[Phys. Rev. Lett. 118, 030001] Published Tue Jan 17, 2017

]]>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

]]>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

]]>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

]]>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

]]>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

]]>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

]]>We present what we believe is the first example of a “$\lambda $-line” phase transition in black hole thermodynamics. This is a line of (continuous) second order phase transitions which in the case of liquid ${}^{4}\mathrm{He}$ marks the onset of superfluidity. The phase transition occurs for a class of asymptotically anti–…

[Phys. Rev. Lett. 118, 021301] Published Thu Jan 12, 2017

]]>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

]]>A first search for pair production of dark matter candidates through vector boson fusion in proton-proton collisions at $\sqrt{s}=8\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{TeV}$ 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 of a co…

[Phys. Rev. Lett. 118, 021802] Published Thu Jan 12, 2017

]]>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

]]>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

]]>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

]]>Combining density functional theory (DFT) and embedded dynamical mean-field theory (DMFT) methods, we study the metal-insulator transition in ${R}_{2}{\mathrm{Ir}}_{2}{\mathrm{O}}_{7}$ ($R=\mathrm{Y}$, Eu, Sm, Nd, Pr, and Bi) and the topological nature of the insulating compounds. Accurate free energies evaluated using the charge self-consisten…

[Phys. Rev. Lett. 118, 026404] Published Thu Jan 12, 2017

]]>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 $({\mathrm{Sr}}_{1-x}{\mathrm{La}}_{x}{)}_{3}{\mathrm{Ir}}_{2}{\mathrm{O}}_{7}$ ($0\le x\le 0.065$). With increasing doping $x$, the three-dimensional long range antiferr…

[Phys. Rev. Lett. 118, 027202] Published Thu Jan 12, 2017

]]>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

]]>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

]]>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

]]>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

]]>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

]]>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

]]>We derive a selection rule among the ($1+1$)-dimensional SU(2) Wess-Zumino-Witten theories, based on the global anomaly of the discrete ${\mathbb{Z}}_{2}$ symmetry found by Gepner and Witten. In the presence of both the SU(2) and ${\mathbb{Z}}_{2}$ symmetries, a renormalization-group flow is possible between level-$k$ and level-${k}^{\prime}$ Wes…

[Phys. Rev. Lett. 118, 021601] Published Wed Jan 11, 2017

]]>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

]]>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

]]>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

]]>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

]]>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

]]>X-ray diffraction was employed to study the evolution of the charge density wave (CDW) in ${\mathrm{Cu}}_{x}{\mathrm{TiSe}}_{2}$ 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 coincident wi…

[Phys. Rev. Lett. 118, 027002] Published Wed Jan 11, 2017

]]>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

]]>Collective pair conversion ${\nu}_{e}{\overline{\nu}}_{e}\leftrightarrow {\nu}_{x}{\overline{\nu}}_{x}$ by forward scattering, where $x=\mu $ or $\tau $, 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 of $\sqrt{2}{G}_{F}({n}_{{\nu}_{e}}-{n}_{{\overline{\nu}}_{e}})\gg \mathrm{\Delta}{m}_{\mathrm{atm}}^{2}/2E$…

[Phys. Rev. Lett. 118, 021101] Published Tue Jan 10, 2017

]]>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

]]>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

]]>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

]]>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 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 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

]]>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

]]>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

]]>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 $3\text{\hspace{0.17em}}\text{\hspace{0.17em}}{\mathrm{fb}}^{-1}$ at center-of-mass energies of 7 and 8 TeV. A time-dependent analysis of the ${B}_{s}^{0}\to \varphi \gamma $ decay rate…

[Phys. Rev. Lett. 118, 021801] Published Mon Jan 09, 2017

]]>The $\eta \to 3\pi $ amplitude is sensitive to the quark mass difference ${m}_{u}-{m}_{d}$ and offers a unique way to determine the quark mass ratio ${Q}^{2}\equiv ({m}_{s}^{2}-{m}_{ud}^{2})/({m}_{d}^{2}-{m}_{u}^{2})$ from experiment. We calculate the amplitude dispersively and fit the KLOE Collaboration data on the charged mode, varying the subtraction constants in …

