Many quantum information protocols rely on optical interference to compare data sets with efficiency or security unattainable by classical means. Standard implementations exploit first-order coherence between signals whose preparation requires a shared phase reference. Here, we analyze and experimen...

[Phys. Rev. Lett. 120, 110502] Published Fri Mar 16, 2018

]]>The transport of excitations between pinned particles in many physical systems may be mapped to single-particle models with power-law hopping, $1/{r}^{a}$. For randomly spaced particles, these models present an effective peculiar disorder that leads to surprising localization properties. We show that in on...

[Phys. Rev. Lett. 120, 110602] Published Fri Mar 16, 2018

]]>Time crystals, a phase showing spontaneous breaking of time-translation symmetry, has been an intriguing subject for systems far away from equilibrium. Recent experiments found such a phase in both the presence and the absence of localization, while in theories localization by disorder is usually as...

[Phys. Rev. Lett. 120, 110603] Published Fri Mar 16, 2018

]]>We propose a method using solid state detectors with directional sensitivity to dark matter interactions to detect low-mass weakly interacting massive particles (WIMPs) originating from galactic sources. In spite of a large body of literature for high-mass WIMP detectors with directional sensitivity...

[Phys. Rev. Lett. 120, 111301] Published Fri Mar 16, 2018

]]>We study a system of atoms that are laser driven to $n{D}_{3/2}$ Rydberg states and assess how accurately they can be mapped onto spin-$1/2$ particles for the quantum simulation of anisotropic Ising magnets. Using nonperturbative calculations of the pair potentials between two atoms in the presence of electr...

[Phys. Rev. Lett. 120, 113602] Published Fri Mar 16, 2018

]]>We investigate Dicke subradiance of $N\ge 2$ distant quantum sources in free space, i.e., the spatial emission patterns of spontaneously radiating noninteracting multilevel atoms or multiphoton sources, prepared in totally antisymmetric states. We find that the radiated intensity is marked by a full supp...

[Phys. Rev. Lett. 120, 113603] Published Fri Mar 16, 2018

]]>We use finite-temperature density functional theory coupled to classical molecular dynamics simulation to calculate the miscibility gap of hydrogen-helium mixtures. The van der Waals density functional (vdW-DF) theory is used, which leads to lower demixing temperatures compared to computations using...

[Phys. Rev. Lett. 120, 115703] Published Fri Mar 16, 2018

]]>We present the theory of quasiparticle transport in perturbatively small inhomogeneous magnetic fields across the ballistic-to-hydrodynamic crossover. In the hydrodynamic limit, the resistivity $\rho $ generically grows proportionally to the rate of momentum-conserving electron-electron collisions at larg...

[Phys. Rev. Lett. 120, 116603] Published Fri Mar 16, 2018

]]>In underdoped cuprates, an incommensurate charge density wave (CDW) order is known to coexist with superconductivity. A dip in ${T}_{c}$ at the hole doping level where the CDW is strongest (${n}_{p}\simeq 0.12$) suggests that CDW order may suppress superconductivity. We investigate the interplay of charge order with su...

[Phys. Rev. Lett. 120, 117002] Published Fri Mar 16, 2018

]]>An ultimate goal of spintronics is to control magnetism via electrical means. One promising way is to utilize a current-induced spin-orbit torque (SOT) originating from the strong spin-orbit coupling in heavy metals and their interfaces to switch a single perpendicularly magnetized ferromagnetic lay...

[Phys. Rev. Lett. 120, 117703] Published Fri Mar 16, 2018

]]>[Phys. Rev. Lett. 120, 119501] Published Fri Mar 16, 2018

]]>[Phys. Rev. Lett. 120, 119502] Published Fri Mar 16, 2018

]]>[Phys. Rev. Lett. 120, 119901] Published Fri Mar 16, 2018

]]>We study the gravitational-wave peak luminosity and radiated energy of quasicircular neutron star mergers using a large sample of numerical relativity simulations with different binary parameters and input physics. The peak luminosity for all the binaries can be described in terms of the mass ratio ...

