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Preview: Recent Articles in Phys. Rev. Lett.

Recent Articles in Phys. Rev. Lett.

Recent articles in Physical Review Letters

Published: 2017-01-20T15:29:20-05:00


Quantum State Discrimination Using the Minimum Average Number of Copies


Author(s): Sergei Slussarenko, Morgan M. Weston, Jun-Gang Li, Nicholas Campbell, Howard M. Wiseman, and Geoff J. Pryde
In the task of discriminating between nonorthogonal quantum states from multiple copies, the key parameters are the error probability and the resources (number of copies) used. Previous studies have considered the task of minimizing the average error probability for fixed resources. Here we introduc…
[Phys. Rev. Lett. 118, 030502] Published Fri Jan 20, 2017

Spatial Bell-State Generation without Transverse Mode Subspace Postselection


Author(s): E. V. Kovlakov, I. B. Bobrov, S. S. Straupe, and S. P. Kulik
Spatial states of single photons and spatially entangled photon pairs are becoming an important resource in quantum communication. This additional degree of freedom provides an almost unlimited information capacity, making the development of high-quality sources of spatial entanglement a well-motiva…
[Phys. Rev. Lett. 118, 030503] Published Fri Jan 20, 2017

Error Suppression for Hamiltonian-Based Quantum Computation Using Subsystem Codes


Author(s): Milad Marvian and Daniel A. Lidar
We present general conditions for quantum error suppression for Hamiltonian-based quantum computation using subsystem codes. This involves encoding the Hamiltonian performing the computation using an error detecting subsystem code and the addition of a penalty term that commutes with the encoded Ham…
[Phys. Rev. Lett. 118, 030504] Published Fri Jan 20, 2017

Dynamic Off-Equilibrium Transition in Systems Slowly Driven across Thermal First-Order Phase Transitions


Author(s): Andrea Pelissetto and Ettore Vicari
We study the off-equilibrium behavior of systems with short-range interactions, slowly driven across a thermal first-order transition, where the equilibrium dynamics is exponentially slow. We consider a dynamics that starts in the high-T phase at time t=t_{i}<0 and ends at t=t_{f}>0 in the low-T phase, with a time-depende…
[Phys. Rev. Lett. 118, 030602] Published Fri Jan 20, 2017

First Passage under Restart


Author(s): Arnab Pal and Shlomi Reuveni
First passage under restart has recently emerged as a conceptual framework suitable for the description of a wide range of phenomena, but the endless variety of ways in which restart mechanisms and first passage processes mix and match hindered the identification of unifying principles and general t…
[Phys. Rev. Lett. 118, 030603] Published Fri Jan 20, 2017

Dynamical Symmetry Breaking and Phase Transitions in Driven Diffusive Systems


Author(s): Yongjoo Baek, Yariv Kafri, and Vivien Lecomte
We study the probability distribution of a current flowing through a diffusive system connected to a pair of reservoirs at its two ends. Sufficient conditions for the occurrence of a host of possible phase transitions both in and out of equilibrium are derived. These transitions manifest themselves …
[Phys. Rev. Lett. 118, 030604] Published Fri Jan 20, 2017

Critical Number of Fields in Stochastic Inflation


Author(s): Vincent Vennin, Hooshyar Assadullahi, Hassan Firouzjahi, Mahdiyar Noorbala, and David Wands
Stochastic effects in generic scenarios of inflation with multiple fields are investigated. First passage time techniques are employed to calculate the statistical moments of the number of inflationary e-folds, which give rise to all correlation functions of primordial curvature perturbations throug…
[Phys. Rev. Lett. 118, 031301] Published Fri Jan 20, 2017

Britto-Cachazo-Feng-Witten–Type Recurrent Relations for Tree Superamplitudes of D=11 Supergravity


Author(s): Igor Bandos
We propose the on-shell superfield description for tree amplitudes of D=11 supergravity and the Britto-Cachazo-Feng-Witten–type recurrent relations for these superamplitudes.
[Phys. Rev. Lett. 118, 031601] Published Fri Jan 20, 2017

Redefining the Axion Window


Author(s): Luca Di Luzio, Federico Mescia, and Enrico Nardi

The region of parameter space corresponding to realistic models in which axions may exist is considerably larger than assumed.

[Phys. Rev. Lett. 118, 031801] Published Fri Jan 20, 2017

Search for B^{+} →K^{+} τ^{+} τ^{−} at the BaBar Experiment


Author(s): J. P. Lees et al. (BaBar Collaboration)
We search for the rare flavor-changing neutral current process B^{+}→K^{+}τ^{+}τ^{−} using data from the BABAR experiment. The data sample, collected at the center-of-mass energy of the ϒ(4S) resonance, corresponds to a total integrated luminosity of 424  fb^{−1} and to 471×10^{6}  BB[over ¯] pairs.…
[Phys. Rev. Lett. 118, 031802] Published Fri Jan 20, 2017

Probing Sub-GeV Dark Matter with Conventional Detectors


Author(s): Chris Kouvaris and Josef Pradler
The direct detection of dark matter particles with mass below the GeV scale is hampered by soft nuclear recoil energies and finite detector thresholds. For a given maximum relative velocity, the kinematics of elastic dark matter nucleus scattering sets a principal limit on detectability. Here, we pr…
[Phys. Rev. Lett. 118, 031803] Published Fri Jan 20, 2017

Octant of θ_{23} in Danger with a Light Sterile Neutrino


Author(s): Sanjib Kumar Agarwalla, Sabya Sachi Chatterjee, and Antonio Palazzo
Present global fits of world neutrino data hint towards nonmaximal θ_{23} with two nearly degenerate solutions, one in the lower octant (θ_{23}π/4). This octant ambiguity of θ_{23} is one of the fundamental issues in the neutrino sector, and its resolution is a crucial goal of next-generation long-b…
[Phys. Rev. Lett. 118, 031804] Published Fri Jan 20, 2017

Nucleus-Dependent Valence-Space Approach to Nuclear Structure


Author(s): S. R. Stroberg, A. Calci, H. Hergert, J. D. Holt, S. K. Bogner, R. Roth, and A. Schwenk
We present a nucleus-dependent valence-space approach for calculating ground and excited states of nuclei, which generalizes the shell-model in-medium similarity renormalization group to an ensemble reference with fractionally filled orbitals. Because the ensemble is used only as a reference, and no…
[Phys. Rev. Lett. 118, 032502] Published Fri Jan 20, 2017

