Quench dynamics is studied for a one-dimensional system that is described by the noninteracting and massless bosonic quantum field theory. The discovery of the system’s memory of all initial correlations, which is accessible by local measurements at infinitely large times, suggests a failure of using a Gaussian generalized Gibbs ensemble to describe the relaxation of the system.

[Phys. Rev. A 94, 031605(R)] Published Fri Sep 23, 2016

]]>Memory effects play a fundamental role in the study of the dynamics of open quantum systems. There exist two conceptually distinct notions of memory discussed for quantum channels in the literature. In quantum information theory quantum channels with memory are characterized by the existence of corr…

[Phys. Rev. A 94, 032121] Published Fri Sep 23, 2016

]]>We study the optimal Slater-determinant approximation of an $N$-fermion wave function analytically. That is, we seek the Slater-determinant (constructed out of $N$ orthonormal single-particle orbitals) wave function having largest overlap with a given $N$-fermion wave function. Some simple lemmas have bee…

[Phys. Rev. A 94, 032513] Published Fri Sep 23, 2016

]]>We review the calculation of Fermi's golden rule for a system of $N$-body dipoles, magnetic or electric, weakly interacting with a blackbody radiation. By using the magnetic or electric field-field correlation function evaluated in the 1960s for blackbody radiation, we deduce a general formula for the…

[Phys. Rev. A 94, 032514] Published Fri Sep 23, 2016

]]>We study the late-time relaxation following a quench in an open quantum many-body system. We consider the open Dicke model, describing the infinite-range interactions between $N$ atoms and a single, lossy electromagnetic mode. We show that the dynamical phase transition at a critical atom-light coupli…

[Phys. Rev. A 94, 033628] Published Fri Sep 23, 2016

]]>We show that double-quantum spin vortices, which are characterized by doubly quantized circulating spin currents and unmagnetized filled cores, can exist in the ground states of SU(3) spin-orbit-coupled Bose gases. It is found that the SU(3) spin-orbit coupling and spin-exchange interaction play imp…

[Phys. Rev. A 94, 033629] Published Fri Sep 23, 2016

]]>We propose the use of ultrafast electron diffraction (UED) to image a controllable, laser-driven coherent electron population transfer in lithium atoms with currently available femtosecond electron pulses. Our simulations demonstrate the ability of ultrafast electrons to image such an electronic pop…

[Phys. Rev. A 94, 030702(R)] Published Thu Sep 22, 2016

]]>In quadrupole-bound anions, an extra electron is attached at a sufficiently large quadrupole moment of a neutral molecule, which is lacking a permanent dipole moment. The nature of the bound states and low-lying resonances of such anions is of interest for understanding the threshold behavior of ope…

[Phys. Rev. A 94, 032511] Published Thu Sep 22, 2016

]]>We study the effective three-particle interactions between valence electrons, which are induced by the core polarization. Such interactions are enhanced when valence orbitals have a strong overlap with the outermost core shell, in particular, for systems with partially filled $f$ shells. We find that …

[Phys. Rev. A 94, 032512] Published Thu Sep 22, 2016

]]>A theory is developed to analytically represent a general class of driven-dissipative nonlinear resonators. The solvable model allows one to reveal the mesoscopic regime of interacting photons and dissipative phase transitions.

[Phys. Rev. A 94, 033841] Published Thu Sep 22, 2016

]]>We consider the phase sensing via a weak optical coherent state at quantum limit precision. A detection scheme for the phase estimation is proposed, which is inspired by the suboptimal quantum measurement in coherent optical communication. We theoretically analyze a performance of our detection sche…

[Phys. Rev. A 94, 033842] Published Thu Sep 22, 2016

]]>In this article, we study the nonlinear coupling between the stationary (i.e., the beating modulation signal) and transient (i.e., the laser quantum noise) dynamics of a laser subjected to frequency-shifted optical feedback. We show how the noise power spectrum and more specifically the relaxation o…

[Phys. Rev. A 94, 033843] Published Thu Sep 22, 2016

]]>As one of the most intriguing intrinsic properties of the quantum world, quantum superposition provokes great interest in its own generation. Though a universal quantum machine that creates superposition of two arbitrary unknown states has been shown to be physically impossible, a probabilistic prot…

