Recent experiments in noninteracting ultracold atoms in three-dimensional speckle potentials have yielded conflicting results regarding the so-called mobility edge, i.e., the energy threshold separating Anderson localized from diffusive states. At the same time, there are theoretical indications tha…

[Phys. Rev. Lett. 118, 170403] Published Fri Apr 28, 2017

]]>The (${}^{10}\mathrm{Be},{}^{10}{\mathrm{B}}^{*}[1.74\text{\hspace{0.17em}\hspace{0.17em}}\mathrm{MeV}]$) charge-exchange reaction at $100\text{\hspace{0.17em}}\text{\hspace{0.17em}}A\mathrm{MeV}$ is presented as a new probe for isolating the isovector ($\mathrm{\Delta}T=1$) nonspin-transfer ($\mathrm{\Delta}S=0$) response of nuclei, with ${}^{28}\mathrm{Si}$ being the first nucleus studied. By using a secondary ${}^{10}\mathrm{Be}$ beam produced by fast fragmentation of ${}^{18}\mathrm{O}$ nuclei at the NS…

[Phys. Rev. Lett. 118, 172501] Published Fri Apr 28, 2017

]]>In previously identified forms of remote synchronization between two nodes, the intermediate portion of the network connecting the two nodes is not synchronized with them but generally exhibits some coherent dynamics. Here we report on a network phenomenon we call incoherence-mediated remote synchro…

[Phys. Rev. Lett. 118, 174102] Published Fri Apr 28, 2017

]]>We show theoretically and experimentally that the propagation of an acoustic wave in an airflow duct going through a pair of diaphragms, with equivalent amounts of mean-flow-induced effective gain and loss, displays all the features of a parity-time ($\mathcal{P}\mathcal{T}$) symmetric system. Using a scattering matrix f…

[Phys. Rev. Lett. 118, 174301] Published Fri Apr 28, 2017

]]>We herein present a first-principles formulation of the Green-Kubo method that allows the accurate assessment of the phonon thermal conductivity of solid semiconductors and insulators in equilibrium *ab initio* molecular dynamics calculations. Using the virial for the nuclei, we propose a unique *ab in…*

[Phys. Rev. Lett. 118, 175901] Published Fri Apr 28, 2017

]]>We measured, by angle-resolved photoemission spectroscopy, the electronic structure of ${\mathrm{LiCu}}_{2}{\mathrm{O}}_{2}$, a mixed-valence cuprate where planes of Cu(I) ($3{d}^{10}$) ions are sandwiched between layers containing one-dimensional edge-sharing Cu(II) ($3{d}^{9}$) chains. We find that the Cu(I)- and Cu(II)-derived electronic s…

[Phys. Rev. Lett. 118, 176404] Published Fri Apr 28, 2017

]]>The alkali-doped fullerides ${A}_{3}{\mathrm{C}}_{60}$ are half-filled three-orbital Hubbard systems which exhibit an unconventional superconducting phase next to a Mott insulator. While the pairing is understood to arise from an effectively negative Hund coupling, the highly unusual Jahn-Teller metal near the Mott tran…

[Phys. Rev. Lett. 118, 177002] Published Fri Apr 28, 2017

]]>Singlet and triplet excitations are created in the spin ladder bis-piperidinium copper tetrachloride by applying a high magnetic field.

[Phys. Rev. Lett. 118, 177202] Published Fri Apr 28, 2017

]]>Determining the nature of electronic states in doped Mott insulators remains a challenging task. In the case of tetragonal ${\mathrm{La}}_{2-x}{\mathrm{Sr}}_{x}{\mathrm{NiO}}_{4}$, the occurrence of diagonal charge and spin stripe order in the ground state is now well established. In contrast, the nature of the high-temperature “disordered” s…

[Phys. Rev. Lett. 118, 177601] Published Fri Apr 28, 2017

]]>The nuclear spin noise in a GaAs spin qubit is described by a classical spin diffusion model in both the high- and low-field regime, a result which calls for revisiting the numerical methods used to characterize these spin dynamics.

[Phys. Rev. Lett. 118, 177702] Published Fri Apr 28, 2017

]]>We consider quantum metrology with arbitrary prior knowledge of the parameter. We demonstrate that a single sensing two-level system can act as a virtual multilevel system that offers increased sensitivity in a Bayesian single-shot metrology scenario, and that allows one to estimate (arbitrary) larg…

[Phys. Rev. Lett. 118, 170801] Published Wed Apr 26, 2017

]]>Measurements of electrostatic forces on free-falling test masses–2 kg metal cubes–are carried out for the first time in an environment constructed for space-based gravitational wave detectors (a spacecraft 1.5 million km away from Earth).

