Motion measurements of a nanosized bead—held aloft in an optical trap—confirm thermodynamic theories that describe fluctuations of microscopic objects.

[Phys. Rev. Lett. 120, 080602] Published Thu Feb 22, 2018

]]>The first observation of electroweak production of same-sign $W$ boson pairs in proton-proton collisions is reported. The data sample corresponds to an integrated luminosity of $35.9\text{\hspace{0.17em}}\text{\hspace{0.17em}}\text{\hspace{0.17em}}\text{\hspace{0.17em}}{\mathrm{fb}}^{-1}$ collected at a center-of-mass energy of 13 TeV with the CMS detector at the LHC. Events are selected by requirin...

[Phys. Rev. Lett. 120, 081801] Published Thu Feb 22, 2018

]]>Optical molecular clocks promise unparalleled sensitivity to the temporal variation of the electron-to-proton mass ratio and insight into possible new physics beyond the standard model. We propose to realize a molecular clock with bosonic ${{}^{174}\mathrm{Yb}}_{2}$ molecules, where the forbidden ${{}^{1}S}_{0}\to {{}^{3}P}_{0}$ clock transitio...

[Phys. Rev. Lett. 120, 083202] Published Thu Feb 22, 2018

]]>We report spectroscopic observation of Rydberg polarons in an atomic Bose gas. Polarons are created by excitation of Rydberg atoms as impurities in a strontium Bose-Einstein condensate. They are distinguished from previously studied polarons by macroscopic occupation of bound molecular states that a...

[Phys. Rev. Lett. 120, 083401] Published Thu Feb 22, 2018

]]>In network theory, a question of prime importance is how to assess network vulnerability in a fast and reliable manner. With this issue in mind, we investigate the response to external perturbations of coupled dynamical systems on complex networks. We find that for specific, nonaveraged perturbation...

[Phys. Rev. Lett. 120, 084101] Published Thu Feb 22, 2018

]]>Cross-beam energy transfer (CBET) results from two-beam energy exchange via seeded stimulated Brillouin scattering, which detrimentally reduces ablation pressure and implosion velocity in direct-drive inertial confinement fusion. Mitigating CBET is demonstrated for the first time in inertial-confine...

[Phys. Rev. Lett. 120, 085001] Published Thu Feb 22, 2018

]]>First-order interfacial phaselike transformations that break the mirror symmetry of the symmetric $\sum 5\text{\hspace{0.17em}}(210)$ tilt grain boundary (GB) are discovered by combining a modified genetic algorithm with hybrid Monte Carlo and molecular dynamics simulations. Density functional theory calculations confirm this...

[Phys. Rev. Lett. 120, 085702] Published Thu Feb 22, 2018

]]>The visualization of the Landau levels in HgTe/CdTe quantum wells at different temperatures allows the exploration of the phase diagram as a function of magnetic field and temperature.

[Phys. Rev. Lett. 120, 086401] Published Thu Feb 22, 2018

]]>Hyperfine interaction (HFI), originating from the coupling between spins of charge carriers and nuclei, has been demonstrated to strongly influence the spin dynamics of localized charges in organic semiconductors. Nevertheless, the role of charge localization on the HFI strength in organic thin film...

[Phys. Rev. Lett. 120, 086602] Published Thu Feb 22, 2018

]]>Topological phases of fermions in two dimensions are often characterized by chiral edge states. By definition, these propagate in opposite directions at the two parallel edges when the sample geometry is that of a rectangular strip. We introduce here a model which exhibits what we call “antichiral” ...

[Phys. Rev. Lett. 120, 086603] Published Thu Feb 22, 2018

]]>We report on comprehensive results identifying the ground state of a triangular-lattice structured ${\mathrm{YbZnGaO}}_{4}$ as a spin glass, including no long-range magnetic order, prominent broad excitation continua, and the absence of magnetic thermal conductivity. More crucially, from the ultralow-temperature ac...

[Phys. Rev. Lett. 120, 087201] Published Thu Feb 22, 2018

]]>We explore the unconventional wave scattering properties of non-Hermitian systems in which amplification or damping are induced by time-periodic modulation. These non-Hermitian time-Floquet systems are capable of nonreciprocal operations in the frequency domain, which can be exploited to induce nove...

