We propose a procedure to obtain exact analytical solutions to the time-dependent Schrödinger equations involving explicit time-dependent Hermitian Hamiltonians from solutions to time-independent non-Hermitian Hamiltonian systems and the time-dependent Dyson relation, together with the time-dependen…

[Phys. Rev. A 95, 010102(R)] Published Tue Jan 17, 2017

]]>A dramatic symmetry breaking in $K$-shell photoionization of the ${\mathrm{CF}}_{4}$ molecule in which a core-hole vacancy is created in one of four equivalent fluorine atoms is displayed in the molecular frame angular distribution of the photoelectrons. Observing the photoejected electron in coincidence with an ${\mathrm{F}}^{+}$ a…

[Phys. Rev. A 95, 011401(R)] Published Tue Jan 17, 2017

]]>We describe a compact and reliable method to calculate the Fisher information for the estimation of a dynamical parameter in a continuously measured linear Gaussian quantum system. Unlike previous methods in the literature, which involve the numerical integration of a stochastic master equation for …

[Phys. Rev. A 95, 012116] Published Tue Jan 17, 2017

]]>We investigate the role of coarsened measurement reference, which originates from the coarsened reference time and basis, in quantum metrology. When the measurement is based on one common reference basis, the disadvantage of coarsened measurement can be removed by symmetry. Owing to the coarsened re…

[Phys. Rev. A 95, 012117] Published Tue Jan 17, 2017

]]>The eigenstates of complementary observables play an elementary role in quantum physics. Here the concept of unextendible sets of complementary observables is analyzed and a practical application in witnessing physical properties, such as the degree of purity of a state, is described.

[Phys. Rev. A 95, 012118] Published Tue Jan 17, 2017

]]>We uncover a superscattering behavior of a pseudospin-1 wave from weak scatterers in the subwavelength regime where the scatterer size is much smaller than the wavelength. The phenomenon manifests itself as unusually strong scattering characterized by extraordinarily large values of the cross sectio…

[Phys. Rev. A 95, 012119] Published Tue Jan 17, 2017

]]>The out-of-time-ordered correlator (OTOC) diagnoses quantum chaos and the scrambling of quantum information via the spread of entanglement. The OTOC encodes forward and reverse evolutions and has deep connections with the flow of time. So do fluctuation relations such as Jarzynski's equality, derive…

[Phys. Rev. A 95, 012120] Published Tue Jan 17, 2017

]]>We analyze the problem of how different ground states associated with the same set of Hamiltonian parameters evolve after a sudden quench. To realize our analysis we define a quantitative approach to the local distinguishability between different ground states of a magnetically ordered phase in term…

[Phys. Rev. A 95, 012121] Published Tue Jan 17, 2017

]]>An exact canonical master equation of the Lindblad form is derived for a central spin interacting uniformly with a sea of completely unpolarized spins. The Kraus operators for the dynamical map are also derived. The non-Markovianity of the dynamics in terms of the divisibility breaking of the dynami…

[Phys. Rev. A 95, 012122] Published Tue Jan 17, 2017

]]>We discuss the data-pattern tomography for reconstruction of entangled states of light. We show that for a moderate number of probe coherent states it is possible to achieve high accuracy of representation not only for single-mode states but also for two-mode entangled states. We analyze the stabili…

[Phys. Rev. A 95, 012123] Published Tue Jan 17, 2017

]]>We develop a comprehensive framework to model and optimize the performance of continuous-variable quantum key distribution (CV-QKD) with a local local oscillator (LLO), when phase reference sharing and QKD are jointly implemented. We first analyze the limitations of the only existing approach, calle…

[Phys. Rev. A 95, 012316] Published Tue Jan 17, 2017

]]>The calculation of triple-differential cross sections for the electron-impact ionization of $10{a}^{\prime}$ and $2{a}^{\prime \prime}$ orbitals of the formic acid (HCOOH) molecule has been carried out by the multicenter distorted-wave method. The coplanar asymmetric kinematics is considered at incident energies of 100 and $250\phantom{\rule{0.16em}{0ex}}\text{eV}$…

