We give a systematic derivation of positive lower bounds for the expected entropy production (EP) rate in classical statistical mechanical systems obeying a dynamical large deviation principle. The logic is the same for the return to thermodynamic equilibrium as it is for steady nonequilibria workin...

[Phys. Rev. Lett. 119, 160601] Published Tue Oct 17, 2017

]]>A pulsar PSR J1023+0038 switches between two states that have different spin-down rates. A new analysis suggests that this discrepancy may be due to gravitational wave emission.

[Phys. Rev. Lett. 119, 161103] Published Tue Oct 17, 2017

]]>Numerical evidence is provided for self-sustaining dynamo action in a confined electrically conducting fluid, such as an astrophysical accretion disc.

[Phys. Rev. Lett. 119, 164501] Published Tue Oct 17, 2017

]]>We present experimental studies on ion acceleration using an 800-nm circularly polarized laser pulse with a peak intensity of $6.9\times {10}^{19}\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{W}/{\mathrm{cm}}^{2}$ interacting with an overdense plasma that is produced by a laser prepulse ionizing an initially ultrathin plastic foil. The proton spectra exhibit spectral pe...

[Phys. Rev. Lett. 119, 164801] Published Tue Oct 17, 2017

]]>A proposed set of experiments could offer a direct measurement of the fundamental quantum property that distinguishes fermions from bosons.

[Phys. Rev. Lett. 119, 160401] Published Mon Oct 16, 2017

]]>For the first time, researchers have detected both light and gravitational waves from the same event in space.

[Phys. Rev. Lett. 119, 161101] Published Mon Oct 16, 2017

]]>Higgs plus multigluon amplitudes in QCD can be computed in an effective Lagrangian description. In the infinite top-mass limit, an amplitude with a Higgs boson and $n$ gluons is computed by the form factor of the operator $\mathrm{Tr}{F}^{2}$. Up to two loops and for three gluons, its maximally transcendental part is...

[Phys. Rev. Lett. 119, 161601] Published Mon Oct 16, 2017

]]>We develop general counting formulas for primary fields in free four dimensional (4D) scalar conformal field theory (CFT). Using a duality map between primary operators in scalar field theory and multivariable polynomial functions subject to differential constraints, we identify a sector of holomorp...

[Phys. Rev. Lett. 119, 161602] Published Mon Oct 16, 2017

]]>Here we show scanning tunneling microscopy (STM), noncontact atomic force microscopy (AFM), and inelastic electron tunneling spectroscopy (IETS) measurements on an organic molecule with a CO-terminated tip at 5 K. The high-resolution contrast observed simultaneously in all channels unambiguously dem...

[Phys. Rev. Lett. 119, 166001] Published Mon Oct 16, 2017

]]>Electron tomography bears promise for widespread determination of the three-dimensional arrangement of atoms in solids. However, it remains unclear whether methods successful for crystals are optimal for amorphous solids. Here, we explore the relative difficulty encountered in atomic-resolution tomo...

[Phys. Rev. Lett. 119, 166101] Published Mon Oct 16, 2017

]]>We present an embedded-cluster method, based on the triply irreducible local expansion formalism. It turns the Fierz ambiguity, inherent to approaches based on a bosonic decoupling of local fermionic interactions, into a convergence criterion. It is based on the approximation of the three-leg vertex...

[Phys. Rev. Lett. 119, 166401] Published Mon Oct 16, 2017

]]>Quantum tomography is a critically important tool to evaluate quantum hardware, making it essential to develop optimized measurement strategies that are both accurate and efficient. We compare a variety of strategies using nearly pure test states. Those that are informationally complete for all stat...

[Phys. Rev. Lett. 119, 150401] Published Fri Oct 13, 2017

]]>The operational characterization of quantum coherence is the cornerstone in the development of the resource theory of coherence. We introduce a new coherence quantifier based on maximum relative entropy. We prove that the maximum relative entropy of coherence is directly related to the maximum overl...

[Phys. Rev. Lett. 119, 150405] Published Fri Oct 13, 2017

]]>We report the demonstration of a mirrorless optical parametric oscillator with a tunable threshold in laser-cooled atoms with four-wave mixing (FWM) using electromagnetically induced transparency. Driven by two classical laser beams, the generated Stokes and anti-Stokes fields counterpropagate and b...