[Phys. Rev. Lett. 120, 087401] Published Thu Feb 22, 2018

]]>Electron waiting times are an important concept in the analysis of quantum transport in nanoscale conductors. Here we show that the statistics of electron waiting times can be used to characterize Cooper pair splitters that create spatially separated spin-entangled electrons. A short waiting time be...

[Phys. Rev. Lett. 120, 087701] Published Thu Feb 22, 2018

]]>We introduce a general model for a network of quantum sensors, and we use this model to consider the following question: When can entanglement between the sensors, and/or global measurements, enhance the precision with which the network can measure a set of unknown parameters? We rigorously answer t...

[Phys. Rev. Lett. 120, 080501] Published Wed Feb 21, 2018

]]>Starting over can increase the chances of reaching a desired outcome among many possibilities, as demonstrated by a new statistical analysis.

[Phys. Rev. Lett. 120, 080601] Published Wed Feb 21, 2018

]]>The interaction between nuclear spins in a molecule is exceptionally sensitive to the physics beyond the standard model. However, all present calculations of the nuclear spin-spin coupling constant $J$ are burdened by computational difficulties, which hinders the comparison to experimental results. He...

[Phys. Rev. Lett. 120, 083001] Published Wed Feb 21, 2018

]]>Atom pairs with two types of symmetries coexist in optical lattices with double well potentials. This system could be used to probe the elementary pairing of atomic states.

[Phys. Rev. Lett. 120, 083203] Published Wed Feb 21, 2018

]]>All of the $A{B}_{2}$ Laves phases discovered so far satisfy the general crystalline structure characteristic of translational symmetry; however, we report here a new structured Laves phase directly precipitated in an aged Mg-In-Ca alloy by using aberration-corrected scanning transmission electron microsco...

[Phys. Rev. Lett. 120, 085701] Published Wed Feb 21, 2018

]]>Experimental determinations of bulk band topology in the solid states have been so far restricted to only indirect investigation through the probing of surface states predicted by electronic structure calculations. We here present an alternative approach to determine the band topology by means of bu...

[Phys. Rev. Lett. 120, 086402] Published Wed Feb 21, 2018

]]>The crystal axes of an arbitrarily-shaped, exfoliated semiconductor flake are determined via resistivity measurements.

[Phys. Rev. Lett. 120, 086801] Published Wed Feb 21, 2018

]]>The impact of folds in a chromosome on its local dynamics is investigated with a model that accounts for fractal packing.

[Phys. Rev. Lett. 120, 088101] Published Wed Feb 21, 2018

]]>[Phys. Rev. Lett. 120, 089901] Published Wed Feb 21, 2018

]]>Using blue-detuned light from atomic transitions, rather than the normal red-detuned light, enables a million-fold increase in the phase-space density of a magnetooptical trap.

[Phys. Rev. Lett. 120, 083201] Published Tue Feb 20, 2018

]]>Lasers trap cold atoms in a lattice of potential barriers much narrower than the lasers’ wavelength.

[Phys. Rev. Lett. 120, 083601] Published Tue Feb 20, 2018

]]>We develop the quantum hydrodynamics of inner waves in the bulk of fractional quantum Hall states. We show that the inelastic light scattering by inner waves is a sole effect of the gravitational anomaly. We obtain the formula for the oscillator strength or mean energy of optical absorption expresse...

[Phys. Rev. Lett. 120, 086601] Published Tue Feb 20, 2018

]]>Single-file transport, arising in quasi-one-dimensional geometries where particles cannot pass each other, is characterized by the anomalous dynamics of a probe, notably its response to an external force. In these systems, the motion of several probes submitted to different external forces, although...

[Phys. Rev. Lett. 120, 070601] Published Fri Feb 16, 2018

]]>We simulate the dynamics of a disordered interacting spin chain subject to a quasiperiodic time-dependent drive, corresponding to a stroboscopic Fibonacci sequence of two distinct Hamiltonians. Exploiting the recursive drive structure, we can efficiently simulate exponentially long times. After an i...

