The dispersive interaction of atoms and a far-detuned light field allows nondestructive imaging of the density oscillations in Bose-Einstein condensates. Starting from a ground state condensate, we investigate how the measurement backaction leads to squeezing and entanglement of the quantized densit…

[Phys. Rev. Lett. 115, 060401] Published Mon Aug 03, 2015

]]>Dark matter (DM) may be a thermal relic that annihilates into heavier states in the early universe. This forbidden DM framework accommodates a wide range of DM masses from keV to weak scales. An exponential hierarchy between the DM mass and the weak scale follows from the exponential suppression of …

[Phys. Rev. Lett. 115, 061301] Published Mon Aug 03, 2015

]]>We report on a search for charged massive resonances decaying to top ($t$) and bottom ($b$) quarks in the full data set of proton-antiproton collisions at a center-of-mass energy of $\sqrt{s}=1.96\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{TeV}$ collected by the CDF II detector at the Tevatron, corresponding to an integrated luminosity of $9.5\text{\hspace{0.17em}}\text{\hspace{0.17em}}{\mathrm{fb}}^{-1}$. No s…

[Phys. Rev. Lett. 115, 061801] Published Mon Aug 03, 2015

]]>We compute the electric dipole moment ${d}_{n}$ of the neutron from a fully dynamical simulation of lattice QCD with $2+1$ flavors of clover fermions and nonvanishing $\theta $ term. The latter is rotated into a pseudoscalar density in the fermionic action using the axial anomaly. To make the action real, the vacuum…

[Phys. Rev. Lett. 115, 062001] Published Mon Aug 03, 2015

]]>We study the motion of droplets in a confined, micrometric geometry, by focusing on the lubrication film between a droplet and a wall. When capillary forces dominate, the lubrication film thickness evolves nonlinearly with the capillary number due to the viscous dissipation between the meniscus and …

[Phys. Rev. Lett. 115, 064501] Published Mon Aug 03, 2015

]]>Laser pulses that have passed through a carbon-nanotube foam are ideally suited to accelerate ions.

[Phys. Rev. Lett. 115, 064801] Published Mon Aug 03, 2015

]]>Density-functional-theory calculations of twin-boundary energies in hexagonal close packed metals reveal anomalously low values for elemental Tc and Re, which can be lowered further by alloying with solutes that reduce the electron per atom ratio. The anomalous behavior is linked to atomic geometrie…

[Phys. Rev. Lett. 115, 065501] Published Mon Aug 03, 2015

]]>An improved take on an existing approach provides intramolecular imaging of molecules adsorbed on a solid surface at room temperature.

[Phys. Rev. Lett. 115, 066101] Published Mon Aug 03, 2015

]]>Four-point measurements using a multitip scanning tunneling microscope are carried out in order to determine surface and step conductivities on Si(111) surfaces. In a first step, distance-dependent four-point measurements in the linear configuration are used in combination with an analytical three-l…

[Phys. Rev. Lett. 115, 066801] Published Mon Aug 03, 2015

]]>Epitaxial $\mathrm{Ho}/\mathrm{Nb}/\mathrm{Ho}$ and $\mathrm{Dy}/\mathrm{Nb}/\mathrm{Dy}$ superconducting spin valves show a reversible change in the zero-field critical temperature ($\mathrm{\Delta}{T}_{c0}$) of $\sim 400\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{mK}$ and an infinite magnetoresistance on changing the relative magnetization of the Ho or Dy layers. Unlike transition-metal superconducting spin valves, which s…

[Phys. Rev. Lett. 115, 067201] Published Mon Aug 03, 2015

]]>We suggest a technique for constructing lower (existence) bounds for the fault-tolerant threshold to scalable quantum computation applicable to degenerate quantum codes with sublinear distance scaling. We give explicit analytic expressions combining probabilities of erasures, depolarizing errors, an…

[Phys. Rev. Lett. 115, 050502] Published Fri Jul 31, 2015

]]>We present an approach to the calculation of arbitrary spectral, thermal, and excited state properties within the full configuration interaction quzantum Monte Carlo framework. This is achieved via an unbiased projection of the Hamiltonian eigenvalue problem into a space of stochastically sampled Kr…