[Phys. Rev. Lett. 119, 150406] Published Fri Oct 13, 2017

]]>We consider quantum key distribution (QKD) and entanglement distribution using a single-sender multiple-receiver pure-loss bosonic broadcast channel. We determine the unconstrained capacity region for the distillation of bipartite entanglement and secret key between the sender and each receiver, whe...

[Phys. Rev. Lett. 119, 150501] Published Fri Oct 13, 2017

]]>We autonomously stabilize arbitrary states of a qubit through parametric modulation of the coupling between a fixed frequency qubit and resonator. The coupling modulation is achieved with a tunable coupling design, in which the qubit and the resonator are connected in parallel to a superconducting q...

[Phys. Rev. Lett. 119, 150502] Published Fri Oct 13, 2017

]]>A four-qubit entangled state is created in a scalable ion trap system, with fidelity exceeding 90%.

[Phys. Rev. Lett. 119, 150503] Published Fri Oct 13, 2017

]]>Results are reported from a search for supersymmetric particles in proton-proton collisions in the final state with a single lepton, multiple jets, including at least one $b$-tagged jet, and large missing transverse momentum. The search uses a sample of proton-proton collision data at $\sqrt{s}=13\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{TeV}$ record...

[Phys. Rev. Lett. 119, 151802] Published Fri Oct 13, 2017

]]>The differential production cross sections of ${B}^{\pm}$ mesons are measured via the exclusive decay channels ${B}^{\pm}\to J/\psi {K}^{\pm}\to {\mu}^{+}{\mu}^{-}{K}^{\pm}$ as a function of transverse momentum in $p$$p$ and Pb-Pb collisions at a center-of-mass energy $\sqrt{{s}_{NN}}=5.02\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{TeV}$ per nucleon pair with the CMS detector at the LHC. The $pp(\mathrm{Pb-Pb})$ data set use...

[Phys. Rev. Lett. 119, 152301] Published Fri Oct 13, 2017

]]>A Kuznetsov-Ma soliton that exhibits an unusual pulsating dynamics has attracted particular attention in hydrodynamics and plasma physics in the context of understanding nonlinear coherent phenomena. Here, we demonstrate theoretically the formation of a novel form of Kuznetsov-Ma soliton in a microf...

[Phys. Rev. Lett. 119, 153901] Published Fri Oct 13, 2017

]]>Inks of permanent markers and waterproof cosmetics create elastic thin films upon application on a surface. Such adhesive materials are deliberately designed to exhibit water-repellent behavior. Therefore, patterns made up of these inks become resistant to moisture and cannot be cleaned by water aft...

[Phys. Rev. Lett. 119, 154502] Published Fri Oct 13, 2017

]]>Spatial properties of high-order harmonic beams produced by high-intensity laser-matter interactions carry rich information on the physics of the generation process, and their detailed understanding is essential for applications of these light beams. We present a thorough study of these properties i...

[Phys. Rev. Lett. 119, 155001] Published Fri Oct 13, 2017

]]>We propose a simple theory for the dynamics of model glass-forming fluids, which should be solvable using a mean-field-like approach. The theory is based on transparent physical assumptions, which can be tested in computer simulations. The theory predicts an ergodicity-breaking transition that is id...

[Phys. Rev. Lett. 119, 155502] Published Fri Oct 13, 2017

]]>A new topological semimetal state is predicted, featuring three-dimensional band crossings that manifest as perpendicular, nontrivial links.

[Phys. Rev. Lett. 119, 156401] Published Fri Oct 13, 2017

]]>We investigate the time evolution of the Kondo resonance in response to a quench by applying the time-dependent numerical renormalization group (TDNRG) approach to the Anderson impurity model in the strong correlation limit. For this purpose, we derive within the TDNRG approach a numerically tractab...

[Phys. Rev. Lett. 119, 156601] Published Fri Oct 13, 2017

]]>The interplays between different quasiparticles in solids lay the foundation for a wide spectrum of intriguing quantum effects, yet how the collective plasmon excitations affect the quantum transport of electrons remains largely unexplored. Here we provide the first demonstration that when the elect...