[Phys. Rev. Lett. 120, 070602] Published Fri Feb 16, 2018

]]>We implement numerical linked cluster expansions (NLCEs) to study dynamics of lattice systems following quantum quenches, and focus on a hard-core boson model in one-dimensional lattices. We find that, in the nonintegrable regime and within the accessible times, local observables exhibit exponential...

[Phys. Rev. Lett. 120, 070603] Published Fri Feb 16, 2018

]]>We study two cases of interrelations between the enhancement of symmetries in the infrared (IR) and duality properties of supersymmetric quantum field theories in four dimensions. First, we discuss an $SU(2)$ $\mathcal{N}=1$ model with four flavors, singlet fields, and a superpotential. We show that this model fl...

[Phys. Rev. Lett. 120, 071604] Published Fri Feb 16, 2018

]]>We establish a framework for calculating the Hagedorn temperature of ${\text{AdS}}_{5}/{\mathrm{CFT}}_{4}$ via integrability. Concretely, we derive the thermodynamic Bethe ansatz equations that yield the Hagedorn temperature of planar $\mathcal{N}=4$ super Yang-Mills theory at any value of the ’t Hooft coupling. We solve these equations p...

[Phys. Rev. Lett. 120, 071605] Published Fri Feb 16, 2018

]]>The theoretical uncertainty of $(g-2{)}_{\mu}$ is currently dominated by hadronic contributions. In order to express those in terms of directly measurable quantities, we consider a sum rule relating $g-2$ to an integral of a photoabsorption cross section. The sum rule, attributed to Schwinger, can be viewed as...

[Phys. Rev. Lett. 120, 072002] Published Fri Feb 16, 2018

]]>A long-standing enigma in plasma transport has been resolved by modeling of cold-pulse experiments conducted on the Alcator C-Mod tokamak. Controlled edge cooling of fusion plasmas triggers core electron heating on time scales faster than an energy confinement time, which has long been interpreted a...

[Phys. Rev. Lett. 120, 075001] Published Fri Feb 16, 2018

]]>Preventing or minimizing ice formation in supercooled water is of prominent importance in many infrastructures, transportation, and cooling systems. The overall phase change heat transfer on icephobic surfaces, in general, is intentionally sacrificed to suppress the nucleation of water and ice. Howe...

[Phys. Rev. Lett. 120, 075902] Published Fri Feb 16, 2018

]]>Our analysis of the contact formation processes undergone by Au, Ag, and Cu nanojunctions reveals that the distance at which the two closest atoms on a pair of opposing electrodes jump into contact is, on average, 2 times longer for Au than either Ag or Cu. This suggests the existence of a longer-ra...

[Phys. Rev. Lett. 120, 076802] Published Fri Feb 16, 2018

]]>We propose a trial wave function for the quantum Hall bilayer system of total filling factor ${\nu}_{T}=1$ at a layer distance $d$ to magnetic length $\ell $ ratio $d/\ell ={\kappa}_{c1}\approx 1.1$, where the lowest charged excitation is known to have a level crossing. The wave function has two-particle correlations, which fit well with ...

[Phys. Rev. Lett. 120, 077601] Published Fri Feb 16, 2018

]]>We report on short ballistic (SB) Josephson coupling in junctions embedded in a planar heterostructure of graphene. Ballistic Josephson coupling is confirmed by the Fabry-Perot-type interference of the junction critical current ${I}_{c}$. The product of ${I}_{c}$ and the normal-state junction resistance ${R}_{N}$, norma...

[Phys. Rev. Lett. 120, 077701] Published Fri Feb 16, 2018

]]>Ultrasoft colloids typically do not spontaneously crystallize, but rather vitrify, at high concentrations. Combining *in situ* rheo–small-angle-neutron-scattering experiments and numerical simulations we show that shear facilitates crystallization of colloidal star polymers in the vicinity of their gl...

[Phys. Rev. Lett. 120, 078003] Published Fri Feb 16, 2018

]]>Results from a search for neutrinoless double-beta decay ($0\nu \beta \beta $) of ${}^{136}\mathrm{Xe}$ are presented using the first year of data taken with the upgraded EXO-200 detector. Relative to previous searches by EXO-200, the energy resolution of the detector has been improved to $\sigma /E=1.23\%$, the electric field in the drif...

