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# Recent Articles in Phys. Rev. Lett.

## Recent articles in Physical Review Letters

Published: 2017-04-21T14:59:40-04:00

Gaussian States Minimize the Output Entropy of One-Mode Quantum Gaussian Channels

2017-04-21T10:00:00-04:00

Author(s): Giacomo De Palma, Dario Trevisan, and Vittorio Giovannetti
We prove the long-standing conjecture stating that Gaussian thermal input states minimize the output von Neumann entropy of one-mode phase-covariant quantum Gaussian channels among all the input states with a given entropy. Phase-covariant quantum Gaussian channels model the attenuation and the nois…
[Phys. Rev. Lett. 118, 160503] Published Fri Apr 21, 2017

Proposal for Observing the Unruh Effect using Classical Electrodynamics

2017-04-21T10:00:00-04:00

Author(s): Gabriel Cozzella, André G. S. Landulfo, George E. A. Matsas, and Daniel A. T. Vanzella
Although the Unruh effect can be rigorously considered as well tested as free quantum field theory itself, it would be nice to provide experimental evidence of its existence. This is not easy because the linear acceleration needed to reach a temperature 1 K is of order 10^{20}  m/s^{2}. Here, we pro…
[Phys. Rev. Lett. 118, 161102] Published Fri Apr 21, 2017

Mass-Discrepancy Acceleration Relation: A Natural Outcome of Galaxy Formation in Cold Dark Matter Halos

2017-04-21T10:00:00-04:00

Author(s): Aaron D. Ludlow, Alejandro Benítez-Llambay, Matthieu Schaller, Tom Theuns, Carlos S. Frenk, Richard Bower, Joop Schaye, Robert A. Crain, Julio F. Navarro, Azadeh Fattahi, and Kyle A. Oman

Analysis of the acceleration profiles of galaxies identified in simulations of a cold dark matter universe confirms a previous finding that total acceleration correlates strongly with the baryonic acceleration in rotationally supported galaxies.

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[Phys. Rev. Lett. 118, 161103] Published Fri Apr 21, 2017

New Relations for Gauge-Theory and Gravity Amplitudes at Loop Level

2017-04-21T10:00:00-04:00

Author(s): Song He and Oliver Schlotterer
In this Letter, we extend the tree-level Kawai-Lewellen-Tye (KLT) and Bern-Carrasco-Johansson (BCJ) amplitude relations to loop integrands of gauge theory and gravity. By rearranging the propagators of gauge and gravity loop integrands, we propose the first manifestly gauge- and diffeomorphism-invar…
[Phys. Rev. Lett. 118, 161601] Published Fri Apr 21, 2017

New Limits on Bosonic Dark Matter, Solar Axions, Pauli Exclusion Principle Violation, and Electron Decay from the Majorana Demonstrator

2017-04-21T10:00:00-04:00

Author(s): N. Abgrall et al. (Majorana Collaboration)
We present new limits on exotic keV-scale physics based on 478 kg d of Majorana Demonstrator commissioning data. Constraints at the 90% confidence level are derived on bosonic dark matter (DM) and solar axion couplings, Pauli exclusion principle violating (PEPV) decay, and electron decay using monoe…
[Phys. Rev. Lett. 118, 161801] Published Fri Apr 21, 2017

Flow Dominance and Factorization of Transverse Momentum Correlations in Pb-Pb Collisions at the LHC

2017-04-21T10:00:00-04:00

Author(s): J. Adam et al. (ALICE Collaboration)
We present the first measurement of the two-particle transverse momentum differential correlation function, P_{2}≡⟨Δp_{T}Δp_{T}⟩/⟨p_{T}⟩^{2}, in Pb-Pb collisions at sqrt[s_{NN}]=2.76  TeV. Results for P_{2} are reported as a function of the relative pseudorapidity (Δη) and azimuthal angle (Δφ) betwe…
[Phys. Rev. Lett. 118, 162302] Published Fri Apr 21, 2017

Strong Field Theories beyond Dipole Approximations in Nonrelativistic Regimes

2017-04-21T10:00:00-04:00

Author(s): Pei-Lun He, Di Lao, and Feng He
The exact nondipole Volkov solutions to the Schrödinger equation and Pauli equation are found, based on which a strong field theory beyond the dipole approximation is built for describing the nondipole effects in nonrelativistic laser driven electron dynamics. This theory is applied to investigate m…
[Phys. Rev. Lett. 118, 163203] Published Fri Apr 21, 2017

Detector-Independent Verification of Quantum Light

2017-04-21T10:00:00-04:00

Author(s): J. Sperling, W. R. Clements, A. Eckstein, M. Moore, J. J. Renema, W. S. Kolthammer, S. W. Nam, A. Lita, T. Gerrits, W. Vogel, G. S. Agarwal, and I. A. Walmsley

Criteria are formulated and experimentally verified for optical measurement schemes that probe nonclassical properties of light and are independent of the detector architecture used.

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[Phys. Rev. Lett. 118, 163602] Published Fri Apr 21, 2017

Isotope Effects on Trapped-Electron-Mode Driven Turbulence and Zonal Flows in Helical and Tokamak Plasmas

2017-04-21T10:00:00-04:00

Author(s): Motoki Nakata, Masanori Nunami, Hideo Sugama, and Tomo-Hiko Watanabe
Impacts of isotope ion mass on trapped-electron-mode (TEM)-driven turbulence and zonal flows in magnetically confined fusion plasmas are investigated. Gyrokinetic simulations of TEM-driven turbulence in three-dimensional magnetic configuration of helical plasmas with hydrogen isotope ions and real-m…
[Phys. Rev. Lett. 118, 165002] Published Fri Apr 21, 2017

Buckling of an Elastic Ridge: Competition between Wrinkles and Creases

2017-04-21T10:00:00-04:00

Author(s): C. Lestringant, C. Maurini, A. Lazarus, and B. Audoly
We investigate the elastic buckling of a triangular prism made of a soft elastomer. A face of the prism is bonded to a stiff slab that imposes an average axial compression. We observe two possible buckling modes which are localized along the free ridge. For ridge angles ϕ below a critical value ϕ^{⋆…
[Phys. Rev. Lett. 118, 165501] Published Fri Apr 21, 2017

Spin-Hall Voltage over a Large Length Scale in Bulk Germanium

2017-04-21T10:00:00-04:00

Author(s): F. Bottegoni, C. Zucchetti, S. Dal Conte, J. Frigerio, E. Carpene, C. Vergnaud, M. Jamet, G. Isella, F. Ciccacci, G. Cerullo, and M. Finazzi

Germanium produces a surprisingly large separation of electron spins in response to electric current—good news for spin-based devices, since germanium is highly compatible with silicon.