[Phys. Rev. Lett. 118, 022001] Published Mon Jan 09, 2017

]]>We present for the first time a determination of the energy dependence of the isoscalar $\pi \pi $ 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

]]>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

]]>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

]]>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

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

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

]]>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

]]>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

]]>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

]]>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

]]>We calculate the temperature dependent anomalous ac Hall conductance ${\sigma}_{H}(\mathrm{\Omega},T)$ for a two-dimensional chiral $p$-wave superconductor. This quantity determines the polar Kerr effect, as it was observed in ${\mathrm{Sr}}_{2}{\mathrm{RuO}}_{4}$ [J. Xia *et al.*, Phys. Rev. Lett. **97**, 167002 (2006)]. We concentrate on a single band model wi…

[Phys. Rev. Lett. 118, 027001] Published Mon Jan 09, 2017

]]>$B20$ 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

]]>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

]]>[Phys. Rev. Lett. 118, 029901] Published Mon Jan 09, 2017

]]>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

]]>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

]]>In a Galactic core-collapse supernova (SN), axionlike particles (ALPs) could be emitted via the Primakoff process and eventually convert into $\gamma $ 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

]]>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

]]>We study supersymmetry breaking perturbations of the simplest dual pair of ($2+1$)-dimensional $\mathcal{N}=2$ supersymmetric field theories—the free chiral multiplet and $\mathcal{N}=2$ 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

]]>We study flux compactifications of 10D type II supergravities to 4D Minkowski space-time, supported by parallel orientifold ${O}_{p}$ planes with $3\le p\le 8$. With some geometric restrictions, the 4D Ricci scalar can be written as a negative sum of squares involving Bogomol’nyi-Prasad-Sommerfield-like conditions…

[Phys. Rev. Lett. 118, 011603] Published Fri Jan 06, 2017

]]>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

]]>Calculations show that capillary forces affecting a fluid mixture flowing through a nanochannel could be used to separate the mixture.

[Phys. Rev. Lett. 118, 014502] Published Fri Jan 06, 2017

]]>Intrinsic toroidal rotation of the deuterium main ions in the core of the DIII-D tokamak is observed to transition from flat to hollow, forming an off-axis peak, above a threshold level of direct electron heating. Nonlinear gyrokinetic simulations show that the residual stress associated with electr…

[Phys. Rev. Lett. 118, 015002] Published Fri Jan 06, 2017

]]>We propose an *ab initio* molecular dynamics method, capable of dramatically reducing the autocorrelation time required for the simulation of classical and quantum particles at finite temperatures. The method is based on an efficient implementation of a first order Langevin dynamics modified by means …

[Phys. Rev. Lett. 118, 015703] Published Fri Jan 06, 2017

]]>This Letter addresses the dynamical quantum problem of a driven discrete energy level coupled to a semi-infinite continuum whose density of states has a square-root-type singularity, such as states of a free particle in one dimension or quasiparticle states in a BCS superconductor. The system dynami…

[Phys. Rev. Lett. 118, 016805] Published Fri Jan 06, 2017

]]>We show that femtosecond laser pulse excitation of the orthoferrite ${\mathrm{ErFeO}}_{3}$ triggers pico- and subpicosecond dynamics of magnetic and electric dipoles associated with the *low energy* electronic states of the ${\mathrm{Er}}^{3+}$ ions. These dynamics are readily revealed by using polarization sensitive terahertz emiss…

[Phys. Rev. Lett. 118, 017205] Published Fri Jan 06, 2017

]]>Heterogeneous ferroelastic transition that produces hierarchical 90° tetragonal nanodomains via mechanical loading and its effect on facilitating ferroelectric domain switching in relaxor-based ferroelectrics were explored. Combining *in situ* electron microscopy characterization and phase-field model…