[Phys. Rev. Lett. 120, 111101] Published Thu Mar 15, 2018

]]>We demonstrate by explicit multiloop calculation that $\gamma $-deformed planar $\mathcal{N}=4$ supersymmetric Yang-Mills (SYM) theory, supplemented with a set of double-trace counterterms, has two nontrivial fixed points in the recently proposed double scaling limit, combining vanishing ’t Hooft coupling and large ima...

[Phys. Rev. Lett. 120, 111601] Published Thu Mar 15, 2018

]]>Examining the Higgs sector at high energy scales through off-shell Higgs production can potentially shed light on the naturalness problem of the Higgs boson mass. We propose such a study at the LHC by utilizing a representative model with a new scalar field ($S$) coupled to the standard model Higgs do...

[Phys. Rev. Lett. 120, 111801] Published Thu Mar 15, 2018

]]>We report the first observation of lasing topological edge states in a 1D Su-Schrieffer-Heeger active array of microring resonators. We show that the judicious use of non-Hermiticity can promote single edge-mode lasing in such arrays. Our experimental and theoretical results demonstrate that, in the...

[Phys. Rev. Lett. 120, 113901] Published Thu Mar 15, 2018

]]>Second-harmonic generation from Au metal nanoislands is significantly enhanced by covering the nanoislands with a thin dielectric film of titanium dioxide.

[Phys. Rev. Lett. 120, 113902] Published Thu Mar 15, 2018

]]>We present results of an experiment showing the first successful demonstration of a cascaded microbunching scheme. Two modulator-chicane prebunchers arranged in series and a high power mid-IR laser seed are used to modulate a 52 MeV electron beam into a train of sharp microbunches phase locked to th...

[Phys. Rev. Lett. 120, 114802] Published Thu Mar 15, 2018

]]>Using molecular simulations, we shed light on the mechanism underlying crystal nucleation in metal alloys and unravel the interplay between crystal nucleation and glass transition, as the conditions of crystallization lie close to this transition. While decreasing the temperature of crystallization ...

[Phys. Rev. Lett. 120, 115701] Published Thu Mar 15, 2018

]]>We use large scale quantum Monte Carlo simulations to study an extended Hubbard model of hard core bosons on the kagome lattice. In the limit of strong nearest-neighbor interactions at $1/3$ filling, the interplay between frustration and quantum fluctuations leads to a valence bond solid ground state....

[Phys. Rev. Lett. 120, 115702] Published Thu Mar 15, 2018

]]>We develop a mathematical framework to analyze electrochemical impedance spectra in terms of a distribution of diffusion times (DDT) for a parallel array of random finite-length Warburg (diffusion) or Gerischer (reaction-diffusion) circuit elements. A robust DDT inversion method is presented based o...

[Phys. Rev. Lett. 120, 116001] Published Thu Mar 15, 2018

]]>We consider a two-dimensional electron gas (2DEG) in the quantum Hall regime in the presence of a Zeeman field, with the Fermi level tuned to a filling factor of $\nu =1$. We show that, in the presence of spin-orbit coupling, contacting the 2DEG with a narrow strip of an $s$-wave superconductor produces a ...

[Phys. Rev. Lett. 120, 116801] Published Thu Mar 15, 2018

]]>Recently, the topological physics in artificial crystals for classical waves has become an emerging research area. In this Letter, we propose a unique bilayer design of sonic crystals that are constructed by two layers of coupled hexagonal array of triangular scatterers. Assisted by the additional l...

[Phys. Rev. Lett. 120, 116802] Published Thu Mar 15, 2018

]]>We show using numerical simulations that slowly driven Skyrmions interacting with random pinning move via correlated jumps or avalanches. The avalanches exhibit power-law distributions in their duration and size, and the average avalanche shape for different avalanche durations can be scaled to a un...

[Phys. Rev. Lett. 120, 117203] Published Thu Mar 15, 2018

]]>The honeycomb Kitaev-Heisenberg model is a source of a quantum spin liquid with Majorana fermions and gauge flux excitations as fractional quasiparticles. Here we unveil the highly unusual low-temperature heat conductivity $\kappa $ of $\alpha \text{\u2212}{\mathrm{RuCl}}_{3}$, a prime candidate for realizing such physics: beyond a magnetic...