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[Phys. Rev. Lett. 118, 167402] Published Fri Apr 21, 2017

Evidence and Limits of Universal Topological Surface Segregation of Cyclic Polymers

2017-04-21T10:00:00-04:00

Author(s): Qiming He, Shih-Fan Wang, Renfeng Hu, Bulent Akgun, Caleb Tormey, Somesh Peri, David T. Wu, and Mark D. Foster
If you mix lines and circles, what happens at the edge of the mixture? The problem is simply stated, but the answer is not obvious. Twenty years ago it was proposed that a universal topological driving force would drive cyclic chains to enrich the surface of blends of linear and cyclic chains. Here …
[Phys. Rev. Lett. 118, 167801] Published Fri Apr 21, 2017

Black Hole Spectroscopy with Coherent Mode Stacking

2017-04-20T10:00:00-04:00

Author(s): Huan Yang, Kent Yagi, Jonathan Blackman, Luis Lehner, Vasileios Paschalidis, Frans Pretorius, and Nicolás Yunes

Stacking up gravitational-wave “ringdown” signals from a set of black hole mergers increases the sensitivity of the signals to black hole properties.

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[Phys. Rev. Lett. 118, 161101] Published Thu Apr 20, 2017

Relative Modification of Prompt ψ(2S) and J/ψ Yields from pp to PbPb Collisions at sqrt[s_{NN} ] =5.02 TeV

2017-04-20T10:00:00-04:00

Author(s): A. M. Sirunyan et al. (CMS Collaboration)
The relative modification of the prompt ψ(2S) and J/ψ yields from pp to PbPb collisions, at the center-of-mass energy of 5.02 TeV per nucleon pair, is presented. The analysis is based on pp and PbPb data samples collected by the CMS experiment at the LHC in 2015, corresponding to integrated luminosi…
[Phys. Rev. Lett. 118, 162301] Published Thu Apr 20, 2017

Multifaceted Quadruplet of Low-Lying Spin-Zero States in ^{66} Ni: Emergence of Shape Isomerism in Light Nuclei

2017-04-20T10:00:00-04:00

Author(s): S. Leoni et al.

Shape isomers are measured in ${}^{66}$Ni, the lightest nuclei to date in which this behavior has been observed.

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[Phys. Rev. Lett. 118, 162502] Published Thu Apr 20, 2017

Emergence of Huge Negative Spin-Transfer Torque in Atomically Thin Co layers

2017-04-20T10:00:00-04:00

Author(s): Soong-Geun Je, Sang-Cheol Yoo, Joo-Sung Kim, Yong-Keun Park, Min-Ho Park, Joon Moon, Byoung-Chul Min, and Sug-Bong Choe

Experiments on ultrathin magnetic films show that spin-transfer torque has a much larger effect on spin transport than previously thought. This finding indicates a new way to manipulate magnetic domain walls in these materials.

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[Phys. Rev. Lett. 118, 167205] Published Thu Apr 20, 2017

Magnetic-Order Crossover in Coupled Spin Ladders

2017-04-20T10:00:00-04:00

Author(s): M. Jeong (정민기), H. Mayaffre, C. Berthier, D. Schmidiger, A. Zheludev, and M. Horvatić
We report a novel crossover behavior in the long-range-ordered phase of a prototypical spin-1/2 Heisenberg antiferromagnetic ladder compound (C_{7}H_{10}N)_{2}CuBr_{4}. The staggered order was previously evidenced from a continuous and symmetric splitting of ^{14}N NMR spectral lines on lowering the…
[Phys. Rev. Lett. 118, 167206] Published Thu Apr 20, 2017

Consequences of Spin-Orbit Coupling at the Single Hole Level: Spin-Flip Tunneling and the Anisotropic g Factor

2017-04-20T10:00:00-04:00

Author(s): A. Bogan, S. A. Studenikin, M. Korkusinski, G. C. Aers, L. Gaudreau, P. Zawadzki, A. S. Sachrajda, L. A. Tracy, J. L. Reno, and T. W. Hargett
Hole transport experiments were performed on a gated double quantum dot device defined in a p-GaAs/AlGaAs heterostructure with a single hole occupancy in each dot. The charging diagram of the device was mapped out using charge detection confirming that the single hole limit is reached. In that limit…
[Phys. Rev. Lett. 118, 167701] Published Thu Apr 20, 2017

Mechanism for Amplitude Alternans in Electrocardiograms and the Initiation of Spatiotemporal Chaos

2017-04-20T10:00:00-04:00

Author(s): Diandian Diana Chen, Richard A. Gray, Ilija Uzelac, Conner Herndon, and Flavio H. Fenton
It is widely believed that one major life-threatening transition to chaotic fibrillation occurs via spiral-wave breakup that is preceded by spatiotemporal dispersion of refractoriness due to alternations in the duration of the cardiac action potential (AP). However, recent clinical and experimental …
[Phys. Rev. Lett. 118, 168101] Published Thu Apr 20, 2017

Publisher’s Note: Limits on Lorentz Invariance Violation from Coulomb Interactions in Nuclei and Atoms [Phys. Rev. Lett. 118, 142501 (2017)]

2017-04-20T10:00:00-04:00

Author(s): V. V. Flambaum and M. V. Romalis
[Phys. Rev. Lett. 118, 169905] Published Thu Apr 20, 2017

Neutron Generation by Laser-Driven Spherically Convergent Plasma Fusion

2017-04-19T10:00:00-04:00

Author(s): G. Ren, J. Yan, J. Liu, K. Lan, Y. H. Chen, W. Y. Huo, Z. Fan, X. Zhang, J. Zheng, Z. Chen, W. Jiang, L. Chen, Q. Tang, Z. Yuan, F. Wang, S. Jiang, Y. Ding, W. Zhang, and X. T. He

A new laser-driven fusion method could lead to a robust and efficient way to generate neutrons for use in materials science, geology, and other fields.

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[Phys. Rev. Lett. 118, 165001] Published Wed Apr 19, 2017

Environmentally Mediated Coherent Control of a Spin Qubit in Diamond

2017-04-19T10:00:00-04:00

Author(s): Scott E. Lillie, David A. Broadway, James D. A. Wood, David A. Simpson, Alastair Stacey, Jean-Philippe Tetienne, and Lloyd C. L. Hollenberg

The state of a diamond nitrogen-vacancy spin qubit is controlled by resonances with neighboring spins, offering a new way to control spin qubits.