[Phys. Rev. Lett. 118, 171101] Published Wed Apr 26, 2017

]]>We show that ultraperipheral heavy-ion collisions at the Large Hadron Collider (LHC) can be used to search for axionlike particles with mass below 100 GeV. The ${Z}^{4}$ enhanced photon-photon luminosity from the ions provides a large exclusive production rate, with a signature of a resonant pair of back-t…

[Phys. Rev. Lett. 118, 171801] Published Wed Apr 26, 2017

]]>Quantum systems lose coherence upon interaction with the environment and tend towards classical states. Quantum coherence is known to exponentially decay in time so that macroscopic quantum superpositions are generally unsustainable. In this work, slower than exponential decay of coherences is exper…

[Phys. Rev. Lett. 118, 174101] Published Wed Apr 26, 2017

]]>Current models predict the hose instability to crucially limit the applicability of plasma-wakefield accelerators. By developing an analytical model which incorporates the evolution of the hose instability over long propagation distances, this work demonstrates that the inherent drive-beam energy lo…

[Phys. Rev. Lett. 118, 174801] Published Wed Apr 26, 2017

]]>The de Haas–van Alphen effect describes the periodic oscillation of the magnetization in a material as a function of an inverse applied magnetic field. It forms the basis of a well established procedure for measuring Fermi surface properties, and its observation is typically taken as a direct signat…

[Phys. Rev. Lett. 118, 176801] Published Wed Apr 26, 2017

]]>We theoretically study the magnetic properties of pyrochlore iridate bilayer and trilayer thin films grown along the [111] direction using a strong coupling approach. We find the ground state magnetic configurations on a mean field level and carry out a spin-wave analysis about them. In the trilayer…

[Phys. Rev. Lett. 118, 177201] Published Wed Apr 26, 2017

]]>The morphology of an elastic strip subject to vertical compressive stress on a frictional rigid substrate is investigated by a combination of theory and experiment. We find a rich variety of morphologies, which—when the bending elasticity dominates over the effect of gravity—are classified into thre…

[Phys. Rev. Lett. 118, 178001] Published Wed Apr 26, 2017

]]>[Phys. Rev. Lett. 118, 179901] Published Wed Apr 26, 2017

]]>We experimentally study the emergence of antiferromagnetic correlations between ultracold fermionic atoms in a two-dimensional optical lattice with decreasing temperature. We determine the uniform magnetic susceptibility of the two-dimensional Hubbard model from simultaneous measurements of the *in s…*

[Phys. Rev. Lett. 118, 170401] Published Tue Apr 25, 2017

]]>Parafermions are emergent excitations that generalize Majorana fermions and can also realize topological order. In this Letter, we present a nontrivial and quasi-exactly-solvable model for a chain of parafermions in a topological phase. We compute and characterize the ground-state wave functions, wh…

[Phys. Rev. Lett. 118, 170402] Published Tue Apr 25, 2017

]]>We propose a novel method to reconstruct event by event the full kinematics of the cascade decay process, $h\to {\tau}^{+}{\tau}^{-}\to ({\pi}^{+}\overline{\nu})({\pi}^{-}\nu )$, which allows us to measure the ${\tau}^{+}{\tau}^{-}$ spin correlation, a measure of the $CP$ property of the Higgs boson. By noting that the ${\tau}^{\pm}$ momenta lie on the plane spanned by the accuratel…

[Phys. Rev. Lett. 118, 171802] Published Tue Apr 25, 2017

]]>We introduce the concept of tunable *ideal magnetic dipole scattering*, where a nonmagnetic nanoparticle scatters light as a pure magnetic dipole. High refractive index subwavelength nanoparticles usually support both electric and magnetic dipole responses. Thus, to achieve ideal magnetic dipole scatt…

[Phys. Rev. Lett. 118, 173901] Published Tue Apr 25, 2017

]]>A giant thermal magnetoresistance is predicted for the electromagnetic transport of heat in magneto-optical plasmonic structures. In chains of InSb-Ag nanoparticles at room temperature, we find that the resistance can be increased by almost a factor of 2 with magnetic fields of 2 T. We show that thi…