[Phys. Rev. Lett. 120, 117204] Published Thu Mar 15, 2018

]]>Point defects in wide-band-gap semiconductors are emerging as versatile resources for nanoscale sensing and quantum information science, but our understanding of the photoionization dynamics is presently incomplete. Here, we use two-color confocal microscopy to investigate the dynamics of charge in ...

[Phys. Rev. Lett. 120, 117401] Published Thu Mar 15, 2018

]]>A proposed dipole source of electromagnetic waves can selectively couple its emission into either of two neighboring waveguides.

[Phys. Rev. Lett. 120, 117402] Published Thu Mar 15, 2018

]]>Theoretical predictions suggest a quantum battery could be implemented in either nanofabricated semiconductor quantum dots in a photonic cavity or superconducting qubits.

[Phys. Rev. Lett. 120, 117702] Published Thu Mar 15, 2018

]]>Lateral correlations along hydrophobic surfaces whose separation can be varied continuously are measured by x-ray scattering using a modified surface force apparatus coupled with synchrotron radiation, named SFAX. A weak isotropic diffuse scattering along the equatorial plane is revealed for mica su...

[Phys. Rev. Lett. 120, 118001] Published Thu Mar 15, 2018

]]>The complex rotational and translational Brownian motion of anisotropic particles depends on their shape and the viscoelasticity of their surroundings. Because of their strong optical scattering and chemical versatility, gold nanorods would seem to provide the ultimate probes of rheology at the nano...

[Phys. Rev. Lett. 120, 118002] Published Thu Mar 15, 2018

]]>We argue that the quenched ultracold plasma presents an experimental platform for studying the quantum many-body physics of disordered systems in the long-time and finite energy-density limits. We consider an experiment that quenches a plasma of nitric oxide to an ultracold system of Rydberg molecul...

[Phys. Rev. Lett. 120, 110601] Published Wed Mar 14, 2018

]]>Trap-assisted recombination is identified as the mechanism responsible for the negative contribution to the capacitance in bipolar organic diodes.

[Phys. Rev. Lett. 120, 116602] Published Wed Mar 14, 2018

]]>Terahertz-pulse excitation experiments provide evidence for a Higgs mode in a d-wave-type, high-temperature cuprate superconductor.

[Phys. Rev. Lett. 120, 117001] Published Wed Mar 14, 2018

]]>Experiments on the optical writing and erasing of magnetic skyrmions in FeGe indicate that more efficient skyrmion generation can be achieved in a cooled sample.

[Phys. Rev. Lett. 120, 117201] Published Wed Mar 14, 2018

]]>As physical implementations of quantum architectures emerge, it is increasingly important to consider the cost of algorithms for practical connectivities between qubits. We show that by using an arrangement of gates that we term the fermionic swap network, we can simulate a Trotter step of the elect...

[Phys. Rev. Lett. 120, 110501] Published Tue Mar 13, 2018

]]>In the large-momentum effective field theory approach to parton physics, the matrix elements of nonlocal operators of quark and gluon fields, linked by straight Wilson lines in a spatial direction, are calculated in lattice quantum chromodynamics as a function of hadron momentum. Using the heavy-qua...

[Phys. Rev. Lett. 120, 112001] Published Tue Mar 13, 2018

]]>The carbon disulphide (${\mathrm{CS}}_{2}$) dimer is formed inside He nanodroplets and identified using fs laser-induced Coulomb explosion, by observing the ${\mathrm{CS}}_{2}^{+}$ ion recoil velocity. It is then shown that a 160 ps moderately intense laser pulse can align the dimer in advantageous spatial orientations which allow us...

[Phys. Rev. Lett. 120, 113202] Published Tue Mar 13, 2018

]]>The direct single-ionization cross section for Ar by positron impact has been measured in the region above the first ionization threshold. These measurements are compared to semiclassical calculations which give rise to a power law variation of the cross section in the threshold region. The experime...

