The notion of nonclassical correlations is a powerful contrivance for explaining phenomena exhibited in quantum systems. It is well known, however, that quantum systems are not free to explore arbitrary correlations—the church of the smaller Hilbert space only accepts monogamous congregants. We demo…

[Phys. Rev. Lett. 118, 080402] Published Fri Feb 24, 2017

]]>In this Letter we show that the vortex lattice structure in the Bose-Fermi superfluid mixture can undergo a sequence of structure transitions when the Fermi superfluid is tuned from the BCS regime to the BEC regime. This is due to the difference in the vortex core structure of a Fermi superfluid in …

[Phys. Rev. Lett. 118, 080403] Published Fri Feb 24, 2017

]]>We provide an analysis on non-Markovian quantum evolution based on the spectral properties of dynamical maps. We introduce the dynamical analog of entanglement witness to detect non-Markovianity and we illustrate its behavior with several instructive examples. It is shown that for several important …

[Phys. Rev. Lett. 118, 080404] Published Fri Feb 24, 2017

]]>For the first time, theorists calculate the complete five-loop term in the beta function for quark-gluon coupling in quantum chromodynamics.

[Phys. Rev. Lett. 118, 082002] Published Fri Feb 24, 2017

]]>Calculations show that a carefully engineered laser pulse can induce an atom to emit light as if it were a different atom.

[Phys. Rev. Lett. 118, 083201] Published Fri Feb 24, 2017

]]>We propose a scheme to realize the two-axis countertwisting spin-squeezing Hamiltonian inside an optical cavity with the aid of phase-locked atom-photon coupling. By careful analysis and extensive simulation, we demonstrate that our scheme is robust against dissipation caused by cavity loss and atom…

[Phys. Rev. Lett. 118, 083604] Published Fri Feb 24, 2017

]]>The “free” water surface is generally prone to contamination with surface impurities, be they surfactants, particles, or other surface active agents. The presence of such impurities can modify flow near such interfaces in a drastic manner. Here we show that vibrating a small sphere mounted on an ato…

[Phys. Rev. Lett. 118, 084501] Published Fri Feb 24, 2017

]]>We describe charge transport along a polymer chain with a generic theoretical model depending in principle on tens of parameters, reflecting the chemistry of the material. The charge carrier states are obtained from a model Hamiltonian that incorporates different types of disorder and electronic str…

[Phys. Rev. Lett. 118, 086601] Published Fri Feb 24, 2017

]]>We present a novel mechanism of $s$-wave pairing in Fe-based superconductors. The mechanism involves holes near ${d}_{xz}/{d}_{yz}$ pockets *only* and is applicable primarily to strongly hole doped materials. We argue that as long as the renormalized Hund’s coupling $J$ exceeds the renormalized interorbital Hubbard r…

[Phys. Rev. Lett. 118, 087003] Published Fri Feb 24, 2017

]]>Quasiparticle interference (QPI) imaging of Bogoliubov excitations in quasi-two-dimensional unconventional superconductors has become a powerful technique for measuring the superconducting gap and its symmetry. Here, we present the extension of this method to three-dimensional superconductors and an…

[Phys. Rev. Lett. 118, 087004] Published Fri Feb 24, 2017

]]>The radiationless recombination of electron-hole pairs in semiconductors is detrimental to optoelectronic technologies. A prominent mechanism is Auger recombination, in which nonradiative recombination occurs efficiently by transferring the released energy-momentum to a third charge carrier. Here we…

[Phys. Rev. Lett. 118, 087402] Published Fri Feb 24, 2017

]]>Advanced first-principles calculations reveal that the generation of high harmonic spectra is enhanced by the inhomogeneity of the electron-nuclei potential, which is obtained from the band structure.

