We propose and study a conformal field theory (CFT) model with random position-dependent velocity that, as we argue, naturally emerges as an effective description of heat transport in one-dimensional quantum many-body systems with certain static random impurities. We present exact analytical results...

[Phys. Rev. Lett. 122, 020201] Published Fri Jan 18, 2019

]]>Classical phase space flow is inviscid. Here we show that in quantum phase space Wigner’s probability current $\mathbf{J}$ can be effectively viscous. This results in shear suppression in quantum phase space dynamics which enforces Zurek’s limit for the minimum size scale of spotty structures that develop dyna...

[Phys. Rev. Lett. 122, 020401] Published Fri Jan 18, 2019

]]>The capability to generate and manipulate quantum states in high-dimensional Hilbert spaces is a crucial step for the development of quantum technologies, from quantum communication to quantum computation. One-dimensional quantum walk dynamics represents a valid tool in the task of engineering arbit...

[Phys. Rev. Lett. 122, 020503] Published Fri Jan 18, 2019

]]>Recovering an unknown Hamiltonian from measurements is an increasingly important task for certification of noisy quantum devices and simulators. Recent works have succeeded in recovering the Hamiltonian of an isolated quantum system with local interactions from long-ranged correlators of a single ei...

[Phys. Rev. Lett. 122, 020504] Published Fri Jan 18, 2019

]]>The Spin Asymmetries of the Nucleon Experiment measured two double spin asymmetries using a polarized proton target and polarized electron beam at two beam energies, 4.7 and 5.9 GeV. A large-acceptance open-configuration detector package identified scattered electrons at 40° and covered a wide range...

[Phys. Rev. Lett. 122, 022002] Published Fri Jan 18, 2019

]]>We provide a new value for the ratio $R=\mathrm{\Gamma}\mathbf{(}{\pi}^{0}\to {e}^{+}{e}^{-}\gamma (\gamma )\mathbf{)}/\mathrm{\Gamma}({\pi}^{0}\to \gamma \gamma )=11.978(6)\times {10}^{-3}$, which is by 2 orders of magnitude more precise than the current Particle Data Group average. It is obtained using the complete set of the next-to-leading-order radiative corrections in the QED sector, and incorporates up-...

[Phys. Rev. Lett. 122, 022003] Published Fri Jan 18, 2019

]]>Usually, the transport of information requires either an electromagnetic field or matter as a carrier. It turns out that the Dirac vacuum modes could be exploited as a potentially loss-free carrier of information between two distant locations in space. At the first location, a spatially localized el...

[Phys. Rev. Lett. 122, 023603] Published Fri Jan 18, 2019

]]>For three-dimensional tangle laser solitons that have a number of unclosed and closed vortex lines and coexist in a range of the scheme parameters, we predict irreversible hysteretic transformation of their internal structure when a system parameter slowly and regularly varies crossing the boundary ...

[Phys. Rev. Lett. 122, 023903] Published Fri Jan 18, 2019

]]>A microscopic understanding of crystal-melt interfaces, inseparably involved in the dynamics of crystallization, is a long-standing challenge in condensed matter physics. Here, using an advanced optical microscopy, we directly visualize growing interfaces between ice basal faces and quasiliquid laye...

[Phys. Rev. Lett. 122, 026102] Published Fri Jan 18, 2019

]]>We show that the recently observed superconductivity in twisted bilayer graphene (TBG) can be explained as a consequence of the Kohn-Luttinger (KL) instability which leads to an effective attraction between electrons with originally repulsive interaction. Usually, the KL instability takes place at e...

[Phys. Rev. Lett. 122, 026801] Published Fri Jan 18, 2019

]]>Graphene shows a many-body phase arising from competition between an electron solid and the fractional quantum Hall effect.

[Phys. Rev. Lett. 122, 026802] Published Fri Jan 18, 2019

]]>A heat-assisted route for subnanosecond magnetic recording is discovered for the dielectric bismuth-substituted yttrium iron garnet, known for possessing small magnetic damping. The experiments and simulations reveal that the route involves nonlinear magnetization precession, triggered by a transien...

[Phys. Rev. Lett. 122, 027202] Published Fri Jan 18, 2019

]]>Plasmonic metamaterials and metasurfaces offer new opportunities in developing high performance terahertz emitters and detectors beyond the limitations of conventional nonlinear materials. However, simple meta-atoms for second-order nonlinear applications encounter fundamental trade-offs in the nece...