[Phys. Rev. Lett. 119, 156803] Published Fri Oct 13, 2017

]]>High-temperature superconductivity is closely adjacent to a long-range antiferromagnet, which is called a parent compound. In cuprates, all parent compounds are alike and carrier doping leads to superconductivity, so a unified phase diagram can be drawn. However, the properties of parent compounds f...

[Phys. Rev. Lett. 119, 157001] Published Fri Oct 13, 2017

]]>Using computer simulations, we investigate the phase behavior of a system of particles interacting with a remarkably simple repulsive square-shoulder pair potential and report the formation of a novel (and stable) pyrochlorelike crystal phase. The lattice structure of the pyrochlorelike phase formed...

[Phys. Rev. Lett. 119, 157401] Published Fri Oct 13, 2017

]]>Entanglement in quantum mechanics contradicts local realism and is a manifestation of quantum nonlocality. Its presence can be detected through the violation of Bell, or Clauser-Horne-Shimony-Holt (CHSH) inequalities. Paradigmatic quantum systems provide examples of both, nonentangled and entangled ...

[Phys. Rev. Lett. 119, 157702] Published Fri Oct 13, 2017

]]>The absorption of light to create Wannier-Mott excitons is a fundamental feature dictating the optical and photovoltaic properties of low band gap, high permittivity semiconductors. Such excitons, with an electron-hole separation an order of magnitude greater than lattice dimensions, are largely lim...

[Phys. Rev. Lett. 119, 157703] Published Fri Oct 13, 2017

]]>A strong nonlinear coupling between harmonic oscillators is highly desirable for quantum information processing and quantum simulation, but is difficult to achieve in many physical systems. Here, we exploit the Coulomb interaction between two trapped ions to achieve strong nonlinear coupling between...

[Phys. Rev. Lett. 119, 150404] Published Thu Oct 12, 2017

]]>It is a challenging task to explain, in terms of a simple and compelling new physics scenario, the intriguing discrepancies between the standard model expectations and the data for the neutral-current observables ${R}_{K}$ and ${R}_{{K}^{*}}$, as well as the charged-current observables $R(D)$ and $R({D}^{*})$. We show that thi...

[Phys. Rev. Lett. 119, 151801] Published Thu Oct 12, 2017

]]>Researchers have directed the motion of a domain-wall-like topological defect through a crystal of trapped ions.

[Phys. Rev. Lett. 119, 153602] Published Thu Oct 12, 2017

]]>Using two-dimensional hybrid-kinetic simulations, we explore the nonlinear “interruption” of standing and traveling shear-Alfvén waves in collisionless plasmas. Interruption involves a self-generated pressure anisotropy removing the restoring force of a linearly polarized Alfvénic perturbation, and ...

[Phys. Rev. Lett. 119, 155101] Published Thu Oct 12, 2017

]]>We report a new phase called clinohexagonal prism (CHP) that accounts for all the ground states of dipolar hard spheres prepared at any density. This phase merely consists of an oblique prismatic lattice with a hexagonal base. Our calculations show that at intermediate densities, a special close pac...

[Phys. Rev. Lett. 119, 155501] Published Thu Oct 12, 2017

]]>Polarized neutron scattering has been used to obtain the magnetic moment at specific crystallographic sites of the austenitic and martensitic phases of two nonstoichiometric Ni-Mn-Ga single crystals with close composition. These alloys have been chosen because they exhibit different structures in th...

[Phys. Rev. Lett. 119, 155701] Published Thu Oct 12, 2017

]]>We study classical two-dimensional frustrated Heisenberg models with generically incommensurate ground states. A new theory for the lattice-nematic “order by disorder” transition is developed based on the self-consistent determination of the effective exchange coupling bonds. In our approach, fluctu...

[Phys. Rev. Lett. 119, 157202] Published Thu Oct 12, 2017

]]>We introduce a matrix-product state based method to efficiently obtain dynamical response functions for two-dimensional microscopic Hamiltonians. We apply this method to different phases of the Kitaev-Heisenberg model and identify characteristic dynamical features. In the ordered phases proximate to...

