We study the degradability of fermionic Gaussian channels. Fermionic quantum channels are a central building block of quantum information processing with fermions, and the family of Gaussian channels, in particular, is relevant in the emerging field of electron quantum optics and its applications fo...

[Phys. Rev. Lett. 121, 200501] Published Tue Nov 13, 2018

]]>New and nontrivial properties of off-shell instantons in loop quantum cosmology show that dynamical signature change naturally cures recently observed problems in the semiclassical path integral of quantum gravity. If left unsolved, these problems would doom any theory of smooth initial conditions o...

[Phys. Rev. Lett. 121, 201301] Published Tue Nov 13, 2018

]]>Predictions are made for elliptic flow in collisions of polarized deuterons with a heavy nucleus. It is shown that the eccentricity of the initial fireball, evaluated with respect to the deuteron polarization axis perpendicular to the beam direction, has a substantial magnitude for collisions of hig...

[Phys. Rev. Lett. 121, 202301] Published Tue Nov 13, 2018

]]>At high baryon chemical potential ${\mu}_{B}$, the equation of state of QCD allows a weak-coupling expansion in the QCD coupling ${\alpha}_{s}$. The result is currently known up to and including the full next-to-next-to-leading order ${\alpha}_{s}^{2}$. Starting at this order, the computations are complicated by the modification of pa...

[Phys. Rev. Lett. 121, 202701] Published Tue Nov 13, 2018

]]>We investigate the Kondo effect in an open quantum system, motivated by recent experiments with ultracold alkaline-earth(-like) atoms. Because of inelastic collisions and the associated atom losses, this system is described by a complex-valued Kondo interaction and provides a non-Hermitian extension...

[Phys. Rev. Lett. 121, 203001] Published Tue Nov 13, 2018

]]>We use scanning tunneling microscopy, photoelectron spectroscopy, and *ab initio* calculations to investigate the electron-induced dissociation of halogenated benzene molecules adsorbed on ice. Dissociation of halobenzene is triggered by delocalized excess electrons attaching to the ${\pi}^{*}$ orbitals of the...

[Phys. Rev. Lett. 121, 206001] Published Tue Nov 13, 2018

]]>The search for one-dimensional (1D) topologically protected electronic states has become an important research goal for condensed matter physics owing to their potential use in spintronic devices or as a building block for topologically nontrivial electronic states. Using low temperature scanning tu...

[Phys. Rev. Lett. 121, 206401] Published Tue Nov 13, 2018

]]>We report the electronic structure of CuTe with a high charge density wave (CDW) transition temperature ${\mathrm{T}}_{c}=335\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{K}$ by angle-resolved photoemission spectroscopy. An anisotropic charge density wave gap with a maximum value of 190 meV is observed in the quasi-one-dimensional band formed by Te ${p}_{x}$ orbital...

[Phys. Rev. Lett. 121, 206402] Published Tue Nov 13, 2018

]]>The precise nature of many-body localization (MBL) transitions in both random and quasiperiodic (QP) systems remains elusive so far. In particular, whether MBL transitions in QP and random systems belong to the same universality class or two distinct ones has not been decisively resolved. Here, we i...

[Phys. Rev. Lett. 121, 206601] Published Tue Nov 13, 2018

]]>We present a combined experimental and theoretical study of the evolution of the Fermi surface of the anomalous superconductor ${\mathrm{Pb}}_{1-x}{\mathrm{Tl}}_{x}\mathrm{Te}$ as a function of thallium concentration, drawing on a combination of magnetotransport measurements (Shubnikov–de Haas oscillations and the Hall coefficient), angl...

[Phys. Rev. Lett. 121, 207001] Published Tue Nov 13, 2018

]]>Using molecular simulations on model polymer nanocomposites at fixed filler loading, we show that interfacial polymer dynamics are affected less with decreasing nanoparticle (NP) size. However, the glass transition temperature ${T}_{g}$ changes substantially more for an extremely small NP. The reason for t...

[Phys. Rev. Lett. 121, 207801] Published Tue Nov 13, 2018

]]>Astrophysicists dropped beads onto clumps of dust to better understand how planets coalesce from particulates.

[Phys. Rev. Lett. 121, 208001] Published Tue Nov 13, 2018

]]>An imaging probe on an airplane observes the clustering of water droplets in clouds, confirming a predicted effect that is correlated with rainfall.