[Phys. Rev. Lett. 118, 173902] Published Tue Apr 25, 2017

]]>Transport barrier formation and its relation to sheared flows in fluids and plasmas are of fundamental interest in various natural and laboratory observations and of critical importance in achieving an economical energy production in a magnetic fusion device. Here we report the first observation of …

[Phys. Rev. Lett. 118, 175001] Published Tue Apr 25, 2017

]]>An *in situ* measurement at the magnetopause shows that the quadrupole pattern of the Hall magnetic field, which is commonly observed in a symmetric reconnection, is still evident in an asymmetric component reconnection, but the two quadrants adjacent to the magnetosphere are strongly compressed into …

[Phys. Rev. Lett. 118, 175101] Published Tue Apr 25, 2017

]]>We report the momentum-resolved measurement of Bloch bands in an optical Lieb lattice for a Bose-Einstein condensate (BEC). A BEC in the lattice is transported to a desired quasimomentum by applying a constant force. The energy dispersion of the lowest band is obtained by integrating measured group …

[Phys. Rev. Lett. 118, 175301] Published Tue Apr 25, 2017

]]>The magnetic and nematic properties of the iron chalcogenides have recently been the subject of intense interest. Motivated by the proposed antiferroquadrupolar and Ising-nematic orders for the bulk FeSe, we study the phase diagram of an $S=1$ generalized bilinear-biquadratic model with multineighbor …

[Phys. Rev. Lett. 118, 176401] Published Tue Apr 25, 2017

]]>The existence of closed loops of degeneracies in crystals has been intimately connected with associated crystal symmetries, raising the following question: What is the minimum symmetry required for topological character, and can one find an example? Triclinic ${\mathrm{CaAs}}_{3}$, in the space group $P\overline{1}$ with only …

[Phys. Rev. Lett. 118, 176402] Published Tue Apr 25, 2017

]]>We reformulate the projected imaginary-time evolution of the full configuration interaction quantum Monte Carlo method in terms of a Lagrangian minimization. This naturally leads to the admission of polynomial complex wave function parametrizations, circumventing the exponential scaling of the appro…

[Phys. Rev. Lett. 118, 176403] Published Tue Apr 25, 2017

]]>It has been thought that the long chiral edge channels cannot support any supercurrent between the superconducting electrodes. We show theoretically that the supercurrent can be mediated by a nonlocal interaction that facilitates a long-distance information transfer in the direction opposite of elec…

[Phys. Rev. Lett. 118, 177001] Published Tue Apr 25, 2017

]]>Researchers have transferred quantum information from one quantum dot to another dot 5 m away using photonic qubits as the relay.

[Phys. Rev. Lett. 118, 177401] Published Tue Apr 25, 2017

]]>The decay of spin-valley states is studied in a suspended carbon nanotube double quantum dot via the leakage current in Pauli blockade and via dephasing and decoherence of a qubit. From the magnetic field dependence of the leakage current, hyperfine and spin-orbit contributions to relaxation from bl…

[Phys. Rev. Lett. 118, 177701] Published Tue Apr 25, 2017

]]>We investigate the dynamic behavior of long guest rodlike particles immersed in liquid crystalline phases formed by shorter host rods, tracking both guest and host particles by fluorescence microscopy. Counterintuitively, we evidence that long rods diffuse faster than short rods forming the one-dime…

[Phys. Rev. Lett. 118, 178002] Published Tue Apr 25, 2017

]]>We discuss the properties of non-Abelian gauge theories formulated on manifolds with compactified dimensions and in the presence of fermionic fields coupled to magnetic backgrounds. We show that different phases may emerge, corresponding to different realizations of center symmetry and translational…

[Phys. Rev. Lett. 118, 172001] Published Mon Apr 24, 2017

]]>The successful laser cooling of a triatomic molecule paves the way towards the study of ultracold polyatomic molecules.