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[Phys. Rev. Lett. 118, 167204] Published Wed Apr 19, 2017

Theoretical Confirmation of the Low Experimental 3C/3D f-Value Ratio in Fe xvii

2017-04-18T10:00:00-04:00

Author(s): C. Mendoza and M. A. Bautista
Radiative transition probabilities (A values) are computed for the Fe xvii L-shell lines in a Breit-Pauli configuration-interaction method with the autostructure atomic structure code. It is shown that, by carefully taking into account the fine-tuning of the relativistic coupling and 2p-orbital rela…
[Phys. Rev. Lett. 118, 163002] Published Tue Apr 18, 2017

Bifurcations of Coupled Electron-Phonon Modes in an Antiferromagnet Subjected to a Magnetic Field

2017-04-18T10:00:00-04:00

Author(s): K. N. Boldyrev, T. N. Stanislavchuk, A. A. Sirenko, D. Kamenskyi, L. N. Bezmaternykh, and M. N. Popova
We report on a new effect caused by the electron-phonon coupling in a stoichiometric rare-earth antiferromagnetic crystal subjected to an external magnetic field, namely, the appearance of a nonzero gap in the spectrum of electronic excitations in an arbitrarily small field. The effect was registere…
[Phys. Rev. Lett. 118, 167203] Published Tue Apr 18, 2017

Erratum: Refractive Index of Silicon at γ Ray Energies [Phys. Rev. Lett. 108, 184802 (2012)]

2017-04-18T10:00:00-04:00

Author(s): D. Habs, M. M. Günther, M. Jentschel, and W. Urban
[Phys. Rev. Lett. 118, 169904] Published Tue Apr 18, 2017

Circumventing Heisenberg’s Uncertainty Principle in Atom Interferometry Tests of the Equivalence Principle

2017-04-17T10:00:00-04:00

Author(s): Albert Roura
Atom interferometry tests of universality of free fall based on the differential measurement of two different atomic species provide a useful complement to those based on macroscopic masses. However, when striving for the highest possible sensitivities, gravity gradients pose a serious challenge. In…
[Phys. Rev. Lett. 118, 160401] Published Mon Apr 17, 2017

Quantum Teleportation Between Discrete and Continuous Encodings of an Optical Qubit

2017-04-17T10:00:00-04:00

Author(s): Alexander E. Ulanov, Demid Sychev, Anastasia A. Pushkina, Ilya A. Fedorov, and A. I. Lvovsky
The transfer of quantum information between physical systems of a different nature is a central matter in quantum technologies. Particularly challenging is the transfer between discrete and continuous degrees of freedom of various harmonic oscillator systems. Here we implement a protocol for telepor…
[Phys. Rev. Lett. 118, 160501] Published Mon Apr 17, 2017

Discrimination Power of a Quantum Detector

2017-04-17T10:00:00-04:00

Author(s): Christoph Hirche, Masahito Hayashi, Emilio Bagan, and John Calsamiglia
We investigate the ability of a quantum measurement device to discriminate two states or, generically, two hypotheses. In full generality, the measurement can be performed a number n of times, and arbitrary preprocessing of the states and postprocessing of the obtained data are allowed. There is an …
[Phys. Rev. Lett. 118, 160502] Published Mon Apr 17, 2017

Large Deviations of a Tracer in the Symmetric Exclusion Process

2017-04-17T10:00:00-04:00

Author(s): Takashi Imamura, Kirone Mallick, and Tomohiro Sasamoto

Anomalous diffusion of gas particles in a single-file channel is modeled using the one-dimensional symmetric exclusion process by tracking a tagged particle. An exact formula is derived for the large fluctuations of this tracer.

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[Phys. Rev. Lett. 118, 160601] Published Mon Apr 17, 2017

Measurement of a Cosmographic Distance Ratio with Galaxy and Cosmic Microwave Background Lensing

2017-04-17T10:00:00-04:00

Author(s): Hironao Miyatake, Mathew S. Madhavacheril, Neelima Sehgal, Anže Slosar, David N. Spergel, Blake Sherwin, and Alexander van Engelen
We measure the gravitational lensing shear signal around dark matter halos hosting constant mass galaxies using light sources at z∼1 (background galaxies) and at the surface of last scattering at z∼1100 (the cosmic microwave background). The galaxy shear measurement uses data from the CFHTLenS surve…
[Phys. Rev. Lett. 118, 161301] Published Mon Apr 17, 2017

_{36} ^{96} Kr_{60} –Low-Z Boundary of the Island of Deformation at N=60

2017-04-17T10:00:00-04:00

Author(s): J. Dudouet et al.
Prompt γ-ray spectroscopy of the neutron-rich ^{96}Kr, produced in transfer- and fusion-induced fission reactions, has been performed using the combination of the Advanced Gamma Tracking Array and the VAMOS++ spectrometer. A second excited state, assigned to J^{π}=4^{+}, is observed for the first ti…
[Phys. Rev. Lett. 118, 162501] Published Mon Apr 17, 2017

Helium Atom Excitations by the GW and Bethe-Salpeter Many-Body Formalism

2017-04-17T10:00:00-04:00

Author(s): Jing Li, Markus Holzmann, Ivan Duchemin, Xavier Blase, and Valerio Olevano
The helium atom is the simplest many-body electronic system provided by nature. The exact solution to the Schrödinger equation is known for helium ground and excited states, and it represents a benchmark for any many-body methodology. Here, we check the ab initio many-body GW approximation and the B…
[Phys. Rev. Lett. 118, 163001] Published Mon Apr 17, 2017

Perfect Transmission through Disordered Media

2017-04-17T10:00:00-04:00

Author(s): C. G. King, S. A. R. Horsley, and T. G. Philbin
The transmission of a wave through a randomly chosen “pile of plates” typically decreases exponentially with the number of plates, a phenomenon closely related to Anderson localization. In apparent contradiction, we construct disordered planar permittivity profiles which are complex valued (i.e., ha…
[Phys. Rev. Lett. 118, 163201] Published Mon Apr 17, 2017

Exact Single-Electron Approach to the Dynamics of Molecules in Strong Laser Fields

2017-04-17T10:00:00-04:00

Author(s): Axel Schild and E. K. U. Gross

An exact single-electron theory is derived for many-electron processes in strong-fields. As a first illustration of its potential, the theory is used to derive the single-active electron approximation, which had hitherto been an assumption.

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[Phys. Rev. Lett. 118, 163202] Published Mon Apr 17, 2017

Isotopic Shift of Atom-Dimer Efimov Resonances in K-Rb Mixtures: Critical Effect of Multichannel Feshbach Physics

2017-04-17T10:00:00-04:00

Author(s): K. Kato, Yujun Wang, J. Kobayashi, P. S. Julienne, and S. Inouye
Multichannel Efimov physics is investigated in ultracold heteronuclear admixtures of K and Rb atoms. We observe a shift in the scattering length where the first atom-dimer resonance appears in the ^{41}K−^{87}Rb system relative to the position of the previously observed atom-dimer resonance in the ^…
[Phys. Rev. Lett. 118, 163401] Published Mon Apr 17, 2017

Atom Interferometry in a Warm Vapor

2017-04-17T10:00:00-04:00

Author(s): G. W. Biedermann, H. J. McGuinness, A. V. Rakholia, Y.-Y. Jau, D. R. Wheeler, J. D. Sterk, and G. R. Burns

Researchers have demonstrated an atom interferometer based on a warm vapor, rather than on a cold atomic gas.