[Phys. Rev. Lett. 115, 050603] Published Fri Jul 31, 2015

]]>We study a spherical gravitational collapse of a small mass in higher-derivative and ghost-free theories of gravity. By boosting a solution of linearized equations for a static point mass in such theories we obtain in the Penrose limit the gravitational field of an ultrarelativistic particle. Taking…

[Phys. Rev. Lett. 115, 051102] Published Fri Jul 31, 2015

]]>Experimental evidence has recently put the validity of the Porter-Thomas distribution (PTD) for partial neutron widths into question. We identify two terms in the effective Hamiltonian that violate orthogonal invariance (the basis for the PTD). Both are due to the coupling to the decay channels. We …

[Phys. Rev. Lett. 115, 052501] Published Fri Jul 31, 2015

]]>Ultrarelativistic-energy electron ring structures have been observed from laser-wakefield acceleration experiments in the blowout regime. These electron rings had 170–280 MeV energies with 5%–25% energy spread and $\sim 10\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{pC}$ of charge and were observed over a range of plasma densities and compositions.…

[Phys. Rev. Lett. 115, 055004] Published Fri Jul 31, 2015

]]>Wood is a multiscale material exhibiting a complex viscoplastic response. We study avalanches in small wood samples in compression. “Woodquakes” measured by acoustic emission are surprisingly similar to earthquakes and crackling noise in rocks and laboratory tests on brittle materials. Both the dist…

[Phys. Rev. Lett. 115, 055501] Published Fri Jul 31, 2015

]]>The Wiedemann-Franz law, connecting the electronic thermal conductivity to the electrical conductivity of a disordered metal, is generally found to be well satisfied even when electron-electron ($e\text{\u2212}e$) interactions are strong. In ultraclean conductors in the hydrodynamic regime, however, large deviati…

[Phys. Rev. Lett. 115, 056603] Published Fri Jul 31, 2015

]]>The magnetic response of antiferromagnetic ${\mathrm{CsO}}_{2}$, coming from the $p$-orbital $S=1/2$ spins of anionic ${\mathrm{O}}_{2}^{-}$ molecules, is followed by ${}^{133}\mathrm{Cs}$ nuclear magnetic resonance across the structural phase transition occurring at ${T}_{s1}=61\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{K}$ on cooling. Above ${T}_{s1}$, where spins form a square magnetic lattice, we observe…

[Phys. Rev. Lett. 115, 057205] Published Fri Jul 31, 2015

]]>The quantum anomalous Hall (QAH) effect is predicted to possess, at a zero magnetic field, chiral edge channels that conduct a spin polarized current without dissipation. While edge channels have been observed in previous experimental studies of the QAH effect, their dissipationless nature at a zero…

[Phys. Rev. Lett. 115, 057206] Published Fri Jul 31, 2015

]]>Based on a given time series, data-driven Langevin modeling aims to construct a low-dimensional dynamical model of the underlying system. When dealing with physical data as provided by, e.g., all-atom molecular dynamics simulations, effects due to small damping may be important to correctly describe…

[Phys. Rev. Lett. 115, 050602] Published Thu Jul 30, 2015

]]>Mergers of binary black holes from dense star clusters may be promising sources of gravitational waves.

[Phys. Rev. Lett. 115, 051101] Published Thu Jul 30, 2015

]]>Stimulated Raman scattering from multiple laser beams arranged in a cone sharing a common daughter wave is investigated for inertial confinement fusion (ICF) conditions in a inhomogeneous plasma. It is found that the shared electron plasma wave (EPW) process, where the lasers collectively drive the …

[Phys. Rev. Lett. 115, 055003] Published Thu Jul 30, 2015

]]>We investigate magnetotransport properties in a single crystal of pyrochore-type ${\mathrm{Nd}}_{2}{\mathrm{Ir}}_{2}{\mathrm{O}}_{7}$. The metallic conduction is observed on the antiferromagnetic domain walls of the all-in–all-out-type Ir $5d$ moment ordered insulating bulk state that can be finely controlled by an external magnetic field along…

[Phys. Rev. Lett. 115, 056402] Published Thu Jul 30, 2015

]]>Enhancement of Gilbert damping in polycrystalline cobalt thin-film multilayers of various thicknesses, overlayered with copper or iridium, was studied in order to understand the role of local interface structure in spin pumping. X-ray diffraction indicates that cobalt films less than 6 nm thick have…