[Phys. Rev. Lett. 122, 027401] Published Fri Jan 18, 2019

]]>Multiple exponential relaxation channels in a glass-forming supercooled liquid give rise to non-exponential behavior in a local order parameter associated with “softness.”

[Phys. Rev. Lett. 122, 028001] Published Fri Jan 18, 2019

]]>Even though the persistence length ${L}_{P}$ of double-stranded DNA plays a pivotal role in cell biology and nanotechnologies, its dependence on ionic strength $I$ lacks a consensual description. Using a high-throughput single-molecule technique and statistical physics modeling, we measure ${L}_{P}$ in the presence...

[Phys. Rev. Lett. 122, 028102] Published Fri Jan 18, 2019

]]>Signaled by nonanalyticities in the time evolution of physical observables, dynamic quantum phase transitions (DQPTs) emerge in quench dynamics of topological systems and possess an interesting geometric origin captured by dynamic topological order parameters (DTOPs). In this Letter, we report the e...

[Phys. Rev. Lett. 122, 020501] Published Wed Jan 16, 2019

]]>A new algorithm for quantum state preparation uses fewer gates than existing ones, by two orders of magnitude.

[Phys. Rev. Lett. 122, 020502] Published Wed Jan 16, 2019

]]>We investigate how information spreads in three paradigmatic one-dimensional models with spatial disorder. The models we consider are unitarily related to a system of free fermions and, thus, are manifestly integrable. We demonstrate that out-of-time-order correlators can spread slowly beyond the si...

[Phys. Rev. Lett. 122, 020603] Published Wed Jan 16, 2019

]]>We present the observation of peculiar nonmonotonic photon energy dependencies of the count rates and of the rocking curves of parametric down-conversion of x rays into ultraviolet far from any atomic resonances. The observations cannot be explained by models that consider only atomic or bond charge...

[Phys. Rev. Lett. 122, 023902] Published Wed Jan 16, 2019

]]>In flat space, changing a system’s velocity requires the presence of an external force. However, an isolated nonrigid system can freely change its orientation due to the nonholonomic nature of the angular momentum conservation law. Such nonrigid isolated systems may thus manifest their internal dyna...

[Phys. Rev. Lett. 122, 024102] Published Wed Jan 16, 2019

]]>We report on a chiral optical Stern-Gerlach experiment where chiral liquid crystal microspheres are selectively displaced by means of optical forces arising from optical helicity gradients. The present Newtonian experimental demonstration of an effect predicted at molecular scale [New J. Phys. **16**, 0...

[Phys. Rev. Lett. 122, 024301] Published Wed Jan 16, 2019

]]>Whirling fruits have evolved wing-like structures that are optimized to generate maximum lift, according to a new study.

[Phys. Rev. Lett. 122, 024501] Published Wed Jan 16, 2019

]]>Time-domain interferometry (TDI) is a promising method to characterize spatial and temporal correlations at x-ray energies, via the so-called intermediate scattering function and the related dynamical couple correlations. However, so far, it has only been analyzed for classical target systems. Here,...

[Phys. Rev. Lett. 122, 025301] Published Wed Jan 16, 2019

]]>We address the problem of resistivity saturation observed in materials such as the $A$-15 compounds. To do so, we calculate the resistivity for the Hubbard-Holstein model in infinite spatial dimensions to second order in on-site repulsion $U\le D$ and to first order in (dimensionless) electron-phonon coupl...

[Phys. Rev. Lett. 122, 026602] Published Wed Jan 16, 2019

]]>We use the functional renormalization group method to study a three-orbital model for superconducting ${\mathrm{Sr}}_{2}{\mathrm{RuO}}_{4}$. Although the pairing symmetry is found to be a chiral $p$ wave, the atomic spin-orbit coupling induces near nodes for quasiparticle excitations. Our theory explains a major experimental puzzl...

[Phys. Rev. Lett. 122, 027002] Published Wed Jan 16, 2019

]]>Overdoped high-temperature cuprate superconductors have often been understood within the standard BCS framework of superconductivity. However, measurements in a variety of overdoped cuprates indicate that the superfluid density is much smaller than expected from BCS theory and decreases smoothly to ...

[Phys. Rev. Lett. 122, 027003] Published Wed Jan 16, 2019

]]>Stereociliary imprints in the tectorial membrane (TM) have been taken as evidence that outer hair cells are sensitive to shearing displacements of the TM, which plays a key role in shaping cochlear sensitivity and frequency selectivity via resonance and traveling wave mechanisms. However, the TM is ...