[Phys. Rev. Lett. 121, 204501] Published Mon Nov 12, 2018

]]>Entanglement is an invaluable resource for fundamental tests of physics and the implementation of quantum information protocols such as device-independent secure communications. In particular, time-bin entanglement is widely exploited to reach these purposes both in free space and optical fiber prop...

[Phys. Rev. Lett. 121, 190401] Published Fri Nov 09, 2018

]]>We show that the minimal rate of noise needed to catalytically erase the entanglement in a bipartite quantum state is given by the regularized relative entropy of entanglement. This offers a solution to the central open question raised in [Groisman *et al.*, Phys. Rev. A **72**, 032317 (2005)] and complem...

[Phys. Rev. Lett. 121, 190503] Published Fri Nov 09, 2018

]]>A question that is commonly asked in all areas of physics is how a certain property of a physical system can be used to achieve useful tasks and how to quantify the amount of such a property in a meaningful way. We answer this question by showing that, in a general resource-theoretic framework that ...

[Phys. Rev. Lett. 121, 190504] Published Fri Nov 09, 2018

]]>Coalescing binary black holes emit anisotropic gravitational radiation. This causes a net emission of linear momentum that produces a gradual acceleration of the source. As a result, the final remnant black hole acquires a characteristic velocity known as recoil velocity or gravitational kick. The s...

[Phys. Rev. Lett. 121, 191102] Published Fri Nov 09, 2018

]]>We present Monte Carlo calculations of the thermodynamics of the ($2+1$)-dimensional Thirring model at finite density. We bypass the sign problem by deforming the domain of integration of the path integral into complex space in such a way as to maximize the average sign within a parameterized family o...

[Phys. Rev. Lett. 121, 191602] Published Fri Nov 09, 2018

]]>We study the structure of thermal spectral function of the stress-energy tensor in $\mathcal{N}=4$ supersymmetric Yang-Mills theory at intermediate ‘t Hooft coupling and infinite number of colors. In gauge-string duality, this analysis reduces to the study of classical bulk supergravity with higher-derivative c...

[Phys. Rev. Lett. 121, 191603] Published Fri Nov 09, 2018

]]>The lifetimes of the first excited ${2}^{+}$, ${4}^{+}$, and ${6}^{+}$ states in ${}^{98}\mathrm{Zr}$ were measured with the recoil-distance Doppler shift method in an experiment performed at GANIL. Excited states in ${}^{98}\mathrm{Zr}$ were populated using the fission reaction between a $6.2\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{MeV}/\mathrm{u}$ ${}^{238}\mathrm{U}$ beam and a ${}^{9}\mathrm{Be}$ target. The $\gamma $ rays were detected...

[Phys. Rev. Lett. 121, 192501] Published Fri Nov 09, 2018

]]>Lifetime measurements of excited states of the light $N=52$ isotones ${}^{88}\mathrm{Kr}$, ${}^{86}\mathrm{Se}$, and ${}^{84}\mathrm{Ge}$ have been performed, using the recoil distance Doppler shift method and VAMOS and AGATA spectrometers for particle identification and gamma spectroscopy, respectively. The reduced electric quadrupole transition p...

[Phys. Rev. Lett. 121, 192502] Published Fri Nov 09, 2018

]]>Following experimental realizations of room temperature polariton lasing with organic molecules, we present a microscopic model that allows us to explore the crossover from weak to strong matter-light coupling. We consider a nonequilibrium Dicke-Holstein model, including both strong coupling to vibr...

[Phys. Rev. Lett. 121, 193601] Published Fri Nov 09, 2018

]]>Laser tricks allow nanoparticle position measurements with just 0.6-angstrom uncertainty, which will be useful in future nanotech devices.

[Phys. Rev. Lett. 121, 193902] Published Fri Nov 09, 2018

]]>We reveal that metasurfaces created by seemingly different lattices of (dielectric or metallic) meta-atoms with broken in-plane symmetry can support sharp high-$Q$ resonances arising from a distortion of symmetry-protected bound states in the continuum. We develop a rigorous theory of such asymmetric ...