[Phys. Rev. A 95, 012703] Published Tue Jan 17, 2017

]]>Motivated by experiments with cold atoms, we investigate a mobile impurity immersed in a Fermi sea in three dimensions at zero temperature by means of the functional renormalization group. We first perform the derivative expansion of the effective action to calculate the ground-state energy and Tan'…

[Phys. Rev. A 95, 013612] Published Tue Jan 17, 2017

]]>We investigate the zero-temperature metal-insulator transition in a one-dimensional two-component Fermi gas in the presence of a quasiperiodic potential resulting from the superposition of two optical lattices of equal intensity but incommensurate periods. A mobility edge separating (low-energy) And…

[Phys. Rev. A 95, 013613] Published Tue Jan 17, 2017

]]>We demonstrate how quantum interference may lead to the appearance of robust edgelike states of a single ultracold atom in a two-dimensional optical ribbon. We show that these states can be engineered within the manifold of either local ground states of the sites forming the ribbon or states carryin…

[Phys. Rev. A 95, 013614] Published Tue Jan 17, 2017

]]>Topological phase imprinting is a well-established technique for deterministic vortex creation in spinor Bose-Einstein condensates of alkali-metal atoms. It was recently shown that counterdiabatic quantum control may accelerate vortex creation in comparison to the standard adiabatic protocol and sup…

[Phys. Rev. A 95, 013615] Published Tue Jan 17, 2017

]]>We calculate the emission spectra, the Glauber ${g}^{\left(2\right)}$ function, and the entanglement of formation for two-level emitters coupled to a single cavity mode and subject to an external laser excitation. To evaluate these quantities we couple the system to environmental degrees of freedom, which leads to di…

[Phys. Rev. A 95, 013825] Published Tue Jan 17, 2017

]]>Quantum weak measurement, measuring some observable quantities within the selected subensemble of the entire quantum ensemble, can produce many interesting results such as the superluminal phenomena. An outcome of such a measurement is the weak value which has been applied to amplify some weak signa…

[Phys. Rev. A 95, 012114] Published Fri Jan 13, 2017

]]>We present a detailed derivation of the master equation describing a general time-dependent quantum system with classical Poisson white noise and outline its various properties. We discuss the limiting cases of Poisson white noise and provide approximations for the different noise strength regimes. …

[Phys. Rev. A 95, 012115] Published Fri Jan 13, 2017

]]>A detailed analysis of the quantum Fisher information (QFI) and spin squeezing (SS) of the non-Hermitian one-axis twisting model is conducted. The results show that the non-Hermitian model achieves significant entanglement in many-body systems, which is quite different from the Hermitian case, and a…

[Phys. Rev. A 95, 013824] Published Fri Jan 13, 2017

]]>We derive laws for the distribution of quantum steering among different parties in multipartite Gaussian states under Gaussian measurements. We prove that a monogamy relation akin to the generalized Coffman-Kundu-Wootters inequality holds quantitatively for a recently introduced measure of Gaussian …

[Phys. Rev. A 95, 010101(R)] Published Thu Jan 12, 2017

]]>A driven anharmonic quantum oscillator is experimentally realized with collective superposition states of an interacting two-component Bose-Einstein condensate. Probing delicate quantum fluctuations during the dynamics of the system allowed the researchers to observe the emergence of stable and unstable fixed points as predicted by the Poincare-Birkhoff theorem.

