Five trapped ions have been coupled to a high finesse optical cavity in a fully deterministic way.

[Phys. Rev. Lett. 116, 223001] Published Tue May 31, 2016

]]>We present experiments characterizing the detailed structure of a current layer, generated by the collision of two counterstreaming, supersonic and magnetized aluminum plasma flows. The antiparallel magnetic fields advected by the flows are found to be mutually annihilated inside the layer, giving r…

[Phys. Rev. Lett. 116, 225001] Published Tue May 31, 2016

]]>We explore the quantum dynamics of a bright matter-wave soliton in a quasi-one-dimensional bosonic superfluid with attractive interactions. Specifically, we focus on the dissipative forces experienced by the soliton due to its interaction with Bogoliubov excitations. Using the collective coordinate …

[Phys. Rev. Lett. 116, 225301] Published Tue May 31, 2016

]]>Through resistivity measurements of an organic crystal hosting massless Dirac fermions with a charge-ordering instability, we reveal the effect of interactions among massless Dirac fermions on the charge transport. A low-temperature resistivity upturn appears robustly irrespective of the pressure an…

[Phys. Rev. Lett. 116, 226401] Published Tue May 31, 2016

]]>Bilayer strontium ruthenate ${\mathrm{Sr}}_{3}{\mathrm{Ru}}_{2}{\mathrm{O}}_{7}$ displays pronounced non-Fermi liquid behavior at magnetic fields around 8 T, applied perpendicular to the ruthenate planes, which previously has been associated with an itinerant metamagnetic quantum critical end point (QCEP). We focus on the magnetic Grüneisen p…

[Phys. Rev. Lett. 116, 226402] Published Tue May 31, 2016

]]>Creation of deep core holes with very short ($\tau \le 1\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{fs}$) lifetimes triggers a chain of relaxation events leading to extensive nuclear dynamics on a few-femtosecond time scale. Here we demonstrate a general multistep ultrafast dissociation on an example of HCl following Cl $1s\to {\sigma}^{*}$ excitation. Intermediate…

[Phys. Rev. Lett. 116, 213001] Published Fri May 27, 2016

]]>Rydberg-atom ensembles are switched from a weakly to a strongly interacting regime via adiabatic transformation of the atoms from an approximately nonpolar into a highly dipolar quantum state. The resultant electric dipole-dipole forces are probed using a device akin to a field ion microscope. Ion i…

[Phys. Rev. Lett. 116, 213002] Published Fri May 27, 2016

]]>By pulsed $s$-shell resonant excitation of a single quantum dot-micropillar system, we generate long streams of 1000 near-transform-limited single photons with high mutual indistinguishability. The Hong-Ou-Mandel interference of two photons is measured as a function of their emission time separation v…

[Phys. Rev. Lett. 116, 213601] Published Fri May 27, 2016

]]>We present a method of locally inverting the sign of the coupling term in tight-binding systems, by means of inserting a judiciously designed ancillary site and eigenmode matching of the resulting vertex triplet. Our technique can be universally applied to all lattice configurations, as long as the …

[Phys. Rev. Lett. 116, 213901] Published Fri May 27, 2016

]]>The cross-correlation of a diffuse wave field converges toward the difference between the anticausal and causal Green’s functions between two points. This property has paved the way to passive imaging using ambient noise sources. In this Letter, we investigate Green’s function retrieval in electroma…

[Phys. Rev. Lett. 116, 213902] Published Fri May 27, 2016

]]>Quasilinear theory is often utilized to approximate the dynamics of fluids exhibiting significant interactions between mean flows and eddies. We present a generalization of quasilinear theory to include dynamic mode interactions on the large scales. This generalized quasilinear (GQL) approximation i…

[Phys. Rev. Lett. 116, 214501] Published Fri May 27, 2016

]]>A new technique requires much less energy to produce a beam of polarized positrons than previous techniques, making such beams potentially more widely available.