[Phys. Rev. Lett. 118, 017601] Published Fri Jan 06, 2017

]]>Glasses exhibit a liquidlike structure but a solidlike rheological response with plastic deformations only occurring beyond yielding. Thus, predicting the rheological behavior from the microscopic structure is difficult, but important for materials science. Here, we consider colloidal suspensions an…

[Phys. Rev. Lett. 118, 018002] Published Fri Jan 06, 2017

]]>The current understanding is that the non-Newtonian rheology of active matter suspensions is governed by fluid-mediated hydrodynamic interactions associated with active self-propulsion. Here we discover an additional contribution to the suspension shear stress that predicts both thickening and thinn…

[Phys. Rev. Lett. 118, 018003] Published Fri Jan 06, 2017

]]>Randomly connected networks of excitatory and inhibitory spiking neurons provide a parsimonious model of neural variability, but are notoriously unreliable for performing computations. We show that this difficulty is overcome by incorporating the well-documented dependence of connection probability …

[Phys. Rev. Lett. 118, 018103] Published Fri Jan 06, 2017

]]>Two newly-discovered invariant properties of three-qubit states provide a fundamental missing link between two-party and three-party quantum correlations.

[Phys. Rev. Lett. 118, 010401] Published Thu Jan 05, 2017

]]>The physics of quantum mechanics is the inspiration for, and underlies, quantum computation. As such, one expects physical intuition to be highly influential in the understanding and design of many quantum algorithms, particularly simulation of physical systems. Surprisingly, this has been challengi…

[Phys. Rev. Lett. 118, 010501] Published Thu Jan 05, 2017

]]>A theoretical analysis suggests that interacting models of dark energy may be in tension with anthropic explanations of the cosmological constant based on theories with a finite number of vacua.

[Phys. Rev. Lett. 118, 011302] Published Thu Jan 05, 2017

]]>We discuss quantum field theories with global $SU(N)$ and $O(N)$ symmetries for which temporal direction is compactified on a circle of size $L$ with periodicity of fields up to a global symmetry transformation, i.e., twisted boundary conditions. Such boundary conditions correspond to an insertion of the …

[Phys. Rev. Lett. 118, 011601] Published Thu Jan 05, 2017

]]>We report on a direct search for sub-GeV dark photons (${A}^{\prime}$), which might be produced in the reaction ${e}^{-}Z\to {e}^{-}Z{A}^{\prime}$ via kinetic mixing with photons by 100 GeV electrons incident on an active target in the NA64 experiment at the CERN SPS. The dark photons would decay invisibly into dark matter particles re…

[Phys. Rev. Lett. 118, 011802] Published Thu Jan 05, 2017

]]>$W$ boson pair production processes at ${e}^{+}{e}^{-}$ and $pp$ colliders have been conventionally interpreted as measurements of $WWZ$ and $WW\gamma $ triple gauge couplings (TGCs). Such an interpretation is based on the assumption that new physics effects other than anomalous TGCs are negligible. While this “TGC dominance…

[Phys. Rev. Lett. 118, 011803] Published Thu Jan 05, 2017

]]>Based on a sample of $1.31\times 1{0}^{9}\text{\hspace{0.17em}}\text{\hspace{0.17em}}J/\psi $ events collected with the BESIII detector, an amplitude analysis of the isospin-violating decays ${\eta}^{\prime}\to {\pi}^{+}{\pi}^{-}{\pi}^{0}$ and ${\eta}^{\prime}\to {\pi}^{0}{\pi}^{0}{\pi}^{0}$ is performed. A significant $P$-wave contribution from ${\eta}^{\prime}\to {\rho}^{\pm}{\pi}^{\mp}$ is observed for the first time in ${\eta}^{\prime}\to {\pi}^{+}{\pi}^{-}{\pi}^{0}$. The branching fraction is determined t…

