significant qualitative symmetry between fluctuation distributions from this marke…
[Phys. Rev. Lett. 118, 068301] Published Fri Feb 10, 2017



Unifying Gate Synthesis and Magic State Distillation

2017-02-09T10:00:00-05:00

Author(s): Earl T. Campbell and Mark Howard
The leading paradigm for performing a computation on quantum memories can be encapsulated as distill-then-synthesize. Initially, one performs several rounds of distillation to create high-fidelity magic states that provide one good T gate, an essential quantum logic gate. Subsequently, gate synthesi…
[Phys. Rev. Lett. 118, 060501] Published Thu Feb 09, 2017