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[Phys. Rev. Lett. 118, 163601] Published Mon Apr 17, 2017

Regularizing Aperiodic Cycles of Resonant Radiation in Filament Light Bullets

2017-04-17T10:00:00-04:00

Author(s): Carsten Brée, Ihar Babushkin, Uwe Morgner, and Ayhan Demircan
We demonstrate an up to now unrecognized and very effective mechanism which prevents filament collapse and allows persistent self-guiding propagation retaining a large portion of the optical energy on axis over unexpected long distances. The key ingredient is the possibility of continuously leaking …
[Phys. Rev. Lett. 118, 163901] Published Mon Apr 17, 2017

Semiclassical Identification of Periodic Orbits in a Quantum Many-Body System

2017-04-17T10:00:00-04:00

Author(s): Maram Akila, Daniel Waltner, Boris Gutkin, Petr Braun, and Thomas Guhr
While a wealth of results has been obtained for chaos in single-particle quantum systems, much less is known about chaos in quantum many-body systems. We contribute to recent efforts to make a semiclassical analysis of such systems feasible, which is nontrivial due to the exponential proliferation o…
[Phys. Rev. Lett. 118, 164101] Published Mon Apr 17, 2017

Discontinuous Transition from Direct to Inverse Cascade in Three-Dimensional Turbulence

2017-04-17T10:00:00-04:00

Author(s): Ganapati Sahoo, Alexandros Alexakis, and Luca Biferale
Inviscid invariants of flow equations are crucial in determining the direction of the turbulent energy cascade. In this work we investigate a variant of the three-dimensional Navier-Stokes equations that shares exactly the same ideal invariants (energy and helicity) and the same symmetries (under ro…
[Phys. Rev. Lett. 118, 164501] Published Mon Apr 17, 2017

Plasma Wave Seed for Raman Amplifiers

2017-04-17T10:00:00-04:00

Author(s): Kenan Qu, Ido Barth, and Nathaniel J. Fisch
It is proposed to replace the traditional counterpropagating laser seed in backward Raman amplifiers with a plasma wave seed. In the linear regime, namely, for a constant pump amplitude, a plasma wave seed may be found by construction that strictly produces the same output pulse as does a counterpro…
[Phys. Rev. Lett. 118, 164801] Published Mon Apr 17, 2017

Reduction of Intrinsic Electron Emittance from Photocathodes Using Ordered Crystalline Surfaces

2017-04-17T10:00:00-04:00

Author(s): Siddharth Karkare, Jun Feng, Xumin Chen, Weishi Wan, F. Javier Palomares, T.-C. Chiang, and Howard A. Padmore
The generation of intense electron beams with low emittance is key to both the production of coherent x rays from free electron lasers, and electron pulses with large transverse coherence length used in ultrafast electron diffraction. These beams are generated today by photoemission from disordered …
[Phys. Rev. Lett. 118, 164802] Published Mon Apr 17, 2017

Kinetics of Vapor-Solid Phase Transitions: Structure, Growth, and Mechanism

2017-04-17T10:00:00-04:00

Author(s): Jiarul Midya and Subir K. Das
The kinetics of the separation between low and high density phases in a single component Lennard-Jones model is studied via molecular dynamics simulations, at very low temperatures, in the space dimension d=2. For densities close to the vapor branch of the coexistence curve, disconnected nanoscale c…
[Phys. Rev. Lett. 118, 165701] Published Mon Apr 17, 2017

Interlayer Pairing Symmetry of Composite Fermions in Quantum Hall Bilayers

2017-04-17T10:00:00-04:00

Author(s): Hiroki Isobe and Liang Fu
We study the pairing symmetry of the interlayer paired state of composite fermions in quantum Hall bilayers. Based on the Halperin-Lee-Read (HLR) theory, the effect of the long-range Coulomb interaction and the internal Chern-Simons gauge fluctuation is analyzed with the random-phase approximation b…
[Phys. Rev. Lett. 118, 166401] Published Mon Apr 17, 2017

Scaling Theory of the Anderson Transition in Random Graphs: Ergodicity and Universality

2017-04-17T10:00:00-04:00

Author(s): I. García-Mata, O. Giraud, B. Georgeot, J. Martin, R. Dubertrand, and G. Lemarié
We study the Anderson transition on a generic model of random graphs with a tunable branching parameter 1
[Phys. Rev. Lett. 118, 166801] Published Mon Apr 17, 2017

Emergence of Supersymmetric Quantum Electrodynamics

2017-04-17T10:00:00-04:00

Author(s): Shao-Kai Jian, Chien-Hung Lin, Joseph Maciejko, and Hong Yao
Supersymmetric (SUSY) gauge theories such as the minimal supersymmetric standard model play a fundamental role in modern particle physics, but have not been verified so far in nature. Here, we show that a SUSY gauge theory with dynamical gauge bosons and fermionic gauginos emerges naturally at the p…
[Phys. Rev. Lett. 118, 166802] Published Mon Apr 17, 2017

Topological Subspace-Induced Bound State in the Continuum

2017-04-17T10:00:00-04:00

Author(s): Yi-Xin Xiao, Guancong Ma, Zhao-Qing Zhang, and C. T. Chan

A new theory shows that symmetry-protected topological properties can survive in a system when the symmetry is broken, something that was previously thought to be impossible.

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[Phys. Rev. Lett. 118, 166803] Published Mon Apr 17, 2017

Tracing the Electronic Pairing Glue in Unconventional Superconductors via Inelastic Scanning Tunneling Spectroscopy

2017-04-17T10:00:00-04:00

Author(s): Patrik Hlobil, Jasmin Jandke, Wulf Wulfhekel, and Jörg Schmalian
Scanning tunneling microscopy has been shown to be a powerful experimental probe to detect electronic excitations and further allows us to deduce fingerprints of bosonic collective modes in superconductors. Here, we demonstrate that the inclusion of inelastic tunnel events is crucial for the interpr…
[Phys. Rev. Lett. 118, 167001] Published Mon Apr 17, 2017

Unconventional Superconductivity in the BiS_{2} -Based Layered Superconductor NdO_{0.71} F_{0.29} BiS_{2}

2017-04-17T10:00:00-04:00

Author(s): Yuichi Ota, Kozo Okazaki, Haruyoshi Q. Yamamoto, Takashi Yamamoto, Shuntaro Watanabe, Chuangtian Chen, Masanori Nagao, Satoshi Watauchi, Isao Tanaka, Yoshihiko Takano, and Shik Shin
We investigate the superconducting-gap anisotropy in one of the recently discovered BiS_{2}-based superconductors, NdO_{0.71}F_{0.29}BiS_{2} (T_{c}∼5  K), using laser-based angle-resolved photoemission spectroscopy. Whereas the previously discovered high-T_{c} superconductors such as copper oxides a…
[Phys. Rev. Lett. 118, 167002] Published Mon Apr 17, 2017

Hund’s Induced Fermi-Liquid Instabilities and Enhanced Quasiparticle Interactions

2017-04-17T10:00:00-04:00

Author(s): Luca de’ Medici
Hund’s coupling is shown to generally favor, in a doped half-filled Mott insulator, an increase in the compressibility culminating in a Fermi-liquid instability towards phase separation. The largest effect is found near the frontier between an ordinary and an orbitally decoupled (“Hund’s”) metal. Th…
[Phys. Rev. Lett. 118, 167003] Published Mon Apr 17, 2017