Resolving Vibrational from Electronic Coherences in Two-Dimensional Electronic Spectroscopy: The Role of the Laser Spectrum


Author(s): Franco V. de A. Camargo, Lena Grimmelsmann, Harry L. Anderson, Stephen R. Meech, and Ismael A. Heisler
The observation of coherent quantum effects in photosynthetic light-harvesting complexes prompted the question whether quantum coherence could be exploited to improve the efficiency in new energy materials. The detailed characterization of coherent effects relies on sensitive methods such as two-dim…
[Phys. Rev. Lett. 118, 033001] Published Fri Jan 20, 2017

Vector-Resonance-Multimode Instability


Author(s): S. V. Sergeyev, H. Kbashi, N. Tarasov, Yu. Loiko, and S. A. Kolpakov
The modulation and multimode instabilities are the main mechanisms which drive spontaneous spatial and temporal pattern formation in a vast number of nonlinear systems ranging from biology to laser physics. Using an Er-doped fiber laser as a test bed, here for the first time we demonstrate both expe…
[Phys. Rev. Lett. 118, 033904] Published Fri Jan 20, 2017

Perturbative High Harmonic Wave Front Control


Author(s): Zhengyan Li, Graham Brown, Dong Hyuk Ko, Fanqi Kong, Ladan Arissian, and P. B. Corkum
We pattern the wave front of a high harmonic beam by intersecting the intense driving laser pulse that generates the high harmonic with a weak control pulse. To illustrate the potential of wave-front control, we imprint a Fresnel zone plate pattern on a harmonic beam, causing the harmonics to focus …
[Phys. Rev. Lett. 118, 033905] Published Fri Jan 20, 2017

Experimental Demonstration of Coherent Control in Quantum Chaotic Systems


Author(s): M. Bitter and V. Milner
We experimentally demonstrate coherent control of a quantum system, whose dynamics is chaotic in the classical limit. Interaction of diatomic molecules with a periodic sequence of ultrashort laser pulses leads to the dynamical localization of the molecular angular momentum, a characteristic feature …
[Phys. Rev. Lett. 118, 034101] Published Fri Jan 20, 2017

High-Precision Shock Wave Measurements of Deuterium: Evaluation of Exchange-Correlation Functionals at the Molecular-to-Atomic Transition


Author(s): M. D. Knudson and M. P. Desjarlais
We present shock compression data for deuterium through the molecular-to-atomic transition along the principal Hugoniot with unprecedented precision, enabling discrimination between subtle differences in first-principle theoretical predictions. These observations, supported through reshock measureme…
[Phys. Rev. Lett. 118, 035501] Published Fri Jan 20, 2017

Full Elasticity Tensor from Thermal Diffuse Scattering


Author(s): Björn Wehinger, Alessandro Mirone, Michael Krisch, and Alexeï Bosak
We present a method for the precise determination of the full elasticity tensor from a single crystal diffraction experiment using monochromatic x rays. For the two benchmark systems calcite and magnesium oxide, we show that the measurement of thermal diffuse scattering in the proximity of Bragg ref…
[Phys. Rev. Lett. 118, 035502] Published Fri Jan 20, 2017

Orbitalwise Coordination Number for Predicting Adsorption Properties of Metal Nanocatalysts


Author(s): Xianfeng Ma and Hongliang Xin

A microscopic coordination number affects the macroscopic catalytic properties of metallic nanoparticles.

[Phys. Rev. Lett. 118, 036101] Published Fri Jan 20, 2017

Scaling of Tripartite Entanglement at Impurity Quantum Phase Transitions


Author(s): Abolfazl Bayat
The emergence of a diverging length scale in many-body systems at a quantum phase transition implies that total entanglement has to reach its maximum there. In order to fully characterize this, one has to consider multipartite entanglement as, for instance, bipartite entanglement between individual …
[Phys. Rev. Lett. 118, 036102] Published Fri Jan 20, 2017

Disorder-Driven Metal-Insulator Transitions in Deformable Lattices


Author(s): Domenico Di Sante, Simone Fratini, Vladimir Dobrosavljević, and Sergio Ciuchi
We show that, in the presence of a deformable lattice potential, the nature of the disorder-driven metal-insulator transition is fundamentally changed with respect to the noninteracting (Anderson) scenario. For strong disorder, even a modest electron-phonon interaction is found to dramatically renor…
[Phys. Rev. Lett. 118, 036602] Published Fri Jan 20, 2017

Chiral Second-Sound Collective Modes at the Edge of 2D Systems with a Nontrivial Berry Curvature


Author(s): Alessandro Principi, Mikhail I. Katsnelson, and Alex Levchenko
We study the thermal transport in two-dimensional systems with a nontrivial Berry curvature texture. The physical realizations are many; for the sake of definiteness, we consider undoped graphene gapped by the presence of an aligned hexagonal-boron-nitride substrate. The same phenomenology applies, …
[Phys. Rev. Lett. 118, 036802] Published Fri Jan 20, 2017

Conductivity Contrast and Tunneling Charge Transport in the Vortexlike Ferroelectric Domain Patterns of Multiferroic Hexagonal YMnO_{3}


Author(s): E. Ruff, S. Krohns, M. Lilienblum, D. Meier, M. Fiebig, P. Lunkenheimer, and A. Loidl
We deduce the intrinsic conductivity properties of the ferroelectric domain walls around the topologically protected domain vortex cores in multiferroic YMnO_{3}. This is achieved by performing a careful equivalent-circuit analysis of dielectric spectra measured in single-crystalline samples with di…
[Phys. Rev. Lett. 118, 036803] Published Fri Jan 20, 2017

Minimal Entanglement Witness from Electrical Current Correlations


Author(s): F. Brange, O. Malkoc, and P. Samuelsson
Despite great efforts, an unambiguous demonstration of entanglement of mobile electrons in solid state conductors is still lacking. Investigating theoretically a generic entangler-detector setup, we here show that a witness of entanglement between two flying electron qubits can be constructed from o…
[Phys. Rev. Lett. 118, 036804] Published Fri Jan 20, 2017

Interplay between Magnetism, Superconductivity, and Orbital Order in 5-Pocket Model for Iron-Based Superconductors: Parquet Renormalization Group Study