[Phys. Rev. A 94, 033844] Published Thu Sep 22, 2016

]]>In this Rapid Communication, we investigate the universal properties of a spin-polarized two-component Fermi gas in one dimension (1D) using the Bethe ansatz. We discuss the quantum phases and phase transitions by obtaining exact results for the equation of state, the contact, the magnetic susceptib…

[Phys. Rev. A 94, 031604(R)] Published Wed Sep 21, 2016

]]>We introduce a method of investigating qutrit nonclassicality by translating qutrit operators to symmetric two-qubit operators. We show that this procedure sheds light on the discrepancy between maximal qutrit entanglement and maximal nonclassicality of qutrit correlations. Namely, we express Bell o…

[Phys. Rev. A 94, 032119] Published Wed Sep 21, 2016

]]>An interesting connection has been established between two apparently unrelated concepts, namely, quantum nonlocality and Bayesian game theory. It has been shown that nonlocal correlations in the form of advice can outperform classical equilibrium strategies in common-interest Bayesian games and als…

[Phys. Rev. A 94, 032120] Published Wed Sep 21, 2016

]]>An experimental investigation of the breakup of ${\left(\mathrm{C}{\mathrm{O}}_{2}\right)}^{3+}$ induced by $\mathrm{N}{\mathrm{e}}^{4+}$ ion impact at incident energies of 1.12 MeV was performed. By analyzing the momentum distributions and the kinetic energies of the three fragment ions, the nonsequential and sequential dissociation mechanisms are verified. In co…

[Phys. Rev. A 94, 032708] Published Wed Sep 21, 2016

]]>The scattering properties regarding the rotational degrees of freedom of a molecular ion in the presence of a buffer gas of helium are investigated. This study is undertaken within the framework of the infinite-order sudden approximation for rotational transitions, which is shown to be applicable to…

[Phys. Rev. A 94, 032709] Published Wed Sep 21, 2016

]]>We theoretically investigate the electron momentum distributions in orthogonally polarized two-color pulses with the Coulomb-Volkov distorted-wave approximation (CVA) theory and focus on the role of the Coulomb potential in the electron momentum distributions by comparing the CVA results with the st…

[Phys. Rev. A 94, 033418] Published Wed Sep 21, 2016

]]>We study in detail a peculiar configuration of the Talbot-Lau matter wave interferometer, characterized by unequal distances between the two diffraction gratings and the observation plane. We refer to this apparatus as the “asymmetric Talbot-Lau setup.” Particular attention is given to its capabilit…

[Phys. Rev. A 94, 033625] Published Wed Sep 21, 2016

]]>Bose-Einstein condensates of ultracold atoms can be used to sense fluctuations of the magnetic field by means of transitions into untrapped hyperfine states. It has been shown recently that counting the outcoupled atoms can yield the power spectrum of the magnetic noise. We calculate the spectral re…

[Phys. Rev. A 94, 033626] Published Wed Sep 21, 2016

]]>A theoretical model of a Bose-Einstein condensate with angular spin-orbit coupling has recently been proposed and it has been established that a half-skyrmion represents the ground state in a certain regime of spin-orbit coupling and interaction. Here we investigate low-lying excitations of this pha…

[Phys. Rev. A 94, 033627] Published Wed Sep 21, 2016

]]>In the generic formulation of optical interactions there is, beyond the familiar electric and magnetic multipolar forms of coupling, an additional diamagnetization term that rarely receives attention. In fact it can give rise to effects that should be observable in the general context of nonlinear o…

[Phys. Rev. A 94, 033837] Published Wed Sep 21, 2016

]]>We investigate superradiance and subradiance of indistinguishable atoms with quantized motional states, starting with an initial total state that factorizes over the internal and external degrees of freedom of the atoms. Due to the permutational symmetry of the motional state, the cooperative sponta…

[Phys. Rev. A 94, 033838] Published Wed Sep 21, 2016

]]>In this article we present a numerical study of the collective dynamics in a population of coupled semiconductor lasers with a saturable absorber, operating in the excitable regime under the action of additive noise. We demonstrate that temporal and intensity synchronization takes place in a broad r…

[Phys. Rev. A 94, 033839] Published Wed Sep 21, 2016

]]>We present, experimentally and theoretically, a scheme for dressed-state electromagnetically induced transparency (EIT) in a three-step cascade system in which a four-level system is mapped into an effective three-level system. Theoretical analysis reveals that the scheme provides coherent-state con…