[Phys. Rev. Lett. 118, 012001] Published Thu Jan 05, 2017

]]>We present the first measurement of charge-dependent directed flow in $\mathrm{Cu}+\mathrm{Au}$ collisions at $\sqrt{{s}_{NN}}=200\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{GeV}$. The results are presented as a function of the particle transverse momentum and pseudorapidity for different centralities. A finite difference between the directed flow of positive and negative ch…

[Phys. Rev. Lett. 118, 012301] Published Thu Jan 05, 2017

]]>Intense, circularly polarized extreme-ultraviolet and near-infrared (NIR) laser pulses are combined to double ionize atomic helium via the oriented intermediate ${\mathrm{He}}^{+}(3p)$ resonance state. Applying angle-resolved electron spectroscopy, we find a large photon helicity dependence of the spectrum and the …

[Phys. Rev. Lett. 118, 013002] Published Thu Jan 05, 2017

]]>A study describes tunneling and multi-photon regimes as manifestations of the same nonlinear process, viewed in time and frequency domains.

[Phys. Rev. Lett. 118, 013003] Published Thu Jan 05, 2017

]]>Although individual spins in quantum dots have been studied extensively as qubits, their investigation under strong resonant driving in the scope of accessing Mollow physics is still an open question. Here, we have grown high quality positively charged quantum dots embedded in a planar microcavity t…

[Phys. Rev. Lett. 118, 013602] Published Thu Jan 05, 2017

]]>A new induced transparency effect is predicted to occur when a collective mode is excited in a Bose-Einstein condensate via a Raman process.

[Phys. Rev. Lett. 118, 013901] Published Thu Jan 05, 2017

]]>We analyze the transition from convective to absolute dynamical instabilities in a nonlinear optical system forming patterns, i.e., a photorefractive crystal in a single feedback configuration. We demonstrate that the convective regime is directly related to the bistability area in which the homogen…

[Phys. Rev. Lett. 118, 013902] Published Thu Jan 05, 2017

]]>Direct acceleration of electrons in a coherent, intense light field is revealed by a remarkable increase of the electron number in the MeV energy range. Laser irradiation of thin polymer foils with a peak intensity of $\sim 1\times {10}^{20}\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{W}/{\mathrm{cm}}^{2}$ releases electron bunches along the laser propagation direction tha…

[Phys. Rev. Lett. 118, 014801] Published Thu Jan 05, 2017

]]>We report the first complete set of measurements of a laser-plasma optical system’s refractive index, as seen by a second probe laser beam, as a function of the relative wavelength shift between the two laser beams. Both the imaginary and real refractive index components are found to be in good agre…

[Phys. Rev. Lett. 118, 015001] Published Thu Jan 05, 2017

]]>A quantum phase transition is generally thought to imprint distinctive characteristics on the nonequilibrium dynamics of a closed quantum system. Specifically, the Loschmidt echo after a sudden quench to a quantum critical point—measuring the time dependence of the overlap between initial and time-e…

[Phys. Rev. Lett. 118, 015701] Published Thu Jan 05, 2017

]]>We compute fluctuation-induced (Casimir) forces for classical systems after a temperature quench. Using a generic coarse-grained model for fluctuations of a conserved density, we find that transient forces arise even if the initial and final states are force free. In setups reminiscent of Casimir (p…

[Phys. Rev. Lett. 118, 015702] Published Thu Jan 05, 2017

]]>Contrary to the formation of complicated polycrystals induced by general crystallization, a modulated superlatticelike nanostructure, which grows layer by layer from the surface to the interior of a ${\mathrm{Pd}}_{40}{\mathrm{Ni}}_{10}{\mathrm{Cu}}_{30}{\mathrm{P}}_{20}$ metallic glass, is observed via isothermal annealing below the glass transition tempe…

[Phys. Rev. Lett. 118, 016101] Published Thu Jan 05, 2017

]]>Making use of improved microcavities, hybrid condensates of matter and light can be tuned to reach a thermal equilibrium state, despite their finite lifetime.