Author(s): Laura Classen, Rui-Qi Xing, Maxim Khodas, and Andrey V. Chubukov
We report the results of the parquet renormalization group (RG) analysis of the phase diagram of the most general 5-pocket model for Fe-based superconductors. We use as an input the orbital structure of excitations near the five pockets made out of d_{xz}, d_{yz}, and d_{xy} orbitals and argue that …
[Phys. Rev. Lett. 118, 037001] Published Fri Jan 20, 2017

Polarization-Dependent Interference of Coherent Scattering from Orthogonal Dipole Moments of a Resonantly Excited Quantum Dot


Author(s): Disheng Chen, Gary R. Lander, Glenn S. Solomon, and Edward B. Flagg
Resonant photoluminescence excitation (RPLE) spectra of a neutral InGaAs quantum dot show unconventional line shapes that depend on the detection polarization. We characterize this phenomenon by performing polarization-dependent RPLE measurements and simulating the measured spectra with a three-leve…
[Phys. Rev. Lett. 118, 037401] Published Fri Jan 20, 2017

Shear Yielding and Shear Jamming of Dense Hard Sphere Glasses


Author(s): Pierfrancesco Urbani and Francesco Zamponi
We investigate the response of dense hard sphere glasses to a shear strain in a wide range of pressures ranging from the glass transition to the infinite-pressure jamming point. The phase diagram in the density-shear strain plane is calculated analytically using the mean-field infinite-dimensional s…
[Phys. Rev. Lett. 118, 038001] Published Fri Jan 20, 2017

Franson Interference Generated by a Two-Level System


Author(s): M. Peiris, K. Konthasinghe, and A. Muller

Time-energy correlated photon pairs are generated with scattered light from a frequency filtered, resonantly driven quantum dot.

[Phys. Rev. Lett. 118, 030501] Published Thu Jan 19, 2017

Conformal Invariance in Driven Diffusive Systems at High Currents


Author(s): D. Karevski and G. M. Schütz
We consider space-time correlations in driven diffusive systems which undergo a fluctuation into a regime with an atypically large current or dynamical activity. For a single conserved mass we show that the spatiotemporal density correlations in one space dimension are fully determined by conformal …
[Phys. Rev. Lett. 118, 030601] Published Thu Jan 19, 2017

Precise Access to the Molecular-Frame Complex Recombination Dipole through High-Harmonic Spectroscopy


Author(s): S. B. Schoun, A. Camper, P. Salières, R. R. Lucchese, P. Agostini, and L. F. DiMauro
We report on spectral intensity and group delay measurements of the highest-occupied molecular-orbital (HOMO) recombination dipole moment of N_{2} in the molecular-frame using high harmonic spectroscopy. We take advantage of the long-wavelength 1.3  μm driving laser to isolate the HOMO in the near t…
[Phys. Rev. Lett. 118, 033201] Published Thu Jan 19, 2017

Time-Resolved Measurement of Interatomic Coulombic Decay Induced by Two-Photon Double Excitation of Ne_{2}


Author(s): T. Takanashi et al.
The hitherto unexplored two-photon doubly excited states [Ne^{*}(2p^{−1}3s)]_{2} were experimentally identified using the seeded, fully coherent, intense extreme ultraviolet free-electron laser FERMI. These states undergo ultrafast interatomic Coulombic decay (ICD), which predominantly produces sing…
[Phys. Rev. Lett. 118, 033202] Published Thu Jan 19, 2017

Anderson Transition for Classical Transport in Composite Materials


Author(s): N. Benjamin Murphy, Elena Cherkaev, and Kenneth M. Golden
The Anderson transition in solids and optics is a wave phenomenon where disorder induces localization of the wave functions. We find here that the hallmarks of the Anderson transition are exhibited by classical transport at a percolation threshold—without wave interference or scattering effects. As …
[Phys. Rev. Lett. 118, 036401] Published Thu Jan 19, 2017

Abnormal Elasticity of Single-Crystal Magnesiosiderite across the Spin Transition in Earth’s Lower Mantle


Author(s): Suyu Fu, Jing Yang, and Jung-Fu Lin

Measurements of the elastic constants of magnesiosiderite at room temperature and pressures up to 70 GPa show changes in the shear and compressive stress moduli around the material’s spin transition.

[Phys. Rev. Lett. 118, 036402] Published Thu Jan 19, 2017

Probing Intermolecular Coupled Vibrations between Two Molecules


Author(s): Zhumin Han (韩竹敏), Gregory Czap, Chen Xu (徐晨), Chi-lun Chiang (蔣季倫), Dingwang Yuan (袁定旺), Ruqian Wu, and W. Ho

Using a scanning tunneling microscope, researchers detect coupled vibrations between two molecules.

[Phys. Rev. Lett. 118, 036801] Published Thu Jan 19, 2017

Electron Spin Resonance at the Level of 10^{4} Spins Using Low Impedance Superconducting Resonators


Author(s): C. Eichler, A. J. Sigillito, S. A. Lyon, and J. R. Petta
We report on electron spin resonance measurements of phosphorus donors localized in a 200  μm^{2} area below the inductive wire of a lumped element superconducting resonator. By combining quantum limited parametric amplification with a low impedance microwave resonator design, we are able to detect …
[Phys. Rev. Lett. 118, 037701] Published Thu Jan 19, 2017

Discrete Time Crystals: Rigidity, Criticality, and Realizations


Author(s): N. Y. Yao, A. C. Potter, I.-D. Potirniche, and A. Vishwanath

A detailed theoretical recipe for making time crystals has been unveiled and swiftly implemented by two groups using vastly different experimental systems.

[Phys. Rev. Lett. 118, 030401] Published Wed Jan 18, 2017

Are There Signatures of Harmonic Oscillator Shells Far from Stability? First Spectroscopy of ^{110} Zr


Author(s): N. Paul et al.

Spectroscopy measurements of two nominally magic-number isotopes that lie near the neutron dripline show that neither isotope exhibits the states expected for a magic nucleus, challenging existing nuclear shell models.

[Phys. Rev. Lett. 118, 032501] Published Wed Jan 18, 2017

Interaction of Ultraintense Laser Vortices with Plasma Mirrors


Author(s): A. Denoeud, L. Chopineau, A. Leblanc, and F. Quéré

Laser vortex beams can exchange their optical angular momentum with a plasma from which they are reflected.