[Phys. Rev. Lett. 118, 087403] Published Fri Feb 24, 2017

]]>The structure and properties of the $1:1$ superlattice of ${\mathrm{LaVO}}_{3}$ and ${\mathrm{SrVO}}_{3}$ are investigated with a first-principles density-functional-theory-plus-$U$ ($\mathrm{DFT}+U$) method. The lowest energy states are antiferromagnetic charge-ordered Mott-insulating phases. In one of these insulating phases, layered charge or…

[Phys. Rev. Lett. 118, 087602] Published Fri Feb 24, 2017

]]>Based on protein structural ensembles determined by nuclear magnetic resonance, we study the position fluctuations of residues by calculating distance-dependent correlations and conducting finite-size scaling analysis. The fluctuations exhibit high susceptibility and long-range correlations up to th…

[Phys. Rev. Lett. 118, 088102] Published Fri Feb 24, 2017

]]>In this Letter we investigate a direct relationship between a graph’s topology and the free energy of a spin system on the graph. We develop a method of separating topological and energetic contributions to the free energy, and find that considering the topology is sufficient to qualitatively compar…

[Phys. Rev. Lett. 118, 088302] Published Fri Feb 24, 2017

]]>Quantum entanglement is one of the most prominent features of quantum mechanics and forms the basis of quantum information technologies. Here we present a novel method for the creation of quantum entanglement in multipartite and high-dimensional systems. The two ingredients are (i) superposition of …

[Phys. Rev. Lett. 118, 080401] Published Thu Feb 23, 2017

]]>Topological orders can be used as media for topological quantum computing—a promising quantum computation model due to its invulnerability against local errors. Conversely, a quantum simulator, often regarded as a quantum computing device for special purposes, also offers a way of characterizing top…

[Phys. Rev. Lett. 118, 080502] Published Thu Feb 23, 2017

]]>The decoupling technique is a fundamental tool in quantum information theory with applications ranging from thermodynamics to many-body physics and black hole radiation whereby a quantum system is decoupled from another one by discarding an appropriately chosen part of it. Here, we introduce catalyt…

[Phys. Rev. Lett. 118, 080503] Published Thu Feb 23, 2017

]]>We study the ergodic-nonergodic transition in a generalized Dicke model with independent corotating and counterrotating light-matter coupling terms. By studying level statistics, the average ratio of consecutive level spacings, and the quantum butterfly effect (out-of-time correlation) as a dynamica…

[Phys. Rev. Lett. 118, 080601] Published Thu Feb 23, 2017

]]>Knowledge about the electronic motion in molecules is essential for our understanding of chemical reactions and biological processes. The advent of attosecond techniques opens up the possibility to induce electronic motion, observe it in real time, and potentially steer it. A fundamental question re…

[Phys. Rev. Lett. 118, 083001] Published Thu Feb 23, 2017

]]>We show that four heavy fermions interacting resonantly with a lighter atom ($4+1$ system) become Efimovian at mass ratio 13.279(2), which is smaller than the corresponding $2+1$ and $3+1$ thresholds. We thus predict the five-body Efimov effect for this system in the regime where any of its subsystem is n…

[Phys. Rev. Lett. 118, 083002] Published Thu Feb 23, 2017

]]>High-speed video and modeling reveal the conditions under which water drops explode when they’re frozen from the outside in.

[Phys. Rev. Lett. 118, 084101] Published Thu Feb 23, 2017

]]>The discovery of topological acoustics has revolutionized fundamental concepts of sound propagation, giving rise to strikingly unconventional acoustic edge modes immune to scattering. Because of the spinless nature of sound, the “spinlike” degree of freedom crucial to topological states in acoustic …

[Phys. Rev. Lett. 118, 084303] Published Thu Feb 23, 2017

]]>We study the impact of the nonanalytic reconstruction of vortex cores on static vortex structures in weakly coupled superfluids. We show that, in rotating two-dimensional systems, the Abrikosov vortex lattice is unstable to vortex core deformation: Each zero of the wave function becomes a cut of fin…

[Phys. Rev. Lett. 118, 085303] Published Thu Feb 23, 2017

]]>We propose that in a certain class of magnetic materials, known as non-Kramers “spin ice,” disorder induces quantum entanglement. Instead of driving glassy behavior, disorder provokes quantum superpositions of spins throughout the system and engenders an associated emergent gauge structure and set o…