[Phys. Rev. A 94, 033840] Published Wed Sep 21, 2016

]]>We provide a graphical description of the entanglement of pure-state multiparty systems based on an analogy between a bipartite purity analysis and the centroid of a collection of point masses. This description applies to quantum systems with $N$ parties, each with an arbitrary number of (discrete) st…

[Phys. Rev. A 94, 030303(R)] Published Tue Sep 20, 2016

]]>We predict a fundamental scaling law of Bloch oscillation in Weyl semimetals, which manifests that the transverse drift of quasiparticles accelerated bypassing a Weyl point exhibits asymptotically a linear log-log relation with respect to the minimal momentum measured from the Weyl point. This scali…

[Phys. Rev. A 94, 031603(R)] Published Tue Sep 20, 2016

]]>The computational difficulty of solving fully quantum many-body spin problems is a significant obstacle to understanding the behavior of strongly correlated quantum matter. Experimental ion trap quantum simulation is a promising approach for studying these lattice spin models, but has so far been li…

[Phys. Rev. A 94, 032320] Published Tue Sep 20, 2016

]]>Recently, we studied the magic wavelength for the atomic hydrogen $1S\text{\u2212}2S$ transition [A. Kawasaki, Phys. Rev. A **92**, 042507 (2015)]. An explicit summation over virtual atomic states of the discrete part of the hydrogen spectrum was performed to evaluate the atomic polarizability. In this paper, we supp…

[Phys. Rev. A 94, 032510] Published Tue Sep 20, 2016

]]>In the framework of the signal processing approach to single-atom resonance fluorescence with spectral resolution, we diagrammatically derive an analytical formula for arbitrary-order spectral correlation functions of the scattered fields that pass through Fabry-Perot interferometers. Our general ex…

[Phys. Rev. A 94, 033835] Published Tue Sep 20, 2016

]]>We discuss the role of diffuse, Mie, and cooperative scattering on the radiation pressure force acting on the center of mass of a cloud of cold atoms. Even though a mean-field ansatz (the “timed Dicke state”), previously derived from a cooperative scattering approach, has been shown to agree satisfa…

[Phys. Rev. A 94, 033836] Published Tue Sep 20, 2016

]]>[Phys. Rev. A 94, 039902] Published Tue Sep 20, 2016

]]>We study how well we can retrodict results of measurements made on a quantum system if we can make measurements on its final state. We know what measurements were made, but not their results. An initial examination shows that we can gain anywhere from no information to perfect information about the …

[Phys. Rev. A 94, 032118] Published Mon Sep 19, 2016

]]>We have proved that new randomness can be certified by partially free sources using $2\to 1$ quantum random access code (QRAC) in the framework of semi-device-independent (SDI) protocols [Y.-Q. Zhou, H.-W. Li, Y.-K. Wang, D.-D. Li, F. Gao, and Q.-Y. Wen, Phys. Rev. A **92**, 022331 (2015)]. To improve the ef…

[Phys. Rev. A 94, 032318] Published Mon Sep 19, 2016

]]>Recently, two-photon six-qubit hyperentangled states were produced in experiment and they can improve the channel capacity of quantum communication largely. Here we present a scheme for the hyperentanglement purification of nonlocal two-photon systems in three degrees of freedom (DOFs), including th…

[Phys. Rev. A 94, 032319] Published Mon Sep 19, 2016

]]>Charge-transfer $n$ partial cross sections have been calculated for collisions of ${\mathrm{Be}}^{4+}$ with $\mathrm{H}\left(1s\right)$ by means of a versatile lattice method that is applicable in a wide energy range (between 1 and 500 keV/u). The cross sections, which include up to the high-lying $n=8$ level, are compared to existing semic…

[Phys. Rev. A 94, 032707] Published Mon Sep 19, 2016

]]>Features of Coulomb focusing are identified in a photoelectron’s momentum distribution in strong-field ionization. The unstreakable nature of these features reveals a subtle connection between the initial condition of the electron and the phase of the two-color laser field at the time of tunnel ionization, and the Coulomb interaction between the electron and the ion core.