[Phys. Rev. Lett. 120, 113401] Published Tue Mar 13, 2018

]]>A new decoherence-suppression mechanism in photon-photon scattering is revealed in a Rydberg electromagnetically-induced transparent medium.

[Phys. Rev. Lett. 120, 113601] Published Tue Mar 13, 2018

]]>We observe that our experimentally measured emission power enhancement of a speaker inside a previously proposed metacavity agrees with our numerically calculated enhancement of the density of states (DOS) of the source-cavity system. We interpret the agreement by formulating a relation between the ...

[Phys. Rev. Lett. 120, 114301] Published Tue Mar 13, 2018

]]>Collinear wakefield acceleration has been long established as a method capable of generating ultrahigh acceleration gradients. Because of the success on this front, recently, more efforts have shifted towards developing methods to raise the transformer ratio (TR). This figure of merit is defined as ...

[Phys. Rev. Lett. 120, 114801] Published Tue Mar 13, 2018

]]>It seems natural to assume that defects at mineral surfaces critically influence interfacial processes such as the dissolution and growth of minerals in water. The experimental verification of this claim, however, is challenging and requires real-space methods with utmost spatial resolution, such as...

[Phys. Rev. Lett. 120, 116101] Published Tue Mar 13, 2018

]]>A previously unseen macroscopic degeneracy is predicted in spin-1/2 kagome antiferromagnets, explaining the presence and absence of spin liquids in various regions of the phase diagram.

[Phys. Rev. Lett. 120, 117202] Published Tue Mar 13, 2018

]]>Fundamental research and technological applications of topological insulators are hindered by the rarity of materials exhibiting a robust topologically nontrivial phase, especially in two dimensions. Here, by means of extensive first-principles calculations, we propose a novel quantum spin Hall insu...

[Phys. Rev. Lett. 120, 117701] Published Tue Mar 13, 2018

]]>A new and more flexible neutron interferometer design relies on the moiré effect, in which two periodic patterns are combined to give a longer-period pattern.

[Phys. Rev. Lett. 120, 113201] Published Mon Mar 12, 2018

]]>Using exact quantum Monte Carlo calculations, we examine the interplay between localization of electronic states driven by many-body correlations and that by randomness in a two-dimensional system featuring linearly vanishing density of states at the Fermi level. A novel disorder-induced nonmagnetic...

[Phys. Rev. Lett. 120, 116601] Published Mon Mar 12, 2018

]]>We investigate dynamical three-body correlations in the Bose gas during the earliest stages of evolution after a quench to the unitary regime. The development of few-body correlations is theoretically observed by determining the two- and three-body contacts. We find that the growth of three-body cor...

[Phys. Rev. Lett. 120, 100401] Published Fri Mar 09, 2018

]]>We present an experimental study of flux- and gate-tunable nanowire transmons with state-of-the-art relaxation time allowing quantitative extraction of flux and charge noise coupling to the Josephson energy. We evidence coherence sweet spots for charge, tuned by voltage on a proximal side gate, wher...

[Phys. Rev. Lett. 120, 100502] Published Fri Mar 09, 2018

]]>We show that a quantum Szilard engine containing many bosons with *attractive* interactions enhances the conversion between information and work. Using an *ab initio* approach to the full quantum-mechanical many-body problem, we find that the average work output increases significantly for a larger numb...

[Phys. Rev. Lett. 120, 100601] Published Fri Mar 09, 2018

]]>We use 413 weeks of publicly available Fermi Pass 8 gamma-ray data combined with recently developed galaxy group catalogs to search for evidence of dark matter annihilation in extragalactic halos. In our study, we use luminosity-based mass estimates and mass-to-concentration relations to infer the $J$...

[Phys. Rev. Lett. 120, 101101] Published Fri Mar 09, 2018

]]>Near the horizon, the obvious symmetries of a black hole spacetime—the horizon-preserving diffeomorphisms—are enhanced to a larger symmetry group with a three-dimensional Bondi-Metzner-Sachs algebra. Using dimensional reduction and covariant phase space techniques, I investigate this augmented symme...

[Phys. Rev. Lett. 120, 101301] Published Fri Mar 09, 2018

]]>The energy-energy correlation between pairs of hadrons separated by a fixed angle is, for the first time, computed analytically at next-to-leading-order.