[Phys. Rev. Lett. 118, 173201] Published Mon Apr 24, 2017

]]>Experiments on intense laser driven dielectrics have revealed population transfer to the conduction band to be oscillatory in time. This is in stark contrast to ionization in semiconductors and is currently unexplained. Current ionization theories neglect coupling between the valence and conduction …

[Phys. Rev. Lett. 118, 173601] Published Mon Apr 24, 2017

]]>We prove the long-standing conjecture stating that Gaussian thermal input states minimize the output von Neumann entropy of one-mode phase-covariant quantum Gaussian channels among all the input states with a given entropy. Phase-covariant quantum Gaussian channels model the attenuation and the nois…

[Phys. Rev. Lett. 118, 160503] Published Fri Apr 21, 2017

]]>Although the Unruh effect can be rigorously considered as well tested as free quantum field theory itself, it would be nice to provide experimental evidence of its existence. This is not easy because the linear acceleration needed to reach a temperature 1 K is of order ${10}^{20}\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{m}/{\mathrm{s}}^{2}$. Here, we propose a…

[Phys. Rev. Lett. 118, 161102] Published Fri Apr 21, 2017

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

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

]]>In this Letter, we extend the tree-level Kawai-Lewellen-Tye (KLT) and Bern-Carrasco-Johansson (BCJ) amplitude relations to loop integrands of gauge theory and gravity. By rearranging the propagators of gauge and gravity loop integrands, we propose the first manifestly gauge- and diffeomorphism-invar…

[Phys. Rev. Lett. 118, 161601] Published Fri Apr 21, 2017

]]>We present new limits on exotic keV-scale physics based on 478 kg d of Majorana Demonstrator commissioning data. Constraints at the 90% confidence level are derived on bosonic dark matter (DM) and solar axion couplings, Pauli exclusion principle violating (PEPV) decay, and electron decay using monoe…

[Phys. Rev. Lett. 118, 161801] Published Fri Apr 21, 2017

]]>We present the first measurement of the two-particle transverse momentum differential correlation function, ${P}_{2}\equiv \u27e8\mathrm{\Delta}{p}_{T}\mathrm{\Delta}{p}_{T}\u27e9/\u27e8{p}_{T}{\u27e9}^{2}$, in Pb-Pb collisions at $\sqrt{{s}_{NN}}=2.76\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{TeV}$. Results for ${P}_{2}$ are reported as a function of the relative pseudorapidity ($\mathrm{\Delta}\eta $) and azimuthal angle ($\mathrm{\Delta}\phi $) between two particles for differ…

[Phys. Rev. Lett. 118, 162302] Published Fri Apr 21, 2017

]]>The exact nondipole Volkov solutions to the Schrödinger equation and Pauli equation are found, based on which a strong field theory beyond the dipole approximation is built for describing the nondipole effects in nonrelativistic laser driven electron dynamics. This theory is applied to investigate m…

[Phys. Rev. Lett. 118, 163203] Published Fri Apr 21, 2017

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

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

]]>Impacts of isotope ion mass on trapped-electron-mode (TEM)-driven turbulence and zonal flows in magnetically confined fusion plasmas are investigated. Gyrokinetic simulations of TEM-driven turbulence in three-dimensional magnetic configuration of helical plasmas with hydrogen isotope ions and real-m…

[Phys. Rev. Lett. 118, 165002] Published Fri Apr 21, 2017

]]>We investigate the elastic buckling of a triangular prism made of a soft elastomer. A face of the prism is bonded to a stiff slab that imposes an average axial compression. We observe two possible buckling modes which are localized along the free ridge. For ridge angles $\varphi $ below a critical value ${\varphi}^{\star}\approx 9\mathrm{\dots}$

[Phys. Rev. Lett. 118, 165501] Published Fri Apr 21, 2017

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

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

]]>If you mix lines and circles, what happens at the edge of the mixture? The problem is simply stated, but the answer is not obvious. Twenty years ago it was proposed that a universal topological driving force would drive cyclic chains to enrich the surface of blends of linear and cyclic chains. Here …

[Phys. Rev. Lett. 118, 167801] Published Fri Apr 21, 2017

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

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

]]>The relative modification of the prompt $\psi (2S)$ and $J/\psi $ yields from $pp$ to PbPb collisions, at the center-of-mass energy of 5.02 TeV per nucleon pair, is presented. The analysis is based on $pp$ and PbPb data samples collected by the CMS experiment at the LHC in 2015, corresponding to integrated luminosi…

[Phys. Rev. Lett. 118, 162301] Published Thu Apr 20, 2017

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

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

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

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

]]>We report a novel crossover behavior in the long-range-ordered phase of a prototypical spin-$1/2$ Heisenberg antiferromagnetic ladder compound ${(\mathrm{C}}_{7}{\mathrm{H}}_{10}\mathrm{N}{)}_{2}{\mathrm{CuBr}}_{4}$. The staggered order was previously evidenced from a continuous and symmetric splitting of ${}^{14}\mathrm{N}$ NMR spectral lines on lowering the temperature be…