[Phys. Rev. A 94, 033416] Published Mon Sep 19, 2016

]]>We present laser-induced electron diffraction measurements of elastic differential scattering cross sections (DCSs) of a photoelectron on the parent ion for argon, krypton, and xenon, using waveform-controlled few-cycle pulses. Considering only cutoff electrons and employing the adiabatic theory for…

[Phys. Rev. A 94, 033417] Published Mon Sep 19, 2016

]]>Very different strongly interacting quantum systems such as Fermi gases, quark-gluon plasmas formed in high-energy ion collisions, and black holes studied theoretically in string theory are known to exhibit quantitatively similar damping of hydrodynamic modes. It is not known if such similarities ex…

[Phys. Rev. A 94, 033621] Published Mon Sep 19, 2016

]]>The sensitivity of the pinning transition (PT) as described by the sine-Gordon model of strongly interacting bosons confined in a shallow, one-dimensional, periodic optical lattice (OL), is examined against perturbations of the OL. The PT has been recently realized experimentally by Haller *et al.* [N…

[Phys. Rev. A 94, 033622] Published Mon Sep 19, 2016

]]>Using the density-matrix renormalization-group method, we studied the ground state of the one-dimensional $S=1$ Bose-Hubbard model with local three-body interactions, which can be a superfluid or a Mott insulator state. We drew the phase diagram of this model for both ferromagnetic and antiferromagnet…

[Phys. Rev. A 94, 033623] Published Mon Sep 19, 2016

]]>We report the observation of quantum dynamical oscillations of ultracold atomic gases in the $F$ and $D$ bands of an ordinary optical lattice. We are able to control the Bragg reflections at the Brillouin-zone edge up to the third order. As a result, we can switch the quantum dynamics from oscillations …

[Phys. Rev. A 94, 033624] Published Mon Sep 19, 2016

]]>We present an effective-medium model for a subwavelength periodically patterned metallic layer, its cavities being filled with a nonlinear dielectric material, which accounts for both the linear and second-order behavior. The effective nonlinear susceptibility for the homogenized layer is driven by …

[Phys. Rev. A 94, 033831] Published Mon Sep 19, 2016

]]>The influence of the center-of-mass motion of a trapped atom on the efficiency of resonant single-photon absorption is investigated. It is found that, even for small trapping frequencies, high single-photon excitation efficiency can be achieved by squeezing the center-of-mass wave packet with modulated trapping frequencies.

[Phys. Rev. A 94, 033832] Published Mon Sep 19, 2016

]]>The Lamb shift (self-energy) of an elliptic dielectric microcavity is studied. We show that the size of the Lamb shift, which is a small energy shift due to the system-environment coupling in the quantum regime, is dependent on the geometry of the boundary conditions. It shows a global transition de…

[Phys. Rev. A 94, 033833] Published Mon Sep 19, 2016

]]>An exceptional point (EP) is a degeneracy occurring in a non-energy-conserving system, in which two eigenvectors of a non-Hermitian Hamiltonian coalesce. We explore how EPs can be realized in a metamaterial surface, or metasurface, consisting of a pair of lossy coupled linear antennas in each unit c…

[Phys. Rev. A 94, 033834] Published Mon Sep 19, 2016

]]>Possible paths of a photon passing through a nested Mach-Zehnder interferometer on its way to a detector are analyzed using the consistent histories formulation of quantum mechanics, and confirmed using a set of weak measurements (but not weak values). The results disagree with an analysis by Vaidma…

[Phys. Rev. A 94, 032115] Published Fri Sep 16, 2016

]]>The concept of weak invariant is introduced. Then the weak invariants associated with time-dependent quantum dissipative systems are discussed in the context of master equations of the Lindblad type. In particular, with the help of the $\mathit{su}$(1,1) Lie-algebraic structure, the weak invariant is explicitl…

[Phys. Rev. A 94, 032116] Published Fri Sep 16, 2016

]]>When conducting a Bell test, it is normal to assume that the preparation of the quantum state is independent of the measurements performed on it. Remarkably, the violation of local realism by entangled quantum systems can be certified even if this assumption is partially relaxed. Here, we allow such…

[Phys. Rev. A 94, 032117] Published Fri Sep 16, 2016

]]>We derive an inequality that is necessary and sufficient to show Einstein-Podolsky-Rosen (EPR) steering in a scenario employing only correlations between two arbitrary dichotomic measurements on each party. Thus the inequality is a complete steering analogy of the Clauser-Horne-Shimony-Holt (CHSH) i…