[Phys. Rev. Lett. 116, 214801] Published Fri May 27, 2016

]]>Strong electron interactions can lead to a variety of broken-symmetry phases in monolayer graphene. In the quantum Hall regime, the interaction effect are enhanced by the formation of highly degenerate Landau levels, catalyzing the emergence of such phases. Recent magnetotransport studies show evide…

[Phys. Rev. Lett. 116, 216801] Published Fri May 27, 2016

]]>We devise local lattice models whose ground states are model fractional Chern insulators—Abelian and non-Abelian topologically ordered states characterized by exact ground state degeneracies at any finite size and infinite entanglement gaps. Most saliently, we construct exact parent Hamiltonians for…

[Phys. Rev. Lett. 116, 216802] Published Fri May 27, 2016

]]>By means of first principles calculations, we investigate the nature of exchange coupling in ferromagnetic bcc Fe on a microscopic level. Analyzing the basic electronic structure reveals a drastic difference between the $3d$ orbitals of ${E}_{g}$ and ${T}_{2g}$ symmetries. The latter ones define the shape of the Fe…

[Phys. Rev. Lett. 116, 217202] Published Fri May 27, 2016

]]>[Phys. Rev. Lett. 116, 219903] Published Fri May 27, 2016

]]>Weinberg’s asymptotic safety scenario provides an elegant mechanism to construct a quantum theory of gravity within the framework of quantum field theory based on a non-Gaussian fixed point of the renormalization group flow. In this work we report novel evidence for the validity of this scenario, us…

[Phys. Rev. Lett. 116, 211302] Published Thu May 26, 2016

]]>We use holography to analyze the evolution of an ensemble of jets, with an initial probability distribution for their energy and opening angle as in proton-proton ($pp$) collisions, as they propagate through an expanding cooling droplet of strongly coupled plasma as in heavy ion collisions. We identif…

[Phys. Rev. Lett. 116, 211603] Published Thu May 26, 2016

]]>We present an expression for the QCD amplitude for a general hard scattering process with any number of soft gluon emissions, to one-loop accuracy. The amplitude is written in two different but equivalent ways: as a product of operators ordered in dipole transverse momentum and as a product of loop-…

[Phys. Rev. Lett. 116, 212003] Published Thu May 26, 2016

]]>We demonstrate that measurements of rapidity differential anisotropic flow in heavy-ion collisions can constrain the temperature dependence of the shear viscosity to entropy density ratio $\eta /s$ of QCD matter. Comparing results from hydrodynamic calculations with experimental data from the RHIC, we fin…

[Phys. Rev. Lett. 116, 212301] Published Thu May 26, 2016

]]>We report the first observation of localized modulation of turbulent density fluctuations $\tilde{n}$ (via beam emission spectroscopy) by neoclassical tearing modes (NTMs) in the core of the DIII-D tokamak. NTMs are important as they often lead to severe degradation of plasma confinement and disruptions in h…

[Phys. Rev. Lett. 116, 215001] Published Thu May 26, 2016

]]>The question of the nature of water’s glass transition has continued to be disputed over many years. Here we use slow heating scans ($0.4\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{K}\text{\hspace{0.17em}}{\mathrm{min}}^{-1}$) of compact amorphous solid water deposited at 77 K and an analysis of the accompanying changes in the small-angle neutron scattering signal, to study mes…

[Phys. Rev. Lett. 116, 215501] Published Thu May 26, 2016

]]>The current flowing through a Josephson junction could be controlled via Rashba spin splitting according to this theoretical proposal.

[Phys. Rev. Lett. 116, 217001] Published Thu May 26, 2016

]]>A hidden order that emerges in the frustrated pyrochlore ${\mathrm{Tb}}_{2+x}{\mathrm{Ti}}_{2-x}{\mathrm{O}}_{7+y}$ with ${T}_{c}=0.53\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{K}$ is studied using specific heat, magnetization, and neutron scattering experiments on a high-quality single crystal. Semiquantitative analyses based on a pseudospin-$1/2$ Hamiltonian for ionic non-Kramers magnetic d…

[Phys. Rev. Lett. 116, 217201] Published Thu May 26, 2016

]]>Manipulating and controlling the optical energy flow inside random media is a research frontier of photonics and the basis of novel laser designs. Here, we show that a metamaterial consisting of randomly dispersed graphene nanoflakes embedded within an optically pumped gain medium (rhodamine 6G) can…

[Phys. Rev. Lett. 116, 217401] Published Thu May 26, 2016

]]>A 15K increase in the nematic order transition temperature of liquid crystal dimers is achieved by subjected the materials to a 22T magnetic field. This increase is suggested to arise from magnetic-field induced changes in the molecules’ structure.