[Phys. Rev. A 95, 011602(R)] Published Thu Jan 12, 2017

]]>Physical principles constrain the way nonlocal correlations can be distributed among distant parties in a Bell-type experiment. These constraints are usually expressed by monogamy relations that bound the amount of Bell inequality violation observed by a set of parties by the violation observed by a…

[Phys. Rev. A 95, 012113] Published Thu Jan 12, 2017

]]>We propose a scheme to read out the spin of a single electron quantum bit in a surface Paul trap using oscillating magnetic-field gradients. The readout sequence is composed of cooling, driving, amplification, and detection of the electron's motion. We study the scheme in the presence of noise and t…

[Phys. Rev. A 95, 012312] Published Thu Jan 12, 2017

]]>The thermal operations framework developed in past works is used to model the evolution of microscopic quantum systems in contact with thermal baths. Here we extend this model to bipartite devices with one part acting as a control external to the system-bath setup. We define the operations of such h…

[Phys. Rev. A 95, 012313] Published Thu Jan 12, 2017

]]>We investigate the determination of a Hamiltonian parameter in a quantum system undergoing continuous measurement. We demonstrate a computationally rapid method to estimate an unknown and possibly time-dependent parameter, where we maximize the likelihood of the observed stochastic readout. By deali…

[Phys. Rev. A 95, 012314] Published Thu Jan 12, 2017

]]>The need for secrecy and security is essential in communication. Secret sharing is a conventional protocol to distribute a secret message to a group of parties, who cannot access it individually but need to cooperate in order to decode it. While several variants of this protocol have been investigat…

[Phys. Rev. A 95, 012315] Published Thu Jan 12, 2017

]]>We present a fully relativistic investigation of the radiative recombination of a twisted electron with a bare heavy nucleus. The twisted electron is described by the wave function which accounts for the interaction with the nucleus in all orders in $\alpha Z$. We use this wave function to derive the probab…

[Phys. Rev. A 95, 012702] Published Thu Jan 12, 2017

]]>We investigate the spin-polarized chain of ultracold alkaline-earth-metal atoms with spin-3/2 described by the fermionic Hubbard model with SU(4) symmetric attractive interaction. The competition of bound pairs, trions, quartets, and unbound atoms is studied analytically and by density-matrix renorm…

[Phys. Rev. A 95, 013610] Published Thu Jan 12, 2017

]]>Neutral helium microscopy is a new technique currently under development. Its advantages are the low energy, charge neutrality, and inertness of the helium atoms, a potential large depth of field, and the fact that at thermal energies the helium atoms do not penetrate into any solid material. This o…

[Phys. Rev. A 95, 013611] Published Thu Jan 12, 2017

]]>[Phys. Rev. A 95, 019902] Published Thu Jan 12, 2017

]]>The are several nonequivalent notions of Markovian quantum evolution. In this paper we show that the one based on the so-called CP divisibility of the corresponding dynamical map enjoys the following stability property: the dynamical map ${\mathrm{\Lambda}}_{t}$ is CP divisible if and only if the second tensor power ${\mathrm{\Lambda}}_{t}\otimes {\mathrm{\Lambda}}_{\dots}$

[Phys. Rev. A 95, 012112] Published Wed Jan 11, 2017

]]>We theoretically investigate the performance of multiphoton catalysis applied on the two-mode squeezed state by examining the entropy of entanglement, logarithmic negativity, Eistein-Podolsky-Rosen (EPR), and Hillery-Zubairy (HZ) correlations, and the fidelity of teleportation. It is found that the …

[Phys. Rev. A 95, 012310] Published Wed Jan 11, 2017

]]>Fixed-point quantum search algorithms succeed at finding one of $M$ target items among $N$ total items even when the run time of the algorithm is longer than necessary. While the famous Grover's algorithm can search quadratically faster than a classical computer, it lacks the fixed-point property—the fr…

[Phys. Rev. A 95, 012311] Published Wed Jan 11, 2017

]]>We report on an all-optical production of a ${}^{87}\mathrm{Rb}$ Bose-Einstein condensate (BEC) of ${10}^{6}$ atoms. We construct a double compressible crossed dipole trap (DCDT) formed by a high-power multimode fiber laser (MCDT) and a single-mode fiber amplifier (SCDT), which are both operated at $1.06\phantom{\rule{0.28em}{0ex}}\mu \mathrm{m}$. A very cold den…