[Phys. Rev. A 94, 032317] Published Fri Sep 16, 2016

]]>The underlying physics behind the molecular harmonic emission in relatively long $\mathrm{sin}{}^{2}$-like laser pulses is investigated. We numerically solved the full-dimensional electronic time-dependent Schrödinger equation beyond the Born-Oppenheimer approximation for simple molecular ion ${\mathrm{H}}_{2}{}^{+}$. The occurrence an…

[Phys. Rev. A 94, 033415] Published Fri Sep 16, 2016

]]>Cold atomic ensembles and spinor Bose-Einstein condensates are potential candidates for quantum memories as they have long coherence times and can be coherently controlled. Unlike most candidates for quantum memories, which are genuine or effective single-particle systems, in atomic ensembles the qu…

[Phys. Rev. A 94, 033620] Published Fri Sep 16, 2016

]]>Motivated by trapping and cooling experiments with nonspherical nanoparticles, we discuss how their combined rotational and translational quantum state is affected by the interaction with a gaseous environment. Based on the quantum master equation in terms of orientation-dependent scattering amplitu…

[Phys. Rev. A 94, 033828] Published Fri Sep 16, 2016

]]>We study the dissipative dynamics of an atom in a V-level configuration driven by lasers and coupled to a semi-infinite waveguide. The coupling to the waveguide is chiral, in that each transition interacts only with the modes propagating in a given direction, and this direction is opposite for the t…

[Phys. Rev. A 94, 033829] Published Fri Sep 16, 2016

]]>We demonstrate that light is subject to anomalous (i.e., negative) diffraction when propagating in the presence of hyperbolic dispersion. We show that light propagation in hyperbolic media resembles the dynamics of a quantum particle of negative mass moving in a two-dimensional potential. The negati…

[Phys. Rev. A 94, 033830] Published Fri Sep 16, 2016

]]>Practical quantum communication (QC) protocols are assumed to be secure provided implemented devices are properly characterized and all known side channels are closed. We show that this is not always true. We demonstrate a laser-damage attack capable of modifying device behavior on demand. We test i…

[Phys. Rev. A 94, 030302(R)] Published Thu Sep 15, 2016

]]>In creating a large-scale quantum information processor, the ability to construct control pulses for implementing an arbitrary quantum circuit in a scalable manner is an important requirement. For liquid-state nuclear-magnetic-resonance quantum computing, a circuit is generally realized through a se…

[Phys. Rev. A 94, 032316] Published Thu Sep 15, 2016

]]>Building on work by J. Meixner [Z. Naturforschung **3a**, 506 (1948)], we show how to compute the exact scattering amplitude (or $\mathrm{T}$-matrix) for electromagnetic scattering from a perfectly conducting disk. This calculation is a rare example of a nondiagonal $\mathrm{T}$-matrix that can nonetheless be obtained in a s…

[Phys. Rev. A 94, 032509] Published Thu Sep 15, 2016

]]>Photoionization from energetically distinct electronic states may have a relative time delay of tens of attoseconds. Here we demonstrate that pulses of optical vortices allow the measurement of such attosecond delays from magnetic sublevels, even from a spherically symmetric target. The difference i…

[Phys. Rev. A 94, 033414] Published Thu Sep 15, 2016

]]>We show that, when $N$ is a multiple of 6 ($N=6m$, where $m$ is an integer), the $\mathrm{SU}\phantom{\rule{0.16em}{0ex}}{\left(N\right)}_{}$ Heisenberg model on the honeycomb lattice with $m$ particles per site has a clear tendency toward chiral order as soon as $m\ge 2$. This conclusion has been reached by a systematic variational Monte Carlo investigation of Gutzwi…

[Phys. Rev. A 94, 033617] Published Thu Sep 15, 2016

]]>We consider the ground state properties of a trapped dipolar condensate under the influence of quantum fluctuations. We show that this system can undergo a phase transition from a low density condensate state to a high density droplet state, which is stabilized by quantum fluctuations. The energetic…

[Phys. Rev. A 94, 033619] Published Thu Sep 15, 2016

]]>We investigate electromagnetic scattering of normally irradiated gyrotropic, magneto-optical core-shell cylinders using Lorenz-Mie theory. A general expression for time-averaged electromagnetic energy inside a coated gyroelectric and gyromagnetic scatterer is derived. Using realistic material parame…