[Phys. Rev. Lett. 118, 016602] Published Thu Jan 05, 2017

]]>A pair of semiconductor quantum wells with an inverted band structure hosts electrons whose spins are almost all in the same quantum state.

[Phys. Rev. Lett. 118, 016801] Published Thu Jan 05, 2017

]]>Noncentrosymmetric superconductors exhibit the magnetoelectric effect, which manifests itself in the appearance of the magnetic spin polarization in response to a dissipationless electric current (supercurrent). While much attention has been dedicated to the thermodynamic version of this phenomenon …

[Phys. Rev. Lett. 118, 016802] Published Thu Jan 05, 2017

]]>The inversion layer of $p\text{\u2212}\mathrm{InSb}(110)$ obtained by Cs adsorption of 1.8% of a monolayer is used to probe the Landau level wave functions within smooth potential valleys by scanning tunneling spectroscopy at 14 T. The nodal structure becomes apparent as a double peak structure of each spin polarized firs…

[Phys. Rev. Lett. 118, 016803] Published Thu Jan 05, 2017

]]>We demonstrate that the quantum mutual information (QMI) is a useful probe to study many-body localization (MBL). First, we focus on the detection of a metal-insulator transition for two different models, the noninteracting Aubry-André-Harper model and the spinless fermionic disordered Hubbard chain…

[Phys. Rev. Lett. 118, 016804] Published Thu Jan 05, 2017

]]>Employing complementary torque magnetometry and electron spin resonance on single crystals of herbertsmithite, the closest realization to date of a quantum kagome antiferromagnet featuring a spin-liquid ground state, we provide novel insight into different contributions to its magnetism. At low temp…

[Phys. Rev. Lett. 118, 017202] Published Thu Jan 05, 2017

]]>Microwave magnetodynamics in ferromagnets are often studied in the small-amplitude or weakly nonlinear regime corresponding to modulations of a well-defined magnetic state. However, strongly nonlinear regimes, where the aforementioned approximations are not applicable, have become experimentally acc…

[Phys. Rev. Lett. 118, 017203] Published Thu Jan 05, 2017

]]>Unconventional superconductivity in iron pnictides and chalcogenides has been suggested to be controlled by the interplay of low-energy antiferromagnetic spin fluctuations and the particular topology of the Fermi surface in these materials. Based on this premise, one would also expect the large clas…

[Phys. Rev. Lett. 118, 017204] Published Thu Jan 05, 2017

]]>Molecular motors that carry cargo along biopolymer filaments within cells play a crucial role in the functioning of the cell. In particular, these motors are essential for the formation and maintenance of the cellular protrusions that play key roles in motility and specific functionalities, such as …

[Phys. Rev. Lett. 118, 018102] Published Thu Jan 05, 2017

]]>[Phys. Rev. Lett. 118, 019901] Published Thu Jan 05, 2017

]]>A metamaterial that looks like chainmail has a Hall coefficient whose sign is flipped compared to the material it’s made from.

[Phys. Rev. Lett. 118, 016601] Published Wed Jan 04, 2017

]]>The linear in mass ratio correction to the periapsis advance of equatorial nearly circular orbits around a spinning black hole is calculated for the first time and to a very high precision, providing a key benchmark for different approaches modeling spinning binaries. The high precision of the calcu…

[Phys. Rev. Lett. 118, 011101] Published Tue Jan 03, 2017

]]>The substructures of light bosonic (axionlike) dark matter may condense into compact Bose stars. We study the collapse of critical-mass stars caused by attractive self-interaction of the axionlike particles and find that these processes proceed in an unexpected universal way. First, nonlinear self-s…

[Phys. Rev. Lett. 118, 011301] Published Tue Jan 03, 2017

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