[Phys. Rev. Lett. 115, 056601] Published Thu Jul 30, 2015

]]>We predict, theoretically, the existence of the anomalous Hall effect when a tunneling current flows through a tunnel junction in which only one of the electrodes is magnetic. The interfacial spin-orbit coupling present in the barrier region induces a spin-dependent momentum filtering in the directi…

[Phys. Rev. Lett. 115, 056602] Published Thu Jul 30, 2015

]]>The modulation of the Gilbert damping constant $\alpha $ in (Ga,Mn)As by the application of an electric field is detected by ferromagnetic resonance measurements, where $\alpha $ increases with decreasing hole concentration. The smaller modulation of other magnetic parameters, such as magnetic anisotropy fields and…

[Phys. Rev. Lett. 115, 057204] Published Thu Jul 30, 2015

]]>We suggest that electromagnetic chirality, generally displayed by 3D or 2D complex chiral structures, can occur in 1D patterned composites whose components are achiral. This feature is highly unexpected in a 1D system which is geometrically achiral since its mirror image can always be superposed ont…

[Phys. Rev. Lett. 115, 057401] Published Thu Jul 30, 2015

]]>We give two strengthenings of an inequality for the quantum conditional mutual information of a tripartite quantum state recently proved by Fawzi and Renner, connecting it with the ability to reconstruct the state from its bipartite reductions. Namely, we show that the conditional mutual information…

[Phys. Rev. Lett. 115, 050501] Published Wed Jul 29, 2015

]]>The Dark Energy Survey has generated a map of invisible dark matter by observing tiny gravitationally induced distortions in the images of distant galaxies.

[Phys. Rev. Lett. 115, 051301] Published Wed Jul 29, 2015

]]>The production of ${}^{26}\mathrm{Al}$ in massive stars is sensitive to the ${}^{23}\mathrm{Na}(\alpha ,p){}^{26}\mathrm{Mg}$ cross section. Recent experimental data suggest the currently recommended cross sections are underestimated by a factor of $\sim 40$. We present here differential cross sections for the ${}^{23}\mathrm{Na}(\alpha ,p){}^{26}\mathrm{Mg}$ reaction measured in the energy …

[Phys. Rev. Lett. 115, 052701] Published Wed Jul 29, 2015

]]>${}^{26}\mathrm{Al}$ is an important radioisotope in astrophysics that provides evidence of ongoing nucleosynthesis in the Galaxy. The ${}^{23}\mathrm{Na}(\alpha ,\text{\hspace{0.17em}}p){}^{26}\mathrm{Mg}$ reaction has been identified by a sensitivity study as being one of the most important reactions for the production of ${}^{26}\mathrm{Al}$ in the convective C/Ne burning shell of ma…

[Phys. Rev. Lett. 115, 052702] Published Wed Jul 29, 2015

]]>We demonstrate an efficient high-precision optical spectroscopy technique for single trapped ions with nonclosed transitions. In a double-shelving technique, the absorption of a single photon is first amplified to several phonons of a normal motional mode shared with a cotrapped cooling ion of a dif…

[Phys. Rev. Lett. 115, 053003] Published Wed Jul 29, 2015

]]>Finding conditions that support synchronization is a fertile and active area of research with applications across multiple disciplines. Here we present and analyze a scheme for synchronizing chaotic dynamical systems by transiently *un*coupling them. Specifically, systems coupled only in a fraction of…

[Phys. Rev. Lett. 115, 054101] Published Wed Jul 29, 2015

]]>The interaction between the nuclear quadrupole moment of Arsenic and an electric field gradient can be manipulated by applying an elastic strain to the host silicon crystal. This technique could allow for mechanical tuning of qubits.