Anomalous Current-Induced Spin Torques in Ferrimagnets near Compensation

2017-04-17T10:00:00-04:00

Author(s): Rahul Mishra, Jiawei Yu, Xuepeng Qiu, M. Motapothula, T. Venkatesan, and Hyunsoo Yang
While current-induced spin-orbit torques have been extensively studied in ferromagnets and antiferromagnets, ferrimagnets have been less studied. Here we report the presence of enhanced spin-orbit torques resulting from negative exchange interaction in ferrimagnets. The effective field and switching…
[Phys. Rev. Lett. 118, 167201] Published Mon Apr 17, 2017

Translation-Invariant Parent Hamiltonians of Valence Bond Crystals

2017-04-17T10:00:00-04:00

Author(s): Daniel Huerga, Andrés Greco, Claudio Gazza, and Alejandro Muramatsu
We present a general method to construct translation-invariant and SU(2) symmetric antiferromagnetic parent Hamiltonians of valence bond crystals (VBCs). The method is based on a canonical mapping transforming S=1/2 spin operators into a bilinear form of a new set of dimer fermion operators. We cons…
[Phys. Rev. Lett. 118, 167202] Published Mon Apr 17, 2017

Artificial Nonlinearity Generated from Electromagnetic Coupling Metamolecule

2017-04-17T10:00:00-04:00

Author(s): Yongzheng Wen and Ji Zhou
A purely artificial mechanism for optical nonlinearity is proposed based on a metamaterial route. The mechanism is derived from classical electromagnetic interaction in a metamolecule consisting of a cut-wire meta-atom nested within a split-ring meta-atom. Induced by the localized magnetic field in …
[Phys. Rev. Lett. 118, 167401] Published Mon Apr 17, 2017

Diffusion Geometry Unravels the Emergence of Functional Clusters in Collective Phenomena

2017-04-17T10:00:00-04:00

Author(s): Manlio De Domenico
Collective phenomena emerge from the interaction of natural or artificial units with a complex organization. The interplay between structural patterns and dynamics might induce functional clusters that, in general, are different from topological ones. In biological systems, like the human brain, the…
[Phys. Rev. Lett. 118, 168301] Published Mon Apr 17, 2017

Time-Delay Induced Dimensional Crossover in the Voter Model

2017-04-17T10:00:00-04:00

Author(s): Mina Kim (김민아) and Jae Dong Noh (노재동)
We investigate the ordering dynamics of the voter model with time-delayed interactions. The dynamical process in the d-dimensional lattice is shown to be equivalent to the first passage problem of a random walker in the (d+1)-dimensional strip of a finite width determined by the delay time. The equi…
[Phys. Rev. Lett. 118, 168302] Published Mon Apr 17, 2017

Publisher’s Note: Gating Classical Information Flow via Equilibrium Quantum Phase Transitions [Phys. Rev. Lett. 118, 147203 (2017)]

2017-04-17T10:00:00-04:00

Author(s): Leonardo Banchi, Joaquín Fernández-Rossier, Cyrus F. Hirjibehedin, and Sougato Bose
[Phys. Rev. Lett. 118, 169901] Published Mon Apr 17, 2017

Erratum: Nonlinear Zel’dovich Effect: Parametric Amplification from Medium Rotation [Phys. Rev. Lett. 118, 093901 (2017)]

2017-04-17T10:00:00-04:00

Author(s): Daniele Faccio and Ewan M. Wright
[Phys. Rev. Lett. 118, 169902] Published Mon Apr 17, 2017

Publisher’s Note: Generalized Pseudopotentials for the Anisotropic Fractional Quantum Hall Effect [Phys. Rev. Lett. 118, 146403 (2017)]

2017-04-17T10:00:00-04:00

Author(s): Bo Yang, Zi-Xiang Hu, Ching Hua Lee, and Z. Papić
[Phys. Rev. Lett. 118, 169903] Published Mon Apr 17, 2017

Digging Deeper: Observing Primordial Gravitational Waves below the Binary-Black-Hole-Produced Stochastic Background

2017-04-14T10:00:00-04:00

Author(s): T. Regimbau, M. Evans, N. Christensen, E. Katsavounidis, B. Sathyaprakash, and S. Vitale
The merger rate of black hole binaries inferred from the detections in the first Advanced LIGO science run implies that a stochastic background produced by a cosmological population of mergers will likely mask the primordial gravitational wave background. Here we demonstrate that the next generation…
[Phys. Rev. Lett. 118, 151105] Published Fri Apr 14, 2017

Ultrafast Dissociation of Metastable CO^{2+} in a Dimer

2017-04-14T10:00:00-04:00

Author(s): Xiaoyan Ding, M. Haertelt, S. Schlauderer, M. S. Schuurman, A. Yu. Naumov, D. M. Villeneuve, A. R. W. McKellar, P. B. Corkum, and A. Staudte
We triply ionize the van der Waals bound carbon monoxide dimer with intense ultrashort pulses and study the breakup channel (CO)_{2}^{3+}→C^{+}+O^{+}+CO^{+}. The fragments are recorded in a cold target recoil ion momentum spectrometer. We observe a fast CO^{2+} dissociation channel in the dimer, whi…
[Phys. Rev. Lett. 118, 153001] Published Fri Apr 14, 2017

Time-Reversal Symmetry Bounds on the Electromagnetic Response of Asymmetric Structures

2017-04-14T10:00:00-04:00

Author(s): Dimitrios L. Sounas and Andrea Alù
Asymmetric structures support different field distributions and electromagnetic responses when excited from different directions. Here we show that time-reversal symmetry imposes fundamental constraints on their overall response, beyond those dictated by reciprocity. For two-port devices, the asymme…
[Phys. Rev. Lett. 118, 154302] Published Fri Apr 14, 2017

Depletion of Intense Fields

2017-04-14T10:00:00-04:00

Author(s): D. Seipt, T. Heinzl, M. Marklund, and S. S. Bulanov
The interaction of charged particles and photons with intense electromagnetic fields gives rise to multiphoton Compton and Breit-Wheeler processes. These are usually described in the framework of the external field approximation, where the electromagnetic field is assumed to have infinite energy. Ho…
[Phys. Rev. Lett. 118, 154803] Published Fri Apr 14, 2017

Probing Microplasticity in Small-Scale FCC Crystals via Dynamic Mechanical Analysis

2017-04-14T10:00:00-04:00

Author(s): Xiaoyue Ni, Stefanos Papanikolaou, Gabriele Vajente, Rana X Adhikari, and Julia R. Greer
In small-scale metallic systems, collective dislocation activity has been correlated with size effects in strength and with a steplike plastic response under uniaxial compression and tension. Yielding and plastic flow in these samples is often accompanied by the emergence of multiple dislocation ava…
[Phys. Rev. Lett. 118, 155501] Published Fri Apr 14, 2017

Screening, Hyperuniformity, and Instability in the Sedimentation of Irregular Objects

2017-04-14T10:00:00-04:00

Author(s): Tomer Goldfriend, Haim Diamant, and Thomas A. Witten

A new theory suggests that sedimenting particles of irregular shape will drift horizontally as they fall, a result that may resolve a long-standing puzzle.