[Phys. Rev. Lett. 116, 217801] Published Thu May 26, 2016

]]>We study a model of bacterial dynamics where two interacting random walkers perform run-and-tumble motion on a one-dimensional lattice under mutual exclusion and find an exact expression for the probability distribution in the steady state. This stationary distribution has a rich structure comprisin…

[Phys. Rev. Lett. 116, 218101] Published Thu May 26, 2016

]]>[Phys. Rev. Lett. 116, 219902] Published Thu May 26, 2016

]]>The apparent lack of lithium in the Universe, relative to theoretical expectations, could be explained by hypothetical lightweight and electrically neutral particles.

[Phys. Rev. Lett. 116, 211303] Published Wed May 25, 2016

]]>We study weak coupling perturbative series in 4D $\mathcal{N}=2$ and 5D $\mathcal{N}=1$ supersymmetric gauge theories with Lagrangians. We prove that the perturbative series of these theories in the zero-instanton sector are Borel summable for various observables. Our result for the 4D $\mathcal{N}=2$ case supports an expectation from…

[Phys. Rev. Lett. 116, 211601] Published Wed May 25, 2016

]]>The strong dependence of Coulomb energies on nuclear radii makes it possible to extract the latter from calculations of the former. The resulting estimates of neutron skins indicate that two mechanisms are involved. The first one—isovector monopole polarizability—amounts to noting that when a partic…

[Phys. Rev. Lett. 116, 212501] Published Wed May 25, 2016

]]>We present a new type of colossal magnetoresistance (CMR) arising from an anomalous collapse of the Mott insulating state via a modest magnetic field in a bilayer ruthenate, Ti-doped ${\mathrm{Ca}}_{3}{\mathrm{Ru}}_{2}{\mathrm{O}}_{7}$. Such an insulator-metal transition is accompanied by changes in both lattice and magnetic structures. Our f…

[Phys. Rev. Lett. 116, 216401] Published Wed May 25, 2016

]]>First order time dependent perturbation theory is used to compute the full electronic friction tensor for adsorbate dynamics on metals surfaces. The results show that electronic friction-mediated coupling occurs between otherwise independent adsorbate modes.

[Phys. Rev. Lett. 116, 217601] Published Wed May 25, 2016

]]>We construct condensate states encoding the continuum spherically symmetric quantum geometry of a horizon in full quantum gravity, i.e., without any classical symmetry reduction, in the group field theory formalism. Tracing over the bulk degrees of freedom, we show how the resulting reduced density …

[Phys. Rev. Lett. 116, 211301] Published Tue May 24, 2016

]]>We propose a nonperturbative gauge-invariant regulator for $d$-dimensional chiral gauge theories on the lattice. The method involves simulating domain wall fermions in $d+1$ dimensions with quantum gauge fields that reside on one $d$-dimensional surface and are extended into the bulk via gradient flow. Th…

[Phys. Rev. Lett. 116, 211602] Published Tue May 24, 2016

]]>The RENO experiment has analyzed about 500 live days of data to observe an energy dependent disappearance of reactor ${\overline{\nu}}_{e}$ by comparing their prompt signal spectra measured in two identical near and far detectors. In the period between August of 2011 and January of 2013, the far (near) detector observ…