[Phys. Rev. Lett. 118, 033902] Published Wed Jan 18, 2017

Holography of the Dirac Fluid in Graphene with Two Currents


Author(s): Yunseok Seo, Geunho Song, Philip Kim, Subir Sachdev, and Sang-Jin Sin

A holographic model is proposed for a strongly coupled Dirac fluid that describes graphene near charge neutrality.

[Phys. Rev. Lett. 118, 036601] Published Wed Jan 18, 2017

Editorial: A Decade of Editors’ Suggestions


Author(s): Hugues Chaté
[Phys. Rev. Lett. 118, 030001] Published Tue Jan 17, 2017

Experimental Demonstration of Spontaneous Chirality in a Nonlinear Microresonator


Author(s): Qi-Tao Cao, Heming Wang, Chun-Hua Dong, Hui Jing, Rui-Shan Liu, Xi Chen, Li Ge, Qihuang Gong, and Yun-Feng Xiao
Chirality is an asymmetric property widely found in nature. Here, we propose and demonstrate experimentally the spontaneous emergence of chirality in an on-chip ultrahigh-Q whispering-gallery microresonator, without broken parity or time-reversal symmetry. This counterintuitive effect arises due to …
[Phys. Rev. Lett. 118, 033901] Published Tue Jan 17, 2017

Phononic Frequency Comb via Intrinsic Three-Wave Mixing


Author(s): Adarsh Ganesan, Cuong Do, and Ashwin Seshia

A micromechanical device generates a series of precise, equally spaced vibration frequencies, analogous to the light of the “optical frequency comb,” which has dramatically improved precision measurements.

[Phys. Rev. Lett. 118, 033903] Published Tue Jan 17, 2017

Efficient Electrical Spin Readout of NV^{−} Centers in Diamond


Author(s): Florian M. Hrubesch, Georg Braunbeck, Martin Stutzmann, Friedemann Reinhard, and Martin S. Brandt

Enhanced readout contrast is achieved for the magnetic resonance of nitrogen-vacancy center spins in diamond using a new pulsed detection approach.

[Phys. Rev. Lett. 118, 037601] Published Tue Jan 17, 2017

Influence of the Surface Viscosity on the Breakup of a Surfactant-Laden Drop


Author(s): A. Ponce-Torres, J. M. Montanero, M. A. Herrada, E. J. Vega, and J. M. Vega
We examine both theoretically and experimentally the breakup of a pendant drop loaded with an insoluble surfactant. The experiments show that a significant amount of surfactant is trapped in the resulting satellite droplet. This result contradicts previous theoretical predictions, where the effects …
[Phys. Rev. Lett. 118, 024501] Published Fri Jan 13, 2017

Spectrum of Wind Power Fluctuations


Author(s): M. M. Bandi

A turbulence-based model of wind variations explains observed fluctuations in the power output from wind turbines.

[Phys. Rev. Lett. 118, 028301] Published Fri Jan 13, 2017

Directly Measuring the Degree of Quantum Coherence using Interference Fringes


Author(s): Yi-Tao Wang, Jian-Shun Tang, Zhi-Yuan Wei, Shang Yu, Zhi-Jin Ke, Xiao-Ye Xu, Chuan-Feng Li, and Guang-Can Guo
Quantum coherence is the most distinguished feature of quantum mechanics. It lies at the heart of the quantum-information technologies as the fundamental resource and is also related to other quantum resources, including entanglement. It plays a critical role in various fields, even in biology. Neve…
[Phys. Rev. Lett. 118, 020403] Published Thu Jan 12, 2017

Superfluid Black Holes


Author(s): Robie A. Hennigar, Robert B. Mann, and Erickson Tjoa
We present what we believe is the first example of a “λ-line” phase transition in black hole thermodynamics. This is a line of (continuous) second order phase transitions which in the case of liquid ^{4}He marks the onset of superfluidity. The phase transition occurs for a class of asymptotically an…
[Phys. Rev. Lett. 118, 021301] Published Thu Jan 12, 2017

Search for an Ultralight Scalar Dark Matter Candidate with the AURIGA Detector


Author(s): Antonio Branca, Michele Bonaldi, Massimo Cerdonio, Livia Conti, Paolo Falferi, Francesco Marin, Renato Mezzena, Antonello Ortolan, Giovanni A. Prodi, Luca Taffarello, Gabriele Vedovato, Andrea Vinante, Stefano Vitale, and Jean-Pierre Zendri
A search for a new scalar field, called moduli, has been performed using the cryogenic resonant-mass AURIGA detector. Predicted by string theory, moduli may provide a significant contribution to the dark matter (DM) component of our Universe. If this is the case, the interaction of ordinary matter w…
[Phys. Rev. Lett. 118, 021302] Published Thu Jan 12, 2017

Search for Dark Matter and Supersymmetry with a Compressed Mass Spectrum in the Vector Boson Fusion Topology in Proton-Proton Collisions at sqrt[s] =8 TeV


Author(s): V. Khachatryan et al. (CMS Collaboration)
A first search for pair production of dark matter candidates through vector boson fusion in proton-proton collisions at sqrt[s]=8  TeV is performed with the CMS detector. The vector boson fusion topology enhances missing transverse momentum, providing a way to probe supersymmetry, even in the case o…
[Phys. Rev. Lett. 118, 021802] Published Thu Jan 12, 2017

Chirality of Topological Gap Solitons in Bosonic Dimer Chains


Author(s): D. D. Solnyshkov, O. Bleu, B. Teklu, and G. Malpuech
We study gap solitons which appear in the topological gap of 1D bosonic dimer chains within the mean-field approximation. We find that such solitons have a nontrivial texture of the sublattice pseudospin. We reveal their chiral nature by demonstrating the anisotropy of their behavior in the presence…
[Phys. Rev. Lett. 118, 023901] Published Thu Jan 12, 2017

Interplay of Laser-Plasma Interactions and Inertial Fusion Hydrodynamics


Author(s): D. J. Strozzi, D. S. Bailey, P. Michel, L. Divol, S. M. Sepke, G. D. Kerbel, C. A. Thomas, J. E. Ralph, J. D. Moody, and M. B. Schneider
The effects of laser-plasma interactions (LPI) on the dynamics of inertial confinement fusion hohlraums are investigated via a new approach that self-consistently couples reduced LPI models into radiation-hydrodynamics numerical codes. The interplay between hydrodynamics and LPI—specifically stimula…
[Phys. Rev. Lett. 118, 025002] Published Thu Jan 12, 2017