[Phys. Rev. Lett. 122, 028101] Published Wed Jan 16, 2019

]]>We study the problem of preparing a quantum many-body system from an initial to a target state by optimizing the fidelity over the family of bang-bang protocols. We present compelling numerical evidence for a universal spin-glasslike transition controlled by the protocol time duration. The glassy cr...

[Phys. Rev. Lett. 122, 020601] Published Tue Jan 15, 2019

]]>First passage under restart with branching is proposed as a generalization of first passage under restart. Strong motivation to study this generalization comes from the observation that restart with branching can expedite the completion of processes that cannot be expedited with simple restart; yet ...

[Phys. Rev. Lett. 122, 020602] Published Tue Jan 15, 2019

]]>A search for the rare decay ${K}_{L}\to {\pi}^{0}\nu \overline{\nu}$ was performed. With the data collected in 2015, corresponding to $2.2\times {10}^{19}$ protons on target, a single event sensitivity of $(1.30\pm 0.0{1}_{\mathrm{stat}}\pm 0.1{4}_{\mathrm{syst}})\times {10}^{-9}$ was achieved and no candidate events were observed. We set an upper limit of $3.0\times {10}^{-9}$ for the branching fracti...

[Phys. Rev. Lett. 122, 021802] Published Tue Jan 15, 2019

]]>We present an exploratory lattice QCD calculation of the neutrinoless double beta decay $\pi \pi \to ee$. Under the mechanism of light-neutrino exchange, the decay amplitude involves significant long-distance contributions. The calculation reported here, with pion masses ${m}_{\pi}=420$ and 140 MeV, demonstrates that t...

[Phys. Rev. Lett. 122, 022001] Published Tue Jan 15, 2019

]]>We show numerically that under certain conditions noise-induced soliton self-mode conversion dominates over soliton self-frequency shift for a soliton in a high order spatial mode of a multimode optical fiber. The input soliton has to be group index matched to a lower order mode for a frequency sepa...

[Phys. Rev. Lett. 122, 023901] Published Tue Jan 15, 2019

]]>The exponential growth of the out-of-time-ordered correlator (OTOC) has been proposed as a quantum signature of classical chaos. The growth rate is expected to coincide with the classical Lyapunov exponent. This quantum-classical correspondence has been corroborated for the kicked rotor and the stad...

[Phys. Rev. Lett. 122, 024101] Published Tue Jan 15, 2019

]]>Recently, a zero Hall conductance plateau with random domains was experimentally observed in the quantum anomalous Hall (QAH) effect. We study the effects of random domains on the zero Hall plateau in QAH insulators. We find that the structure inversion symmetry determines the scaling property of th...

[Phys. Rev. Lett. 122, 026601] Published Tue Jan 15, 2019

]]>We show that the coupling of homogeneous Heisenberg spin-$1/2$ ladders in different phases leads to the formation of interfacial zero energy Majorana bound states. Unlike Majorana bound states at the interfaces of topological quantum wires, these states are void of topological protection and generally...

[Phys. Rev. Lett. 122, 027201] Published Tue Jan 15, 2019

]]>[Phys. Rev. Lett. 122, 029901] Published Tue Jan 15, 2019

]]>A search for the Higgs boson decaying to two oppositely charged muons is presented using data recorded by the CMS experiment at the CERN LHC in 2016 at a center-of-mass energy $\sqrt{s}=13\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{TeV}$, corresponding to an integrated luminosity of $35.9\text{\hspace{0.17em}}\text{\hspace{0.17em}}{\mathrm{fb}}^{-1}$. Data are found to be compatible with the predicted backg...

[Phys. Rev. Lett. 122, 021801] Published Mon Jan 14, 2019

]]>Topological effects were observed for the first time in an ensemble of atoms at room temperature.

[Phys. Rev. Lett. 122, 023601] Published Mon Jan 14, 2019

]]>Recent observation of quantum emitters in monolayers of hexagonal boron nitride (h-BN) has provided a novel platform for optomechanical experiments where the single-photon emitters can couple to the motion of a freely suspended h-BN membrane. Here, we propose a scheme where the electronic degree of ...

[Phys. Rev. Lett. 122, 023602] Published Mon Jan 14, 2019

]]>A new relativistic vortex cutter driven by the Laguerre-Gaussian (LG) mode is carried out for the first time in three-dimensional particle-in-cell simulations. Studies show that the electric fields periodically concentrate and emanate within every laser wavelength for the reflected circularly polari...