[Phys. Rev. Lett. 118, 167206] Published Thu Apr 20, 2017

]]>Hole transport experiments were performed on a gated double quantum dot device defined in a $p$-$\mathrm{GaAs}/\mathrm{AlGaAs}$ heterostructure with a single hole occupancy in each dot. The charging diagram of the device was mapped out using charge detection confirming that the single hole limit is reached. In that limit…

[Phys. Rev. Lett. 118, 167701] Published Thu Apr 20, 2017

]]>It is widely believed that one major life-threatening transition to chaotic fibrillation occurs via spiral-wave breakup that is preceded by spatiotemporal dispersion of refractoriness due to alternations in the duration of the cardiac action potential (AP). However, recent clinical and experimental …

[Phys. Rev. Lett. 118, 168101] Published Thu Apr 20, 2017

]]>[Phys. Rev. Lett. 118, 169905] Published Thu Apr 20, 2017

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

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

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

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

]]>Radiative transition probabilities ($A$ values) are computed for the Fe xvii $L$-shell lines in a Breit-Pauli configuration-interaction method with the autostructure atomic structure code. It is shown that, by carefully taking into account the fine-tuning of the relativistic coupling and $2p$-orbital rela…

[Phys. Rev. Lett. 118, 163002] Published Tue Apr 18, 2017

]]>We report on a new effect caused by the electron-phonon coupling in a stoichiometric rare-earth antiferromagnetic crystal subjected to an external magnetic field, namely, the appearance of a nonzero gap in the spectrum of electronic excitations in an arbitrarily small field. The effect was registere…

[Phys. Rev. Lett. 118, 167203] Published Tue Apr 18, 2017

]]>[Phys. Rev. Lett. 118, 169904] Published Tue Apr 18, 2017

]]>Atom interferometry tests of universality of free fall based on the differential measurement of two different atomic species provide a useful complement to those based on macroscopic masses. However, when striving for the highest possible sensitivities, gravity gradients pose a serious challenge. In…

[Phys. Rev. Lett. 118, 160401] Published Mon Apr 17, 2017

]]>The transfer of quantum information between physical systems of a different nature is a central matter in quantum technologies. Particularly challenging is the transfer between discrete and continuous degrees of freedom of various harmonic oscillator systems. Here we implement a protocol for telepor…

[Phys. Rev. Lett. 118, 160501] Published Mon Apr 17, 2017

]]>We investigate the ability of a quantum measurement device to discriminate two states or, generically, two hypotheses. In full generality, the measurement can be performed a number $n$ of times, and arbitrary preprocessing of the states and postprocessing of the obtained data are allowed. There is an …

[Phys. Rev. Lett. 118, 160502] Published Mon Apr 17, 2017

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

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

]]>We measure the gravitational lensing shear signal around dark matter halos hosting constant mass galaxies using light sources at $z\sim 1$ (background galaxies) and at the surface of last scattering at $z\sim 1100$ (the cosmic microwave background). The galaxy shear measurement uses data from the CFHTLenS surve…

[Phys. Rev. Lett. 118, 161301] Published Mon Apr 17, 2017

]]>Prompt $\gamma $-ray spectroscopy of the neutron-rich ${}^{96}\mathrm{Kr}$, produced in transfer- and fusion-induced fission reactions, has been performed using the combination of the Advanced Gamma Tracking Array and the $\mathrm{VAMOS}++$ spectrometer. A second excited state, assigned to ${J}^{\pi}={4}^{+}$, is observed for the first time, and a…

[Phys. Rev. Lett. 118, 162501] Published Mon Apr 17, 2017

]]>The helium atom is the simplest many-body electronic system provided by nature. The exact solution to the Schrödinger equation is known for helium ground and excited states, and it represents a benchmark for any many-body methodology. Here, we check the *ab initio* many-body $GW$ approximation and the B…

[Phys. Rev. Lett. 118, 163001] Published Mon Apr 17, 2017

]]>The transmission of a wave through a randomly chosen “pile of plates” typically decreases exponentially with the number of plates, a phenomenon closely related to Anderson localization. In apparent contradiction, we construct disordered planar permittivity profiles which are complex valued (i.e., ha…