[Phys. Rev. Lett. 120, 072701] Published Thu Feb 15, 2018

]]>We study the low-energy excitations of the Bose-Hubbard model in the strongly interacting superfluid phase using a Gutzwiller approach. We extract the single-particle and single-hole excitation amplitudes for each mode and report emergent mode-dependent particle-hole symmetry on specific arc-shaped ...

[Phys. Rev. Lett. 120, 073201] Published Thu Feb 15, 2018

]]>We employ attosecond angular streaking with photoelectron interferometric metrology to reveal electron sub-Coulomb-barrier dynamics. We use a weak perturbative corotating circularly polarized field (800 nm) to probe the strong-field ionization by an intense circularly polarized field (400 nm). In th...

[Phys. Rev. Lett. 120, 073202] Published Thu Feb 15, 2018

]]>Exciting the mechanical whispering-gallery mode vibrations of a microdroplet with a laser beam amplifies surface-acoustic vibrations at hypersonic frequencies.

[Phys. Rev. Lett. 120, 073902] Published Thu Feb 15, 2018

]]>Understanding jet formation from non-Newtonian fluids is important for improving the quality of various printing and dispensing techniques. Here, we use a laser-based nozzleless method to investigate impulsively formed jets of non-Newtonian fluids. Experiments with a time-resolved imaging setup demo...

[Phys. Rev. Lett. 120, 074501] Published Thu Feb 15, 2018

]]>Acoustic waves guided by the channels of a microfluidic device can precisely manipulate microscopic particles suspended in the liquid flowing through the device.

[Phys. Rev. Lett. 120, 074502] Published Thu Feb 15, 2018

]]>We report on the experimental studies of laser driven ion acceleration from a double-layer target where a near-critical density target with a few-micron thickness is coated in front of a nanometer-thin diamondlike carbon foil. A significant enhancement of proton maximum energies from 12 to $\sim 30\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{MeV}$ ...

[Phys. Rev. Lett. 120, 074801] Published Thu Feb 15, 2018

]]>Recent studies have brought $\alpha \text{\u2212}{\mathrm{RuCl}}_{3}$ to the forefront of experimental searches for materials realizing Kitaev spin-liquid physics. This material exhibits strongly anisotropic exchange interactions afforded by the spin-orbit coupling of the $4d$ Ru centers. We investigate the dynamical response at finit...

[Phys. Rev. Lett. 120, 077203] Published Thu Feb 15, 2018

]]>We show that the exciton optical selection rule in gapped chiral fermion systems is governed by their winding number $w$, a topological quantity of the Bloch bands. Specifically, in a ${C}_{N}$-invariant chiral fermion system, the angular momentum of bright exciton states is given by $w\pm 1+nN$ with $n$ being an i...

[Phys. Rev. Lett. 120, 077401] Published Thu Feb 15, 2018

]]>[Phys. Rev. Lett. 120, 079901] Published Thu Feb 15, 2018

]]>An inclusive search for the standard model Higgs boson ($H$) produced with large transverse momentum (${p}_{\mathit{T}}$) and decaying to a bottom quark-antiquark pair ($b\overline{b}$) is performed using a data set of $pp$ collisions at $\sqrt{s}=13\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{TeV}$ collected with the CMS experiment at the LHC. The data sample corresponds to an inte...

[Phys. Rev. Lett. 120, 071802] Published Wed Feb 14, 2018

]]>By coupling atoms in an optical lattice to a thin elastic membrane, researchers have demonstrated a dynamic instability that is evidence of collective atomic motion.

[Phys. Rev. Lett. 120, 073602] Published Wed Feb 14, 2018

]]>Bismuth is one of the rare materials in which second sound has been experimentally observed. Our exact calculations of thermal transport with the Boltzmann equation predict the occurrence of this Poiseuille phonon flow between $\approx 1.5$ and $\approx 3.5\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{K}$, in a sample size of 3.86 and 9.06 mm, consistent with t...

[Phys. Rev. Lett. 120, 075901] Published Wed Feb 14, 2018

]]>Realizing the potential for predictive density functional calculations of matter under extreme conditions depends crucially upon having an exchange-correlation ($XC$) free-energy functional accurate over a wide range of state conditions. Unlike the ground-state case, no such functional exists. We reme...