[Phys. Rev. Lett. 118, 087203] Published Thu Feb 23, 2017

]]>The spatial resolution of imaging magnetometers has benefited from scanning probe techniques. The requirement that the sample perturbs the scanning probe through a magnetic field external to its volume limits magnetometry to samples with pre-existing magnetization. We propose a magnetometer in which…

[Phys. Rev. Lett. 118, 087601] Published Thu Feb 23, 2017

]]>Crystals with low latent heat are predicted to melt from an entropically stabilized body-centered cubic symmetry. At this weakly first-order transition, strongly correlated fluctuations are expected to emerge, which could change the nature of the transition. Here we show how large fluctuations stabi…

[Phys. Rev. Lett. 118, 088003] Published Thu Feb 23, 2017

]]>We study the critical behavior of a general contagion model where nodes are either active (e.g., with opinion $A$, or functioning) or inactive (e.g., with opinion $B$, or damaged). The transitions between these two states are determined by (i) spontaneous transitions independent of the neighborhood, (ii…

[Phys. Rev. Lett. 118, 088301] Published Thu Feb 23, 2017

]]>We investigate a new constraint on new-physics interpretations of the anomalies observed in $B\to {D}^{(*)}\tau \nu $ decays making use of the lifetime of the ${B}_{c}^{-}$ meson. A constraint is obtained by demanding that the rate for ${B}_{c}^{-}\to {\tau}^{-}\overline{\nu}$ does not exceed the fraction of the total width that is allowed by the calculation…

[Phys. Rev. Lett. 118, 081802] Published Wed Feb 22, 2017

]]>We propose a scheme to simulate topological physics within a single degenerate cavity, whose modes are mapped to lattice sites. A crucial ingredient of the scheme is to construct a sharp boundary so that the open boundary condition can be implemented for this effective lattice system. In doing so, t…

[Phys. Rev. Lett. 118, 083603] Published Wed Feb 22, 2017

]]>It is a common knowledge that an effective interaction of a quantum impurity with an electromagnetic field can be screened by surrounding charge carriers, whether mobile or static. Here we demonstrate that very strong, “anomalous” screening can take place in the presence of a neutral, weakly polariz…

[Phys. Rev. Lett. 118, 085302] Published Wed Feb 22, 2017

]]>The quantitative analysis of electron-optical phase images recorded using off-axis electron holography often relies on the use of computer simulations of electron propagation through a sample. However, simulations that make use of the independent atom approximation are known to overestimate experime…

[Phys. Rev. Lett. 118, 086101] Published Wed Feb 22, 2017

]]>Photoemission spectroscopy has detected two different populations of spin-polarized electrons that are “hidden” within a layered, graphene-like material.

[Phys. Rev. Lett. 118, 086402] Published Wed Feb 22, 2017

]]>[Phys. Rev. Lett. 118, 089601] Published Wed Feb 22, 2017

]]>[Phys. Rev. Lett. 118, 089602] Published Wed Feb 22, 2017

]]>[Phys. Rev. Lett. 118, 089901] Published Wed Feb 22, 2017

]]>[Phys. Rev. Lett. 118, 089902] Published Wed Feb 22, 2017

]]>Machine learning is a fascinating and exciting field within computer science. Recently, this excitement has been transferred to the quantum information realm. Currently, all proposals for the quantum version of machine learning utilize the finite-dimensional substrate of discrete variables. Here we …

[Phys. Rev. Lett. 118, 080501] Published Tue Feb 21, 2017

]]>We propose a new approach towards analytically solving for the dynamical content of conformal field theories (CFTs) using the bootstrap philosophy. This combines the original bootstrap idea of Polyakov with the modern technology of the Mellin representation of CFT amplitudes. We employ exchange Witt…

[Phys. Rev. Lett. 118, 081601] Published Tue Feb 21, 2017

]]>All $N=4$ conformal supergravities in four space-time dimensions are constructed. These are the only $N=4$ supergravity theories whose actions are invariant under off-shell supersymmetry. They are encoded in terms of a holomorphic function that is homogeneous of zeroth degree in scalar fields that param…

[Phys. Rev. Lett. 118, 081602] Published Tue Feb 21, 2017

]]>The LHCb Collaboration reports the rarest (8 in 100 million events) fully hadronic ${B}^{0}$ meson decay ever observed.