Stability of Dirac Liquids with Strong Coulomb Interaction


Author(s): Igor S. Tupitsyn and Nikolay V. Prokof’ev
We develop and apply the diagrammatic Monte Carlo technique to address the problem of the stability of the Dirac liquid state (in a graphene-type system) against the strong long-range part of the Coulomb interaction. So far, all attempts to deal with this problem in the field-theoretical framework w…
[Phys. Rev. Lett. 118, 026403] Published Thu Jan 12, 2017

Metal-Insulator Transition and Topological Properties of Pyrochlore Iridates


Author(s): Hongbin Zhang, Kristjan Haule, and David Vanderbilt
Combining density functional theory (DFT) and embedded dynamical mean-field theory (DMFT) methods, we study the metal-insulator transition in R_{2}Ir_{2}O_{7} (R=Y, Eu, Sm, Nd, Pr, and Bi) and the topological nature of the insulating compounds. Accurate free energies evaluated using the charge self-…
[Phys. Rev. Lett. 118, 026404] Published Thu Jan 12, 2017

Doping Evolution of Magnetic Order and Magnetic Excitations in (Sr_{1−x} La_{x} )_{3} Ir_{2} O_{7}


Author(s): Xingye Lu, D. E. McNally, M. Moretti Sala, J. Terzic, M. H. Upton, D. Casa, G. Ingold, G. Cao, and T. Schmitt
We use resonant elastic and inelastic x-ray scattering at the Ir-L_{3} edge to study the doping-dependent magnetic order, magnetic excitations, and spin-orbit excitons in the electron-doped bilayer iridate (Sr_{1−x}La_{x})_{3}Ir_{2}O_{7} (0≤x≤0.065). With increasing doping x, the three-dimensional l…
[Phys. Rev. Lett. 118, 027202] Published Thu Jan 12, 2017

Incommensurate Spiral Order from Double-Exchange Interactions


Author(s): Maria Azhar and Maxim Mostovoy
The double-exchange model describing interactions of itinerant electrons with localized spins is usually used to explain ferromagnetism in metals. We show that for a variety of crystal lattices of different dimensionalities and for a wide range of model parameters, the ferromagnetic state is unstabl…
[Phys. Rev. Lett. 118, 027203] Published Thu Jan 12, 2017

Quasiphase Transition in a Single File of Water Molecules Encapsulated in (6,5) Carbon Nanotubes Observed by Temperature-Dependent Photoluminescence Spectroscopy


Author(s): Xuedan Ma, Sofie Cambré, Wim Wenseleers, Stephen K. Doorn, and Han Htoon

A temperature induced phase transition occurs in water molecules packed single-file inside a carbon nanotube, as shown by photoluminescence measurements and first-principles calculations.

[Phys. Rev. Lett. 118, 027402] Published Thu Jan 12, 2017

Suppression of Beneficial Mutations in Dynamic Microbial Populations


Author(s): Philip Bittihn, Jeff Hasty, and Lev S. Tsimring
Quantitative predictions for the spread of mutations in bacterial populations are essential to interpret evolution experiments and to improve the stability of synthetic gene circuits. We derive analytical expressions for the suppression factor for beneficial mutations in populations that undergo per…
[Phys. Rev. Lett. 118, 028102] Published Thu Jan 12, 2017

Metabolic Trade-Offs Promote Diversity in a Model Ecosystem


Author(s): Anna Posfai, Thibaud Taillefumier, and Ned S. Wingreen

A new ecosystem model, which accounts for metabolic trade-offs between coexisting species, shows that population diversity can increase even when species compete for the same limited nutrients, a finding that replicates nature.

[Phys. Rev. Lett. 118, 028103] Published Thu Jan 12, 2017

Dark Energy from Violation of Energy Conservation


Author(s): Thibaut Josset, Alejandro Perez, and Daniel Sudarsky

A theoretical analysis suggests that quantum mechanical violations of energy conservation may arise in some proposed models of quantum gravity. If realized in nature, these violations could manifest on cosmological scales as an effective cosmological constant.

[Phys. Rev. Lett. 118, 021102] Published Wed Jan 11, 2017

Results from a Search for Dark Matter in the Complete LUX Exposure


Author(s): D. S. Akerib et al. (LUX Collaboration)

No dark matter particles have been observed by two of the world’s most sensitive direct-detection experiments, casting doubt on a favored dark matter model.

[Phys. Rev. Lett. 118, 021303] Published Wed Jan 11, 2017

Symmetry Protection of Critical Phases and a Global Anomaly in 1+1 Dimensions


Author(s): Shunsuke C. Furuya and Masaki Oshikawa
We derive a selection rule among the (1+1)-dimensional SU(2) Wess-Zumino-Witten theories, based on the global anomaly of the discrete Z_{2} symmetry found by Gepner and Witten. In the presence of both the SU(2) and Z_{2} symmetries, a renormalization-group flow is possible between level-k and level-…
[Phys. Rev. Lett. 118, 021601] Published Wed Jan 11, 2017

Observation of J/ψϕ Structures Consistent with Exotic States from Amplitude Analysis of B^{+} →J/ψϕK^{+} Decays


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

The LHCb collaboration has identified four new structures in B+ decays that are likely to be tetraquark states. These tetraquark systems contain neither of the light u and d quarks.

[Phys. Rev. Lett. 118, 022003] Published Wed Jan 11, 2017

Bootstrapping Rapidity Anomalous Dimensions for Transverse-Momentum Resummation


Author(s): Ye Li and Hua Xing Zhu
A soft function relevant for transverse-momentum resummation for Drell-Yan or Higgs production at hadron colliders is computed through to three loops in the expansion of strong coupling, with the help of the bootstrap technique and supersymmetric decomposition. The corresponding rapidity anomalous d…
[Phys. Rev. Lett. 118, 022004] Published Wed Jan 11, 2017

Connected and Leading Disconnected Hadronic Light-by-Light Contribution to the Muon Anomalous Magnetic Moment with a Physical Pion Mass


Author(s): Thomas Blum, Norman Christ, Masashi Hayakawa, Taku Izubuchi, Luchang Jin, Chulwoo Jung, and Christoph Lehner
We report a lattice QCD calculation of the hadronic light-by-light contribution to the muon anomalous magnetic moment at a physical pion mass. The calculation includes the connected diagrams and the leading, quark-line-disconnected diagrams. We incorporate algorithmic improvements developed in our p…
[Phys. Rev. Lett. 118, 022005] Published Wed Jan 11, 2017

Two-Photon X-Ray Diffraction


Author(s): J. Stöhr

Conventional diffraction theory is predicted to break down for x-rays when spontaneous scattering is replaced by stimulated scattering by a thin film source. The stimulated diffraction pattern generated by the cooperative interaction of two coherent, unentangled photons results in self-focussing beyond the diffraction limit.  