[Phys. Rev. Lett. 116, 211801] Published Tue May 24, 2016

]]>We report the analysis of the three-body ${e}^{+}{e}^{-}\to B\overline{B}{\pi}^{\pm}$, $B{\overline{B}}^{*}{\pi}^{\pm}$, and ${B}^{*}{\overline{B}}^{*}{\pi}^{\pm}$ processes, including the first observations of the ${Z}_{b}^{\pm}(10610)\to [B{\overline{B}}^{*}+\mathrm{c}.\mathrm{c}.{]}^{\pm}$ and ${Z}_{b}^{\pm}(10650)\to [{B}^{*}{\overline{B}}^{*}{]}^{\pm}$ transitions that are found to dominate the corresponding final states. We measure Born cross sections for the three-body product…

[Phys. Rev. Lett. 116, 212001] Published Tue May 24, 2016

]]>We present a fully differential next-to-next-to-leading order calculation of charm-quark production in charged-current deep-inelastic scattering, with full charm-quark mass dependence. The next-to-next-to-leading order corrections in perturbative quantum chromodynamics are found to be comparable in …

[Phys. Rev. Lett. 116, 212002] Published Tue May 24, 2016

]]>We explore a prototypical two-dimensional *massive* model of the nonlinear Dirac type and examine its solitary wave and vortex solutions. In addition to identifying the stationary states, we provide a systematic spectral stability analysis, illustrating the potential of spinor solutions to be neutrall…

[Phys. Rev. Lett. 116, 214101] Published Tue May 24, 2016

]]>The spin-orbit Mott insulator ${\mathrm{Sr}}_{3}{\mathrm{Ir}}_{2}{\mathrm{O}}_{7}$ provides a fascinating playground to explore insulator-metal transition driven by intertwined charge, spin, and lattice degrees of freedom. Here, we report high-pressure electric resistance and resonant inelastic x-ray scattering measurements on single-crystal ${\dots}_{}$

[Phys. Rev. Lett. 116, 216402] Published Tue May 24, 2016

]]>[Phys. Rev. Lett. 116, 219901] Published Tue May 24, 2016

]]>The collapse of a trapped ultracold magnetic gas is arrested by quantum fluctuations, creating quantum droplets of superfluid atoms.

[Phys. Rev. Lett. 116, 215301] Published Mon May 23, 2016

]]>We solve the long-standing problem of making $n$ perfect clones from $m$ copies of one of two known pure states with minimum failure probability in the general case where the known states have arbitrary *a priori* probabilities. The solution emerges from a geometric formulation of the problem. This formul…

[Phys. Rev. Lett. 116, 200401] Published Fri May 20, 2016

]]>We realized a quantum geometric “charge” pump for a Bose-Einstein condensate (BEC) in the lowest Bloch band of a novel bipartite magnetic lattice. Topological charge pumps in filled bands yield quantized pumping set by the global—topological—properties of the bands. In contrast, our geometric charge…

[Phys. Rev. Lett. 116, 200402] Published Fri May 20, 2016

]]>Thermal flow between two quantum systems can be controlled by the presence of a third. The current can be modulated, amplified and switched off, creating a quantum thermal transistor.

[Phys. Rev. Lett. 116, 200601] Published Fri May 20, 2016

]]>A link between the semiclassical Einstein equation and a maximal vacuum entanglement hypothesis is established. The hypothesis asserts that entanglement entropy in small geodesic balls is maximized at fixed volume in a locally maximally symmetric vacuum state of geometry and quantum fields. A qualit…

[Phys. Rev. Lett. 116, 201101] Published Fri May 20, 2016

]]>Baryon acoustic oscillations in the early Universe are predicted to leave an as yet undetected signature on the relative clustering of total mass versus luminous matter. A detection of this effect would provide an important confirmation of the standard cosmological paradigm and constrain alternative…

[Phys. Rev. Lett. 116, 201302] Published Fri May 20, 2016

]]>We investigate the close connection between the quantum phase space Wigner distribution of small-$x$ gluons and the color dipole scattering amplitude, and we propose studying it experimentally in the hard diffractive dijet production at the planned electron-ion collider. The angular correlation betwee…

[Phys. Rev. Lett. 116, 202301] Published Fri May 20, 2016

]]>We investigate the properties of two-dimensional parity-time symmetric periodic systems whose non-Hermitian periodicity is an integer multiple of the underlying Hermitian system’s periodicity. This creates a natural set of degeneracies that can undergo thresholdless $\mathcal{P}\mathcal{T}$ transitions. We derive a $\mathbf{k}\xb7\mathbf{p}$ p…

[Phys. Rev. Lett. 116, 203902] Published Fri May 20, 2016

]]>Single wavelength spectra are demonstrated for 2D micro-cavity lasers with fully chaotic cavities.