[Phys. Rev. A 95, 013609] Published Wed Jan 11, 2017

]]>We show that the operational definition of nonclassicality of a quantum state depends on the motion of the observer. We use the relativistic Unruh-DeWitt detector model to witness nonclassicality of the probed field state. It turns out that the witness based on the properties of the $P$ representation…

[Phys. Rev. A 95, 013817] Published Wed Jan 11, 2017

]]>We consider slow-light propagation in an atomic medium with a tripod level scheme. We show that the coexistence of two types of dark-state polaritons leads to the propagation dynamics, which is qualitatively different from that in a $\mathrm{\Lambda}$ medium, and allows therefore for very efficient conversion of sig…

[Phys. Rev. A 95, 013818] Published Wed Jan 11, 2017

]]>We investigate the quantum phase transition (QPT) and quench dynamics in the anisotropic Rabi model when the ratio of the qubit transition frequency to the oscillator frequency approaches infinity. Based on the Schrieffer-Wolff transformation, we find an anti-Hermitian operator that maps the origina…

[Phys. Rev. A 95, 013819] Published Wed Jan 11, 2017

]]>Quantum mechanics allows paraparticles with mixed Bose-Fermi statistics that have not been experimentally confirmed. We propose a trapped-ion scheme whose effective dynamics are equivalent to a driven para-Bose oscillator of even order. Our mapping suggest highly entangled vibrational and internal i…

[Phys. Rev. A 95, 013820] Published Wed Jan 11, 2017

]]>We study here fractional orbital-angular-momentum (OAM) states in electron vortex beams (EVBs) from the perspective of the geometric phase. We consider the skyrmionic model of an electron, where it is depicted as a scalar electron orbiting around the vortex line, which gives rise to the spin degrees…

[Phys. Rev. A 95, 013821] Published Wed Jan 11, 2017

]]>A densely arranged grid of absolute optical instruments, namely Eaton and invisible lenses, provides a photonic crystal with properties that are the opposite of its tiny constituents. The band structure of the photonic crystal dictates the wavelengths that are reflected or transmitted.

[Phys. Rev. A 95, 013822] Published Wed Jan 11, 2017

]]>A usual assumption in quantum estimation is that the unknown parameter labels the possible states of the system, while it influences neither the sample space of outcomes nor the measurement aimed at extracting information on the parameter itself. This assumption is crucial to prove the quantum Cramé…

[Phys. Rev. A 95, 012111] Published Tue Jan 10, 2017

]]>We study the Ising Hamiltonian with a transverse field term to simulate the quantum annealing. Using shortcuts to adiabaticity, we design the time dependence of the Hamiltonian. The dynamical invariant is obtained by the mean-field ansatz, and the Hamiltonian is designed by the inverse engineering. …

[Phys. Rev. A 95, 012309] Published Tue Jan 10, 2017

]]>Attosceond time delays of photoelectrons released from different fine-structure states are measured experimentally, which provides fine-grained information that may help to reveal the electronic structure of atoms in greater detail.

[Phys. Rev. A 95, 013404] Published Tue Jan 10, 2017

]]>The formulation of the interaction of matter with singular light fields needs special care. In a recent article [G. F. Quinteiro *et al.*, Phys. Rev. A **91**, 033808 (2015)] we have shown that the Hamiltonian describing the interaction of a twisted-light beam having parallel orbital and spin angular mom…

[Phys. Rev. A 95, 012106] Published Mon Jan 09, 2017

]]>As a fundamental postulate of quantum mechanics, Born's rule assigns probabilities to the measurement outcomes of quantum systems and excludes multiorder quantum interference. Here we report an experiment on a single spin in diamond to test Born's rule by inspecting the third-order quantum interfere…