[Phys. Rev. Lett. 122, 024801] Published Mon Jan 14, 2019

]]>The propagation of fast electron currents in near solid-density media was investigated via proton probing. Fast currents were generated inside dielectric foams via irradiation with a short ($\sim 0.6\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{ps}$) laser pulse focused at relativistic intensities ($I{\lambda}^{2}\sim 4\times {10}^{19}\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{W}\text{\hspace{0.17em}}{\mathrm{cm}}^{-2}\text{\hspace{0.17em}}\mu {\mathrm{m}}^{2}$). Proton probing provided a ...

[Phys. Rev. Lett. 122, 025001] Published Mon Jan 14, 2019

]]>Despite the importance of porous two-dimensional (2D) molecules and materials in advanced technological applications, the question of how the void space in these systems affects the van der Waals (vdW) scaling landscape has been largely unanswered. Analytical and numerical models presented herein de...

[Phys. Rev. Lett. 122, 026001] Published Mon Jan 14, 2019

]]>Material properties depend sensitively on the atomic arrangements and atomic bonding, but these are notoriously difficult to measure in nanosized atomic clusters due to the small size of the objects and the challenge of obtaining bulk samples of identical clusters. Here, we have combined the recent ...

[Phys. Rev. Lett. 122, 026101] Published Mon Jan 14, 2019

]]>Two independent studies report superconductivity at record high temperatures in hydrogen-rich materials under extreme pressure.

[Phys. Rev. Lett. 122, 027001] Published Mon Jan 14, 2019

]]>A key computational resource to prepare a quantum system in a target state, an important subroutine of quantum information protocols, is identified and quantified.

[Phys. Rev. Lett. 122, 010505] Published Fri Jan 11, 2019

]]>In recent years experiments revealed intriguing hints for new physics (NP) in $B$ decays involving $b\to c\tau \nu $ and $b\to s{\ell}^{+}{\ell}^{-}$ transitions at the $4\sigma $ and $5\sigma $ level, respectively. In addition, there are slight disagreements in $b\to u\tau \nu $ and $b\to d{\mu}^{+}{\mu}^{-}$ observables. While not significant on their own, they point in the sam...

[Phys. Rev. Lett. 122, 011805] Published Fri Jan 11, 2019

]]>The first observation of two structures consistent with resonances in the final states ${\mathrm{\Lambda}}_{b}^{0}{\pi}^{-}$ and ${\mathrm{\Lambda}}_{b}^{0}{\pi}^{+}$ is reported using samples of $pp$ collision data collected by the LHCb experiment at $\sqrt{s}=7$ and 8 TeV, corresponding to an integrated luminosity of $3\text{\hspace{0.17em}}\text{\hspace{0.17em}}{\mathrm{fb}}^{-1}$. The ground states ${\mathrm{\Sigma}}_{b}^{\pm}$ and ${\mathrm{\Sigma}}_{b}^{*\pm}$ are also confi...

[Phys. Rev. Lett. 122, 012001] Published Fri Jan 11, 2019

]]>Two-dimensional topological insulators possess conducting edge states at their boundary while being insulating in the bulk. We investigate the edge state emergent at a smooth topological phase boundary of interacting fermions within a full real-space analysis of the time-reversal invariant Hofstadte...

[Phys. Rev. Lett. 122, 010406] Published Thu Jan 10, 2019

]]>We develop energy efficient, continuous microwave schemes to couple electron and nuclear spins, using phase or amplitude modulation to bridge their frequency difference. These controls have promising applications in biological systems, where microwave power should be limited, as well as in situation...

[Phys. Rev. Lett. 122, 010407] Published Thu Jan 10, 2019

]]>Dynamical decoupling (DD) is an active and effective method for suppressing decoherence of a quantum system from its environment. In contrast to the nominal biaxial DD, this work presents a uniaxial decoupling protocol that requires a significantly reduced number of pulses and a much lower bias fiel...

[Phys. Rev. Lett. 122, 010408] Published Thu Jan 10, 2019

]]>We characterize a fluxonium qubit consisting of a Josephson junction inductively shunted with a NbTiN nanowire superinductance. We explain the measured energy spectrum by means of a multimode theory accounting for the distributed nature of the superinductance and the effect of the circuit nonlineari...