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

]]>The first lattice QCD calculation of the form factors governing ${\mathrm{\Lambda}}_{c}\to \mathrm{\Lambda}{\ell}^{+}{\nu}_{\ell}$ decays is reported. The calculation was performed with two different lattice spacings and includes one ensemble with a pion mass of 139(2) MeV. The resulting predictions for the ${\mathrm{\Lambda}}_{c}\to \mathrm{\Lambda}{e}^{+}{\nu}_{e}$ and ${\mathrm{\Lambda}}_{c}\to \mathrm{\Lambda}{\mu}^{+}{\nu}_{\mu}$ decay rates divided by $|{V}_{cs}{\dots}^{}$

[Phys. Rev. Lett. 118, 082001] Published Tue Feb 21, 2017

]]>The interaction of spin and intrinsic orbital angular momentum of light is observed, as evidenced by length-dependent rotations of both spatial patterns and optical polarization in a cylindrically symmetric isotropic optical fiber. Such rotations occur in a straight few-mode fiber when superposition…

[Phys. Rev. Lett. 118, 083601] Published Tue Feb 21, 2017

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

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

]]>We report on the experimental observation of extreme laser spectral broadening and a change in optical transmission in gallium phosphite induced by $\text{25\hspace{0.17em}\hspace{0.17em}}\mathrm{MV}/\mathrm{cm}$ terahertz (THz) single-cycle internal field. Such intense THz radiation leads to twofold transient modifications of the optical properties in …

[Phys. Rev. Lett. 118, 083901] Published Tue Feb 21, 2017

]]>We investigate the mechanical response of thin sheets perforated with a square array of mutually orthogonal cuts, which leaves a network of squares connected by small ligaments. Our combined analytical, experimental and numerical results indicate that under uniaxial tension the ligaments buckle out …

[Phys. Rev. Lett. 118, 084301] Published Tue Feb 21, 2017

]]>We demonstrate both numerically and experimentally that geometric frustration in two-dimensional periodic acoustic networks consisting of arrays of narrow air channels can be harnessed to form band gaps (ranges of frequency in which the waves cannot propagate in any direction through the system). Wh…

[Phys. Rev. Lett. 118, 084302] Published Tue Feb 21, 2017

]]>We present a detailed study of magnetic reconnection in a quasi-two-dimensional pulsed-power driven laboratory experiment. Oppositely directed magnetic fields ($B=3\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{T}$), advected by supersonic, sub-Alfvénic carbon plasma flows (${V}_{\mathrm{in}}=50\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{km}/\mathrm{s}$), are brought together and mutually annihilate inside a thin…

[Phys. Rev. Lett. 118, 085001] Published Tue Feb 21, 2017

]]>Simulations suggest collisionless steady-state magnetic reconnection of Harris-type current sheets proceeds with a rate of order 0.1, independent of dissipation mechanism. We argue this long-standing puzzle is a result of constraints at the magnetohydrodynamic (MHD) scale. We predict the reconnectio…

[Phys. Rev. Lett. 118, 085101] Published Tue Feb 21, 2017

]]>We find a first-order transition driven by the strength of nonequilibrium conditions of one-dimensional driven open condensates. Associated with this transition is a new stable nonequilibrium phase, space-time vortex turbulence, whose vortex density and quasiparticle distribution show strongly nonth…

[Phys. Rev. Lett. 118, 085301] Published Tue Feb 21, 2017

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

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

]]>We investigate the phase diagram of the spin-orbit-coupled three orbital Hubbard model at arbitrary filling by means of dynamical mean-field theory combined with the continuous-time quantum Monte Carlo method. We find that the spin-freezing crossover occurring in the metallic phase of the nonrelativ…