[Phys. Rev. Lett. 115, 057601] Published Wed Jul 29, 2015

]]>We present a model to understand quantitatively the role of symmetry breaking in assembly of macromolecular aggregates in general, and the protein shells of viruses in particular. A simple dodecahedral lattice model with a quadrupolar order parameter allows us to demonstrate how symmetry breaking ma…

[Phys. Rev. Lett. 115, 058101] Published Wed Jul 29, 2015

]]>By studying a system of Brownian particles that interact among themselves only through a local velocity-alignment force that does not affect their speed, we show that self-propulsion is not a necessary feature for the flocking transition to take place as long as underdamped particle dynamics can be …

[Phys. Rev. Lett. 115, 058301] Published Wed Jul 29, 2015

]]>We implement the conformal bootstrap program for three dimensional conformal field theories with $\mathcal{N}=2$ supersymmetry and find universal constraints on the spectrum of operator dimensions in these theories. By studying the bounds on the dimension of the first scalar appearing in the operator product ex…

[Phys. Rev. Lett. 115, 051601] Published Tue Jul 28, 2015

]]>The first observation of the ${B}_{s}^{0}\to {\eta}^{\prime}{\eta}^{\prime}$ decay is reported. The study is based on a sample of proton-proton collisions corresponding to $3.0\text{\hspace{0.17em}}\text{\hspace{0.17em}}{\mathrm{fb}}^{-1}$ of integrated luminosity collected with the LHCb detector. The significance of the signal is 6.4 standard deviations. The branching fraction is measured to b…

[Phys. Rev. Lett. 115, 051801] Published Tue Jul 28, 2015

]]>Fully differential two loop calculations in the Standard Model explain the excess of top quarks in the direction of the proton beam in $p\phantom{\rule{0}{0ex}}\overline{p}$ collisions at the Tevatron collider.

[Phys. Rev. Lett. 115, 052001] Published Tue Jul 28, 2015

]]>Magnetic fields can be used to make a normally forbidden molecular transition accessible to optical excitation, using much lower fields than would be needed to achieve the same with the constituent atoms.

[Phys. Rev. Lett. 115, 053001] Published Tue Jul 28, 2015

]]>Raman-assisted hopping may be used to realize the anyon Hubbard model in one-dimensional optical lattices. We propose a feasible scenario that significantly improves the proposal of T. Keilmann *et al.* [Nat. Commun. **2**, 361 (2011)], allowing as well for an exact realization of the two-body hard-core c…

[Phys. Rev. Lett. 115, 053002] Published Tue Jul 28, 2015

]]>We perform phase-space tomography of semiconductor laser dynamics by simultaneous experimental determination of optical intensity, frequency, and population inversion with high temporal resolution. We apply this technique to a laser with delayed feedback, serving as prominent example for high-dimens…

[Phys. Rev. Lett. 115, 053901] Published Tue Jul 28, 2015

]]>We theoretically study and experimentally report the propagation of nonlinear hysteretic torsional pulses in a vertical granular chain made of cm-scale, self-hanged magnetic beads. As predicted by contact mechanics, the torsional coupling between two beads is found to be nonlinear hysteretic. This r…

[Phys. Rev. Lett. 115, 054301] Published Tue Jul 28, 2015

]]>The first self-consistent hybrid particle-in-cell (PIC) simulation of intense proton beam transport and energy deposition in solid-density matter is presented. Both the individual proton slowing-down and the collective beam-plasma interaction effects are taken into account with a new dynamic proton …

[Phys. Rev. Lett. 115, 054801] Published Tue Jul 28, 2015

]]>The production of neutron beams having short temporal duration is studied using ultraintense laser pulses. Laser-accelerated protons are spectrally filtered using a laser-triggered microlens to produce a short duration neutron pulse via nuclear reactions induced in a converter material (LiF). This p…

[Phys. Rev. Lett. 115, 054802] Published Tue Jul 28, 2015

]]>We report on the first layered deuterium-tritium (DT) capsule implosions indirectly driven by a “high-foot” laser pulse that were fielded in depleted uranium hohlraums at the National Ignition Facility. Recently, high-foot implosions have demonstrated improved resistance to ablation-front Rayleigh-T…

[Phys. Rev. Lett. 115, 055001] Published Tue Jul 28, 2015

]]>We present few-femtosecond shadowgraphic snapshots taken during the nonlinear evolution of the plasma wave in a laser wakefield accelerator with transverse synchronized few-cycle probe pulses. These snapshots can be directly associated with the electron density distribution within the plasma wave an…