[Phys. Rev. Lett. 122, 010504] Published Thu Jan 10, 2019

]]>We present accurate fits for the remnant properties of generically precessing binary black holes, trained on large banks of numerical-relativity simulations. We use Gaussian process regression to interpolate the remnant mass, spin, and recoil velocity in the seven-dimensional parameter space of prec...

[Phys. Rev. Lett. 122, 011101] Published Thu Jan 10, 2019

]]>Precision measurements of the inverse-square law via experiments on short-range gravity provide sensitive tests of Lorentz symmetry. A combined analysis of data from experiments at the Huazhong University of Science and Technology and Indiana University sets simultaneous limits on all 22 coefficient...

[Phys. Rev. Lett. 122, 011102] Published Thu Jan 10, 2019

]]>We study the backreaction of superhorizon fluctuations of a light quantum scalar field on a classical de Sitter geometry by means of the Wilsonian renormalization group. This allows us to treat the gravitationally amplified fluctuations in a nonperturbative manner and to analytically follow the indu...

[Phys. Rev. Lett. 122, 011302] Published Thu Jan 10, 2019

]]>We study the quantum mechanics of three-index Majorana fermions ${\psi}^{abc}$ governed by a quartic Hamiltonian with $\mathrm{O}(N{)}^{3}$ symmetry. Similarly to the Sachdev-Ye-Kitaev model, this tensor model has a solvable large-$N$ limit dominated by the melonic diagrams. For $N=4$ the total number of states is ${2}^{32}$, but they ...

[Phys. Rev. Lett. 122, 011601] Published Thu Jan 10, 2019

]]>A search is performed for dark matter particles produced in association with a top quark pair in proton-proton collisions at $\sqrt{s}=13\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{TeV}$. The data correspond to an integrated luminosity of $35.9\text{\hspace{0.17em}}\text{\hspace{0.17em}}{\mathrm{fb}}^{-1}$ recorded by the CMS detector at the LHC. No significant excess over the standard model expectation is ...

[Phys. Rev. Lett. 122, 011803] Published Thu Jan 10, 2019

]]>Using ${e}^{+}{e}^{-}$ annihilation data of $2.93\text{\hspace{0.17em}}\text{\hspace{0.17em}}{\mathrm{fb}}^{-1}$ collected at center-of-mass energy $\sqrt{s}=3.773\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{GeV}$ with the BESIII detector, we measure the absolute branching fraction of ${D}^{0}\to {K}^{-}{\mu}^{+}{\nu}_{\mu}$ with significantly improved precision: ${\mathcal{B}}_{{D}^{0}\to {K}^{-}{\mu}^{+}{\nu}_{\mu}}=(3.413\pm 0.01{9}_{\text{stat}}\pm 0.03{5}_{\text{syst}})\%$. Combining with our previous measurement of ${\mathcal{B}}_{{D}^{0}\to {\mathrm{...}}^{}}$

[Phys. Rev. Lett. 122, 011804] Published Thu Jan 10, 2019

]]>We demonstrate coherent control over the photoelectron circular dichroism in randomly oriented chiral molecules, based on quantum interference between multiple photoionization pathways. To significantly enhance the chiral signature, we use a finite manifold of indistinguishable ($1+{1}^{\prime}$) resonantly enh...

[Phys. Rev. Lett. 122, 013204] Published Thu Jan 10, 2019

]]>We present a protocol to selectively decouple, recouple, and engineer effective interactions in mesoscopic dipolar spin networks. In particular, we develop a versatile protocol that relies upon magic angle spinning to perform Hamiltonian engineering. By using global control fields in conjunction wit...

[Phys. Rev. Lett. 122, 013205] Published Thu Jan 10, 2019

]]>Optically induced breaking of symmetries plays an important role in nonlinear photonics, with applications ranging from optical switching in integrated photonic circuits to soliton generation in ring lasers. In this work we study for the first time the interplay of two types of spontaneous symmetry ...

[Phys. Rev. Lett. 122, 013905] Published Thu Jan 10, 2019

]]>Liquid falling from a horizontal film displays an intriguing pattern of inwardly rotating spirals.

[Phys. Rev. Lett. 122, 014502] Published Thu Jan 10, 2019

]]>We report an experimental measurement of the rms temperature (${\sigma}_{T}$) profiles in two regions inside a large aspect ratio ($\mathrm{\Gamma}=4.2$) rectangular convection cell. It is found that, in the region where the boundary layer is sheared by a large-scale wind, ${\sigma}_{T}$ has a power-law dependence on the vertical distance...