[Phys. Rev. Lett. 116, 203903] Published Fri May 20, 2016

]]>High power terahertz radiation can be produced by irradiating a solid target with intense laser pulses.

[Phys. Rev. Lett. 116, 205003] Published Fri May 20, 2016

]]>The effects of reduced dimensions and the interfaces on antiferromagnetic quantum criticality are studied in epitaxial Kondo superlattices, with alternating $n$ layers of heavy-fermion antiferromagnet ${\mathrm{CeRhIn}}_{5}$ and seven layers of normal metal ${\mathrm{YbRhIn}}_{5}$. As $n$ is reduced, the Kondo coherence temperature is…

[Phys. Rev. Lett. 116, 206401] Published Fri May 20, 2016

]]>We study wave propagation in uniform materials with periodic boundary profiles and introduce for the first time Bloch resonances and Bloch gaps. Bloch resonances are due to transverse phase matching, i.e., the coupling of two transverse standing waves corresponding to different harmonics. These are …

[Phys. Rev. Lett. 116, 206802] Published Fri May 20, 2016

]]>The relation between unusual Mexican-hat band dispersion, ferromagnetism, and ferroelasticity is investigated using a combination of analytical, first-principles, and phenomenological methods. The class of material with Mexican-hat band edge is studied using the $\alpha \text{\u2212}\mathrm{SnO}$ monolayer as a prototype. Such …

[Phys. Rev. Lett. 116, 206803] Published Fri May 20, 2016

]]>Ferroelectric phase transitions in BaTiO${}_{3}$ arise from an order-disorder transition with correlated disorder leading to the development of long-range crystallographic order in the material.

[Phys. Rev. Lett. 116, 207602] Published Fri May 20, 2016

]]>We consider the current-induced dynamics of insulating antiferromagnets in a spin Hall geometry. Sufficiently large in-plane currents perpendicular to the Néel order trigger spontaneous oscillations at frequencies between the acoustic and the optical eigenmodes. The direction of the driving current …

[Phys. Rev. Lett. 116, 207603] Published Fri May 20, 2016

]]>A suspension containing particles with wide-ranging diameters can crystallize into multiple ordered structures.

[Phys. Rev. Lett. 116, 208001] Published Fri May 20, 2016

]]>A systematic, statistical-mechanics-based analysis of the response of dielectric elastomers to coupled electromechanical loading is conducted, starting from the monomer level through the polymer chain and ending with closed-form expressions for the polarization and stress fields. It is found that th…

[Phys. Rev. Lett. 116, 208303] Published Fri May 20, 2016

]]>[Phys. Rev. Lett. 116, 209902] Published Fri May 20, 2016

]]>Entangled multipartite states are resources for universal quantum computation, but they can also give rise to ensembles of unitary transformations, a topic usually studied in the context of random quantum circuits. Using several graph state techniques, we show that these resources can “derandomize” …

[Phys. Rev. Lett. 116, 200501] Published Thu May 19, 2016

]]>A theoretical analysis examines the possibility that the black holes detected by LIGO serve as dark matter.