[Phys. Rev. Lett. 118, 086401] Published Tue Feb 21, 2017

]]>It was proposed recently that the out-of-time-ordered four-point correlator (OTOC) may serve as a useful characteristic of quantum-chaotic behavior, because, in the semiclassical limit $\hslash \to 0$, its rate of exponential growth resembles the classical Lyapunov exponent. Here, we calculate the four-point co…

[Phys. Rev. Lett. 118, 086801] Published Tue Feb 21, 2017

]]>Bilayer transition metal dichalcogenides (TMDs) belong to a class of materials with two unique features, the coupled spin-valley-layer degrees of freedom and the crystal structure that is globally centrosymmetric but locally noncentrosymmetric. In this Letter, we will show that the combination of th…

[Phys. Rev. Lett. 118, 087001] Published Tue Feb 21, 2017

]]>We investigate the nonequilibrium dynamics of competing coexisting superconducting (SC) and charge-density wave (CDW) orders in an attractive Hubbard model. A time-periodic laser field $\overrightarrow{A}(t)$ lifts the SC-CDW degeneracy, since the CDW couples linearly to the field ($\overrightarrow{A}$), whereas SC couples in second o…

[Phys. Rev. Lett. 118, 087002] Published Tue Feb 21, 2017

]]>A symmetry-protected topological phase has nontrivial surface states in the presence of certain symmetries, which can either be gapless or be degenerate. In this work, we study the physical consequence of such gapless surface states at the bulk quantum phase transition (QPT) that spontaneously break…

[Phys. Rev. Lett. 118, 087201] Published Tue Feb 21, 2017

]]>The internal and lattice structures of magnetic Skyrmions in $B20$-type FeGe are investigated using off-axis electron holography. The temperature, magnetic field, and angular dependence of the magnetic moments of individual Skyrmions are analyzed. The internal Skyrmion shape is found to vary with appl…

[Phys. Rev. Lett. 118, 087202] Published Tue Feb 21, 2017

]]>Ultrafast pump-probe measurements of plasmonic nanostructures probe the nonequilibrium behavior of excited carriers, which involves several competing effects obscured in typical empirical analyses. Here we present pump-probe measurements of plasmonic nanoparticles along with a complete theoretical d…

[Phys. Rev. Lett. 118, 087401] Published Tue Feb 21, 2017

]]>Recent studies of cooled oil emulsion droplets uncovered transformations into a host of flattened shapes with straight edges and sharp corners, driven by a partial phase transition of the bulk liquid phase. Here, we explore theoretically the simplest geometric competition between this phase transiti…

[Phys. Rev. Lett. 118, 088001] Published Tue Feb 21, 2017

]]>We derive the constitutive equations of an active polar gel from a model for the dynamics of elastic molecules that link polar elements. Molecular binding kinetics induces the fluidization of the material, giving rise to Maxwell viscoelasticity and, provided that detailed balance is broken, to the g…

[Phys. Rev. Lett. 118, 088002] Published Tue Feb 21, 2017

]]>The folding and binding of biomolecules into functional conformations are thought to be commonly mediated by multiple pathways rather than a unique route. Yet even in experiments where one can “see” individual conformational transitions, their stochastic nature generally precludes one from determini…

[Phys. Rev. Lett. 118, 088101] Published Tue Feb 21, 2017

]]>We propose a scheme for digital quantum simulation of lattice gauge theories with dynamical fermions. Using a layered optical lattice with ancilla atoms that can move and interact with the other atoms (simulating the physical degrees of freedom), we obtain a stroboscopic dynamics which yields the fo…

[Phys. Rev. Lett. 118, 070501] Published Fri Feb 17, 2017

]]>We study the performance of the D-Wave 2X quantum annealing machine on systems with well-controlled ground-state degeneracy. While obtaining the ground state of a spin-glass benchmark instance represents a difficult task, the gold standard for any optimization algorithm or machine is to sample all s…

[Phys. Rev. Lett. 118, 070502] Published Fri Feb 17, 2017

]]>Instantaneous quantum computing is a subuniversal quantum complexity class, whose circuits have proven to be hard to simulate classically in the discrete-variable realm. We extend this proof to the continuous-variable (CV) domain by using squeezed states and homodyne detection, and by exploring the …