[Phys. Rev. Lett. 121, 193903] Published Fri Nov 09, 2018

]]>Acoustic waves in a linear time-invariant medium are generally reciprocal; however, reciprocity can break down in a time-variant system. In this Letter, we report on an experimental demonstration of nonreciprocity in a dynamic one-dimensional phononic crystal, where the local elastic properties are ...

[Phys. Rev. Lett. 121, 194301] Published Fri Nov 09, 2018

]]>We show that the ground state of a dipolar Bose gas in a cylindrically symmetric harmonic trap has a rich phase diagram, including droplet crystal states in which a set of droplets arrange into a lattice pattern that breaks the rotational symmetry. An analytic model for small droplet crystals is dev...

[Phys. Rev. Lett. 121, 195301] Published Fri Nov 09, 2018

]]>Through a series of Raman spectroscopy studies, we investigate the behavior of hydrogen-helium and hydrogen-nitrogen mixtures at high pressure across a wide range of concentrations. We find that there is no evidence of chemical association or increased miscibility of hydrogen and helium in the solid...

[Phys. Rev. Lett. 121, 195702] Published Fri Nov 09, 2018

]]>Single layers of transition metal dichalcogenides (TMDCs) are excellent candidates for electronic applications beyond the graphene platform; many of them exhibit novel properties including charge density waves (CDWs) and magnetic ordering. CDWs in these single layers are generally a planar projectio...

[Phys. Rev. Lett. 121, 196402] Published Fri Nov 09, 2018

]]>The built-in potential is of central importance to the understanding of many interfacial phenomena because it determines the band alignment at the interface. Despite its importance, its exact sign and magnitude have generally been recognized as ill-defined quantities for more than half a century. He...

[Phys. Rev. Lett. 121, 196802] Published Fri Nov 09, 2018

]]>A magnetic-impurity junction whose exchange coupling can be mechanically tuned with an STM tip manipulating the flexibility of Fe-porphin.

[Phys. Rev. Lett. 121, 196803] Published Fri Nov 09, 2018

]]>The phenomenon of $T$-linear resistivity commonly observed in a number of strange metals has been widely seen as evidence for the breakdown of the quasiparticle picture of metals. This study shows that a recently discovered $H/T$ scaling relationship in the magnetoresistance of the strange metal ${\mathrm{BaFe}}_{2}({\mathrm{A...}}_{}$

[Phys. Rev. Lett. 121, 197002] Published Fri Nov 09, 2018

]]>Very recently a quantum liquid was reported to form in ${\mathrm{H}}_{3}{\mathrm{LiIr}}_{2}{\mathrm{O}}_{6}$, an iridate proposed to be a close realization of the Kitaev honeycomb model. To test this assertion we perform detailed quantum chemistry calculations to determine the magnetic interactions between Ir moments. We find that weakly bond...

[Phys. Rev. Lett. 121, 197203] Published Fri Nov 09, 2018

]]>Molecular chirality is conventionally understood as space-inversion-symmetry breaking in the equilibrium structure of molecules. Less well known is that achiral molecules can be made chiral through extreme rotational excitation. Here, we theoretically demonstrate a clear strategy for generating rota...

[Phys. Rev. Lett. 121, 193201] Published Thu Nov 08, 2018

]]>Forming an ion in an ultracold atomic cloud delays the subsequent creation of a Rydberg atom until the ion wanders away.

[Phys. Rev. Lett. 121, 193401] Published Thu Nov 08, 2018

]]>A search for resonant and nonresonant pair production of Higgs bosons in the $b\overline{b}{\tau}^{+}{\tau}^{-}$ final state is presented. The search uses $36.1\text{\hspace{0.17em}}\text{\hspace{0.17em}}{\mathrm{fb}}^{-1}$ of $pp$ collision data with $\sqrt{s}=13\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{TeV}$ recorded by the ATLAS experiment at the LHC in 2015 and 2016. Decays of the $\tau $-lepton pairs with at least one $\tau $ lepton decaying...

[Phys. Rev. Lett. 121, 191801] Published Wed Nov 07, 2018

]]>We perform a nonperturbative study of the electroweak phase transition (EWPT) in the two Higgs doublet model (2HDM) by deriving a dimensionally reduced high-temperature effective theory for the model, and matching to known results for the phase diagram of the effective theory. We find regions of the...