[Phys. Rev. Lett. 116, 201301] Published Thu May 19, 2016

]]>Inspired by the recent progress in the field of scattering amplitudes, we discuss hypothetical particles which can be characterized as the double copies of fermions—in the same way gravitons can be viewed as double copies of gauge bosons. As the gravitons, these hypothetical particles interact only …

[Phys. Rev. Lett. 116, 201601] Published Thu May 19, 2016

]]>We present state of the art resummation predictions for differential cross sections in top-quark pair production at the LHC. They are derived from a formalism which allows the simultaneous resummation of both soft and small-mass logarithms, which endanger the convergence of fixed-order perturbative …

[Phys. Rev. Lett. 116, 202001] Published Thu May 19, 2016

]]>We report the observation of electron-transfer-mediated decay (ETMD) involving magnesium (Mg) clusters embedded in helium (He) nanodroplets. ETMD is initiated by the ionization of He followed by removal of two electrons from the Mg clusters of which one is transferred to the He ion while the other e…

[Phys. Rev. Lett. 116, 203001] Published Thu May 19, 2016

]]>We demonstrate the occurrence of anomalous diffusion of dissipative solitons in a “simple” and deterministic prototype model: the cubic-quintic complex Ginzburg-Landau equation in two spatial dimensions. The main features of their dynamics, induced by symmetric-asymmetric explosions, can be modeled …

[Phys. Rev. Lett. 116, 203901] Published Thu May 19, 2016

]]>We present a study of laser-driven ion acceleration with micrometer and submicrometer thick plastic targets. Using laser pulses with high temporal contrast and an intensity of the order of ${10}^{20}\text{\hspace{0.17em}}\text{\hspace{0.17em}}\mathrm{W}/{\mathrm{cm}}^{2}$ we observe proton beams with cutoff energies in excess of 85 MeV and particle numbers of ${10}^{9}$ in an …

[Phys. Rev. Lett. 116, 205002] Published Thu May 19, 2016

]]>A new bosonic species of ultracold alkali heteromolecule with a considerable electric dipole moment has been cooled to its vibrational ground state.

[Phys. Rev. Lett. 116, 205303] Published Thu May 19, 2016

]]>Classical systems containing cleverly devised combinations of loss and gain elements constitute extremely rich building units that can mimic non-Hermitian properties, which conventionally are attainable in quantum mechanics only. Parity-time ($\mathcal{P}\mathcal{T}$) symmetric media, also referred to as synthetic media,…

[Phys. Rev. Lett. 116, 207601] Published Thu May 19, 2016

]]>Network models with latent geometry have been used successfully in many applications in network science and other disciplines, yet it is usually impossible to tell if a given real network is geometric, meaning if it is a typical element in an ensemble of random geometric graphs. Here we identify str…

[Phys. Rev. Lett. 116, 208302] Published Thu May 19, 2016

]]>[Phys. Rev. Lett. 116, 209901] Published Thu May 19, 2016

]]>The carrier envelope phase (CEP) is a crucial parameter for a few-cycle laser pulse since it substantially determines the laser waveform. Stepping forward from infrared to extreme ultraviolet (EUV) pulses, we propose a strategy to directly characterize the CEP of an isolated attosecond pulse (IAP) b…

[Phys. Rev. Lett. 116, 203601] Published Wed May 18, 2016

]]>The polarization of an intense laser beam has been directly controlled by mixing it with a second laser beam in a plasma.

[Phys. Rev. Lett. 116, 205001] Published Wed May 18, 2016

]]>The local structure of glasses and other disordered materials could be extracted from diffraction patterns, according to a proposal for a new technique.

[Phys. Rev. Lett. 116, 205501] Published Wed May 18, 2016

]]>Chirality is known to play a pivotal role in determining material properties and functionalities. However, it remains a great challenge to understand and control the emergence of chirality and the related enantioselective process particularly when the building components of the system are achiral. H…

[Phys. Rev. Lett. 116, 205502] Published Wed May 18, 2016

]]>We study the phenomenon of migration of the small molecular weight component of a binary polymer mixture to the free surface using mean field and self-consistent field theories. By proposing a free energy functional that incorporates polymer-matrix elasticity explicitly, we compute the migrant volum…

[Phys. Rev. Lett. 116, 208301] Published Wed May 18, 2016

]]>[Phys. Rev. Lett. 116, 209001] Published Wed May 18, 2016

]]>The tunneling rate for cold atoms in an optical lattice can be made to depend on whether a neighboring site is occupied—a behavior that may reflect the tunneling in complex materials.