[Phys. Rev. Lett. 120, 076401] Published Wed Feb 14, 2018

]]>In Dirac materials linear band dispersion blocks momentum-conserving interband transitions, creating a bottleneck for electron-hole pair production and carrier multiplication in the photoexcitation cascade. Here we show that the decays are unblocked and the bottleneck is relieved by subtle many-body...

[Phys. Rev. Lett. 120, 076601] Published Wed Feb 14, 2018

]]>We report the results of a combined study of the normal-state resistivity and superconducting transition temperature ${T}_{c}$ of the unconventional superconductor ${\mathrm{Sr}}_{2}{\mathrm{RuO}}_{4}$ under uniaxial pressure. There is strong evidence that, as well as driving ${T}_{c}$ through a maximum at $\sim 3.5\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{K}$, compressive strains $\u03f5$ of ne...

[Phys. Rev. Lett. 120, 076602] Published Wed Feb 14, 2018

]]>The widely reported magnetoresistance oscillations in ${\mathrm{LaAlO}}_{3}/{\mathrm{SrTiO}}_{3}$ heterostructures have invariably been attributed to the Shubnikov–de Haas (SdH) effect, despite a pronounced inconsistency with low-field Hall resistance measurements. Here we report SdH-like resistance oscillations in quasi-1D elec...

[Phys. Rev. Lett. 120, 076801] Published Wed Feb 14, 2018

]]>Confinement of a slender body into a granular array induces stress localization in the geometrically nonlinear structure, and jamming, reordering, and vertical dislodging of the surrounding granular medium. By varying the initial packing density of grains and the length of a confined *elastica*, we id...

[Phys. Rev. Lett. 120, 078002] Published Wed Feb 14, 2018

]]>Phase separation under nonequilibrium conditions is exploited by biological cells to organize their cytoplasm but remains poorly understood as a physical phenomenon. Here, we study a ternary fluid model in which phase-separating molecules can be converted into soluble molecules, and vice versa, via ...

[Phys. Rev. Lett. 120, 078102] Published Wed Feb 14, 2018

]]>Manipulation and quantification of quantum resources are fundamental problems in quantum physics. In the asymptotic limit, coherence distillation and dilution have been proposed by manipulating infinite identical copies of states. In the nonasymptotic setting, finite data-size effects emerge, and th...

[Phys. Rev. Lett. 120, 070403] Published Tue Feb 13, 2018

]]>A model for the acoustic production of gravitational waves at a first-order phase transition is presented. The source of gravitational radiation is the sound waves generated by the explosive growth of bubbles of the stable phase. The model assumes that the sound waves are linear and that their power...

[Phys. Rev. Lett. 120, 071301] Published Tue Feb 13, 2018

]]>In the presence of a gravitational contribution to the chiral anomaly, the chiral magnetic effect induces an energy current proportional to the square of the temperature in equilibrium. In holography the thermal state corresponds to a black hole. We numerically study holographic quenches in which a ...

[Phys. Rev. Lett. 120, 071602] Published Tue Feb 13, 2018

]]>We find the conditions for the existence of fermionic zero modes of the fundamental representation in the background of a Kaluza-Klein (KK) monopole. We show that while there is no zero mode without a real mass, a normalizable zero mode appears once the real mass is sufficiently large. This provides...

[Phys. Rev. Lett. 120, 071603] Published Tue Feb 13, 2018

]]>The IceCube mission in the ice of Antarctica has measured neutrino oscillations at energies higher than any previous observation.

[Phys. Rev. Lett. 120, 071801] Published Tue Feb 13, 2018

]]>The leading-order electromagnetic and strong isospin-breaking corrections to the ratio of ${K}_{\mu 2}$ and ${\pi}_{\mu 2}$ decay rates are evaluated for the first time on the lattice, following a method recently proposed. The lattice results are obtained using the gauge ensembles produced by the European Twisted Mass Co...

[Phys. Rev. Lett. 120, 072001] Published Tue Feb 13, 2018

]]>Using the coherent elastic neutrino-nucleus scattering data of the COHERENT experiment, we determine for the first time the average neutron rms radius of ${}^{133}\mathrm{Cs}$ and ${}^{127}\mathrm{I}$. We obtain the practically model-independent value ${R}_{n}={5.5}_{-1.1}^{+0.9}\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{fm}$ using the symmetrized Fermi and Helm form factors. We also po...