[Phys. Rev. Lett. 118, 070503] Published Fri Feb 17, 2017

]]>Quantum illumination consists in shining quantum light on a target region immersed in a bright thermal bath with the aim of detecting the presence of a possible low-reflective object. If the signal is entangled with the receiver, then a suitable choice of the measurement offers a gain with respect t…

[Phys. Rev. Lett. 118, 070803] Published Fri Feb 17, 2017

]]>We numerically study the zero temperature phase structure of the multiflavor Schwinger model at nonzero chemical potential. Using matrix product states, we reproduce analytical results for the phase structure for two flavors in the massless case and extend the computation to the massive case, where …

[Phys. Rev. Lett. 118, 071601] Published Fri Feb 17, 2017

]]>We report the first calculation of fully differential jet production at leading color in all partonic channels at next-to-next-to leading order in perturbative QCD and compare to the available ATLAS 7 TeV data. We discuss the size and shape of the perturbative corrections along with their associated…

[Phys. Rev. Lett. 118, 072002] Published Fri Feb 17, 2017

]]>We demonstrate that the quantum phase transition (QPT) of the Rabi model and critical dynamics near the QPT can be probed in the setup of a single trapped ion. We first demonstrate that there exists equilibrium and nonequilibrium scaling functions of the Rabi model by finding a proper rescaling of t…

[Phys. Rev. Lett. 118, 073001] Published Fri Feb 17, 2017

]]>We demonstrate a generally applicable technique for mixing two-species quantum degenerate bosonic samples in the presence of an optical lattice, and we employ it to produce low-entropy samples of ultracold ${}^{87}\mathrm{Rb}{}^{133}\mathrm{Cs}$ Feshbach molecules with a lattice filling fraction exceeding 30%. Starting from two …

[Phys. Rev. Lett. 118, 073201] Published Fri Feb 17, 2017

]]>We calculate that an appropriate modification of the field associated with only one of the photons of a photon pair can suppress generation of the pair entirely. From this general result, we develop a method for suppressing the generation of undesired photon pairs utilizing photonic stop bands. For …

[Phys. Rev. Lett. 118, 073603] Published Fri Feb 17, 2017

]]>An evanescent optical mode existing in various nanophotonic structures always acts as a cavity mode rather than an electromagnetic vacuum in the study of cavity quantum electrodynamics (CQED). Here we show that taking the evanescent mode as an electromagnetic vacuum in which the nanocavity is locate…

[Phys. Rev. Lett. 118, 073604] Published Fri Feb 17, 2017

]]>We theoretically study the propagation and storage of a classical field in a $\mathrm{\Lambda}$-type atomic medium using coherent population oscillations (CPOs). We show that the propagation eigenmodes strongly relate to the different CPO modes of the system. Light storage in such modes is discussed by introducing a…

[Phys. Rev. Lett. 118, 073605] Published Fri Feb 17, 2017

]]>The route to miniaturization of laser systems has so far led to the utilization of diverse materials and techniques for reaching the desired laser oscillation at small scales. Unfortunately, at some point all approaches encounter a trade-off between the system dimensions and the $Q$ factor, especially…

[Phys. Rev. Lett. 118, 073901] Published Fri Feb 17, 2017

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

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

]]>We explore the scaling behavior of an unsteady flow that is generated by an oscillating body of finite size in a gas. If the gas is gradually rarefied, the Navier-Stokes equations begin to fail and a kinetic description of the flow becomes more appropriate. The failure of the Navier-Stokes equations…

[Phys. Rev. Lett. 118, 074505] Published Fri Feb 17, 2017

]]>We investigate numerically, for the first time, the thermal counterflow of superfluid helium past a cylinder by solving with a finite volume method the complete so-called two-fluid model. In agreement with existing experimental results, we obtain symmetrical eddies both up- and downstream of the obs…