[Phys. Rev. Lett. 121, 191802] Published Wed Nov 07, 2018

]]>Active plasma lensing is a compact technology for strong focusing of charged particle beams, which has gained considerable interest for use in novel accelerator schemes. While providing $\mathrm{kT}/\mathrm{m}$ focusing gradients, active plasma lenses can have aberrations caused by a radially nonuniform plasma temperat...

[Phys. Rev. Lett. 121, 194801] Published Wed Nov 07, 2018

]]>We show that the Nielsen-Ninomiya no-go theorem still holds on a Floquet lattice: there is an equal number of right-handed and left-handed Weyl points in a three-dimensional Floquet lattice. However, in the adiabatic limit, where the time evolution of the low-energy subspace is decoupled from the hi...

[Phys. Rev. Lett. 121, 196401] Published Wed Nov 07, 2018

]]>[Phys. Rev. Lett. 121, 199902] Published Wed Nov 07, 2018

]]>We solve a model that has basic features that are desired for quantum annealing computations: entanglement in the ground state, controllable annealing speed, ground state energy separated by a gap during the whole evolution, and a programmable computational problem that is encoded by parameters of t...

[Phys. Rev. Lett. 121, 190601] Published Tue Nov 06, 2018

]]>Amorphous silicon has ideal properties for many applications in fundamental research and industry. However, the optical absorption is often unacceptably high, particularly for gravitational-wave detection. We report a novel ion-beam deposition method for fabricating amorphous silicon with unpreceden...

[Phys. Rev. Lett. 121, 191101] Published Tue Nov 06, 2018

]]>We study, for the first time, the Casimir effect in non-Abelian gauge theory using first-principles numerical simulations. Working in two spatial dimensions at zero temperature, we find that closely spaced perfect chromoelectric conductors attract each other with a small anomalous scaling dimension....

[Phys. Rev. Lett. 121, 191601] Published Tue Nov 06, 2018

]]>We propose a method for ultrasensitive displacement and phase measurements based on a nanoantenna illuminated with interfering evanescent waves. We show that with a proper nanoantenna design, tiny displacements and relative phase variations can be converted into changes of the scattering direction i...

[Phys. Rev. Lett. 121, 193901] Published Tue Nov 06, 2018

]]>Using ultrasound imaging velocimetry, we are able to present unique insight in transitional particle-laden flows. Together with a Moody diagram of time-averaged properties, we demonstrate that the laminar-turbulent transition behavior at high volume fractions is distinct from the single-phase case a...

[Phys. Rev. Lett. 121, 194501] Published Tue Nov 06, 2018

]]>The melting point of silicon in the cubic diamond phase is calculated using the random phase approximation (RPA). The RPA includes exact exchange as well as an approximate treatment of local as well as nonlocal many body correlation effects of the electrons. We predict a melting temperature of about...

[Phys. Rev. Lett. 121, 195701] Published Tue Nov 06, 2018

]]>We propose a tune-free scheme to realize Kramers pairs of Majorana bound states in recently discovered higher-order topological insulators (HOTIs). We show that, by bringing two hinges of a HOTI into the proximity of an $s$-wave superconductor, the competition between local and crossed Andreev pairing...

[Phys. Rev. Lett. 121, 196801] Published Tue Nov 06, 2018

]]>We compute the compressibility of the conduction electrons in both bulk orthorhombic FeSe and monolayer FeSe on a ${\mathrm{SrTiO}}_{3}$ substrate, including dynamical electronic correlations within slave-spin mean-field $+$ density-functional theory. Results show a zone of enhancement of the electronic compressibili...

[Phys. Rev. Lett. 121, 197001] Published Tue Nov 06, 2018

]]>Various transitions that a magnetic Skyrmion can undergo are found in calculations using a method for climbing up the energy surface and converging onto first order saddle points. In addition to collapse and escape through a boundary, the method identifies a transition where the Skyrmion divides and...

[Phys. Rev. Lett. 121, 197202] Published Tue Nov 06, 2018

]]>[Phys. Rev. Lett. 121, 199901] Published Tue Nov 06, 2018

]]>Typical studies of quantum error correction assume probabilistic Pauli noise, largely because it is relatively easy to analyze and simulate. Consequently, the effective logical noise due to physically realistic coherent errors is relatively unknown. Here, we prove that encoding a system in a stabili...