[Phys. Rev. A 94, 033825] Published Thu Sep 15, 2016

]]>We derive analytical expressions for the coherence in the onset of modulation instability, in excellent agreement with thorough numerical simulations. As usual, we start by a linear perturbation analysis, where broadband noise is added to a cw pump; then, we investigate the effect of adding a determ…

[Phys. Rev. A 94, 033826] Published Thu Sep 15, 2016

]]>We investigate the photon emission properties of the driven-dissipative Rabi model in the so-called ultrastrong- and deep strong-coupling regimes where the atom-cavity coupling rate $g$ becomes comparable or larger than the cavity frequency ${\omega}_{c}$. By solving numerically the master equation in the dressed…

[Phys. Rev. A 94, 033827] Published Thu Sep 15, 2016

]]>[Phys. Rev. A 94, 039901] Published Thu Sep 15, 2016

]]>Digital quantum simulation of fermionic systems is important in the context of chemistry and physics. Simulating fermionic models on general purpose quantum computers requires imposing a fermionic algebra on qubits. The previously studied Jordan-Wigner and Bravyi-Kitaev transformations are two techn…

[Phys. Rev. A 94, 030301(R)] Published Wed Sep 14, 2016

]]>Complex mesoscopic systems play increasingly important roles in modern science, from understanding biological functions at the molecular level to designing solid-state information processing devices. The operation of these systems typically depends on their energetic structure, yet probing their ene…

[Phys. Rev. A 94, 032112] Published Wed Sep 14, 2016

]]>Negative entropy in connection with the Casimir effect at uniform temperature is a phenomenon rooted in the circumstance that one is describing a nonclosed system, or only part of a closed system. In this paper we show that the phenomenon is not necessarily restricted to electromagnetic theory but c…

[Phys. Rev. A 94, 032113] Published Wed Sep 14, 2016

]]>In this work we present a generalization of the recently developed Hardy-like logical proof of contextuality and of the so-called KCBS contextuality inequality for any qudit of dimension greater than three. Our approach uses compatibility graphs that can only be satisfied by qudits. We find a constr…

[Phys. Rev. A 94, 032114] Published Wed Sep 14, 2016

]]>We present a scheme for generating robust and persistent entanglement between qubits that do not interact and that are separated by a long and lossy transmission channel, using Markovian reservoir engineering. The proposal uses only the correlated decay into the common channel of remotely separated,…

[Phys. Rev. A 94, 032313] Published Wed Sep 14, 2016

]]>The uncertainty principle can be understood as constraining the probability of winning a game in which Alice measures one of two conjugate observables, such as position or momentum, on a system provided by Bob, and he is to guess the outcome. Two variants are possible: either Alice tells Bob which o…

[Phys. Rev. A 94, 032314] Published Wed Sep 14, 2016

]]>Quantum position verification (QPV) is the art of verifying the geographical location of an untrusted party. Recently, it has been shown that the widely studied Bennett & Brassard 1984 (BB84) QPV protocol is insecure after the 3 dB loss point assuming local operations and classical communication (LO…

[Phys. Rev. A 94, 032315] Published Wed Sep 14, 2016

]]>A simple and yet powerful approach for modeling the structure of endohedrally confined diatomic molecules is introduced. The theory, based on a $\mathrm{u}\left(4\right)\oplus \mathrm{u}\left(3\right)$ dynamical algebra, combines $\mathrm{u}\left(4\right)$, the vibron model dynamical algebra, with a $\mathrm{u}\left(3\right)$ dynamical algebra that models a spherically symmetric three-dime…

[Phys. Rev. A 94, 032508] Published Wed Sep 14, 2016

]]>We investigate bond-rearrangement driven by photo-double-ionization (PDI) near and above the double-ionization threshold in a sequence of carbon-carbon double-bonded hydrocarbon molecules: ethylene, fluoroethylene, and 1,1-difluoroethylene. We employ the kinematically complete cold target recoil ion…

[Phys. Rev. A 94, 033412] Published Wed Sep 14, 2016

]]>We report on the production of ultracold heteronuclear YbLi* molecules in a dual-species magneto-optical trap by photoassociation (PA). The formation of the electronically excited molecules close to dissociation was observed by trap loss spectroscopy. We find 4 rovibrational states within a range of…