[Phys. Rev. Lett. 115, 055002] Published Tue Jul 28, 2015

]]>We carry out density-matrix-renormalization group (DMRG) calculations for the problem of one doped hole in a two-leg $t\text{\u2212}J$ ladder. Recent studies have concluded that exotic “Mott” physics—arising from the projection onto the space of no double-occupied sites—is manifest in this model system, leading t…

[Phys. Rev. Lett. 115, 056401] Published Tue Jul 28, 2015

]]>Understanding thermal transport in nanoscale systems presents important challenges to both theory and experiment. In particular, the concept of local temperature at the nanoscale appears difficult to justify. Here, we propose a theoretical approach where we replace the temperature gradient with cont…

[Phys. Rev. Lett. 115, 056801] Published Tue Jul 28, 2015

]]>Thermal activation tends to destroy the magnetic stability of small magnetic nanoparticles, with crucial implications for ultrahigh density recording among other applications. Here we demonstrate that low-blocking-temperature ferromagnetic (FM) Co nanoparticles (${T}_{B}<70\text{\hspace{0.17em}}\text{\hspace{0.17em}}K$) become magnetically stab…

[Phys. Rev. Lett. 115, 057201] Published Tue Jul 28, 2015

]]>The quantum oscillations of the magnetoresistance under ambient and high pressure have been studied for ${\mathrm{WTe}}_{2}$ single crystals, in which extremely large magnetoresistance was discovered recently. By analyzing the Shubnikov–de Haas oscillations, four Fermi surfaces are identified, and two of them are f…

[Phys. Rev. Lett. 115, 057202] Published Tue Jul 28, 2015

]]>A first-principles approach to the construction of concentration-temperature magnetic phase diagrams of metallic alloys is presented. The method employs self-consistent total energy calculations based on the coherent potential approximation for partially ordered and noncollinear magnetic states and …

[Phys. Rev. Lett. 115, 057203] Published Tue Jul 28, 2015

]]>Rubidium atoms in an optical trap have been made to exhibit negative differential conductance, a phenomenon normally found in semiconductor diodes.

[Phys. Rev. Lett. 115, 050601] Published Mon Jul 27, 2015

]]>[Phys. Rev. Lett. 115, 059901] Published Mon Jul 27, 2015

]]>[Phys. Rev. Lett. 115, 059902] Published Mon Jul 27, 2015

]]>We demonstrate the existence of hidden topological angles (HTAs) in a large class of quantum field theories and quantum mechanical systems. HTAs are distinct from theta parameters in the Lagrangian. They arise as *invariant angles* associated with saddle points of the complexified path integral and th…

[Phys. Rev. Lett. 115, 041601] Published Fri Jul 24, 2015

]]>We present the first measurement for helium atoms of the tune-out wavelength at which the atomic polarizability vanishes. We utilize a novel, highly sensitive technique for precisely measuring the effect of variations in the trapping potential of confined metastable ($2{}^{3}{S}_{1}$) helium atoms illuminated b…

[Phys. Rev. Lett. 115, 043004] Published Fri Jul 24, 2015

]]>We study collisional heating in a cold ${}^{7}\mathrm{Li}\text{\u2212}{}^{87}\mathrm{Rb}$ mixture near a broad Feshbach resonance at 661 G. At the high field slope of the resonance, we find an enhanced three-body recombination rate that we interpret as a heteronuclear Efimov resonance. With improved Feshbach spectroscopy of two further reso…

[Phys. Rev. Lett. 115, 043201] Published Fri Jul 24, 2015

]]>A new type of interferometer, sensitive to the phases of an atomic spin wave and a light wave is experimentally demonstrated.

[Phys. Rev. Lett. 115, 043602] Published Fri Jul 24, 2015

]]>An ice coating can halve the drag of an object moving in water by reducing the turbulent wake behind it.