[Phys. Rev. Lett. 118, 024801] Published Wed Jan 11, 2017

Triaxial-Stress-Induced Homogeneous Hysteresis-Free First-Order Phase Transformations with Stable Intermediate Phases


Author(s): Valery I. Levitas, Hao Chen, and Liming Xiong
Starting with thermodynamic predictions and following with molecular dynamics simulations, special triaxial compression-tension states were found for which the stresses for the instability of the crystal lattice of silicon (Si) are the same for direct and reverse phase transformations (PTs) between …
[Phys. Rev. Lett. 118, 025701] Published Wed Jan 11, 2017

Observation of a Charge Density Wave Incommensuration Near the Superconducting Dome in Cu_{x} TiSe_{2}


Author(s): A. Kogar, G. A. de la Pena, Sangjun Lee, Y. Fang, S. X.-L. Sun, D. B. Lioi, G. Karapetrov, K. D. Finkelstein, J. P. C. Ruff, P. Abbamonte, and S. Rosenkranz
X-ray diffraction was employed to study the evolution of the charge density wave (CDW) in Cu_{x}TiSe_{2} as a function of copper intercalation in order to clarify the relationship between the CDW and superconductivity. The results show a CDW incommensuration arising at an intercalation value coincid…
[Phys. Rev. Lett. 118, 027002] Published Wed Jan 11, 2017

Noise, Diffusion, and Hyperuniformity


Author(s): Daniel Hexner and Dov Levine
We consider driven many-particle models which have a phase transition between an active and an absorbing phase. Like previously studied models, we have particle conservation, but here we introduce an additional symmetry—when two particles interact, we give them stochastic kicks which conserve the ce…
[Phys. Rev. Lett. 118, 020601] Published Tue Jan 10, 2017

Fast Pairwise Conversion of Supernova Neutrinos: A Dispersion Relation Approach


Author(s): Ignacio Izaguirre, Georg Raffelt, and Irene Tamborra
Collective pair conversion ν_{e}ν[over ¯]_{e}↔ν_{x}ν[over ¯]_{x} by forward scattering, where x=μ or τ, may be generic for supernova neutrino transport. Depending on the local angular intensity of the electron lepton number carried by neutrinos, the conversion rate can be “fast,” i.e., of the order …
[Phys. Rev. Lett. 118, 021101] Published Tue Jan 10, 2017

Ultrafast Spin-State Dynamics in Transition-Metal Complexes Triggered by Soft-X-Ray Light


Author(s): Huihui Wang, Sergey I. Bokarev, Saadullah G. Aziz, and Oliver Kühn
Recent advances in attosecond physics provide access to the correlated motion of valence and core electrons on their intrinsic timescales. For valence excitations, processes related to the electron spin are usually driven by nuclear motion. For core-excited states, where the core hole has a nonzero …
[Phys. Rev. Lett. 118, 023001] Published Tue Jan 10, 2017

Relativistic Coupled Cluster Calculations with Variational Quantum Electrodynamics Resolve the Discrepancy between Experiment and Theory Concerning the Electron Affinity and Ionization Potential of Gold


Author(s): L. F. Pašteka, E. Eliav, A. Borschevsky, U. Kaldor, and P. Schwerdtfeger

A long-standing discrepancy between experiments and theory concerning the electronic properties of gold has now been resolved.

[Phys. Rev. Lett. 118, 023002] Published Tue Jan 10, 2017

Thermodynamic and Kinetic Properties of Shocks in Two-Dimensional Yukawa Systems


Author(s): M. Marciante and M. S. Murillo
Particle-level simulations of shocked plasmas are carried out to examine kinetic properties not captured by hydrodynamic models. In particular, molecular dynamics simulations of 2D Yukawa plasmas with variable couplings and screening lengths are used to examine shock features unique to plasmas, incl…
[Phys. Rev. Lett. 118, 025001] Published Tue Jan 10, 2017

Biochemical Machines for the Interconversion of Mutual Information and Work


Author(s): Thomas McGrath, Nick S. Jones, Pieter Rein ten Wolde, and Thomas E. Ouldridge

An enzyme in a chemical bath can act as an autonomous biochemical device that exploits information to do work.

[Phys. Rev. Lett. 118, 028101] Published Tue Jan 10, 2017

Quantum State Tomography via Reduced Density Matrices


Author(s): Tao Xin, Dawei Lu, Joel Klassen, Nengkun Yu, Zhengfeng Ji, Jianxin Chen, Xian Ma, Guilu Long, Bei Zeng, and Raymond Laflamme
Quantum state tomography via local measurements is an efficient tool for characterizing quantum states. However, it requires that the original global state be uniquely determined (UD) by its local reduced density matrices (RDMs). In this work, we demonstrate for the first time a class of states that…
[Phys. Rev. Lett. 118, 020401] Published Mon Jan 09, 2017

Quantum Steering Inequality with Tolerance for Measurement-Setting Errors: Experimentally Feasible Signature of Unbounded Violation


Author(s): Adam Rutkowski, Adam Buraczewski, Paweł Horodecki, and Magdalena Stobińska
Quantum steering is a relatively simple test for proving that the values of quantum-mechanical measurement outcomes come into being only in the act of measurement. By exploiting quantum correlations, Alice can influence—steer—Bob’s physical system in a way that is impossible in classical mechanics, …
[Phys. Rev. Lett. 118, 020402] Published Mon Jan 09, 2017

General Approach to Quantum Channel Impossibility by Local Operations and Classical Communication