[Phys. Rev. A 94, 033413] Published Wed Sep 14, 2016

]]>Experiments on quantum degenerate Fermi gases of magnetic atoms and dipolar molecules begin to probe their broken-symmetry phases dominated by the long-range, anisotropic dipole-dipole interaction. Several candidate phases including the $p$-wave superfluid, the stripe density wave, and a supersolid ha…

[Phys. Rev. A 94, 033616] Published Wed Sep 14, 2016

]]>A gas of interacting ultracold fermions can be tuned into a strongly interacting regime using a Feshbach resonance. Here, we theoretically study quasiparticle transport in a system of two reservoirs of interacting ultracold fermions on the BCS side of the BCS-BEC crossover coupled weakly via a tunne…

[Phys. Rev. A 94, 033618] Published Wed Sep 14, 2016

]]>We investigate the pulse partitioning of a 6.3-mJ, 450-fs pulse at 1030 nm to produce plasma channels. At such moderate energies, splitting the energy into several subpulses reduces the ionization efficiency and thus does not extend the plasma lifetime. We numerically show that when sufficient energ…

[Phys. Rev. A 94, 033824] Published Wed Sep 14, 2016

]]>Effective transition between the population-inverted optical eigenmodes of two coupled microcavities carrying mechanical oscillation realizes a phonon analog of optical two-level lasers. By providing an approach that linearizes the dynamical equations of weak nonlinear systems without relying on the…

[Phys. Rev. A 94, 031802(R)] Published Tue Sep 13, 2016

]]>We provide an alternative approach to relativistic dynamics based on the Feshbach projection technique. Instead of directly studying the Dirac equation, we derive a two-component equation for the upper spinor. This approach allows one to investigate the underlying physics in a different perspective.…

[Phys. Rev. A 94, 032111] Published Tue Sep 13, 2016

]]>$R$-matrix-with-time-dependence theory is applied to electron-impact ionization processes for He in the $S$-wave model. Cross sections for electron-impact excitation, ionization, and ionization with excitation processes for impact energies between 25 and 225 eV are in excellent agreement with benchmark …

[Phys. Rev. A 94, 032706] Published Tue Sep 13, 2016

]]>The selection rules of high harmonic generation (HHG) are investigated using three-dimensional time-dependent density functional theory (TDDFT). From the harmonic spectra obtained with various real molecules and different forms of laser fields, several factors that contribute to selection rules are …

[Phys. Rev. A 94, 033410] Published Tue Sep 13, 2016

]]>Molecular wave-packet dynamics in oxygen are studied in the time domain, using a single-color VUV-pump–VUV-probe scheme. 17-fs VUV pulses, centered at 161 nm are generated via high-order harmonic generation driven by an intense 800-nm pulse leading to VUV pulse energies that reach 1.$1\mu \text{J}$ per pulse. A…

[Phys. Rev. A 94, 033411] Published Tue Sep 13, 2016

]]>We study the critical dynamics of matter waves at the three-dimensional Anderson mobility edge in cold-atom disorder quench experiments. General scaling arguments are supported by precision numerics for the spectral function, diffusion coefficient, and localization length in isotropic blue-detuned s…

[Phys. Rev. A 94, 033615] Published Tue Sep 13, 2016

]]>Thermal decoherence is a major obstacle to the realization of quantum coherence for massive mechanical oscillators. Although optical trapping has been used to reduce the thermal decoherence rate for such oscillators, it also increases the rate by subjecting the oscillator to stochastic forces result…

[Phys. Rev. A 94, 033822] Published Tue Sep 13, 2016

]]>We present a scheme to realize electromagnetically induced grating in an ensemble of strongly interacting Rydberg atoms, which act as superatoms due to the dipole blockade mechanism. The ensemble of three-level cold Rydberg-dressed $\left({}^{87}\mathrm{Rb}\right)$ atoms follows a cascade configuration where a strong standing…

[Phys. Rev. A 94, 033823] Published Tue Sep 13, 2016

]]>A logical qubit based on electron-spin singlet-triplet states in a semiconductor double dot has emerged as one of the promising candidates for quantum information processing. Here we propose a systematic method to implement rapid quantum gates in the nanosecond time scale for both a single qubit and…