[Phys. Rev. Lett. 121, 190501] Published Mon Nov 05, 2018

]]>An optical-fiber-based quantum cryptography scheme works over a record distance of 421 km and at much faster rates than previous long-distance demonstrations.

[Phys. Rev. Lett. 121, 190502] Published Mon Nov 05, 2018

]]>The acoustic waves emitted by a propagating crack can affect the crack’s motion and the marks it leaves behind.

[Phys. Rev. Lett. 121, 195501] Published Mon Nov 05, 2018

]]>We present a theoretical mapping to show that a ferromagnet with gain (loss) is equivalent to an antiferromagnet with an equal amount of loss (gain). Our findings indicate a novel first-order ferromagnet-antiferromagnet phase transition by tuning the gain-loss parameter. As an appealing application,...

[Phys. Rev. Lett. 121, 197201] Published Mon Nov 05, 2018

]]>Bell’s theorem has been proposed to certify, in a device-independent and robust way, blocks either producing or measuring quantum states. In this Letter, we provide a method based on Bell’s theorem to certify coherent operations for the storage, processing, and transfer of quantum information. This ...

[Phys. Rev. Lett. 121, 180505] Published Fri Nov 02, 2018

]]>Forecasting the signal discrimination power of dark matter (DM) searches is commonly limited to a set of arbitrary benchmark points. We introduce new methods for benchmark-free forecasting that instead allow an exhaustive exploration and visualization of the phenomenological distinctiveness of DM mo...

[Phys. Rev. Lett. 121, 181101] Published Fri Nov 02, 2018

]]>A fast charged particle crossing the boundary between chiral matter and vacuum radiates transition radiation. Its most remarkable features—the resonant behavior at a certain emission angle and the circular polarization of the spectrum—depend on the parameters of the chiral anomaly in a particular ma...

[Phys. Rev. Lett. 121, 182301] Published Fri Nov 02, 2018

]]>The atomic dipole polarizability $\alpha $ and the van der Waals (vdW) radius ${R}_{\text{vdW}}$ are two key quantities to describe vdW interactions between atoms in molecules and materials. Until now, they have been determined independently and separately from each other. Here, we derive the quantum-mechanical relation ${\mathrm{...}}_{}$

[Phys. Rev. Lett. 121, 183401] Published Fri Nov 02, 2018

]]>It has long been predicted that permanent electron-positron pairs can be created from the quantum vacuum at those spatial regions where an external electric field exceeds a supercritical value. By solving the Dirac equation numerically, we show that the yield of the created positrons at targeted ene...

[Phys. Rev. Lett. 121, 183606] Published Fri Nov 02, 2018

]]>With a low emittance and short-bunch electron beam at a high repetition rate realized by a superconducting linac, stimulated excitation of an optical cavity at the terahertz spectrum range is shown. The electron beam passes through small holes in the cavity mirrors without being destroyed. A sharp r...

[Phys. Rev. Lett. 121, 184801] Published Fri Nov 02, 2018

]]>Topological superfluids protected by mirror and time-reversal symmetries are exotic states of matter possessing Majorana Kramers pairs (MKPs), yet their realizations have long been hindered by the requirement of unconventional pairing. We propose to realize such a topological superfluid by utilizing...

[Phys. Rev. Lett. 121, 185302] Published Fri Nov 02, 2018

]]>We perform molecular-dynamics simulations of the vibrational and elastoplastic properties of polymeric glasses and crystals and the corresponding atomic systems. We evidence that the elastic scaling of the density of states in the low-frequency boson peak (BP) region is different in crystals and gla...

[Phys. Rev. Lett. 121, 185502] Published Fri Nov 02, 2018

]]>Attractive colloids display two distinct amorphous solid phases: the attractive glass due to particle bonding and the repulsive glass due to the hard-core repulsion. By means of a microscopic mean field approach, we analyze their response to a quasistatic shear strain. We find that the presence of t...

[Phys. Rev. Lett. 121, 185503] Published Fri Nov 02, 2018

]]>We demonstrate that application of an oscillatory electric field to a liquid yields a long-range steady field, provided the ions present have unequal mobilities. The main physics is illustrated by a two-ion harmonic oscillator, yielding an asymmetric rectified field whose time average scales as the ...