[Phys. Rev. Lett. 119, 157203] Published Thu Oct 12, 2017

]]>We measure x-ray magnetic circular dichroism (XMCD) spectra at the Pu ${M}_{4,5}$ absorption edges from a newly prepared high-quality single crystal of the heavy-fermion superconductor ${}^{242}\mathrm{Pu}{\mathrm{CoGa}}_{5}$, exhibiting a critical temperature ${T}_{c}=18.7\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{K}$. The experiment probes the vortex phase below ${T}_{c}$ and shows that a...

[Phys. Rev. Lett. 119, 157204] Published Thu Oct 12, 2017

]]>We study the statistics, in stationary conditions, of the work ${W}_{\tau}$ done by the active force in different systems of self-propelled particles in a time $\tau $. We show the existence of a critical value ${W}_{\tau}^{\u2020}$ such that fluctuations with ${W}_{\tau}>{W}_{\tau}^{\u2020}$ correspond to configurations where interaction between particle...

[Phys. Rev. Lett. 119, 158002] Published Thu Oct 12, 2017

]]>We use extremely bright and ultrashort pulses from an x-ray free-electron laser (XFEL) to measure correlations in x rays scattered from individual bioparticles. This allows us to go beyond the traditional crystallography and single-particle imaging approaches for structure investigations. We employ ...

[Phys. Rev. Lett. 119, 158102] Published Thu Oct 12, 2017

]]>We study an ensemble of strongly coupled electrons under continuous microwave irradiation interacting with a dissipative environment, a problem of relevance to the creation of highly polarized nonequilibrium states in nuclear magnetic resonance. We analyze the stationary states of the dynamics, desc...

[Phys. Rev. Lett. 119, 150402] Published Wed Oct 11, 2017

]]>Jones-Roberts solitons are the only known class of stable dark solitonic solutions of the nonlinear Schrödinger equation in two and three dimensions. They feature a distinctive elongated elliptical shape that allows them to travel without change of form. By imprinting a triangular phase pattern, we ...

[Phys. Rev. Lett. 119, 150403] Published Wed Oct 11, 2017

]]>The generation of free energy landscapes corresponding to conformational equilibria in complex molecular systems remains a significant computational challenge. Adding to this challenge is the need to represent, store, and manipulate the often high-dimensional surfaces that result from rare-event sam...

[Phys. Rev. Lett. 119, 150601] Published Wed Oct 11, 2017

]]>Numerical simulations show that an imperfection as small as three units can destabilize the many-body localized phase of a one-dimensional chain.

[Phys. Rev. Lett. 119, 150602] Published Wed Oct 11, 2017

]]>We present the calculation of dijet production, doubly differential in dijet mass ${m}_{jj}$ and rapidity difference $|{y}^{*}|$, at leading color in all partonic channels at next-to-next-to-leading order (NNLO) in perturbative QCD. We consider the long-standing problems associated with scale choice for dijet pro...

[Phys. Rev. Lett. 119, 152001] Published Wed Oct 11, 2017

]]>In this work we develop an experimental procedure to interrogate the single- and multiphoton scattering matrices of an unknown quantum system interacting with propagating photons. Our proposal requires coherent state laser or microwave inputs and homodyne detection at the scatterer’s output, and pro...

[Phys. Rev. Lett. 119, 153601] Published Wed Oct 11, 2017

]]>In thermal convection, roughness is often used as a means to enhance heat transport, expressed in Nusselt number. Yet there is no consensus on whether the Nusselt vs Rayleigh number scaling exponent ($\mathrm{Nu}\sim {\mathrm{Ra}}^{\beta}$) increases or remains unchanged. Here we numerically investigate turbulent Rayleigh-Bénard co...

[Phys. Rev. Lett. 119, 154501] Published Wed Oct 11, 2017

]]>In this Letter we give experimental grounding for the remarkable observation made by Furuberg *et al.* [Phys. Rev. Lett. **61**, 2117 (1988)] of an unusual dynamic scaling for the pair correlation function $N(r,t)$ during the slow drainage of a porous medium. Those authors use an invasion percolation algori...

[Phys. Rev. Lett. 119, 154503] Published Wed Oct 11, 2017

]]>Emergent phenomena at polar-nonpolar oxide interfaces have been studied intensely in pursuit of next-generation oxide electronics and spintronics. Here we report the disentanglement of critical thicknesses for electron reconstruction and the emergence of ferromagnetism in polar-mismatched ${\mathrm{LaMnO}}_{3}/{\mathrm{SrT...}}_{}$

[Phys. Rev. Lett. 119, 156801] Published Wed Oct 11, 2017

]]>We study hole spin resonance in a $p$-channel silicon metal-oxide-semiconductor field-effect transistor. In the subthreshold region, the measured source-drain current reveals a double dot in the channel. The observed spin resonance spectra agree with a model of strongly coupled two-spin states in the ...