[Phys. Rev. Lett. 116, 205301] Published Tue May 17, 2016

]]>An electron crystal sliding on liquid helium exhibits a qualitatively new type of stick-slip motion, resulting from the coupling of the electrons to a quantum field.

[Phys. Rev. Lett. 116, 206801] Published Mon May 16, 2016

]]>We introduce a deterministic chaotic system—the Szilard map—that encapsulates the measurement, control, and erasure protocol by which Maxwellian demons extract work from a heat reservoir. Implementing the demon’s control function in a dynamical embodiment, our construction symmetrizes the demon and …

[Phys. Rev. Lett. 116, 190601] Published Fri May 13, 2016

]]>A tiny, needle-shaped ferromagnet could form a magnetic sensor far better than the current best instruments, according to theory.

[Phys. Rev. Lett. 116, 190801] Published Fri May 13, 2016

]]>We use dynamic coherent backscattering to study one of the Anderson mobility gaps in the vibrational spectrum of strongly disordered three-dimensional mesoglasses. Comparison of experimental results with the self-consistent theory of localization allows us to estimate the localization (correlation) …

[Phys. Rev. Lett. 116, 193901] Published Fri May 13, 2016

]]>The charge density wave transition seen in purple bronze most likely arises from electron-electron interactions.

[Phys. Rev. Lett. 116, 196401] Published Fri May 13, 2016

]]>Here we demonstrate how the Fermi surface topology and quantum many-body interactions can be manipulated via epitaxial strain in the spin-triplet superconductor ${\mathrm{Sr}}_{2}{\mathrm{RuO}}_{4}$ and its isoelectronic counterpart ${\mathrm{Ba}}_{2}{\mathrm{RuO}}_{4}$ using oxide molecular beam epitaxy, *in situ* angle-resolved photoemission spectroscopy, an…

[Phys. Rev. Lett. 116, 197003] Published Fri May 13, 2016

]]>An essential step toward elucidating the mechanism of superconductivity is to determine the sign or phase of the superconducting order parameter, as it is closely related to the pairing interaction. In conventional superconductors, the electron-phonon interaction induces attraction between electrons…

[Phys. Rev. Lett. 116, 197004] Published Fri May 13, 2016

]]>[Phys. Rev. Lett. 116, 199902] Published Fri May 13, 2016

]]>An analysis of the polarized emission from some 3000 distant radio sources places a stringent upper limit on the strength of the cosmological magnetic field.

[Phys. Rev. Lett. 116, 191302] Published Thu May 12, 2016

]]>Proton migration is a ubiquitous process in chemical reactions related to biology, combustion, and catalysis. Thus, the ability to manipulate the movement of nuclei with tailored light within a hydrocarbon molecule holds promise for far-reaching applications. Here, we demonstrate the steering of hyd…

[Phys. Rev. Lett. 116, 193001] Published Thu May 12, 2016

]]>In the angle-averaged excitation and decay spectra of molecules, vibronic coupling may induce the usually weak dipole-forbidden transitions by the excitation intensity borrowing mechanism. The present complementary theoretical and experimental study of the resonant Auger decay of core-to-Rydberg exc…

[Phys. Rev. Lett. 116, 193002] Published Thu May 12, 2016

]]>We study three-body recombination of ${\mathrm{Ba}}^{+}+\mathrm{Rb}+\mathrm{Rb}$ in the mK regime where a single ${{}^{138}\mathrm{Ba}}^{+}$ ion in a Paul trap is immersed into a cloud of ultracold ${}^{87}\mathrm{Rb}$ atoms. We measure the energy dependence of the three-body rate coefficient ${k}_{3}$ and compare the results to the theoretical prediction, ${k}_{3}\propto {E}_{\mathrm{col}}^{-3/4}$, where ${\dots}_{}$

[Phys. Rev. Lett. 116, 193201] Published Thu May 12, 2016

]]>Recent investigations have revealed that ion transport from aqueous electrolytes to ion-selective surfaces is subject to electroconvective instability that stems from coupling of hydrodynamics with electrostatic forces. These systems inherently involve fluid density variation set by salinity gradien…