[Phys. Rev. Lett. 121, 185504] Published Fri Nov 02, 2018

]]>Thermal expansion of ${\mathrm{H}}_{2}\mathrm{O}$ and ${\mathrm{D}}_{2}\mathrm{O}$ ice Ih with relative resolution of 1 ppb is reported. A large transition in the thermal expansion coefficient at 101 K in ${\mathrm{H}}_{2}\mathrm{O}$ moves to 125 K in ${\mathrm{D}}_{2}\mathrm{O}$, revealing one of the largest-known isotope effects. Rotational oscillatory modes that couple poorly to phonons, i.e., ...

[Phys. Rev. Lett. 121, 185505] Published Fri Nov 02, 2018

]]>Beyond dilute coverage, the collective diffusion of molecules might enhance material transport. We reveal an enhanced mobility of molecular dimers by separating two motions, diffusion and rotation, of CO dimers on elemental Ag(100) as well as on a dilute Cu alloy of Ag(100). From time-lapsed scannin...

[Phys. Rev. Lett. 121, 185901] Published Fri Nov 02, 2018

]]>We propose a general and robust platform, the *moiré valleytronics*, to realize high-density arrays of 1D topological helical channels in real materials at room temperature. We demonstrate the idea using a long-period 1D moiré pattern of graphene on $h\mathrm{BN}$ by first-principles calculation. Through calcula...

[Phys. Rev. Lett. 121, 186403] Published Fri Nov 02, 2018

]]>Prototypes of quantum impurities, such as NV and SiV color centers in diamond, have garnered much attention due to their minimally invasive and high-resolution magnetic field and thermal sensing. Here, we investigate quantum-impurity relaxometry as a method for probing collective excitations in magn...

[Phys. Rev. Lett. 121, 187204] Published Fri Nov 02, 2018

]]>We report high-precision small-angle neutron scattering of the orientation of the Skyrmion lattice in a spherical sample of MnSi under systematic changes of the magnetic field direction. For all field directions the Skyrmion lattice may be accurately described as a triple-$\overrightarrow{Q}$ state, where the modulus...

[Phys. Rev. Lett. 121, 187205] Published Fri Nov 02, 2018

]]>Spontaneous self-organization (clustering) in magnetically oriented bacteria arises from attractive pairwise hydrodynamics, which are directly determined through experiment and corroborated by a simple analytical model. Lossless compression algorithms are used to identify the onset of many-body self...

[Phys. Rev. Lett. 121, 188001] Published Fri Nov 02, 2018

]]>A large system of particles with even a small attractive component jams differently than systems made of purely repulsive particles.

[Phys. Rev. Lett. 121, 188002] Published Fri Nov 02, 2018

]]>Constructing a large-scale ion trap quantum processor will require entangling gate operations that are robust in the presence of noise and experimental imperfection. We experimentally demonstrate how a new type of Mølmer-Sørensen gate protects against infidelity caused by heating of the motional mod...

[Phys. Rev. Lett. 121, 180501] Published Thu Nov 01, 2018

]]>High-fidelity two-qubit entangling gates play an important role in many quantum information processing tasks and are a necessary building block for constructing a universal quantum computer. Such high-fidelity gates have been demonstrated on trapped-ion qubits; however, control errors and noise in g...

[Phys. Rev. Lett. 121, 180502] Published Thu Nov 01, 2018

]]>We experimentally realize a Maxwell’s demon that converts information gained by measurements to work. Our setup is composed of a colloidal particle in a channel filled with a flowing fluid. A barrier made by light prevents the particle from being carried away by the flow. The colloidal particle then...

[Phys. Rev. Lett. 121, 180601] Published Thu Nov 01, 2018

]]>We study cooperative phenomena in the fluctuation-induced forces between a surface and a system of neutral two-level quantum emitters prepared in a coherent collective state, showing that the total Casimir-Polder force on the emitters can be modified via their mutual correlations. Particularly, we f...

[Phys. Rev. Lett. 121, 183605] Published Thu Nov 01, 2018

]]>The direction in which fluid circulates in binary drops doesn’t change when the drops are tilted, implicating gravity—not surface tension—as the driver of flow in these systems.