[Phys. Rev. Lett. 120, 072501] Published Tue Feb 13, 2018

]]>By studying the coarsening dynamics of a one-dimensional spin-1 Bose-Hubbard model in a superfluid regime, we analytically find an unconventional universal dynamical scaling for the growth of the spin correlation length, which is characterized by the exponential integral unlike the conventional powe...

[Phys. Rev. Lett. 120, 073002] Published Tue Feb 13, 2018

]]>Non-Gaussian states, and specifically the paradigmatic cat state, are well known to be very sensitive to losses. When propagating through damping channels, these states quickly lose their nonclassical features and the associated negative oscillations of their Wigner function. However, by squeezing t...

[Phys. Rev. Lett. 120, 073603] Published Tue Feb 13, 2018

]]>Secondary flux ropes are suggested to play important roles in energy dissipation and particle acceleration during magnetic reconnection. However, their generation mechanism is not fully understood. In this Letter, we present the ﬁrst direct evidence that a secondary flux rope was generated due to th...

[Phys. Rev. Lett. 120, 075101] Published Tue Feb 13, 2018

]]>We report results of experiments with superfluid ${}^{3}\mathrm{He}$ confined in aerogels with parallel strands which lead to anisotropic scattering of ${}^{3}\mathrm{He}$ quasiparticles. We vary boundary conditions for the scattering by covering the strands with different numbers of atomic ${}^{4}\mathrm{He}$ layers and observe that the superflu...

[Phys. Rev. Lett. 120, 075301] Published Tue Feb 13, 2018

]]>Skyrmions are disklike objects that typically form triangular crystals in two-dimensional systems. This situation is analogous to the so-called pancake vortices of quasi-two-dimensional superconductors. The way in which Skyrmion disks or “pancake Skyrmions” pile up in layered centrosymmetric materia...

[Phys. Rev. Lett. 120, 077202] Published Tue Feb 13, 2018

]]>New experiments show that tensile stress vanishes shortly after preyield deformation of polymer glasses while tensile stress after postyield deformation stays high and relaxes on much longer time scales, thus hinting at a specific molecular origin of stress in ductile cold drawing: chain tension rat...

[Phys. Rev. Lett. 120, 077801] Published Tue Feb 13, 2018

]]>Molecular dynamics simulations of interacting soft disks confined in a heterogeneous quenched matrix of soft obstacles show dynamics which is fundamentally different from that of hard disks. The interactions between the disks can enhance transport when their density is increased, as disks cooperativ...

[Phys. Rev. Lett. 120, 078001] Published Tue Feb 13, 2018

]]>Quantum speed limits set an upper bound to the rate at which a quantum system can evolve. Adopting a phase-space approach, we explore quantum speed limits across the quantum-to-classical transition and identify equivalent bounds in the classical world. As a result, and contrary to common belief, we ...

[Phys. Rev. Lett. 120, 070401] Published Mon Feb 12, 2018

]]>The quantum speed limit (QSL), or the energy-time uncertainty relation, describes the fundamental maximum rate for quantum time evolution and has been regarded as being unique in quantum mechanics. In this study, we obtain a classical speed limit corresponding to the QSL using Hilbert space for the ...

[Phys. Rev. Lett. 120, 070402] Published Mon Feb 12, 2018

]]>Characterizing out-of-equilibrium many-body dynamics is a complex but crucial task for quantum applications and understanding fundamental phenomena. A central question is the role of localization in quenching thermalization in many-body systems and whether such localization survives in the presence ...

[Phys. Rev. Lett. 120, 070501] Published Mon Feb 12, 2018

]]>The quantum null energy condition (QNEC) is a conjectured relation between a null version of quantum field theory energy and derivatives of quantum field theory von Neumann entropy. In some cases, divergences cancel between these two terms and the QNEC is intrinsically finite. We study the more gene...

[Phys. Rev. Lett. 120, 071601] Published Mon Feb 12, 2018

]]>A programmable trapped-ion quantum computer performs a quantum simulation of a bosonic system.