[Phys. Rev. Lett. 119, 156802] Published Wed Oct 11, 2017

]]>We suggest that a randomization of the pseudodipolar interaction in the spin-orbit-generated low-energy Hamiltonian of ${\mathrm{YbMgGaO}}_{4}$ due to an inhomogeneous charge environment from a natural mixing of ${\mathrm{Mg}}^{2+}$ and ${\mathrm{Ga}}^{3+}$ can give rise to orientational spin disorder and mimic a spin-liquid-like state. In the ab...

[Phys. Rev. Lett. 119, 157201] Published Wed Oct 11, 2017

]]>To assess the role of particle roughness in the rheological phenomena of concentrated colloidal suspensions, we develop model colloids with varying surface roughness length scales up to 10% of the particle radius. Increasing surface roughness shifts the onset of both shear thickening and dilatancy t...

[Phys. Rev. Lett. 119, 158001] Published Wed Oct 11, 2017

]]>We investigate the universal scaling of protein fluctuation dynamics with a site-specific diffusive model of protein motion, which predicts an initial subdiffusive regime in the configurational relaxation. The long-time dynamics of proteins is controlled by an activated regime. We argue that the hie...

[Phys. Rev. Lett. 119, 158101] Published Wed Oct 11, 2017

]]>Environment plays a fundamental role in the competition for resources, and hence in the evolution of populations. Here, we study a well-mixed, finite population consisting of two strains competing for the limited resources provided by an environment that randomly switches between states of abundance...

[Phys. Rev. Lett. 119, 158301] Published Wed Oct 11, 2017

]]>[Phys. Rev. Lett. 119, 159901] Published Wed Oct 11, 2017

]]>X-ray free-electron lasers have been used to generate single spikes of hard x rays that are only 200 attoseconds long.

[Phys. Rev. Lett. 119, 154801] Published Tue Oct 10, 2017

]]>Hybrid improper ferroelectricity (HIF) denotes a new class of polar instability by the mixture of two octahedral-distortion modes and can feature the coexistence of abundant head-to-head and tail-to-tail polar domains, of which the domain walls tend to be charged due to the respective screening char...

[Phys. Rev. Lett. 119, 157601] Published Tue Oct 10, 2017

]]>Induced transfer of charge carriers is demonstrated in a graphene-based field-effect transistor, leading to a quantum Hall plateau.

[Phys. Rev. Lett. 119, 157701] Published Tue Oct 10, 2017

]]>New precision experiments using trapped molecular ions provide an alternative method for determining if the electron has an electric dipole moment.

[Phys. Rev. Lett. 119, 153001] Published Mon Oct 09, 2017

]]>We propose an information-theoretic framework to quantify multipartite correlations in classical and quantum systems, answering questions such as what is the amount of seven-partite correlations in a given state of ten particles? We identify measures of genuine multipartite correlations, i.e., stati...

[Phys. Rev. Lett. 119, 140505] Published Fri Oct 06, 2017

]]>The detection of change points is a pivotal task in statistical analysis. In the quantum realm, it is a new primitive where one aims at identifying the point where a source that supposedly prepares a sequence of particles in identical quantum states starts preparing a mutated one. We obtain the opti...

[Phys. Rev. Lett. 119, 140506] Published Fri Oct 06, 2017

]]>The first simultaneous detection of gravitational radiation by the LIGO and Virgo detectors greatly improves localization of the source and permits a novel test of general relativity.

[Phys. Rev. Lett. 119, 141101] Published Fri Oct 06, 2017

]]>We determine within lattice QCD the nucleon spin carried by valence and sea quarks and gluons. The calculation is performed using an ensemble of gauge configurations with two degenerate light quarks with mass fixed to approximately reproduce the physical pion mass. We find that the total angular mom...