[Phys. Rev. Lett. 118, 074506] Published Fri Feb 17, 2017

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

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

]]>We present a two-dimensional (2D) lattice model that exhibits a nontrivial topological phase in the absence of the Berry curvature. Instead, the Berry connection provides the topological nontrivial phase in the model, whose integration over the momentum space, the so-called 2D Zak phase, yields a fr…

[Phys. Rev. Lett. 118, 076803] Published Fri Feb 17, 2017

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

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

]]>Spatially localized defect structures emerge spontaneously in a hydrodynamic description of an active polar fluid comprising polar “actin” filaments and “myosin” motor proteins that (un)bind to filaments and exert active contractile stresses. These emergent defect structures are characterized by dis…

[Phys. Rev. Lett. 118, 078104] Published Fri Feb 17, 2017

]]>We reveal a hierarchical, multilayer organization of finite components—i.e., tendrils and tubes—around the giant connected components in directed networks and propose efficient algorithms allowing one to uncover the entire organization of key real-world directed networks, such as the World Wide Web,…

[Phys. Rev. Lett. 118, 078301] Published Fri Feb 17, 2017

]]>[Phys. Rev. Lett. 118, 079901] Published Fri Feb 17, 2017

]]>In an isolated single-particle quantum system, a spatial disorder can induce Anderson localization. Being a result of interference, this phenomenon is expected to be fragile in the face of dissipation. Here we show that a proper dissipation can drive a disordered system into a steady state with tuna…

[Phys. Rev. Lett. 118, 070402] Published Thu Feb 16, 2017

]]>A spin-polarizing electron beam splitter is described that relies on an arrangement of linearly polarized laser waves of nonrelativistic intensity. An incident electron beam is first coherently scattered off a bichromatic laser field, splitting the beam into two portions, with electron spin and mome…

[Phys. Rev. Lett. 118, 070403] Published Thu Feb 16, 2017

]]>Decays of the ${\mathrm{\Xi}}_{b}^{-}$ and ${\mathrm{\Omega}}_{b}^{-}$ baryons to the charmless final states $p{h}^{-}{h}^{\prime -}$, where ${h}^{(\prime )}$ denotes a kaon or pion, are searched for with the LHCb detector. The analysis is based on a sample of proton-proton collision data collected at center-of-mass energies $\sqrt{s}=7$ and 8 TeV, corresponding to an integrated lum…

[Phys. Rev. Lett. 118, 071801] Published Thu Feb 16, 2017

]]>We report on new results of a search for a two-photon interaction with axionlike particles (ALPs). The experiment is carried out at a synchrotron radiation facility using a “light shining through a wall (LSW)” technique. For this purpose, we develop a novel pulsed-magnet system, composed of multiple…

[Phys. Rev. Lett. 118, 071803] Published Thu Feb 16, 2017

]]>The $\beta $-decay half-lives of 94 neutron-rich nuclei ${}^{144-151}\mathrm{Cs}$, ${}^{146-154}\mathrm{Ba}$, ${}^{148-156}\mathrm{La}$, ${}^{150-158}\mathrm{Ce}$, ${}^{153-160}\mathrm{Pr}$, ${}^{156-162}\mathrm{Nd}$, ${}^{159-163}\mathrm{Pm}$, ${}^{160-166}\mathrm{Sm}$, ${}^{161-168}\mathrm{Eu}$, ${}^{165-170}\mathrm{Gd}$, ${}^{166-172}\mathrm{Tb}$, ${}^{169-173}\mathrm{Dy}$, ${}^{172-175}\mathrm{Ho}$, and two isomeric states ${}^{174m}\mathrm{Er}$, ${}^{172m}\mathrm{Dy}$ were measured at the Radioactive Isotope Beam Factory, providing a ne…

[Phys. Rev. Lett. 118, 072701] Published Thu Feb 16, 2017

]]>We consider a spinless ultracold Fermi gas tightly trapped along the axis of an optical resonator and transversely illuminated by a laser closely tuned to a resonator mode. At a certain threshold pump intensity, the homogeneous gas density breaks a ${\mathbf{Z}}_{2}$ symmetry towards a spatially periodic order, whi…