[Phys. Rev. Lett. 120, 102001] Published Fri Mar 09, 2018

]]>The azimuthal anisotropy coefficient ${v}_{2}$ of prompt ${D}^{0}$, ${D}^{+}$, ${D}^{*+}$, and ${D}_{s}^{+}$ mesons was measured in midcentral (30%–50% centrality class) Pb-Pb collisions at a center-of-mass energy per nucleon pair $\sqrt{{s}_{NN}}=5.02\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{TeV}$, with the ALICE detector at the LHC. The $D$ mesons were reconstructed via their hadronic decay...

[Phys. Rev. Lett. 120, 102301] Published Fri Mar 09, 2018

]]>Atomic motion dynamics during structural changes or chemical reactions have been visualized by pico- and femtosecond pulsed electron beams via ultrafast electron diffraction and microscopy. Imaging the even faster dynamics of electrons in atoms, molecules, and solids requires electron pulses with su...

[Phys. Rev. Lett. 120, 103203] Published Fri Mar 09, 2018

]]>Ultrafast two-dimensional infrared (2DIR) spectra of the ${\mathrm{N}}_{2}\mathrm{O}$ ${\nu}_{3}$ mode in moderately dense ${\mathrm{SF}}_{6}$ gas exhibit complex line shapes with diagonal and antidiagonal features in contrast to condensed phase vibrational 2DIR spectroscopy. Observed spectra for this quasifree rotor system are well captured by a m...

[Phys. Rev. Lett. 120, 103401] Published Fri Mar 09, 2018

]]>An analysis of the generalized Lévy walk model unlocks a new possible scenario of weak ergodicity-breaking in complex transport phenomena.

[Phys. Rev. Lett. 120, 104501] Published Fri Mar 09, 2018

]]>The unique properties of topological semimetals have strongly driven efforts to seek for new topological phases and related materials. Here, we identify a critical condition for the existence of intersecting nodal rings (INRs) in symmorphic crystals, and further classify all possible kinds of INRs w...

[Phys. Rev. Lett. 120, 106403] Published Fri Mar 09, 2018

]]>We study Thouless pumping out of the adiabatic limit. Our findings show that despite its topological nature, this phenomenon is not generically robust to nonadiabatic effects. Indeed, we find that the Floquet diagonal ensemble value of the pumped charge shows a deviation from the topologically quant...

[Phys. Rev. Lett. 120, 106601] Published Fri Mar 09, 2018

]]>We demonstrate strong anisotropic spin-orbit interaction (SOI) in graphene induced by monolayer ${\mathrm{WS}}_{2}$. Direct comparison between graphene-monolayer ${\mathrm{WS}}_{2}$ and graphene-bulk ${\mathrm{WS}}_{2}$ systems in magnetotransport measurements reveals that monolayer transition metal dichalcogenide can induce much stronger SOI tha...

[Phys. Rev. Lett. 120, 106802] Published Fri Mar 09, 2018

]]>We predict a strong enhancement of the critical temperature in a conventional Bardeen-Cooper-Schrieffer (BCS) superconductor in the presence of a bosonic condensate of exciton polaritons. The effect depends strongly on the ratio of the cutoff frequencies for phonon and exciton-polariton mediated BCS...

[Phys. Rev. Lett. 120, 107001] Published Fri Mar 09, 2018

]]>We address the question about the origin of the $\frac{1}{2}({e}^{2}/h)$ conductance plateau observed in a recent experiment on an integer quantum Hall (IQH) film covered by a superconducting (SC) film. Since one-dimensional (1D) chiral Majorana fermions on the edge of the above device can give rise to the half qua...

[Phys. Rev. Lett. 120, 107002] Published Fri Mar 09, 2018

]]>We exploit an intense terahertz magnetic near field combined with femtosecond laser excitation to break the symmetry of photoinduced spin reorientation paths in ${\mathrm{ErFeO}}_{3}$. We succeed in aligning macroscopic magnetization reaching up to 80% of total magnetization in the sample to selectable orientations...