Author(s): Scott M. Cohen
We describe a general approach to proving the impossibility of implementing a quantum channel by local operations and classical communication (LOCC), even with an infinite number of rounds, and find that this can often be demonstrated by solving a set of linear equations. The method also allows one …
[Phys. Rev. Lett. 118, 020501] Published Mon Jan 09, 2017

Driven Boson Sampling


Author(s): Sonja Barkhofen, Tim J. Bartley, Linda Sansoni, Regina Kruse, Craig S. Hamilton, Igor Jex, and Christine Silberhorn
Sampling the distribution of bosons that have undergone a random unitary evolution is strongly believed to be a computationally hard problem. Key to outperforming classical simulations of this task is to increase both the number of input photons and the size of the network. We propose driven boson s…
[Phys. Rev. Lett. 118, 020502] Published Mon Jan 09, 2017

First Experimental Study of Photon Polarization in Radiative B_{s}^{0} Decays


Author(s): R. Aaij et al. (LHCb Collaboration)
The polarization of photons produced in radiative B_{s}^{0} decays is studied for the first time. The data are recorded by the LHCb experiment in pp collisions corresponding to an integrated luminosity of 3  fb^{−1} at center-of-mass energies of 7 and 8 TeV. A time-dependent analysis of the B_{s}^{0…
[Phys. Rev. Lett. 118, 021801] Published Mon Jan 09, 2017

η→3π: Study of the Dalitz Plot and Extraction of the Quark Mass Ratio Q


Author(s): Gilberto Colangelo, Stefan Lanz, Heinrich Leutwyler, and Emilie Passemar
The η→3π amplitude is sensitive to the quark mass difference m_{u}−m_{d} and offers a unique way to determine the quark mass ratio Q^{2}≡(m_{s}^{2}−m_{ud}^{2})/(m_{d}^{2}−m_{u}^{2}) from experiment. We calculate the amplitude dispersively and fit the KLOE Collaboration data on the charged mode, vary…
[Phys. Rev. Lett. 118, 022001] Published Mon Jan 09, 2017

Isoscalar ππ Scattering and the σ Meson Resonance from QCD


Author(s): Raul A. Briceño, Jozef J. Dudek, Robert G. Edwards, and David J. Wilson (for the Hadron Spectrum Collaboration)
We present for the first time a determination of the energy dependence of the isoscalar ππ elastic scattering phase shift within a first-principles numerical lattice approach to QCD. Hadronic correlation functions are computed including all required quark propagation diagrams, and from these the dis…
[Phys. Rev. Lett. 118, 022002] Published Mon Jan 09, 2017

Modification of the Porter-Thomas Distribution by Rank-One Interaction


Author(s): E. Bogomolny
The Porter-Thomas (PT) distribution of resonance widths is one of the oldest and simplest applications of statistical ideas in nuclear physics. Previous experimental data confirmed it quite well, but recent and more careful investigations show clear deviations from this distribution. To explain thes…
[Phys. Rev. Lett. 118, 022501] Published Mon Jan 09, 2017

Simultaneous Microscopic Description of Nuclear Level Density and Radiative Strength Function


Author(s): N. Quang Hung, N. Dinh Dang, and L. T. Quynh Huong
The nuclear level density (NLD) and radiative strength function (RSF) are simultaneously described within a microscopic approach, which takes into account the thermal effects of the exact pairing as well as the giant resonances within the phonon-damping model. The good agreement between the results …
[Phys. Rev. Lett. 118, 022502] Published Mon Jan 09, 2017

Spectral Shearing of Quantum Light Pulses by Electro-Optic Phase Modulation


Author(s): Laura J. Wright, Michał Karpiński, Christoph Söller, and Brian J. Smith
Frequency conversion of nonclassical light enables robust encoding of quantum information based upon spectral multiplexing that is particularly well-suited to integrated-optics platforms. Here we present an intrinsically deterministic linear-optics approach to spectral shearing of quantum light puls…
[Phys. Rev. Lett. 118, 023601] Published Mon Jan 09, 2017

Channeling of Branched Flow in Weakly Scattering Anisotropic Media


Author(s): Henri Degueldre, Jakob J. Metzger, Erik Schultheis, and Ragnar Fleischmann

A theoretical analysis of wave propagation through anisotropic media shows unexpected collective effects occur.

[Phys. Rev. Lett. 118, 024301] Published Mon Jan 09, 2017

Ultrafast X-Ray Diffraction Studies of the Phase Transitions and Equation of State of Scandium Shock Compressed to 82 GPa


Author(s): R. Briggs, M. G. Gorman, A. L. Coleman, R. S. McWilliams, E. E. McBride, D. McGonegle, J. S. Wark, L. Peacock, S. Rothman, S. G. Macleod, C. A. Bolme, A. E. Gleason, G. W. Collins, J. H. Eggert, D. E. Fratanduono, R. F. Smith, E. Galtier, E. Granados, H. J. Lee, B. Nagler, I. Nam, Z. Xing, and M. I. McMahon
Using x-ray diffraction at the Linac Coherent Light Source x-ray free-electron laser, we have determined simultaneously and self-consistently the phase transitions and equation of state (EOS) of the lightest transition metal, scandium, under shock compression. On compression scandium undergoes a str…
[Phys. Rev. Lett. 118, 025501] Published Mon Jan 09, 2017

Absolute Binding Energies of Core Levels in Solids from First Principles


Author(s): Taisuke Ozaki and Chi-Cheng Lee
A general method is presented to calculate absolute binding energies of core levels in metals and insulators, based on a penalty functional and an exact Coulomb cutoff method in the framework of density functional theory. The spurious interaction of core holes between supercells is avoided by the ex…
[Phys. Rev. Lett. 118, 026401] Published Mon Jan 09, 2017

Correlated Band Structure of a Transition Metal Oxide ZnO Obtained from a Many-Body Wave Function Theory


Author(s): Masayuki Ochi, Ryotaro Arita, and Shinji Tsuneyuki
Obtaining accurate band structures of correlated solids has been one of the most important and challenging problems in first-principles electronic structure calculation. There have been promising recent active developments of wave function theory for condensed matter, but its application to band-str…
[Phys. Rev. Lett. 118, 026402] Published Mon Jan 09, 2017

Emergent Gauge Fields from Curvature in Single Layers of Transition-Metal Dichalcogenides