[Phys. Rev. Lett. 121, 184501] Published Thu Nov 01, 2018

]]>The unexpected appearance of a fractional quantum Hall effect (FQHE) plateau at $\nu =2+6/13$ [A. Kumar *et al.*, Phys. Rev. Lett. **105**, 246808 (2010)] offers a clue into the physical mechanism of the FQHE in the second Landau level (SLL). Here we propose a “$\overline{3}\overline{2}111$” parton wave function, which is topologic...

[Phys. Rev. Lett. 121, 186601] Published Thu Nov 01, 2018

]]>We analyze a simple model containing the physical ingredients of a Hund’s metal, the local spin fluctuations with power-law correlators, $({\mathrm{\Omega}}_{0}/|\mathrm{\Omega}|{)}^{\gamma}$, with $\gamma $ greater than one, interacting with electronic quasiparticles. While the critical temperature and the gap change significantly with varying parame...

[Phys. Rev. Lett. 121, 187003] Published Thu Nov 01, 2018

]]>The error in estimating the separation of a pair of incoherent sources from radiation emitted by them and subsequently captured by an imager is fundamentally bounded below by the inverse of the corresponding quantum Fisher information (QFI) matrix. We calculate the QFI for estimating the full three-...

[Phys. Rev. Lett. 121, 180504] Published Wed Oct 31, 2018

]]>We demonstrate optical probing of spectrally resolved single ${\mathrm{Nd}}^{3+}$ rare-earth ions in yttrium orthovanadate. The ions are coupled to a photonic crystal resonator and show strong enhancement of the optical emission rate via the Purcell effect, resulting in near radiatively limited single photon emissi...

[Phys. Rev. Lett. 121, 183603] Published Wed Oct 31, 2018

]]>At room temperature light propagates like a superfluid through an atomic vapor.

[Phys. Rev. Lett. 121, 183604] Published Wed Oct 31, 2018

]]>We present time-resolved measurements of ion heating due to collisional plasma shocks and interpenetrating supersonic plasma flows, which are formed by the oblique merging of two coaxial-gun-formed plasma jets. Our study is repeated using four jet species: N, Ar, Kr, and Xe. In conditions with small...

[Phys. Rev. Lett. 121, 185001] Published Wed Oct 31, 2018

]]>The self-similar nonlinear evolution of the multimode ablative Rayleigh-Taylor instability (ARTI) is studied numerically in both two and three dimensions. It is shown that the nonlinear multimode bubble-front penetration follows the ${\alpha}_{b}{A}_{T}({\int \sqrt{g}dt)}^{2}$ scaling law with ${\alpha}_{b}$ dependent on the initial conditions...

[Phys. Rev. Lett. 121, 185002] Published Wed Oct 31, 2018

]]>Understanding the energy dissipation mechanism during deformation is essential for the design and application of tough soft materials. We show that, in a class of tough and self-healing polyampholyte hydrogels, a bicontinuous network structure, consisting of a hard network and a soft network, is for...

[Phys. Rev. Lett. 121, 185501] Published Wed Oct 31, 2018

]]>We address a long-standing debate regarding the finite-size scaling (FSS) of the Ising model in high dimensions, by introducing a *random-length random walk* model, which we then study rigorously. We prove that this model exhibits the same universal FSS behavior previously conjectured for the self-avo...

[Phys. Rev. Lett. 121, 185701] Published Wed Oct 31, 2018

]]>We present density functional theory and neutron total scattering studies on quasi-one-dimensional superconducting ${\mathrm{K}}_{2}{\mathrm{Cr}}_{3}{\mathrm{As}}_{3}$ revealing a frustrated structural instability. Our first principles calculations find a significant phonon instability, which, under energy minimization, corresponds to a frust...

[Phys. Rev. Lett. 121, 187002] Published Wed Oct 31, 2018

]]>We propose a stabilizing mechanism for the Bose-Einstein condensation (BEC) of interacting magnons in ferrimagnets and ferromagnets. By studying the effects of the magnon-magnon interaction on the stability of the magnon BEC in a ferrimagnet and two ferromagnets, we show that the magnon BEC remains ...

[Phys. Rev. Lett. 121, 187202] Published Wed Oct 31, 2018

]]>A proposed method for transporting spin from one place to another utilizes superconducting vortices as carriers of spin information.