[Phys. Rev. Lett. 119, 142002] Published Fri Oct 06, 2017

]]>Which density functional is the “best” for structure simulations of a particular material? A concise, first principles, approach to answer this question is presented. The random phase approximation (RPA)—an accurate many body theory—is used to evaluate various density functionals. To demonstrate and...

[Phys. Rev. Lett. 119, 145501] Published Fri Oct 06, 2017

]]>Complete sticking at low incidence energies and broad angular scattering distributions at higher energies are often observed in molecular beam experiments on gas-surface systems which feature a deep chemisorption well and lack early reaction barriers. Although CO binds strongly on Ru(0001), scatteri...

[Phys. Rev. Lett. 119, 146101] Published Fri Oct 06, 2017

]]>The ac magnetoconductance of bulk InSb at THz frequencies in high magnetic fields, as measured by the transmission of THz radiation, shows a field-induced transmission, which at high temperatures ($\approx 100\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{K}$) is well explained with classical magnetoplasma effects (helicon waves). However, at low temper...

[Phys. Rev. Lett. 119, 146603] Published Fri Oct 06, 2017

]]>Inspired by Kubo-Anderson Markov processes, we introduce a new class of transfer matrices whose largest eigenvalue is determined by a simple explicit algebraic equation. Applications include the free energy calculation for various equilibrium systems and a general criterion for perfect harmonicity, ...

[Phys. Rev. Lett. 119, 147803] Published Fri Oct 06, 2017

]]>The chemotactic motion of eukaryotic cells such as leukocytes or metastatic cancer cells relies on membrane protrusions driven by the polymerization and depolymerization of actin. Here we show that the response of the actin system to a receptor stimulus is subject to a threshold value that varies st...

[Phys. Rev. Lett. 119, 148101] Published Fri Oct 06, 2017

]]>Quantum coherence is an essential feature of quantum mechanics which is responsible for the departure between the classical and quantum world. The recently established resource theory of quantum coherence studies possible quantum technological applications of quantum coherence, and limitations that ...

[Phys. Rev. Lett. 119, 140402] Published Thu Oct 05, 2017

]]>If the electroweak sector of the standard model is described by classically conformal dynamics, the early Universe evolution can be substantially altered. It is already known that—contrarily to the standard model case—a first-order electroweak phase transition may occur. Here we show that, depending...

[Phys. Rev. Lett. 119, 141301] Published Thu Oct 05, 2017

]]>We propose a new class of tensor network state as a model for the $\mathrm{AdS}/\mathrm{CFT}$ correspondence and holography. This class is demonstrated to retain key features of the multiscale entanglement renormalization ansatz (MERA), in that they describe quantum states with algebraic correlation functions, have fre...

[Phys. Rev. Lett. 119, 141602] Published Thu Oct 05, 2017

]]>We study the effective theory of a generic class of hidden sectors where supersymmetry is broken together with an approximate $R$-symmetry at low energy. The light spectrum contains the gravitino and the pseudo-Nambu-Goldstone boson of the $R$-symmetry, the $R$-axion. We derive new model-independent const...

[Phys. Rev. Lett. 119, 141804] Published Thu Oct 05, 2017

]]>We present the first numerical computation of two-loop amplitudes based on the unitarity method. As a proof of principle, we compute the four-gluon process in the leading-color approximation. We discuss the new method, analyze its numerical properties, and apply it to reconstruct the analytic form o...

[Phys. Rev. Lett. 119, 142001] Published Thu Oct 05, 2017

]]>We convert a strongly interacting ultracold Bose gas into a mixture of atoms and molecules by sweeping the interactions from resonant to weak. By analyzing the decay dynamics of the molecular gas, we show that in addition to Feshbach dimers it contains Efimov trimers. Typically around 8% of the tota...

[Phys. Rev. Lett. 119, 143401] Published Thu Oct 05, 2017

]]>We construct a low energy effective theory of anisotropic fractional quantum Hall (FQH) states. We develop a formalism similar to that used in the bimetric approach to massive gravity, and apply it to describe Abelian anisotropic FQH states in the presence of external electromagnetic and geometric b...

[Phys. Rev. Lett. 119, 146602] Published Thu Oct 05, 2017

]]>Electric fields applied on either side of a thin, semiconducting transition-metal dichalcogenide create a superconducting layer atop a metallic layer within the material.