[Phys. Rev. A 94, 032311] Published Mon Sep 12, 2016

]]>Particle number fluctuations, no matter how small, are present in experimental setups. One should rigorously take these fluctuations into account, especially for entanglement detection. In this context, we generalize the spin-squeezing inequalities introduced by G. Tóth *et al.* [Phys. Rev. Lett. **99**, …

[Phys. Rev. A 94, 032312] Published Mon Sep 12, 2016

]]>Photoinduced reformation of chemical bonds is investigated in the ${\mathrm{CH}}_{3}\mathrm{Cl}$ molecule experimentally and computationally. The observation of stable ${\mathrm{HCl}}^{+}$ fragment formation after resonant Cl $2p$ photoexcitation is confirmed by an electron-ion coincidence experiment, and its possible creation mechanism is r…

[Phys. Rev. A 94, 033409] Published Mon Sep 12, 2016

]]>In recent experiments, the relaxation dynamics of highly oblate, turbulent Bose-Einstein condensates (BECs) was investigated by measuring the vortex decay rates in various sample conditions [Phys. Rev. A **90**, 063627 (2014)] and, separately, the thermal friction coefficient $\alpha $ for vortex motion was mea…

[Phys. Rev. A 94, 033612] Published Mon Sep 12, 2016

]]>We present an observation of zero-to-$\pi $ phase flips induced by Rabi oscillation in an unbalanced Ramsey atom interferometer. The phase shift and visibility are experimentally investigated by modulating either the polarization or duration of Raman lasers, and they are well explained by a theoretical m…

[Phys. Rev. A 94, 033613] Published Mon Sep 12, 2016

]]>We show that the wave function in one spatial sector ${x}_{1}<{x}_{2}<\cdots <{x}_{N}$ (with ${x}_{i}$ being the coordinate of the $i\mathrm{th}$ particle) of a one-dimensional spinor gas with contact $s$-wave interaction, either bosonic or fermionic, can be mapped to the direct product of the wave function of a spinless Fermi gas w…

[Phys. Rev. A 94, 033614] Published Mon Sep 12, 2016

]]>We study the interaction of dielectric rods and disks with the laser field of a high-finesse cavity. The quantum master equation for the coupled particle-cavity dynamics, including Rayleigh scattering, is derived for particle sizes comparable to the laser wavelength. We demonstrate that such anisotr…

[Phys. Rev. A 94, 033818] Published Mon Sep 12, 2016

]]>Recently it was shown that the quantum behavior of an intense cavity field can be revealed by measuring the steady atomic correlations between two ideal atoms which interact with the same leaking cavity mode. Considering a weak atom-field coupling regime and large average number of photons in the ca…

[Phys. Rev. A 94, 033819] Published Mon Sep 12, 2016

]]>We consider light-induced binding and motion of dielectric microparticles in an optical waveguide that gives rise to a backaction effect such as light transmission oscillating with time. Modeling the particles by dielectric slabs allows us to solve the problem analytically and obtain a rich variety …

[Phys. Rev. A 94, 033820] Published Mon Sep 12, 2016

]]>Experiments during the past 2 years have shown strong resonant photon-magnon coupling in microwave cavities, while coupling in the optical regime was demonstrated very recently for the first time. Unlike with microwaves, the coupling in optical cavities is parametric, akin to optomechanical systems.…

[Phys. Rev. A 94, 033821] Published Mon Sep 12, 2016

]]>We investigate the efficiency of quantum adiabatic optimization when overcoming potential barriers to get from a local to a global minimum. Specifically we look at $n$ qubit systems with symmetric cost functions $f:{\{0,1\}}^{n}\to \mathbb{R}$, where the ground state must tunnel through a potential barrier of width ${n}^{\alpha}$ and…

[Phys. Rev. A 94, 032309] Published Fri Sep 09, 2016

]]>The evolution of high-dimensional entanglement in atmospheric turbulence is investigated. We study the effects of turbulence on photonic states generated by spontaneous parametric down-conversion, both theoretically and experimentally. One of the photons propagates through turbulence, while the othe…

[Phys. Rev. A 94, 032310] Published Fri Sep 09, 2016

]]>We propose to realize a strongly interacting Fermi superfluid near a narrow Feshbach resonance using the recently discovered “orbital Feshbach resonance.” The orbital Feshbach resonance is a type of magnetic field tunable scattering resonance theoretically predicted and experimentally observed recen…

[Phys. Rev. A 94, 033609] Published Fri Sep 09, 2016

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