[Phys. Rev. Lett. 118, 073602] Published Thu Feb 16, 2017

]]>We use highly resolved numerical simulations to study turbulent Rayleigh-Bénard convection in a cell with sinusoidally rough upper and lower surfaces in two dimensions for $\mathrm{Pr}=1$ and $\mathrm{Ra}=[4\times 1{0}^{6},3\times 1{0}^{9}]$. By varying the wavelength $\lambda $ at a fixed amplitude, we find an optimal wavelength ${\lambda}_{\mathrm{opt}}$ for which the Nu…

[Phys. Rev. Lett. 118, 074503] Published Thu Feb 16, 2017

]]>A generalized image charge formulation is proposed for the Green’s function of a core-shell dielectric nanoparticle for which theoretical and simulation investigations are rarely reported due to the difficulty of resolving the dielectric heterogeneity. Based on the formulation, an efficient and accu…

[Phys. Rev. Lett. 118, 076102] Published Thu Feb 16, 2017

]]>Rate and state friction (RSF) laws are widely used empirical relationships that describe the macroscale frictional behavior of a broad range of materials, including rocks found in the seismogenic zone of Earth’s crust. A fundamental aspect of the RSF laws is frictional “aging,” where friction increa…

[Phys. Rev. Lett. 118, 076103] Published Thu Feb 16, 2017

]]>The entanglement entropy (EE) has emerged as an important window into the structure of complex quantum states of matter. We analyze the universal part of the EE for gapless systems on tori in 2D and 3D, denoted by $\chi $. Focusing on scale-invariant systems, we derive general nonperturbative properties f…

[Phys. Rev. Lett. 118, 077202] Published Thu Feb 16, 2017

]]>Cells move differently on substrates with different rigidities: the persistence time of their motion is higher on stiffer substrates. We show that this behavior—in and of itself—results in a net flux of cells directed up a soft-to-stiff gradient. Using simple random walk models with varying persiste…

[Phys. Rev. Lett. 118, 078103] Published Thu Feb 16, 2017

]]>A quantum mechanical transition path time probability distribution is formulated and its properties are studied using a parabolic barrier potential model. The average transit time is well defined and readily calculated. It is smaller than the analogous classical mechanical average transit time, vani…

[Phys. Rev. Lett. 118, 070401] Published Wed Feb 15, 2017

]]>Every imaging system has a resolution limit, typically defined by Rayleigh’s criterion. Given a fixed number of photons, the amount of information one can gain from an image about the separation between two sources falls to zero as the separation drops below this limit, an effect dubbed “Rayleigh’s …

[Phys. Rev. Lett. 118, 070801] Published Wed Feb 15, 2017

]]>Weak value amplification (WVA) is a technique by which one can magnify the apparent strength of a measurement signal. Some have claimed that WVA can outperform more conventional measurement schemes in parameter estimation. Nonetheless, a significant body of theoretical work has challenged this persp…

[Phys. Rev. Lett. 118, 070802] Published Wed Feb 15, 2017

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

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

]]>The small-$x$ gluon in global fits of parton distributions is affected by large uncertainties from the lack of direct experimental constraints. In this Letter, we provide a precision determination of the small-$x$ gluon from the exploitation of forward charm production data provided by LHCb for three di…

[Phys. Rev. Lett. 118, 072001] Published Wed Feb 15, 2017

]]>This Letter reports on the first demonstration of laser-assisted ${\mathrm{H}}^{-}$ charge exchange for microsecond duration ${\mathrm{H}}^{-}$ beam pulses. Laser-assisted charge exchange injection is a breakthrough technology that overcomes long-standing limitations associated with the traditional method of producing high intensi…

[Phys. Rev. Lett. 118, 074801] Published Wed Feb 15, 2017

]]>A method to determine surface recombination velocities at collecting contacts in interface-limited organic semiconductor devices, based on the extraction of injected carrier reservoirs in a single-carrier sandwich-type structure, is presented. The analytical framework is derived and verified with dr…

[Phys. Rev. Lett. 118, 076601] Published Wed Feb 15, 2017

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