[Phys. Rev. Lett. 121, 187203] Published Wed Oct 31, 2018

]]>We present an infrared spectroscopy study of ${\mathrm{ZrTe}}_{5}$, which confirms a recent theoretical proposal that this material exhibits a temperature-driven topological quantum phase transition from a weak to a strong topological insulating state with an intermediate Dirac semimetal state around ${T}_{p}\simeq 138\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{K}$. Our...

[Phys. Rev. Lett. 121, 187401] Published Wed Oct 31, 2018

]]>Beliaev damping provides a fundamental mechanism for dissipation of quasiparticles. Previous research has shown that the two-component internal degrees of freedom has no nontrivial effect on Beliaev damping. Here we provide the first example where the spinor nature of Bose gases can manifest itself ...

[Phys. Rev. Lett. 121, 180401] Published Tue Oct 30, 2018

]]>The detection of unusually fast alpha emission from a heavy isotope could lead to new ways of testing the nuclear shell model.

[Phys. Rev. Lett. 121, 182501] Published Tue Oct 30, 2018

]]>We describe a highly robust method, applicable to both electromagnetic and matter-wave beams, that can produce a beam consisting of a lattice of orbital angular momentum (OAM) states coupled to a two-level system. We also define efficient protocols for controlling and manipulating the lattice charac...

[Phys. Rev. Lett. 121, 183602] Published Tue Oct 30, 2018

]]>Carrier doping of quantum spin liquids is a long-proposed route to the emergence of high-temperature superconductivity. Electrochemical intercalation in kagome hydroxyl halide materials shows that samples remain insulating across a wide range of electron counts. Here we demonstrate through first-pri...

[Phys. Rev. Lett. 121, 186402] Published Tue Oct 30, 2018

]]>Majorana bound states often occur at the end of a 1D topological superconductor. Validated by a new bulk invariant and an intuitive edge argument, we show the emergence of one Majorana Kramers pair at each corner of a square-shaped 2D topological insulator proximitized by an ${s}_{\pm}$-wave (e.g., Fe-based)...

[Phys. Rev. Lett. 121, 186801] Published Tue Oct 30, 2018

]]>A mysterious incoherent metallic (IM) normal state with $T$-linear resistivity is ubiquitous among strongly correlated superconductors. Recent progress with microscopic models exhibiting IM transport has presented the opportunity for us to study new models that exhibit direct transitions into a superc...

[Phys. Rev. Lett. 121, 187001] Published Tue Oct 30, 2018

]]>Two-dimensional topological solitons, commonly called Skyrmions, are extensively studied in solid-state magnetic nanostructures and promise many spintronics applications. However, three-dimensional topological solitons dubbed hopfions have not been demonstrated as stable spatially localized structur...

[Phys. Rev. Lett. 121, 187201] Published Tue Oct 30, 2018

]]>We present a method to certify the entanglement of all entangled quantum states in a device-independent way. This is achieved by placing the state in a quantum network and constructing a correlation inequality based on an entanglement witness for the state. Our method is device independent, in the s...

[Phys. Rev. Lett. 121, 180503] Published Mon Oct 29, 2018

]]>Two teams demonstrate that they can count the number of quantized vibrations, or phonons, in cold mechanical oscillators by measuring the energy in the vibrations.

[Phys. Rev. Lett. 121, 183601] Published Mon Oct 29, 2018

]]>A space-time crystal can be created in a superfluid quantum gas by simultaneously breaking discrete time and spatial translation symmetries.

[Phys. Rev. Lett. 121, 185301] Published Mon Oct 29, 2018

]]>We investigate the hidden Berry curvature in bulk $2H\text{\u2212}{\mathrm{WSe}}_{2}$ by utilizing the surface sensitivity of angle resolved photoemission (ARPES). The symmetry in the electronic structure of transition metal dichalcogenides is used to uniquely determine the local orbital angular momentum (OAM) contribution to ...

[Phys. Rev. Lett. 121, 186401] Published Mon Oct 29, 2018

]]>Einstein-Podolsky-Rosen steering is known to be a key resource for one-sided device-independent quantum information protocols. Here we demonstrate steering using hybrid entanglement between continuous- and discrete-variable optical qubits. To this end, we report on suitable steering inequalities and...

[Phys. Rev. Lett. 121, 170403] Published Fri Oct 26, 2018

]]>