[Phys. Rev. Lett. 119, 147002] Published Thu Oct 05, 2017

]]>We study the frequency-dependent conductivity of nodal line semimetals (NLSMs), focusing on the effects of carrier density and energy dispersion on the nodal line. We find that the low-frequency conductivity has a rich spectral structure which can be understood using scaling rules derived from the g...

[Phys. Rev. Lett. 119, 147402] Published Thu Oct 05, 2017

]]>We introduce a method for breaking Lorentz reciprocity based upon the noncommutation of frequency conversion and delay. The method requires no magnetic materials or resonant physics, allowing for the design of scalable and broadband nonreciprocal circuits. With this approach, two types of gyrators—u...

[Phys. Rev. Lett. 119, 147703] Published Thu Oct 05, 2017

]]>We show that carbon nanotubes (CNT) can be driven through a topological phase transition using either strain or a magnetic field. This can naturally lead to Jackiw-Rebbi soliton states carrying fractionalized charges, similar to those found in a domain wall in the Su-Schrieffer-Heeger model, in a se...

[Phys. Rev. Lett. 119, 147704] Published Thu Oct 05, 2017

]]>We explore the nonequilibrium evolution and stationary states of an open many-body system that displays epidemic spreading dynamics in a classical and a quantum regime. Our study is motivated by recent experiments conducted in strongly interacting gases of highly excited Rydberg atoms where the faci...

[Phys. Rev. Lett. 119, 140401] Published Wed Oct 04, 2017

]]>We use a three-level artificial atom in the ladder configuration as a source of correlated, single microwave photons of different frequency. The artificial atom, a transmon-type superconducting circuit, is driven at the two-photon transition between ground and second-excited state, and embedded into...

[Phys. Rev. Lett. 119, 140504] Published Wed Oct 04, 2017

]]>Although the title seems self-contradictory, it does not contain a misprint. The model we study is a seemingly minor modification of the “true self-avoiding walk” model of Amit, Parisi, and Peliti in two dimensions. The walks in it are self-repelling up to a characteristic time ${T}^{*}$ (which depends on ...

[Phys. Rev. Lett. 119, 140601] Published Wed Oct 04, 2017

]]>We investigate theoretically a one-dimensional ideal Bose gas that is driven into a steady state far from equilibrium via the coupling to two heat baths: a global bath of temperature $T$ and a “hot needle,” a bath of temperature ${T}_{h}\gg T$ with localized coupling to the system. Remarkably, this system featu...

[Phys. Rev. Lett. 119, 140602] Published Wed Oct 04, 2017

]]>We solve an adaptive search model where a random walker or Lévy flight stochastically resets to previously visited sites on a $d$-dimensional lattice containing one trapping site. Because of reinforcement, a phase transition occurs when the resetting rate crosses a threshold above which nondiffusive s...

[Phys. Rev. Lett. 119, 140603] Published Wed Oct 04, 2017

]]>We derive an Itô stochastic differential equation for entropy production in nonequilibrium Langevin processes. Introducing a random-time transformation, entropy production obeys a one-dimensional drift-diffusion equation, independent of the underlying physical model. This transformation allows us to...

[Phys. Rev. Lett. 119, 140604] Published Wed Oct 04, 2017

]]>The endohedral fullerene ${}^{15}\mathrm{N}@{\mathrm{C}}_{60}$ has narrow electron paramagnetic resonance lines which have been proposed as the basis for a condensed-matter portable atomic clock. We measure the low-frequency spectrum of this molecule, identifying and characterizing a clock transition at which the frequency becom...

[Phys. Rev. Lett. 119, 140801] Published Wed Oct 04, 2017

]]>A search for charged Higgs bosons produced via vector boson fusion and decaying into $W$ and $Z$ bosons using proton-proton collisions at $\sqrt{s}=13\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{TeV}$ is presented. The data sample corresponds to an integrated luminosity of $15.2\text{\hspace{0.17em}}\text{\hspace{0.17em}}{\mathrm{fb}}^{-1}$ collected with the CMS detector in 2015 and 2016. The event selection re...

[Phys. Rev. Lett. 119, 141802] Published Wed Oct 04, 2017

]]>We derive new constraints on light vectors coupled to standard model (SM) fermions, when the corresponding SM current is broken by the chiral anomaly. The cancellation of the anomaly by heavy fermions results, in the low-energy theory, in Wess-Zumino–type interactions between the new vector and the ...