[Phys. Rev. Lett. 115, 044501] Published Fri Jul 24, 2015

]]>We show that the one-particle density matrix $\rho $ can be used to characterize the interaction-driven many-body localization transition in closed fermionic systems. The natural orbitals (the eigenstates of $\rho $) are localized in the many-body localized phase and spread out when one enters the delocalized p…

[Phys. Rev. Lett. 115, 046603] Published Fri Jul 24, 2015

]]>We explore the microwave radiation emitted from a biased double quantum dot due to the inelastic tunneling of single charges. Radiation is detected over a broad range of detuning configurations between the dot energy levels, with pronounced maxima occurring in resonance with a capacitively coupled t…

[Phys. Rev. Lett. 115, 046802] Published Fri Jul 24, 2015

]]>We present the first experimental observation of a topological transition in a non-Hermitian system. In contrast to standard methods for examining topological properties, which involve probing edge (or surface) states, we monitor the topological transition by employing bulk dynamics only. The system…

[Phys. Rev. Lett. 115, 040402] Published Thu Jul 23, 2015

]]>Several recent experiments have established by measuring the Mandel $Q$ parameter that the number of Rydberg excitations in ultracold gases exhibits sub-Poissonian statistics. This effect is attributed to the Rydberg blockade that occurs due to the strong interatomic interactions between highly excite…

[Phys. Rev. Lett. 115, 043002] Published Thu Jul 23, 2015

]]>Researchers manipulate atomic qubits individually in a three-dimensional optical lattice.

[Phys. Rev. Lett. 115, 043003] Published Thu Jul 23, 2015

]]>${\mathrm{Na}}_{4}{\mathrm{Ir}}_{3}{\mathrm{O}}_{8}$ is a unique case of a hyperkagome 3D corner sharing triangular lattice that can be decorated with quantum spins. It has spurred a lot of theoretical interest as a spin liquid candidate. We present a comprehensive set of NMR data taken on both the ${}^{23}\mathrm{Na}$ and ${}^{17}\mathrm{O}$ sites. We show that disordered …

[Phys. Rev. Lett. 115, 047201] Published Thu Jul 23, 2015

]]>Iron pnictides and selenides display a variety of unusual magnetic phases originating from the interplay between electronic, orbital, and lattice degrees of freedom. Using powder inelastic neutron scattering on the two-leg ladder ${\mathrm{BaFe}}_{2}{\mathrm{Se}}_{3}$, we fully characterize the static and dynamic spin correlatio…

[Phys. Rev. Lett. 115, 047401] Published Thu Jul 23, 2015

]]>New mechanisms for achieving direct electric field control of ferromagnetism are highly desirable in the development of functional magnetic interfaces. To that end, we have probed the electric field dependence of the emergent ferromagnetic layer at ${\mathrm{CaRuO}}_{3}/{\mathrm{CaMnO}}_{3}$ interfaces in bilayers fabricated on ${\dots}_{}$

[Phys. Rev. Lett. 115, 047601] Published Thu Jul 23, 2015

]]>[Phys. Rev. Lett. 115, 049101] Published Thu Jul 23, 2015

]]>[Phys. Rev. Lett. 115, 049102] Published Thu Jul 23, 2015

]]>The paucity of observed supermassive black hole binaries (SMBHBs) may imply that the gravitational wave background (GWB) from this population is anisotropic, rendering existing analyses suboptimal. We present the first constraints on the angular distribution of a nanohertz stochastic GWB from circul…

[Phys. Rev. Lett. 115, 041101] Published Wed Jul 22, 2015

]]>We present a measurement of the fundamental parameter of the standard model, the weak mixing angle ${\mathrm{sin}}^{2}{\theta}_{\text{eff}}^{\ell}$ which determines the relative strength of weak and electromagnetic interactions, in $p\overline{p}\to Z/{\gamma}^{*}\to {e}^{+}{e}^{-}$ events at a center of mass energy of 1.96 TeV, using data corresponding to $9.7\text{\hspace{0.17em}}\text{\hspace{0.17em}}{\mathrm{fb}}^{-1}$ of integ…

[Phys. Rev. Lett. 115, 041801] Published Wed Jul 22, 2015

]]>The presence of a weak second-harmonic field in an intense-laser ionization experiment affects the momentum-resolved electron yield, depending on the relative phase between the $\omega $ and the $2\omega $ component. The proposed two-color “phase-of-the-phase spectroscopy” quantifies for each final electron momentu…

[Phys. Rev. Lett. 115, 043001] Published Wed Jul 22, 2015

]]>We investigate the efficient generation of low-divergence high-order harmonics driven by waveform-optimized laser pulses in a gas-filled hollow waveguide. The drive waveform is obtained by synthesizing two-color laser pulses, optimized such that highest harmonic yields are emitted from each atom. Op…