[Phys. Rev. Lett. 122, 014503] Published Thu Jan 10, 2019

]]>We report the experimental generation of highly energetic carbon ions up to 48 MeV per nucleon by shooting double-layer targets composed of well-controlled slightly underdense plasma and ultrathin foils with ultraintense femtosecond laser pulses. Particle-in-cell simulations reveal that carbon ions ...

[Phys. Rev. Lett. 122, 014803] Published Thu Jan 10, 2019

]]>An approach for accelerating a quasimonoenergetic proton bunch via a hemispherically converging collisionless shock created in laser-cluster interactions at the relativistically induced transparency (RIT) regime is studied using three-dimensional particle-in-cell simulations. By the action of focusi...

[Phys. Rev. Lett. 122, 014804] Published Thu Jan 10, 2019

]]>Contemporary models of bounded plasmas assume that the target plasma electron temperature far exceeds the temperature of the cold electrons emitted from the target, ${T}_{\text{emit}}$. We show that when the sheath facing a collisional plasma becomes inverted, the target plasma electron temperature has to equal ${T}_{\text{...}}$

[Phys. Rev. Lett. 122, 015003] Published Thu Jan 10, 2019

]]>Acoustic emission (AE) measurements performed during the compressive loading of concrete samples with three different microstructures (aggregate sizes and porosity) and four sample sizes revealed that failure is preceded by an acceleration of the rate of fracturing events, power law distributions of...

[Phys. Rev. Lett. 122, 015502] Published Thu Jan 10, 2019

]]>High speed photography and thermometry answer whether shear bands, the localized deformation of metals under extreme strain, are caused by heat or cause heat themselves.

[Phys. Rev. Lett. 122, 015503] Published Thu Jan 10, 2019

]]>Recent studies on a quasi-one-dimensional (quasi-1D) charge-density-wave (CDW) system, In atomic wires on Si(111), have brought intriguing issues on topological solitons in quasi-1D systems: the existence of few-atom-sized solitons, chirality of solitons, and the realization of logic exploiting the ...

[Phys. Rev. Lett. 122, 016102] Published Thu Jan 10, 2019

]]>Electron energy loss spectroscopy in Z-contrast imaging can detect single atom vibrational modes excited by phonons.

[Phys. Rev. Lett. 122, 016103] Published Thu Jan 10, 2019

]]>The thermodynamic properties of subsystems in strong interaction with the neighborhood can largely differ from the standard behavior. Here we study the thermodynamic properties of rings and triplets in equilibrated disordered 2D silica. Their statistics follows a Boltzmann behavior, albeit with a st...

[Phys. Rev. Lett. 122, 016104] Published Thu Jan 10, 2019

]]>We propose the concept of a “hybridization-switching induced Mott transition” which is relevant to a broad class of $AB{\mathrm{O}}_{3}$ perovskite materials including ${\mathrm{BiNiO}}_{3}$ and ${\mathrm{PbCrO}}_{3}$ that feature extended $6s$ orbitals on the $A$-site cation (Bi or Pb), and a strong $A\text{\u2212}\mathrm{O}$ covalency induced ligand hole. Using *ab initio*...

[Phys. Rev. Lett. 122, 016404] Published Thu Jan 10, 2019

]]>Time-resolved vibrational spectroscopy constitutes an invaluable experimental tool for monitoring hot-carrier-induced surface reactions. However, the absence of a full understanding of the precise microscopic mechanisms causing the transient spectral changes has limited its applicability. Here we in...

[Phys. Rev. Lett. 122, 016806] Published Thu Jan 10, 2019

]]>We investigate the nature of the phase transition between the period-three charge-density wave and the disordered phase of a hard-boson model proposed in the context of cold-atom experiments. Building on a density-matrix renormalization group algorithm that takes full advantage of the hard-boson con...

[Phys. Rev. Lett. 122, 017205] Published Thu Jan 10, 2019

]]>In forced wetting, a rapidly moving surface drags with it a thin layer of trailing fluid as it is plunged into a second fluid bath. Using high-speed interferometry, we find characteristic structure in the thickness of this layer with multiple thin flat triangular structures separated by much thicker...

[Phys. Rev. Lett. 122, 018001] Published Thu Jan 10, 2019

]]>An optical analogue of stimulated Hawking radiation is observed in nonlinear fiber optics used as a laboratory analogue of black holes.