Author(s): Héctor Ochoa, Ricardo Zarzuela, and Yaroslav Tserkovnyak
We analyze the electron dynamics in corrugated layers of transition-metal dichalcogenides. Due to the strong spin-orbit coupling, the intrinsic (Gaussian) curvature leads to an emergent gauge field associated with the Berry connection of the spinor wave function. We discuss the gauge field created b…
[Phys. Rev. Lett. 118, 026801] Published Mon Jan 09, 2017

Kerr Effect from Diffractive Skew Scattering in Chiral p_{x} ±ip_{y} Superconductors


Author(s): Elio J. König and Alex Levchenko
We calculate the temperature dependent anomalous ac Hall conductance σ_{H}(Ω,T) for a two-dimensional chiral p-wave superconductor. This quantity determines the polar Kerr effect, as it was observed in Sr_{2}RuO_{4} [J. Xia et al., Phys. Rev. Lett. 97, 167002 (2006)]. We concentrate on a single band…
[Phys. Rev. Lett. 118, 027001] Published Mon Jan 09, 2017

Robust Zero-Field Skyrmion Formation in FeGe Epitaxial Thin Films


Author(s): J. C. Gallagher, K. Y. Meng, J. T. Brangham, H. L. Wang, B. D. Esser, D. W. McComb, and F. Y. Yang
B20 phase magnetic materials have been of significant interest because they enable magnetic Skyrmions. One major effort in this emerging field is the stabilization of Skyrmions at room temperature and zero magnetic field. We grow phase-pure, high crystalline quality FeGe epitaxial films on Si(111). …
[Phys. Rev. Lett. 118, 027201] Published Mon Jan 09, 2017

Multiple Supersonic Phase Fronts Launched at a Complex-Oxide Heterointerface


Author(s): M. Först, K. R. Beyerlein, R. Mankowsky, W. Hu, G. Mattoni, S. Catalano, M. Gibert, O. Yefanov, J. N. Clark, A. Frano, J. M. Glownia, M. Chollet, H. Lemke, B. Moser, S. P. Collins, S. S. Dhesi, A. D. Caviglia, J.-M. Triscone, and A. Cavalleri
Selective optical excitation of a substrate lattice can drive phase changes across heterointerfaces. This phenomenon is a nonequilibrium analogue of static strain control in heterostructures and may lead to new applications in optically controlled phase change devices. Here, we make use of time-reso…
[Phys. Rev. Lett. 118, 027401] Published Mon Jan 09, 2017

Erratum: Carbon Honeycomb High Capacity Storage for Gaseous and Liquid Species [Phys. Rev. Lett. 116, 055501 (2016)]


Author(s): Nina V. Krainyukova and Evgeniy N. Zubarev
[Phys. Rev. Lett. 118, 029901] Published Mon Jan 09, 2017

Experimental Demonstration of Direct Path State Characterization by Strongly Measuring Weak Values in a Matter-Wave Interferometer


Author(s): Tobias Denkmayr, Hermann Geppert, Hartmut Lemmel, Mordecai Waegell, Justin Dressel, Yuji Hasegawa, and Stephan Sponar
A method was recently proposed and experimentally realized for characterizing a quantum state by directly measuring its complex probability amplitudes in a particular basis using so-called weak values. Recently, Vallone and Dequal [Phys. Rev. Lett. 116, 040502 (2016)] showed theoretically that weak …
[Phys. Rev. Lett. 118, 010402] Published Fri Jan 06, 2017

Stochastic Thermodynamics of Learning


Author(s): Sebastian Goldt and Udo Seifert
Virtually every organism gathers information about its noisy environment and builds models from those data, mostly using neural networks. Here, we use stochastic thermodynamics to analyze the learning of a classification rule by a neural network. We show that the information acquired by the network …
[Phys. Rev. Lett. 118, 010601] Published Fri Jan 06, 2017

Fermi Large Area Telescope as a Galactic Supernovae Axionscope


Author(s): M. Meyer, M. Giannotti, A. Mirizzi, J. Conrad, and M. A. Sánchez-Conde
In a Galactic core-collapse supernova (SN), axionlike particles (ALPs) could be emitted via the Primakoff process and eventually convert into γ rays in the magnetic field of the Milky Way. From a data-driven sensitivity estimate, we find that, for a SN exploding in our Galaxy, the Fermi Large Area T…
[Phys. Rev. Lett. 118, 011103] Published Fri Jan 06, 2017

Gravitational Waves from Oscillons after Inflation


Author(s): Stefan Antusch, Francesco Cefalà, and Stefano Orani
We investigate the production of gravitational waves during preheating after inflation in the common case of field potentials that are asymmetric around the minimum. In particular, we study the impact of oscillons, comparatively long lived and spatially localized regions where a scalar field (e.g., …
[Phys. Rev. Lett. 118, 011303] Published Fri Jan 06, 2017

Nonsupersymmetric Dualities from Mirror Symmetry


Author(s): Shamit Kachru, Michael Mulligan, Gonzalo Torroba, and Huajia Wang
We study supersymmetry breaking perturbations of the simplest dual pair of (2+1)-dimensional N=2 supersymmetric field theories—the free chiral multiplet and N=2 super QED with a single flavor. We find dual descriptions of a phase diagram containing four distinct massive phases. The equivalence of th…
[Phys. Rev. Lett. 118, 011602] Published Fri Jan 06, 2017

Minkowski Flux Vacua of Type II Supergravities


Author(s): David Andriot, Johan Blåbäck, and Thomas Van Riet
We study flux compactifications of 10D type II supergravities to 4D Minkowski space-time, supported by parallel orientifold O_{p} planes with 3≤p≤8. With some geometric restrictions, the 4D Ricci scalar can be written as a negative sum of squares involving Bogomol’nyi-Prasad-Sommerfield-like conditi…
[Phys. Rev. Lett. 118, 011603] Published Fri Jan 06, 2017

Fragmented Superradiance of a Bose-Einstein Condensate in an Optical Cavity


Author(s): Axel U. J. Lode and Christoph Bruder
The Dicke model and the superradiance of two-level systems in a radiation field have many applications. Recently, a Dicke quantum phase transition has been realized with a Bose-Einstein condensate in a cavity. We numerically solve the many-body Schrödinger equation and study correlations in the grou…
[Phys. Rev. Lett. 118, 013603] Published Fri Jan 06, 2017