[Phys. Rev. Lett. 119, 141803] Published Wed Oct 04, 2017

]]>Single photon emitters are indispensable to photonic quantum technologies. Here, we demonstrate waveform-controlled high-purity single photons from room-temperature colloidal quantum dots. The purity of the single photons does not vary with the excitation power, thereby allowing the generation rate ...

[Phys. Rev. Lett. 119, 143601] Published Wed Oct 04, 2017

]]>We show that the coupling of quantum emitters to a two-dimensional reservoir with a simple band structure gives rise to exotic quantum dynamics with no analogue in other scenarios and which cannot be captured by standard perturbative treatments. In particular, for a single quantum emitter with its t...

[Phys. Rev. Lett. 119, 143602] Published Wed Oct 04, 2017

]]>We demonstrate the passive control of viscous flow in a channel by using an elastic arch embedded in the flow. Depending on the fluid flux, the arch may “snap” between two states—constricting and unconstricting—that differ in hydraulic conductivity by up to an order of magnitude. We use a combinatio...

[Phys. Rev. Lett. 119, 144502] Published Wed Oct 04, 2017

]]>Proximity orbital and spin-orbit effects of bilayer graphene on monolayer ${\mathrm{WSe}}_{2}$ are investigated from first principles. We find that the built-in electric field induces an orbital band gap of about 10 meV in bilayer graphene. Remarkably, the proximity spin-orbit splitting for holes is 2 orders of mag...

[Phys. Rev. Lett. 119, 146401] Published Wed Oct 04, 2017

]]>Non-Fermi liquids are metals that cannot be adiabatically deformed into free fermion states. We argue for the existence of “non-Fermi glasses,” phases of interacting disordered fermions that are fully many-body localized (MBL), yet cannot be deformed into an Anderson insulator without an eigenstate ...

[Phys. Rev. Lett. 119, 146601] Published Wed Oct 04, 2017

]]>An external off-resonant pumping is proposed as a tool to control the Dzyaloshinskii-Moriya interaction (DMI) in ferromagnetic layers with strong spin-orbit coupling. Combining theoretical analysis with numerical simulations for an $s\text{\u2212}d$-like model, we demonstrate that linearly polarized off-resonant ...

[Phys. Rev. Lett. 119, 147202] Published Wed Oct 04, 2017

]]>The recent synthesis of two-dimensional staggered materials opens up burgeoning opportunities to study optical spin-orbit interactions in semiconducting Dirac-like systems. We unveil topological phase transitions in the photonic spin Hall effect in the graphene family materials. It is shown that an ...

[Phys. Rev. Lett. 119, 147401] Published Wed Oct 04, 2017

]]>We have investigated the phase dynamics of a superconducting tunnel junction at ultralow temperatures in the presence of high damping, where the interaction with environmental degrees of freedom represents the leading energy scale. In this regime, theory predicts the dynamics to follow a generalizat...

[Phys. Rev. Lett. 119, 147702] Published Wed Oct 04, 2017

]]>Using molecular dynamics simulation of a standard coarse-grained polymer glass model, we investigate by means of the stress-fluctuation formalism the shear modulus $\mu $ as a function of temperature $T$ and sampling time $\mathrm{\Delta}t$. While the ensemble-averaged modulus $\mu (T)$ is found to decrease continuously for al...

[Phys. Rev. Lett. 119, 147802] Published Wed Oct 04, 2017

]]>Under certain conditions, two samples of fluid at different initial temperatures present a counterintuitive behavior known as the Mpemba effect: it is the hotter system that cools sooner. Here, we show that the Mpemba effect is present in granular fluids, both in uniformly heated and in freely cooli...

[Phys. Rev. Lett. 119, 148001] Published Wed Oct 04, 2017

]]>The process of pattern formation for a multispecies model anchored on a time varying network is studied. A nonhomogeneous perturbation superposed to an homogeneous stable fixed point can be amplified following the Turing mechanism of instability, solely instigated by the network dynamics. By properl...

[Phys. Rev. Lett. 119, 148301] Published Wed Oct 04, 2017

]]>