[Phys. Rev. Lett. 120, 107202] Published Fri Mar 09, 2018

]]>We investigated the ultrafast terahertz (THz) nonlinearity in a monolayer graphene under the strong magnetic field using THz pump-THz probe spectroscopy. An ultrafast suppression of the Faraday rotation associated with inter-Landau level (LL) transitions is observed, reflecting the Dirac electron ch...

[Phys. Rev. Lett. 120, 107401] Published Fri Mar 09, 2018

]]>A theory is developed for the emission noise at frequency $\nu $ in a quantum dot in the presence of Coulomb interactions and asymmetric couplings to the reservoirs. We give an analytical expression for the noise in terms of the various transmission amplitudes. Including the inelastic scattering contribu...

[Phys. Rev. Lett. 120, 107702] Published Fri Mar 09, 2018

]]>The valence band maximum in transition metal dicalcogenides is tuned by applying a transverse electric field to the material.

[Phys. Rev. Lett. 120, 107703] Published Fri Mar 09, 2018

]]>Experiments on confined droplets of the nematic liquid crystal 5CB have questioned long-established bounds imposed on the elastic free energy of nematic systems. This elasticity, which derives from molecular alignment within nematic systems, is quantified through a set of moduli which can be difficu...

[Phys. Rev. Lett. 120, 107801] Published Fri Mar 09, 2018

]]>Mathematical analysis of the two-dimensional layout of a city reveals much about its three-dimensional structure and provides useful measures of the urban heat island effect.

[Phys. Rev. Lett. 120, 108701] Published Fri Mar 09, 2018

]]>The Large Hadron Collider (LHC) is sensitive to new heavy gauge bosons that produce narrow peaks in the dilepton invariant mass spectrum up to about ${m}_{{Z}^{\prime}}\sim 5\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{TeV}$ ${Z}^{\prime}\mathrm{s}$ that are too heavy to produce directly can reveal their presence through interference with standard model dilepton production. We show t...

[Phys. Rev. Lett. 120, 101801] Published Thu Mar 08, 2018

]]>A key question concerning the three-body fragmentation of polyatomic molecules is the distinction of sequential and concerted mechanisms, i.e., the stepwise or simultaneous cleavage of bonds. Using laser-driven fragmentation of OCS into ${\mathrm{O}}^{+}+{\mathrm{C}}^{+}+{\mathrm{S}}^{+}$ and employing coincidence momentum imaging, we demonst...

[Phys. Rev. Lett. 120, 103001] Published Thu Mar 08, 2018

]]>We describe a broadly applicable experimental proposal to search for the violation of local Lorentz invariance (LLI) with atomic systems. The new scheme uses dynamic decoupling and can be implemented in current atomic clock experiments, with both single ions and arrays of neutral atoms. Moreover, th...

[Phys. Rev. Lett. 120, 103202] Published Thu Mar 08, 2018

]]>The first direct experimental measurements of the scattering of a millimeter-wave beam by plasma blobs in a simple magnetized torus are reported. The wavelength of the beam is comparable to the characteristic size of the blob. *In situ* Langmuir probe measurements show that fluctuations of the electro...

[Phys. Rev. Lett. 120, 105001] Published Thu Mar 08, 2018

]]>Long wavelength vibrational modes in the ferromagnetic semiconductor ${\mathrm{Ga}}_{0.91}{\mathrm{Mn}}_{0.09}\mathrm{As}$ are investigated using time resolved x-ray diffraction. At room temperature, we measure oscillations in the x-ray diffraction intensity corresponding to coherent vibrational modes with well-defined wavelengths. When ...

[Phys. Rev. Lett. 120, 105501] Published Thu Mar 08, 2018

]]>Nonequilibrium chemical redistribution in open systems submitted to external forces, such as particle irradiation, leads to changes in the structural properties of the material, potentially driving the system to failure. Such redistribution is controlled by the complex interplay between the producti...

[Phys. Rev. Lett. 120, 106101] Published Thu Mar 08, 2018

]]>When a $d$-dimensional quantum system is subjected to a periodic drive, it may be treated as a ($d+1$)-dimensional system, where the extra dimension is a synthetic one. This approach, however, affords only a limited level of control of the effective potential along the synthetic direction. In this work,...