[Phys. Rev. Lett. 122, 010404] Published Wed Jan 09, 2019

]]>Spin dynamics induced by nonlocal interactions are imaged for the first time in a system of cold atoms trapped in an optical cavity.

[Phys. Rev. Lett. 122, 010405] Published Wed Jan 09, 2019

]]>We consider a quantum communication task between two users Alice and Bob, in which Alice and Bob exchange their respective quantum information by means of local operations and classical communication assisted by shared entanglement. Here, we assume that Alice and Bob may have quantum side informatio...

[Phys. Rev. Lett. 122, 010502] Published Wed Jan 09, 2019

]]>We experimentally realize a universal set of single-bit and two-bit geometric quantum gates by adiabatically controlling solid-state spins in a diamond defect. Compared with the nonadiabatic approach, the adiabatic scheme for geometric quantum computation offers a unique advantage of inherent robust...

[Phys. Rev. Lett. 122, 010503] Published Wed Jan 09, 2019

]]>We reveal a continuous dynamical heating transition between a prethermal and an infinite-temperature stage in a clean, chaotic periodically driven classical spin chain. The transition time is a steep exponential function of the drive frequency, showing that the exponentially long-lived prethermal pl...

[Phys. Rev. Lett. 122, 010602] Published Wed Jan 09, 2019

]]>We present the first results for resolving methane (${\mathrm{CH}}_{4}$) line transition frequencies down to the kilohertz level for overlapping lines using comb-linked cavity ring-down spectroscopy, while most available laboratory measurements, having resolution at the megahertz level, cannot separate merged lines...

[Phys. Rev. Lett. 122, 013002] Published Wed Jan 09, 2019

]]>We show that the intensity of self-seeded ${\mathrm{N}}_{2}^{+}$ lasing at 391 nm, assigned to the ${B}^{2}{\mathrm{\Sigma}}_{u}^{+}({v}^{\prime}=0)\to {X}^{2}{\mathrm{\Sigma}}_{g}^{+}({v}^{\prime \prime}=0)$ emission, is enhanced by 2 orders of magnitude by modulating in time the polarization of an intense ultrashort near-IR (40 fs, 800 nm) laser pulse with which ${\mathrm{N}}_{2}$ is irradiated. We find that this d...

[Phys. Rev. Lett. 122, 013202] Published Wed Jan 09, 2019

]]>Elliptically polarized laser pulses (EPLPs) are widely applied in many fields of ultrafast sciences, but the ellipticity ($\u03f5$) has never been *in situ* measured in the interaction zone of the laser focus. In this Letter, we propose and realize a robust scheme to retrieve the $\u03f5$ by temporally overlapping ...

[Phys. Rev. Lett. 122, 013203] Published Wed Jan 09, 2019

]]>We study the loss of atoms in quantum Newton’s cradles with a range of average energies and transverse confinements. We find that the three-body collision rate in one-dimension is strongly energy dependent, as predicted by a strictly 1D theory. We adapt the theory to atoms in waveguides, then, using...

[Phys. Rev. Lett. 122, 013402] Published Wed Jan 09, 2019

]]>Performing accurate position measurements of a mechanical resonator by coupling it to some optically driven quantum emitter is an important challenge for quantum sensing and metrology. We fully characterize the quantum noise associated with this measurement process, by deriving master equations for ...

[Phys. Rev. Lett. 122, 013602] Published Wed Jan 09, 2019

]]>We study the ultimate limits to the decoherence rate associated with dephasing processes. Fluctuating chaotic quantum systems are shown to exhibit extreme decoherence, with a rate that scales exponentially with the particle number, thus exceeding the polynomial dependence of systems with fluctuating...

[Phys. Rev. Lett. 122, 014103] Published Wed Jan 09, 2019

]]>An array of air channels behaves as an “acoustic Chern insulator” in which sound waves travel only around the edges and only in one direction.

[Phys. Rev. Lett. 122, 014302] Published Wed Jan 09, 2019

]]>A novel approach is proposed to demonstrate the two-photon Breit-Wheeler process by using collimated and wide-bandwidth $\gamma $-ray pulses driven by 10-PW lasers. Theoretical calculations suggest that more than $3.2\times {10}^{8}$ electron-positron pairs with a divergence angle of 7° can be created per shot, and the ...