[Phys. Rev. Lett. 115, 043901] Published Wed Jul 22, 2015

]]>We experimentally demonstrate the existence of nondispersive solitary waves associated with a $2\pi $ phase rotation in a strongly multimode ring semiconductor laser with coherent forcing. Similarly to Bloch domain walls, such structures host a chiral charge. The numerical simulations based on a set of e…

[Phys. Rev. Lett. 115, 043902] Published Wed Jul 22, 2015

]]>We have performed simulations of the principal deuterium Hugoniot curve using coupled electron-ion Monte Carlo calculations. Using highly accurate quantum Monte Carlo methods for the electrons, we study the region of maximum compression along the Hugoniot, where the system undergoes a continuous tra…

[Phys. Rev. Lett. 115, 045301] Published Wed Jul 22, 2015

]]>We study the emergence of a fragmented state in a strongly interacting Fermi gas subject to a tunable disorder. We investigate its properties using a combination of high-resolution *in situ* imaging and conductance measurements. The fragmented state exhibits saturated density modulations, a strongly r…

[Phys. Rev. Lett. 115, 045302] Published Wed Jul 22, 2015

]]>We predict the existence of a topological superradiant state in a two-component degenerate Fermi gas in a cavity. The superradiant light generation in the transversely driven cavity mode induces a cavity-assisted spin-orbit coupling and opens a bulk gap at half filling. This mechanism can simultaneo…

[Phys. Rev. Lett. 115, 045303] Published Wed Jul 22, 2015

]]>We design an interaction-driven topological insulator for fermionic cold atoms in an optical lattice; that is, we pose the question of whether we can realize in a continuous space a spontaneous symmetry breaking induced by the interatom interaction into a topological Chern insulator. Such a state, s…

[Phys. Rev. Lett. 115, 045304] Published Wed Jul 22, 2015

]]>We probe the viscous relaxation of structured liquid droplets in the partial wetting regime using a diblock copolymer system. The relaxation time of the droplets is measured after a step change in temperature as a function of three tunable parameters: droplet size, equilibrium contact angle, and the…

[Phys. Rev. Lett. 115, 046103] Published Wed Jul 22, 2015

]]>The electron-glass dynamics of Anderson-localized GeSbTe films is dramatically slowed down following a brief infrared illumination that increases the system carrier concentration (and thus its conductance). These results demonstrate that the dynamics exhibited by electron glasses is more sensitive t…

[Phys. Rev. Lett. 115, 046601] Published Wed Jul 22, 2015

]]>Tungsten-ditelluride cleaves easily into atomically thin layers, but its electrons conduct almost isotropically, suggesting a rare case of good charge conduction across weak mechanical bonds.

[Phys. Rev. Lett. 115, 046602] Published Wed Jul 22, 2015

]]>The search in two-dimensional condensed matter systems of Rashba-type spin-polarized electronic states is aimed by the possibility to control and manipulate the spin orientation. In this Letter, for the first time, we report on the experimental evidence of a Rashba-type spin splitting in the $n=1$ ima…

[Phys. Rev. Lett. 115, 046801] Published Wed Jul 22, 2015

]]>[Phys. Rev. Lett. 115, 049901] Published Wed Jul 22, 2015

]]>We show how the phase profile of Bose-Einstein condensates can be engineered through its interaction with localized Rydberg excitations. The interaction is made controllable and long range by off-resonantly coupling the condensate to another Rydberg state with laser light. Our technique allows the m…

[Phys. Rev. Lett. 115, 040401] Published Tue Jul 21, 2015

]]>Universal properties of the statistics of stochastic efficiency for mesoscopic time-reversal symmetry broken energy transducers are revealed in the Gaussian approximation. We also discuss how the second law of thermodynamics restricts the statistics of stochastic efficiency. The tight-coupling limit…

[Phys. Rev. Lett. 115, 040601] Published Tue Jul 21, 2015

]]>We have measured the hyperfine splitting of the $7{P}_{1/2}$ state at the 100 ppm level in Fr isotopes (${}^{206g,206m,207,209,213,221}\mathrm{Fr}$) near the closed neutron shell ($N=126$ in ${}^{213}\mathrm{Fr}$). The measurements in five isotopes and a nuclear isomeric state of francium, combined with previous determinations of the $7{S}_{1/2}$…