[Phys. Rev. Lett. 120, 073001] Published Mon Feb 12, 2018

]]>Normal-mode splitting is the most evident signature of strong coupling between two interacting subsystems. It occurs when two subsystems exchange energy between themselves faster than they dissipate it to the environment. Here we experimentally show that a weakly coupled optomechanical system at roo...

[Phys. Rev. Lett. 120, 073601] Published Mon Feb 12, 2018

]]>We study theoretically the mutual information between reflected and transmitted speckle patterns produced by wave scattering from disordered media. The mutual information between the two speckle images recorded on an array of $N$ detection points (pixels) takes the form of long-range intensity correla...

[Phys. Rev. Lett. 120, 073901] Published Mon Feb 12, 2018

]]>Highly corrugated, stepped surfaces present regular 1D arrays of binding sites, creating a complex, heterogeneous environment to water. Rather than decorating the hydrophilic step sites to form 1D chains, water on stepped Cu(511) forms an extended 2D network that binds strongly to the steps but brid...

[Phys. Rev. Lett. 120, 076101] Published Mon Feb 12, 2018

]]>A functional design for the cluster-based $S$=1 Haldane state is proposed and confirmed experimentally in an edge-shared tetrahedral spin-cluster chain system.

[Phys. Rev. Lett. 120, 077201] Published Mon Feb 12, 2018

]]>Measurements and Langevin dynamics simulations of filamentous viruses driven through solid-state nanopores reveal a superlinear rise in the translocation velocity with driving force. The mobility also scales with the length of the virus in a nontrivial way that depends on the force. These dynamics a...

[Phys. Rev. Lett. 120, 078101] Published Mon Feb 12, 2018

]]>We develop the contact theory for spin-orbit-coupled Fermi gases. By using a perturbation method, we derive analytically the universal two-body behavior at short distance, which does not depend on the short-range details of interatomic potentials. We find that two new scattering parameters need to b...

[Phys. Rev. Lett. 120, 060408] Published Fri Feb 09, 2018

]]>Conventional quantum speed limits perform poorly for mixed quantum states: They are generally not tight and often significantly underestimate the fastest possible evolution speed. To remedy this, for unitary driving, we derive two quantum speed limits that outperform the traditional bounds for almos...

[Phys. Rev. Lett. 120, 060409] Published Fri Feb 09, 2018

]]>We construct an efficient Monte Carlo algorithm that overcomes the severe signal-to-noise ratio problems and helps us to accurately compute the conformal dimensions of large-$Q$ fields at the Wilson-Fisher fixed point in the $O(2)$ universality class. Using it, we verify a recent proposal that conformal...

[Phys. Rev. Lett. 120, 061603] Published Fri Feb 09, 2018

]]>We report the result of a blinded search for weakly interacting massive particles (WIMPs) using the majority of the SuperCDMS Soudan data set. With an exposure of 1690 kg d, a single candidate event is observed, consistent with expected backgrounds. This analysis (combined with previous Ge results) ...

[Phys. Rev. Lett. 120, 061802] Published Fri Feb 09, 2018

]]>A precision mass investigation of the neutron-rich titanium isotopes ${}^{51-55}\mathrm{Ti}$ was performed at TRIUMF’s Ion Trap for Atomic and Nuclear science (TITAN). The range of the measurements covers the $N=32$ shell closure, and the overall uncertainties of the ${}^{52-55}\mathrm{Ti}$ mass values were significantly reduced. Ou...

[Phys. Rev. Lett. 120, 062503] Published Fri Feb 09, 2018

]]>We implement the direct sampling of negative phase-space functions via unbalanced homodyne measurement using click-counting detectors. The negativities significantly certify nonclassical light in the high-loss regime using a small number of detectors which cannot resolve individual photons. We apply...

[Phys. Rev. Lett. 120, 063607] Published Fri Feb 09, 2018

]]>We demonstrate the generation of chiral modes–vortex flows with fixed handedness in exciton-polariton quantum fluids. The chiral modes arise in the vicinity of exceptional points (non-Hermitian spectral degeneracies) in an optically induced resonator for exciton polaritons. In particular, a vortex i...