[Phys. Rev. Lett. 118, 163201] Published Mon Apr 17, 2017

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

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

]]>Multichannel Efimov physics is investigated in ultracold heteronuclear admixtures of K and Rb atoms. We observe a shift in the scattering length where the first atom-dimer resonance appears in the ${}^{41}\mathrm{K}\text{\u2212}{}^{87}\mathrm{Rb}$ system relative to the position of the previously observed atom-dimer resonance in the ${}^{40}\mathrm{K}\text{\u2212}{}^{\mathrm{8\dots}}\mathrm{Rb}$

[Phys. Rev. Lett. 118, 163401] Published Mon Apr 17, 2017

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

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

]]>We demonstrate an up to now unrecognized and very effective mechanism which prevents filament collapse and allows persistent self-guiding propagation retaining a large portion of the optical energy on axis over unexpected long distances. The key ingredient is the possibility of continuously leaking …

[Phys. Rev. Lett. 118, 163901] Published Mon Apr 17, 2017

]]>While a wealth of results has been obtained for chaos in single-particle quantum systems, much less is known about chaos in quantum many-body systems. We contribute to recent efforts to make a semiclassical analysis of such systems feasible, which is nontrivial due to the exponential proliferation o…

[Phys. Rev. Lett. 118, 164101] Published Mon Apr 17, 2017

]]>Inviscid invariants of flow equations are crucial in determining the direction of the turbulent energy cascade. In this work we investigate a variant of the three-dimensional Navier-Stokes equations that shares exactly the same ideal invariants (energy and helicity) and the same symmetries (under ro…

[Phys. Rev. Lett. 118, 164501] Published Mon Apr 17, 2017

]]>It is proposed to replace the traditional counterpropagating laser seed in backward Raman amplifiers with a plasma wave seed. In the linear regime, namely, for a constant pump amplitude, a plasma wave seed may be found by construction that strictly produces the same output pulse as does a counterpro…

[Phys. Rev. Lett. 118, 164801] Published Mon Apr 17, 2017

]]>The generation of intense electron beams with low emittance is key to both the production of coherent x rays from free electron lasers, and electron pulses with large transverse coherence length used in ultrafast electron diffraction. These beams are generated today by photoemission from disordered …

[Phys. Rev. Lett. 118, 164802] Published Mon Apr 17, 2017

]]>The kinetics of the separation between low and high density phases in a single component Lennard-Jones model is studied via molecular dynamics simulations, at very low temperatures, in the space dimension $d=2$. For densities close to the vapor branch of the coexistence curve, disconnected nanoscale c…

[Phys. Rev. Lett. 118, 165701] Published Mon Apr 17, 2017

]]>We study the pairing symmetry of the interlayer paired state of composite fermions in quantum Hall bilayers. Based on the Halperin-Lee-Read (HLR) theory, the effect of the long-range Coulomb interaction and the internal Chern-Simons gauge fluctuation is analyzed with the random-phase approximation b…

[Phys. Rev. Lett. 118, 166401] Published Mon Apr 17, 2017

]]>We study the Anderson transition on a generic model of random graphs with a tunable branching parameter $1<K<2$, through large scale numerical simulations and finite-size scaling analysis. We find that a single transition separates a localized phase from an unusual delocalized phase that is ergo…

[Phys. Rev. Lett. 118, 166801] Published Mon Apr 17, 2017

]]>Supersymmetric (SUSY) gauge theories such as the minimal supersymmetric standard model play a fundamental role in modern particle physics, but have not been verified so far in nature. Here, we show that a SUSY gauge theory with dynamical gauge bosons and fermionic gauginos emerges naturally at the p…

[Phys. Rev. Lett. 118, 166802] Published Mon Apr 17, 2017

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

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

]]>Scanning tunneling microscopy has been shown to be a powerful experimental probe to detect electronic excitations and further allows us to deduce fingerprints of bosonic collective modes in superconductors. Here, we demonstrate that the inclusion of inelastic tunnel events is crucial for the interpr…

[Phys. Rev. Lett. 118, 167001] Published Mon Apr 17, 2017

]]>We investigate the superconducting-gap anisotropy in one of the recently discovered ${\mathrm{BiS}}_{2}$-based superconductors, ${\mathrm{NdO}}_{0.71}{\mathrm{F}}_{0.29}{\mathrm{BiS}}_{2}$ (${T}_{c}\sim 5\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{K}$), using laser-based angle-resolved photoemission spectroscopy. Whereas the previously discovered high-${T}_{c}$ superconductors such as copper oxides and iron-based supe…