[Phys. Rev. Lett. 120, 106402] Published Thu Mar 08, 2018

]]>We study chemically gated bilayer graphene using scanning tunneling microscopy and spectroscopy complemented by tight-binding calculations. Gating is achieved by intercalating Cs between bilayer graphene and Ir(111), thereby shifting the conduction band minima below the chemical potential. Scatterin...

[Phys. Rev. Lett. 120, 106801] Published Thu Mar 08, 2018

]]>The absence of the negative sign problem in quantum Monte Carlo simulations of spin and fermion systems has different origins. World-line based algorithms for spins require positivity of matrix elements whereas auxiliary field approaches for fermions depend on symmetries such as particle-hole symmet...

[Phys. Rev. Lett. 120, 107201] Published Thu Mar 08, 2018

]]>Entanglement between light and matter combines the advantage of long distance transmission of photonic qubits with the storage and processing capabilities of atomic qubits. To distribute photonic states efficiently over long distances several schemes to encode qubits have been investigated—time-bin ...

[Phys. Rev. Lett. 120, 100501] Published Wed Mar 07, 2018

]]>We present an in principle lossless sorter for radial modes of light, using accumulated Gouy phases. The experimental setups have been found by a computer algorithm, and can be intuitively understood in a geometric way. Together with the ability to sort angular-momentum modes, we now have access to ...

[Phys. Rev. Lett. 120, 103601] Published Wed Mar 07, 2018

]]>We investigate the role of the quartic anharmonicity in the lattice dynamics and thermal transport of the type-I clathrate ${\mathrm{Ba}}_{8}{\mathrm{Ga}}_{16}{\mathrm{Ge}}_{30}$ based on *ab initio* self-consistent phonon calculations. We show that the strong quartic anharmonicity of rattling guest atoms causes the hardening of vibrational fre...

[Phys. Rev. Lett. 120, 105901] Published Wed Mar 07, 2018

]]>van der Waals heterostructures (VDWHs) exhibit rich properties and thus has potential for applications, and charge transfer between different layers in a heterostructure often dominates its properties and device performance. It is thus critical to reveal and understand the charge transfer effects in...

[Phys. Rev. Lett. 120, 106401] Published Wed Mar 07, 2018

]]>Researchers set a new record in atomic clock precision by using spectroscopic imaging to reduce frequency variations in a strontium optical lattice clock.

[Phys. Rev. Lett. 120, 103201] Published Mon Mar 05, 2018

]]>We present results from a three-dimensional particle-in-cell simulation of plasma turbulence, resembling the plasma conditions found at kinetic scales of the solar wind. The spectral properties of the turbulence in the subion range are consistent with theoretical expectations for kinetic Alfvén wave...

[Phys. Rev. Lett. 120, 105101] Published Mon Mar 05, 2018

]]>We develop a Landauer-Büttiker theory of entropy evolution in time-dependent, strongly coupled electron systems. The formalism naturally avoids the problem of the system-bath distinction by defining the entropy current in the attached leads. This current can then be used to infer changes of the entr...

[Phys. Rev. Lett. 120, 107701] Published Mon Mar 05, 2018

]]>It has been shown that single-particle wave functions, of both photons and electrons, can be created with a phase vortex, i.e., an intrinsic orbital angular momentum (OAM). A recent experiment has claimed similar success using neutrons [C. W. Clark *et al.*, Nature, **525**, 504 (2015)]. We show that the...

[Phys. Rev. Lett. 120, 090402] Published Fri Mar 02, 2018

]]>We present a continuous variable tomography scheme that reconstructs the Husimi $Q$ function (Wigner function) by Lagrange interpolation, using measurements of the $Q$ function (Wigner function) at the *Padua* points, conjectured to be optimal sampling points for two dimensional reconstruction. Our approa...

[Phys. Rev. Lett. 120, 090501] Published Fri Mar 02, 2018

]]>For classical ballistic transport in a multiterminal geometry, we derive a universal trade-off relation between total dissipation and the precision, at which particles are extracted from individual reservoirs. Remarkably, this bound becomes significantly weaker in the presence of a magnetic field br...