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[Phys. Rev. Lett. 118, 158005] Published Fri Apr 14, 2017

Nonlinear Rheology in a Model Biological Tissue

2017-04-14T10:00:00-04:00

Author(s): D. A. Matoz-Fernandez, Elisabeth Agoritsas, Jean-Louis Barrat, Eric Bertin, and Kirsten Martens

A new model is developed to describe the crossover from linear to non-linear rheology in flowing active tissues. The model is based on stress fluctuations mediated by long-range elastic interactions.

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[Phys. Rev. Lett. 118, 158105] Published Fri Apr 14, 2017

Measurement-Device-Independent Approach to Entanglement Measures

2017-04-13T10:00:00-04:00

Author(s): Farid Shahandeh, Michael J. W. Hall, and Timothy C. Ralph
Within the context of semiquantum nonlocal games, the trust can be removed from the measurement devices in an entanglement-detection procedure. Here, we show that a similar approach can be taken to quantify the amount of entanglement. To be specific, first, we show that in this context, a small subs…
[Phys. Rev. Lett. 118, 150505] Published Thu Apr 13, 2017

Frame-Independent Classification of Single-Field Inflationary Models

2017-04-13T10:00:00-04:00

Author(s): Laur Järv, Kristjan Kannike, Luca Marzola, Antonio Racioppi, Martti Raidal, Mihkel Rünkla, Margus Saal, and Hardi Veermäe
Seemingly unrelated models of inflation that originate from different physical setups yield, in some cases, identical predictions for the currently constrained inflationary observables. In order to classify the available models, we propose to express the slow-roll parameters and the relevant observa…
[Phys. Rev. Lett. 118, 151302] Published Thu Apr 13, 2017

Phonoritonic Crystals with a Synthetic Magnetic Field for an Acoustic Diode

2017-04-13T10:00:00-04:00

Author(s): A. V. Poshakinskiy and A. N. Poddubny
We develop a rigorous theoretical framework to describe light-sound interaction in the laser-pumped periodic multiple-quantum-well structure accounting for hybrid phonon-polariton excitations, termed phonoritons. We show that phonoritons exhibit the pumping-induced synthetic magnetic field in the ar…
[Phys. Rev. Lett. 118, 156801] Published Thu Apr 13, 2017

Matching Microscopic and Macroscopic Responses in Glasses

2017-04-13T10:00:00-04:00

Author(s): M. Baity-Jesi, E. Calore, A. Cruz, L. A. Fernandez, J. M. Gil-Narvion, A. Gordillo-Guerrero, D. Iñiguez, A. Maiorano, E. Marinari, V. Martin-Mayor, J. Monforte-Garcia, A. Muñoz-Sudupe, D. Navarro, G. Parisi, S. Perez-Gaviro, F. Ricci-Tersenghi, J. J. Ruiz-Lorenzo, S. F. Schifano, B. Seoane, A. Tarancon, R. Tripiccione, and D. Yllanes (Janus Collaboration)
We first reproduce on the Janus and Janus II computers a milestone experiment that measures the spin-glass coherence length through the lowering of free-energy barriers induced by the Zeeman effect. Secondly, we determine the scaling behavior that allows a quantitative analysis of a new experiment r…
[Phys. Rev. Lett. 118, 157202] Published Thu Apr 13, 2017

Magnetic Field Dependence of Spin Glass Free Energy Barriers

2017-04-13T10:00:00-04:00

Author(s): Samaresh Guchhait and Raymond L. Orbach
We measure the field dependence of spin glass free energy barriers in a thin amorphous Ge:Mn film through the time dependence of the magnetization. After the correlation length ξ(t,T) has reached the film thickness L=155  Å so that the dynamics are activated, we change the initial magnetic field by …
[Phys. Rev. Lett. 118, 157203] Published Thu Apr 13, 2017

Scale Invariance in Lateral Head Scans During Spatial Exploration

2017-04-13T10:00:00-04:00

Author(s): Chetan K. Yadav and Yoganarasimha Doreswamy
Universality connects various natural phenomena through physical principles governing their dynamics, and has provided broadly accepted answers to many complex questions, including information processing in neuronal systems. However, its significance in behavioral systems is still elusive. Lateral h…
[Phys. Rev. Lett. 118, 158104] Published Thu Apr 13, 2017

Single-Shot Readout of a Nuclear Spin Weakly Coupled to a Nitrogen-Vacancy Center at Room Temperature

2017-04-12T10:00:00-04:00

Author(s): Gang-Qin Liu, Jian Xing, Wen-Long Ma, Ping Wang, Chang-Hao Li, Hoi Chun Po, Yu-Ran Zhang, Heng Fan, Ren-Bao Liu, and Xin-Yu Pan
Single-shot readout of qubits is required for scalable quantum computing. Nuclear spins are superb quantum memories due to their long coherence time, but are difficult to be read out in a single shot due to their weak interaction with probes. Here we demonstrate single-shot readout of a weakly coupl…
[Phys. Rev. Lett. 118, 150504] Published Wed Apr 12, 2017

Enhancing the Charging Power of Quantum Batteries

2017-04-12T10:00:00-04:00

Author(s): Francesco Campaioli, Felix A. Pollock, Felix C. Binder, Lucas Céleri, John Goold, Sai Vinjanampathy, and Kavan Modi

Calculations show that charging a set of batteries can go faster if the batteries are coupled together quantum mechanically.

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[Phys. Rev. Lett. 118, 150601] Published Wed Apr 12, 2017

Pulsar Timing Array Based Search for Supermassive Black Hole Binaries in the Square Kilometer Array Era

2017-04-12T10:00:00-04:00

Author(s): Yan Wang and Soumya D. Mohanty
The advent of next generation radio telescope facilities, such as the Square Kilometer Array (SKA), will usher in an era where a pulsar timing array (PTA) based search for gravitational waves (GWs) will be able to use hundreds of well timed millisecond pulsars rather than the few dozens in existing …
[Phys. Rev. Lett. 118, 151104] Published Wed Apr 12, 2017

Enhancement of Supersymmetry via Renormalization Group Flow and the Superconformal Index

2017-04-12T10:00:00-04:00

Author(s): Kazunobu Maruyoshi and Jaewon Song
We find a four-dimensional N=1 gauge theory which flows to the minimal interacting N=2 superconformal field theory, the Argyres-Douglas theory, in the infrared up to the extra free chiral multiplets. The gauge theory is obtained from a certain N=1 preserving deformation of the N=2 SU(2) gauge theory…
[Phys. Rev. Lett. 118, 151602] Published Wed Apr 12, 2017

Microscopic Phase-Space Exploration Modeling of ^{258} Fm Spontaneous Fission

2017-04-12T10:00:00-04:00

Author(s): Yusuke Tanimura, Denis Lacroix, and Sakir Ayik
We show that the total kinetic energy (TKE) of nuclei after the spontaneous fission of ^{258}Fm can be well reproduced using simple assumptions on the quantum collective phase space explored by the nucleus after passing the fission barrier. Assuming energy conservation and phase-space exploration ac…
[Phys. Rev. Lett. 118, 152501] Published Wed Apr 12, 2017