[Phys. Rev. Lett. 122, 014802] Published Wed Jan 09, 2019

]]>Fast magnetic reconnection occurs in nearly all natural and laboratory plasmas and rapidly releases stored magnetic energy. Although commonly studied in fully ionized plasmas, if and when fast reconnection can occur in partially ionized plasmas, such as the interstellar medium or solar chromosphere,...

[Phys. Rev. Lett. 122, 015101] Published Wed Jan 09, 2019

]]>Light interaction with disordered materials is both complex and fascinating at the same time. Here, we reveal disorder-induced phase transitions in a dielectric Huygens’ metasurface made from silicon nanocylinders that simultaneously support an electric and magnetic dipole resonance. Depending on th...

[Phys. Rev. Lett. 122, 015702] Published Wed Jan 09, 2019

]]>We study the elastic energy landscape of two-dimensional tin oxide (SnO) monolayers and demonstrate a transition temperature of ${T}_{c}=8.5\pm 1.8\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{K}$ using *ab initio* molecular dynamics (MD) that is close to the value of the elastic energy barrier $J$ derived from $T=0\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{K}$ density functional theory calculations....

[Phys. Rev. Lett. 122, 015703] Published Wed Jan 09, 2019

]]>We report a novel method to introduce feature size into the prevalent deformation-mechanism map by the superplastic nanomolding technique. This new map enables various deformation mechanisms to be decoupled and allows for experimentally identifying the boundary between dislocation and diffusion domi...

[Phys. Rev. Lett. 122, 016101] Published Wed Jan 09, 2019

]]>Despite decades of studies of the charge density wave (CDW) of $2H\text{\u2212}{\mathrm{NbSe}}_{2}$, the origin of its incommensurate CDW ground state has not been understood. We discover that the CDW of $2H\text{\u2212}{\mathrm{NbSe}}_{2}$ is composed of two different, energetically competing, structures. The lateral heterostructures of two CDWs are ent...

[Phys. Rev. Lett. 122, 016403] Published Wed Jan 09, 2019

]]>Nodal line semimetals are characterized by nontrivial bulk-band crossings, giving rise to almost flat drumheadlike surface states (DSS), which provide an attractive playground where interaction can induce symmetry-broken states and potential emergent phases. Here, we show that electronic interaction...

[Phys. Rev. Lett. 122, 016803] Published Wed Jan 09, 2019

]]>Distinct from all the existing methods for determining the spin Hall angle with bilayers, we have developed a new approach based on the mesoscopic $\mathsf{H}$-shaped structure, which generates and detects pure spin current in a single metal. Using this approach we have unequivocally addressed the long-standin...

[Phys. Rev. Lett. 122, 016804] Published Wed Jan 09, 2019

]]>By taking into account interactions with polarons, ambiguities in previous studies of adsorbed carbon monoxide can be resolved.

[Phys. Rev. Lett. 122, 016805] Published Wed Jan 09, 2019

]]>Epitaxial bilayer films of Bi(110) and Ni host a time-reversal symmetry breaking superconducting order with an unexpectedly high transition temperature ${T}_{c}=4.1\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{K}$. Using time-domain THz spectroscopy, we measure the low energy electrodynamic response of a Bi/Ni bilayer thin film from 0.2 to 2 THz as a...

[Phys. Rev. Lett. 122, 017002] Published Wed Jan 09, 2019

]]>Using Lorentz transmission electron microscopy and small-angle electron scattering techniques, we investigate the temperature-dependent evolution of a magnetic stripe pattern period in thin-film lamellae of the prototype monoaxial chiral helimagnet ${\mathrm{CrNb}}_{3}{\mathrm{S}}_{6}$. The sinusoidal stripe pattern appears due ...

[Phys. Rev. Lett. 122, 017204] Published Wed Jan 09, 2019

]]>There is currently great interest in the strong coupling between the quantized photon field of a cavity and electronic or other degrees of freedom in materials. A major goal is the creation of novel collective states entangling photons with those degrees of freedom. Here we show that the cooperative...

[Phys. Rev. Lett. 122, 017401] Published Wed Jan 09, 2019

]]>Evolution is essential for shaping the biological functions. Darwin proposed the selection as the driving force for evolution upon mutations. While mutations are clear, the quantification of the selection force is still challenging. In this study, we identified and quantified both thermodynamic stab...

[Phys. Rev. Lett. 122, 018103] Published Wed Jan 09, 2019

]]>[Phys. Rev. Lett. 122, 019901] Published Wed Jan 09, 2019

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