[Phys. Rev. Lett. 120, 065301] Published Fri Feb 09, 2018

]]>We demonstrate that symmetry breaking opens a new degree of freedom to tailor energy-momentum dispersion in photonic crystals. Using a general theoretical framework in two illustrative practical structures, we show that breaking symmetry enables an on-demand tuning of the local density of states of ...

[Phys. Rev. Lett. 120, 066102] Published Fri Feb 09, 2018

]]>A key issue in heavy fermion research is how subtle changes in the hybridization between the $4f$ ($5f$) and conduction electrons can result in fundamentally different ground states. ${\mathrm{CeRhIn}}_{5}$ stands out as a particularly notable example: when replacing Rh with either Co or Ir, antiferromagnetism gives wa...

[Phys. Rev. Lett. 120, 066403] Published Fri Feb 09, 2018

]]>We study the relationship between the pseudogap and Fermi-surface topology in the two-dimensional Hubbard model by means of the cellular dynamical mean-field theory. We find two possible mean-field metallic solutions on a broad range of interactions, doping, and frustration: a conventional renormali...

[Phys. Rev. Lett. 120, 067002] Published Fri Feb 09, 2018

]]>We generalize the concept of Berry connection of the single-electron band structure to that of a two-particle Cooper pairing state between two Fermi surfaces with opposite Chern numbers. Because of underlying Fermi surface topology, the pairing Berry phase acquires nontrivial monopole structure. Con...

[Phys. Rev. Lett. 120, 067003] Published Fri Feb 09, 2018

]]>We utilize nanoscale spin valves with Pt spacer layers to characterize spin relaxation in Pt. Analysis of the spin lifetime indicates that Elliott-Yafet spin scattering is dominant at room temperature, but an unexpected intrinsic Dyakonov-Perel-like spin relaxation becomes dominant at cryogenic temp...

[Phys. Rev. Lett. 120, 067204] Published Fri Feb 09, 2018

]]>A micrometer-sized sphere trapped by optical tweezers in a liquid, under the right conditions, orbits rapidly around the laser beam—creating a potential micromixing device.

[Phys. Rev. Lett. 120, 068004] Published Fri Feb 09, 2018

]]>High-precision single-molecule experiments reveal the elastic nature of ultrashort nuclei acid duplexes, indicating that long-polymer models are valid for describing such systems.

[Phys. Rev. Lett. 120, 068102] Published Fri Feb 09, 2018

]]>The engineering of quantum systems and their environments has led to our ability now to design composite or complex systems with the properties one desires. In fact, this allows us to couple two or more distinct systems to the same environment where potentially unusual behavior and dynamics can be e...

[Phys. Rev. Lett. 120, 060403] Published Thu Feb 08, 2018

]]>The first direct measurements of the spectral functions of ultracold atoms in a disordered potential could enable future exploration of the critical regime around the Anderson transition.

[Phys. Rev. Lett. 120, 060404] Published Thu Feb 08, 2018

]]>It was recently demonstrated that bulk nuclear polarization can be obtained using nitrogen vacancy (NV) color centers in diamonds, even at ambient conditions. This is based on the optical polarization of the NV electron spin, and using several polarization transfer methods. One such method is the nu...

[Phys. Rev. Lett. 120, 060405] Published Thu Feb 08, 2018

]]>The spectral theorem of von Neumann has been widely applied in various areas, such as the characteristic spectral lines of atoms. It has been recently proposed that dynamical evolution also possesses spectral lines. As the most intrinsic property of evolution, the behavior of these spectra can, in p...

[Phys. Rev. Lett. 120, 060406] Published Thu Feb 08, 2018

]]>A quasicrystal is a class of ordered structures defying conventional classification of solid crystals and may carry classically forbidden (e.g., fivefold) rotational symmetries. In view of long-sought supersolids, a natural question is whether a superfluid can spontaneously form quasicrystalline ord...

[Phys. Rev. Lett. 120, 060407] Published Thu Feb 08, 2018

]]>Entanglement of high-dimensional quantum systems has become increasingly important for quantum communication and experimental tests of nonlocality. However, many effects of high-dimensional entanglement can be simulated by using multiple copies of low-dimensional systems. We present a general theory...

[Phys. Rev. Lett. 120, 060502] Published Thu Feb 08, 2018

]]>