[Phys. Rev. Lett. 115, 042501] Published Tue Jul 21, 2015

]]>We show that the critical exponent of a quantum phase transition in a damped-driven open system is determined by the spectral density function of the reservoir. We consider the open-system variant of the Dicke model, where the driven boson mode and also the large $N$ spin couple to independent reservo…

[Phys. Rev. Lett. 115, 043601] Published Tue Jul 21, 2015

]]>The buckling of mechanical beams under a compressive force can be tuned by adding holes into the beam.

[Phys. Rev. Lett. 115, 044301] Published Tue Jul 21, 2015

]]>We explore the slit-width dependence of the resonant transmission of sound in air through both a slit array formed of aluminum slats and a single open-ended slit cavity in an aluminum plate. Our experimental results accord well with Lord Rayleigh’s theory concerning how thin viscous and thermal boun…

[Phys. Rev. Lett. 115, 044302] Published Tue Jul 21, 2015

]]>Thermally activated deformation is investigated in two metallic glass systems with different cooling histories. By probing the atomic displacements and stress changes on the potential energy landscape, two deformation modes, a localized process and cascade process, have observed. The localized defor…

[Phys. Rev. Lett. 115, 045501] Published Tue Jul 21, 2015

]]>We assess the accuracy of vibrational damping rates of diatomic adsorbates on metal surfaces as calculated within the local-density friction approximation (LDFA). An atoms-in-molecules (AIM) type charge partitioning scheme accounts for intramolecular contributions and overcomes the systematic undere…

[Phys. Rev. Lett. 115, 046102] Published Tue Jul 21, 2015

]]>The spin transition in ${\mathrm{LaCoO}}_{3}$ has been investigated using density-functional theory in combination with dynamical mean-field theory employing continuous time quantum Monte Carlo and exact diagonalization impurity solvers. Calculations on the experimental rhombohedral atomic structure with two Co sit…

[Phys. Rev. Lett. 115, 046401] Published Tue Jul 21, 2015

]]>Superconducting radio frequency (srf) cavities, essential components of many large particle accelerators, rely on the metastable flux-free state of superconducting materials. In this Letter, we present results of experiments measuring the magnetic field limits of two srf materials, Nb and ${\mathrm{Nb}}_{3}\mathrm{Sn}$. Res…

[Phys. Rev. Lett. 115, 047001] Published Tue Jul 21, 2015

]]>The dynamics of proteins in the unfolded state can be quantified in computer simulations by calculating a spectrum of relaxation times which describes the time scales over which the population fluctuations decay to equilibrium. If the unfolded state space is discretized, we can evaluate the relaxati…

[Phys. Rev. Lett. 115, 048101] Published Tue Jul 21, 2015

]]>By means of extensive replica-exchange simulations of generic coarse-grained models for helical polymers, we systematically investigate the structural transitions into all possible helical phases for flexible and semiflexible elastic polymers with self-interaction under the influence of torsion barr…

[Phys. Rev. Lett. 115, 048301] Published Tue Jul 21, 2015

]]>[Phys. Rev. Lett. 115, 049902] Published Tue Jul 21, 2015

]]>The quantum capacity of a quantum channel is always smaller than the capacity of the channel for private communication. Both quantities are given by the infinite regularization of the coherent and the private information, respectively, which makes their evaluation very difficult. Here, we construct …

[Phys. Rev. Lett. 115, 040501] Published Mon Jul 20, 2015

]]>Fragile photon states useful for quantum communication can be faithfully transmitted and distinguished over a link between an orbiting satellite and a telescope on Earth.

[Phys. Rev. Lett. 115, 040502] Published Mon Jul 20, 2015

]]>The critical fluctuations at second order structural transitions in a bulk crystal may affect the dissipation of mechanical probes even if completely external to the crystal surface. Here, we show that noncontact force microscope dissipation bears clear evidence of the antiferrodistortive phase tran…

[Phys. Rev. Lett. 115, 046101] Published Mon Jul 20, 2015

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