Scattering of the Halo Nucleus ^{11} Be on ^{197} Au at Energies around the Coulomb Barrier

2017-04-12T10:00:00-04:00

Author(s): V. Pesudo et al.
Angular distributions of the elastic, inelastic, and breakup cross sections of the halo nucleus ^{11}Be on ^{197}Au were measured at energies below (E_{lab}=31.9  MeV) and around (39.6 MeV) the Coulomb barrier. These three channels were unambiguously separated for the first time for reactions of ^{1…
[Phys. Rev. Lett. 118, 152502] Published Wed Apr 12, 2017

Ab Initio Description of Open-Shell Nuclei: Merging No-Core Shell Model and In-Medium Similarity Renormalization Group

2017-04-12T10:00:00-04:00

Author(s): Eskendr Gebrerufael, Klaus Vobig, Heiko Hergert, and Robert Roth
We merge two successful ab initio nuclear-structure methods, the no-core shell model (NCSM) and the multireference in-medium similarity renormalization group (IM-SRG) to define a new many-body approach for the comprehensive description of ground and excited states of closed and open-shell nuclei. Bu…
[Phys. Rev. Lett. 118, 152503] Published Wed Apr 12, 2017

Direct Evidence for Octupole Deformation in ^{146} Ba and the Origin of Large E1 Moment Variations in Reflection-Asymmetric Nuclei

2017-04-12T10:00:00-04:00

Author(s): B. Bucher et al.
Despite the more than 1 order of magnitude difference between the measured dipole moments in ^{144}Ba and ^{146}Ba, the octupole correlations in ^{146}Ba are found to be as strong as those in ^{144}Ba with a similarly large value of B(E3;3^{−}→0^{+}) determined as 48(+21−29)  W.u. The new results no…
[Phys. Rev. Lett. 118, 152504] Published Wed Apr 12, 2017

Diffractive Focusing of Waves in Time and in Space

2017-04-12T10:00:00-04:00

Author(s): Dror Weisman, Shenhe Fu, Manuel Gonçalves, Lev Shemer, Jianying Zhou, Wolfgang P. Schleich, and Ady Arie
We study the general wave phenomenon of diffractive focusing from a single slit for two types of waves and demonstrate several properties of this effect. Whereas in the first situation, the envelope of a surface gravity water wave is modulated in time by a rectangular function, leading to temporal f…
[Phys. Rev. Lett. 118, 154301] Published Wed Apr 12, 2017

Huygens-Fresnel Acoustic Interference and the Development of Robust Time-Averaged Patterns from Traveling Surface Acoustic Waves

2017-04-12T10:00:00-04:00

Author(s): Citsabehsan Devendran, David J. Collins, Ye Ai, and Adrian Neild
Periodic pattern generation using time-averaged acoustic forces conventionally requires the intersection of counterpropagating wave fields, where suspended micro-objects in a microfluidic system collect along force potential minimizing nodal or antinodal lines. Whereas this effect typically requires…
[Phys. Rev. Lett. 118, 154501] Published Wed Apr 12, 2017

Direct Measurement of Sub-10 fs Relativistic Electron Beams with Ultralow Emittance

2017-04-12T10:00:00-04:00

Author(s): Jared Maxson, David Cesar, Giacomo Calmasini, Alexander Ody, Pietro Musumeci, and David Alesini

Electron pulses have shattered the 10-femtosecond barrier at which essentially all atomic motion is frozen in materials.

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[Phys. Rev. Lett. 118, 154802] Published Wed Apr 12, 2017

Impurity Transport in a Mixed-Collisionality Stellarator Plasma

2017-04-12T10:00:00-04:00

Author(s): P. Helander, S. L. Newton, A. Mollén, and H. M. Smith
A potential threat to the performance of magnetically confined fusion plasmas is the problem of impurity accumulation, which causes the concentration of highly charged impurity ions to rise uncontrollably in the center of the plasma and spoil the energy confinement by excessive radiation. It has lon…
[Phys. Rev. Lett. 118, 155002] Published Wed Apr 12, 2017

Doping Dependence of Collective Spin and Orbital Excitations in the Spin-1 Quantum Antiferromagnet La_{2−x} Sr_{x} NiO_{4} Observed by X Rays

2017-04-12T10:00:00-04:00

Author(s): G. Fabbris, D. Meyers, L. Xu, V. M. Katukuri, L. Hozoi, X. Liu, Z.-Y. Chen, J. Okamoto, T. Schmitt, A. Uldry, B. Delley, G. D. Gu, D. Prabhakaran, A. T. Boothroyd, J. van den Brink, D. J. Huang, and M. P. M. Dean
We report the first empirical demonstration that resonant inelastic x-ray scattering (RIXS) is sensitive to collective magnetic excitations in S=1 systems by probing the Ni L_{3} edge of La_{2−x}Sr_{x}NiO_{4} (x=0, 0.33, 0.45). The magnetic excitation peak is asymmetric, indicating the presence of s…
[Phys. Rev. Lett. 118, 156402] Published Wed Apr 12, 2017

Lattice-Rotation Vortex at the Charged Monoclinic Domain Boundary in a Relaxor Ferroelectric Crystal

2017-04-12T10:00:00-04:00

Author(s): Yu-Tsun Shao and Jian-Min Zuo
We present evidence of lattice-rotation vortices having an average radius of ∼7  nm at the ferroelectric domain boundary of (1−x)Pb(Zn_{1/3}Nb_{2/3})O_{3}−xPbTiO_{3} (x=0.08). Maps of crystal orientations and domain symmetry breaking are obtained using scanning convergent beam electron diffraction, …
[Phys. Rev. Lett. 118, 157601] Published Wed Apr 12, 2017

Nonlocal Parity Order in the Two-Dimensional Mott Insulator

2017-04-12T10:00:00-04:00

Author(s): Serena Fazzini, Federico Becca, and Arianna Montorsi
The Mott insulator is characterized by having small deviations around the (integer) average particle density n, with pairs with n−1 and n+1 particles forming bound states. In one dimension, the effect is captured by a nonzero value of a nonlocal “string” of parities, which instead vanishes in the su…
[Phys. Rev. Lett. 118, 157602] Published Wed Apr 12, 2017

Effect of Cell Aspect Ratio on Swarming Bacteria

2017-04-12T10:00:00-04:00

Author(s): Bella Ilkanaiv, Daniel B. Kearns, Gil Ariel, and Avraham Be’er
Swarming bacteria collectively migrate on surfaces using flagella, forming dynamic whirls and jets that consist of millions of individuals. Because some swarming bacteria elongate prior to actual motion, cell aspect ratio may play a significant role in the collective dynamics. Extensive research on …
[Phys. Rev. Lett. 118, 158002] Published Wed Apr 12, 2017

Imaging Local Diffusive Dynamics Using Diffusion Exchange Spectroscopy MRI

2017-04-12T10:00:00-04:00

Author(s): Dan Benjamini, Michal E. Komlosh, and Peter J. Basser
The movement of water between microenvironments presents a central challenge in the physics of soft matter and porous media. Diffusion exchange spectroscopy (DEXSY) is a powerful 2D nuclear magnetic resonance method for measuring such exchange, yet it is rarely used because of its long scan time req…
[Phys. Rev. Lett. 118, 158003] Published Wed Apr 12, 2017

Flow Navigation by Smart Microswimmers via Reinforcement Learning

2017-04-12T10:00:00-04:00

Author(s): Simona Colabrese, Kristian Gustavsson, Antonio Celani, and Luca Biferale

“Smart” microswimmers—those that can sense mechanical cues from their surroundings and respond to them—can learn to take advantage of their environment, escaping bad situations and actively seeking more favorable ones.