[Phys. Rev. Lett. 118, 167002] Published Mon Apr 17, 2017

]]>Hund’s coupling is shown to generally favor, in a doped half-filled Mott insulator, an increase in the compressibility culminating in a Fermi-liquid instability towards phase separation. The largest effect is found near the frontier between an ordinary and an orbitally decoupled (“Hund’s”) metal. Th…

[Phys. Rev. Lett. 118, 167003] Published Mon Apr 17, 2017

]]>While current-induced spin-orbit torques have been extensively studied in ferromagnets and antiferromagnets, ferrimagnets have been less studied. Here we report the presence of enhanced spin-orbit torques resulting from negative exchange interaction in ferrimagnets. The effective field and switching…

[Phys. Rev. Lett. 118, 167201] Published Mon Apr 17, 2017

]]>We present a general method to construct translation-invariant and SU(2) symmetric antiferromagnetic parent Hamiltonians of valence bond crystals (VBCs). The method is based on a canonical mapping transforming $S=1/2$ spin operators into a bilinear form of a new set of *dimer fermion* operators. We cons…

[Phys. Rev. Lett. 118, 167202] Published Mon Apr 17, 2017

]]>A purely artificial mechanism for optical nonlinearity is proposed based on a metamaterial route. The mechanism is derived from classical electromagnetic interaction in a metamolecule consisting of a cut-wire meta-atom nested within a split-ring meta-atom. Induced by the localized magnetic field in …

[Phys. Rev. Lett. 118, 167401] Published Mon Apr 17, 2017

]]>Collective phenomena emerge from the interaction of natural or artificial units with a complex organization. The interplay between structural patterns and dynamics might induce functional clusters that, in general, are different from topological ones. In biological systems, like the human brain, the…

[Phys. Rev. Lett. 118, 168301] Published Mon Apr 17, 2017

]]>We investigate the ordering dynamics of the voter model with time-delayed interactions. The dynamical process in the $d$-dimensional lattice is shown to be equivalent to the first passage problem of a random walker in the ($d+1$)-dimensional strip of a finite width determined by the delay time. The equi…

[Phys. Rev. Lett. 118, 168302] Published Mon Apr 17, 2017

]]>[Phys. Rev. Lett. 118, 169901] Published Mon Apr 17, 2017

]]>[Phys. Rev. Lett. 118, 169902] Published Mon Apr 17, 2017

]]>[Phys. Rev. Lett. 118, 169903] Published Mon Apr 17, 2017

]]>The merger rate of black hole binaries inferred from the detections in the first Advanced LIGO science run implies that a stochastic background produced by a cosmological population of mergers will likely mask the primordial gravitational wave background. Here we demonstrate that the next generation…

[Phys. Rev. Lett. 118, 151105] Published Fri Apr 14, 2017

]]>We triply ionize the van der Waals bound carbon monoxide dimer with intense ultrashort pulses and study the breakup channel $(\mathrm{CO}{)}_{2}^{3+}\to {\mathrm{C}}^{+}+{\mathrm{O}}^{+}+{\mathrm{CO}}^{+}$. The fragments are recorded in a cold target recoil ion momentum spectrometer. We observe a fast ${\mathrm{CO}}^{2+}$ dissociation channel in the dimer, which does not exist …

[Phys. Rev. Lett. 118, 153001] Published Fri Apr 14, 2017

]]>Asymmetric structures support different field distributions and electromagnetic responses when excited from different directions. Here we show that time-reversal symmetry imposes fundamental constraints on their overall response, beyond those dictated by reciprocity. For two-port devices, the asymme…

[Phys. Rev. Lett. 118, 154302] Published Fri Apr 14, 2017

]]>The interaction of charged particles and photons with intense electromagnetic fields gives rise to multiphoton Compton and Breit-Wheeler processes. These are usually described in the framework of the external field approximation, where the electromagnetic field is assumed to have infinite energy. Ho…

[Phys. Rev. Lett. 118, 154803] Published Fri Apr 14, 2017

]]>In small-scale metallic systems, collective dislocation activity has been correlated with size effects in strength and with a steplike plastic response under uniaxial compression and tension. Yielding and plastic flow in these samples is often accompanied by the emergence of multiple dislocation ava…

[Phys. Rev. Lett. 118, 155501] Published Fri Apr 14, 2017

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

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

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