[Phys. Rev. Lett. 120, 090601] Published Fri Mar 02, 2018

]]>We compute the leading-color contributions to five-gluon scattering at two loops in massless QCD. The integrands of all independent helicity amplitudes are evaluated using $d$-dimensional generalized unitarity cuts and finite field reconstruction techniques. Numerical evaluation of the integral basis ...

[Phys. Rev. Lett. 120, 092001] Published Fri Mar 02, 2018

]]>We propose an experimentally feasible method for enhancing the atom-field coupling as well as the ratio between this coupling and dissipation (i.e., cooperativity) in an optical cavity. It exploits optical parametric amplification to exponentially enhance the atom-cavity interaction and, hence, the ...

[Phys. Rev. Lett. 120, 093601] Published Fri Mar 02, 2018

]]>We present and analyze a method where parametric (two-photon) driving of a cavity is used to exponentially enhance the light-matter coupling in a generic cavity QED setup, with time-dependent control. Our method allows one to enhance weak-coupling systems, such that they enter the strong coupling re...

[Phys. Rev. Lett. 120, 093602] Published Fri Mar 02, 2018

]]>The structure of a strong collisional shock front forming in a plasma is directly probed for the first time in laser-driven gas-jet experiments. Thomson scattering of a 526.5 nm probe beam was used to diagnose temperature and ion velocity distribution in a strong shock ($M\sim 11$) propagating through a l...

[Phys. Rev. Lett. 120, 095001] Published Fri Mar 02, 2018

]]>Heat dissipation in integrated nanoscale devices is a major issue that requires the development of nanoscale temperature probes. Here, we report the implementation of a method that combines electron energy gain and loss spectroscopy to provide a direct measurement of the local temperature in the nan...

[Phys. Rev. Lett. 120, 095901] Published Fri Mar 02, 2018

]]>We study the impact of quenched disorder (random exchange couplings or site dilution) on easy-plane pyrochlore antiferromagnets. In the clean system, order by disorder selects a magnetically ordered state from a classically degenerate manifold. In the presence of randomness, however, different order...

[Phys. Rev. Lett. 120, 097204] Published Fri Mar 02, 2018

]]>Three new transistors for spin-based currents may lead to a new type of circuitry that is faster and more efficient than traditional electronics.

[Phys. Rev. Lett. 120, 097205] Published Fri Mar 02, 2018

]]>We study exciton polaritons in a two-dimensional Lieb lattice of micropillars. The energy spectrum of the system features two flat bands formed from $S$ and ${P}_{x,y}$ photonic orbitals, into which we trigger bosonic condensation under high power excitation. The symmetry of the orbital wave functions combin...

[Phys. Rev. Lett. 120, 097401] Published Fri Mar 02, 2018

]]>Three new transistors for spin-based currents may lead to a new type of circuitry that is faster and more efficient than traditional electronics.

[Phys. Rev. Lett. 120, 097702] Published Fri Mar 02, 2018

]]>We investigate the effect of stress fluctuations on the stochastic dynamics of an inclusion embedded in a viscous gel. We show that, in nonequilibrium systems, stress fluctuations give rise to an effective attraction towards the boundaries of the confining domain, which is reminiscent of an active C...

[Phys. Rev. Lett. 120, 098001] Published Fri Mar 02, 2018

]]>[Phys. Rev. Lett. 120, 099901] Published Fri Mar 02, 2018

]]>A laser-based setup can be used to perform x-ray spectroscopy with a precision rivaling that of experiments at large-scale synchrotron facilities.

[Phys. Rev. Lett. 120, 093002] Published Thu Mar 01, 2018

]]>We present an experimental demonstration of converting a microwave field to an optical field via frequency mixing in a cloud of cold ${}^{87}\mathrm{Rb}$ atoms, where the microwave field strongly couples to an electric dipole transition between Rydberg states. We show that the conversion allows the phase informatio...

[Phys. Rev. Lett. 120, 093201] Published Thu Mar 01, 2018

]]>