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[Phys. Rev. Lett. 118, 158004] Published Wed Apr 12, 2017

Comment on “New Ground-State Crystal Structure of Elemental Boron”

2017-04-12T10:00:00-04:00

Author(s): Tadashi Ogitsu, Vincenzo Lordi, Eric Schwegler, and Michael Widom
[Phys. Rev. Lett. 118, 159601] Published Wed Apr 12, 2017

Erratum: New Ground-State Crystal Structure of Elemental Boron [Phys. Rev. Lett. 117, 085501 (2016)]

2017-04-12T10:00:00-04:00

Author(s): Qi An, K. Madhav Reddy, Kelvin Y. Xie, Kevin J. Hemker, and William A. Goddard, III
[Phys. Rev. Lett. 118, 159902] Published Wed Apr 12, 2017

Pumped-Up SU(1,1) Interferometry

2017-04-11T10:00:00-04:00

Author(s): Stuart S. Szigeti, Robert J. Lewis-Swan, and Simon A. Haine
Although SU(1,1) interferometry achieves Heisenberg-limited sensitivities, it suffers from one major drawback: Only those particles outcoupled from the pump mode contribute to the phase measurement. Since the number of particles outcoupled to these “side modes” is typically small, this limits the in…
[Phys. Rev. Lett. 118, 150401] Published Tue Apr 11, 2017

Hybrid Quantum-Classical Approach to Quantum Optimal Control

2017-04-11T10:00:00-04:00

Author(s): Jun Li, Xiaodong Yang, Xinhua Peng, and Chang-Pu Sun
A central challenge in quantum computing is to identify more computational problems for which utilization of quantum resources can offer significant speedup. Here, we propose a hybrid quantum-classical scheme to tackle the quantum optimal control problem. We show that the most computationally demand…
[Phys. Rev. Lett. 118, 150503] Published Tue Apr 11, 2017

First Demonstration of Electrostatic Damping of Parametric Instability at Advanced LIGO

2017-04-11T10:00:00-04:00

Author(s): Carl Blair et al. (LSC Instrument Authors)
Interferometric gravitational wave detectors operate with high optical power in their arms in order to achieve high shot-noise limited strain sensitivity. A significant limitation to increasing the optical power is the phenomenon of three-mode parametric instabilities, in which the laser field in th…
[Phys. Rev. Lett. 118, 151102] Published Tue Apr 11, 2017

End Point of the Ultraspinning Instability and Violation of Cosmic Censorship

2017-04-11T10:00:00-04:00

Author(s): Pau Figueras, Markus Kunesch, Luis Lehner, and Saran Tunyasuvunakool
We determine the end point of the axisymmetric ultraspinning instability of asymptotically flat Myers-Perry black holes in D=6 spacetime dimensions. In the nonlinear regime, this instability gives rise to a sequence of concentric rings connected by segments of black membrane on the rotation plane. T…
[Phys. Rev. Lett. 118, 151103] Published Tue Apr 11, 2017

Turbulent Kinetic Energy in the Energy Balance of a Solar Flare

2017-04-11T10:00:00-04:00

Author(s): E. P. Kontar, J. E. Perez, L. K. Harra, A. A. Kuznetsov, A. G. Emslie, N. L. S. Jeffrey, N. H. Bian, and B. R. Dennis
The energy released in solar flares derives from a reconfiguration of magnetic fields to a lower energy state, and is manifested in several forms, including bulk kinetic energy of the coronal mass ejection, acceleration of electrons and ions, and enhanced thermal energy that is ultimately radiated a…
[Phys. Rev. Lett. 118, 155101] Published Tue Apr 11, 2017

Quantum Corrections in Nanoplasmonics: Shape, Scale, and Material

2017-04-11T10:00:00-04:00

Author(s): Thomas Christensen, Wei Yan, Antti-Pekka Jauho, Marin Soljačić, and N. Asger Mortensen
The classical treatment of plasmonics is insufficient at the nanometer-scale due to quantum mechanical surface phenomena. Here, an extension of the classical paradigm is reported which rigorously remedies this deficiency through the incorporation of first-principles surface response functions—the Fe…
[Phys. Rev. Lett. 118, 157402] Published Tue Apr 11, 2017

Dynamic Substrate for the Physical Encoding of Sensory Information in Bat Biosonar

2017-04-11T10:00:00-04:00

Author(s): Rolf Müller, Anupam K. Gupta, Hongxiao Zhu, Mittu Pannala, Uzair S. Gillani, Yanqing Fu, Philip Caspers, and John R. Buck

The directional sensitivity of bat biosonar is improved by the wiggling of structures on the bat’s nose and ears.

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[Phys. Rev. Lett. 118, 158102] Published Tue Apr 11, 2017

Fundamental Costs in the Production and Destruction of Persistent Polymer Copies

2017-04-11T10:00:00-04:00

Author(s): Thomas E. Ouldridge and Pieter Rein ten Wolde

A lower bound is derived for the energetic cost of making polymer copies, a process that occurs during DNA replication and gene expression.

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[Phys. Rev. Lett. 118, 158103] Published Tue Apr 11, 2017

Publisher’s Note: Quantized Vortices and Four-Component Superfluidity of Semiconductor Excitons [Phys. Rev. Lett. 118, 127402 (2017)]

2017-04-11T10:00:00-04:00

Author(s): Romain Anankine, Mussie Beian, Suzanne Dang, Mathieu Alloing, Edmond Cambril, Kamel Merghem, Carmen Gomez Carbonell, Aristide Lemaître, and François Dubin
[Phys. Rev. Lett. 118, 159901] Published Tue Apr 11, 2017

Monitoring of the Process of System Information Broadcasting in Time

2017-04-10T10:00:00-04:00

Author(s): P. Mironowicz, J. K. Korbicz, and P. Horodecki
One of the problems of quantum physics is how a measurement turns quantum, noncopyable data, towards copyable classical knowledge. We use the quantum state discrimination in a central system model to show how its evolution leads to the broadcasting of the information, and how orthogonalization and d…
[Phys. Rev. Lett. 118, 150501] Published Mon Apr 10, 2017