[Phys. Rev. Lett. 116, 194501] Published Thu May 12, 2016

]]>Trion states of three correlated particles (e.g., two electrons and one hole) are essential to understand the optical spectra of doped or gated nanostructures, like carbon nanotubes or transition-metal dichalcogenides. We develop a theoretical many-body description for such correlated states using a…

[Phys. Rev. Lett. 116, 196804] Published Thu May 12, 2016

]]>We report the first observation of the coexistence of a distinct midgap state and a Mott state in undoped and their evolution in electron and hole-doped ambipolar ${\mathrm{Y}}_{0.38}{\mathrm{La}}_{0.62}({\mathrm{Ba}}_{0.82}{\mathrm{La}}_{0.18}{)}_{2}{\mathrm{Cu}}_{3}{\mathrm{O}}_{y}$ films using spectroscopic ellipsometry and x-ray absorption spectroscopies at the O $K$ and Cu ${L}_{3,2}$ edges. …

[Phys. Rev. Lett. 116, 197002] Published Thu May 12, 2016

]]>We study the entanglement entropy and entanglement spectrum of the paradigmatic Bose-Hubbard model, describing strongly correlated bosons on a lattice. The use of a controlled approximation—the slave-boson approach—allows us to study entanglement in all regimes of the model (and, most importantly, a…

[Phys. Rev. Lett. 116, 190401] Published Wed May 11, 2016

]]>Quantum mechanics predicts microscopic phenomena with undeniable success. Nevertheless, current theoretical and experimental efforts still do not yield conclusive evidence that there is or is not a fundamental limitation on the possibility to observe quantum phenomena at the macroscopic scale. This …

[Phys. Rev. Lett. 116, 190502] Published Wed May 11, 2016

]]>We use the soft-collinear bootstrap to construct the 8-loop integrand for the 4-point amplitude and 4-stress-tensor correlation function in planar maximally supersymmetric Yang-Mills theory. Both have a unique representation in terms of planar, conformal integrands grouped according to a hidden symm…

[Phys. Rev. Lett. 116, 191602] Published Wed May 11, 2016

]]>Processes involving narrow jets receive perturbative corrections enhanced by logarithms of the jet opening angle and the ratio of the energies inside and outside the jets. Analyzing cone-jet processes in effective field theory, we find that in addition to soft and collinear fields their description …

[Phys. Rev. Lett. 116, 192001] Published Wed May 11, 2016

]]>The formalism based on factorization and nuclear spectral functions has been generalized to treat transition matrix elements involving two-nucleon currents, whose contribution to the nuclear electromagnetic response in the transverse channel is known to be significant. We report the results of calcu…

[Phys. Rev. Lett. 116, 192501] Published Wed May 11, 2016

]]>A shear Alfvén wave parametric instability is observed for the first time in the laboratory. When a single finite $\omega /{\mathrm{\Omega}}_{i}$ kinetic Alfvén wave (KAW) is launched in the Large Plasma Device above a threshold amplitude, three daughter modes are produced. These daughter modes have frequencies and parallel w…

[Phys. Rev. Lett. 116, 195002] Published Wed May 11, 2016

]]>We identify by *ab initio* calculations a novel topological semimetal carbon phase in all-$s{p}^{2}$ bonding networks with a 16-atom body-centered orthorhombic unit cell, termed bco-${\mathrm{C}}_{16}$. Total-energy calculations show that bco-${\mathrm{C}}_{16}$ is comparable to solid fcc-${\mathrm{C}}_{60}$ in energetic stability, and phonon and molecula…

[Phys. Rev. Lett. 116, 195501] Published Wed May 11, 2016

]]>The injection of spin currents in semiconductors is one of the big challenges of spintronics. Motivated by the ultrafast demagnetization and spin injection into metals, we propose an alternative femtosecond route based on the laser excitation of superdiffusive spin currents in a ferromagnet such as …

[Phys. Rev. Lett. 116, 196601] Published Wed May 11, 2016

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