[Phys. Rev. A 95, 012107] Published Mon Jan 09, 2017

]]>Nonlinear QED interactions induce different polarization properties on a given probe beam. We consider the polarization effects caused by the photon-photon interaction in laser experiments, when a laser beam propagates through a constant magnetic field or collides with another laser beam. We solve t…

[Phys. Rev. A 95, 012108] Published Mon Jan 09, 2017

]]>We analyze the performance of quantum parameter estimation in the presence of the most general Gaussian dissipative reservoir. We derive lower bounds on the precision of phase estimation and a closely related problem of frequency estimation. For both problems we show that it is impossible to achieve…

[Phys. Rev. A 95, 012109] Published Mon Jan 09, 2017

]]>The theory of majorization and its variants, including thermomajorization, have been found to play a central role in the formulation of many physical resource theories, ranging from entanglement theory to quantum thermodynamics. Here we formulate the framework of quantum relative Lorenz curves, and …

[Phys. Rev. A 95, 012110] Published Mon Jan 09, 2017

]]>Tight-binding lattice models allow the creation of bound composite objects which, in the strong-interacting regime, are protected against dissociation. We show that a local impurity in the lattice potential can generate a coherent split of an incoming bound particle wave packet which consequently pr…

[Phys. Rev. A 95, 012307] Published Mon Jan 09, 2017

]]>The primary goal in the study of entanglement as a resource theory is to find conditions that determine when one quantum state can or cannot be transformed into another via local operations and classical communication operations. This is typically done through entanglement monotones or conversion wi…

[Phys. Rev. A 95, 012308] Published Mon Jan 09, 2017

]]>We used ultrashort femtosecond vacuum ultraviolet (VUV) and infrared (IR) pulses in a pump-probe scheme to map the dynamics and nonequilibrium dissociation channels of excited neutral ${\text{H}}_{2}$ molecules. A nuclear wave packet is created in the $B\phantom{\rule{0.16em}{0ex}}{}^{1}\mathrm{\Sigma}_{u}^{+}$ state of the neutral ${\text{H}}_{2}$ molecule by absorption of the ni…

[Phys. Rev. A 95, 012501] Published Mon Jan 09, 2017

]]>Combined experimental and theoretical studies on the electric dipole moment of the electron (eEDM) can probe energy scales of a few TeV to PeV. The possible existence of the eEDM gives rise to an experimentally observed energy shift, which is proportional to the effective electric field $\left({E}_{\mathrm{eff}}\right)$ of a …

[Phys. Rev. A 95, 012502] Published Mon Jan 09, 2017

]]>We study the vortex-bright solitons in a quasi-two-dimensional spin-orbit-coupled (SO-coupled) hyperfine spin-1 three-component Bose-Einstein condensate using variational method and numerical solution of a mean-field model. The ground state of these vortex-bright solitons is radially symmetric for w…

[Phys. Rev. A 95, 013608] Published Mon Jan 09, 2017

]]>We study the tunable photonic distribution in an optical molecule consisting of two linearly coupled single-mode cavities. With the intercavity coupling and two driving fields, the energy levels of the optical-molecule system form a closed cyclic energy-level diagram, and the phase difference betwee…

[Phys. Rev. A 95, 013815] Published Mon Jan 09, 2017

]]>In this contribution we introduce a strategy for the compensation of plasmonic losses based on a recently proposed nonlinear mechanism: the resonant interaction between surface plasmon polaritons and spatial solitons propagating in parallel along a metal/dielectric/Kerr structure. This mechanism nat…

[Phys. Rev. A 95, 013816] Published Mon Jan 09, 2017

]]>[Phys. Rev. A 95, 019901] Published Mon Jan 09, 2017

]]>We perform electromagnetic wave simulations of fully three-dimensional optical limaçon microcavities, on the basis of their future applications in microlasers and photonic devices. The analysis of the three-dimensional modes and far fields reveals an increase of the quality factors as compared to th…

[Phys. Rev. A 95, 011801(R)] Published Fri Jan 06, 2017

]]>Postselection strategies have been proposed with the aim of amplifying weak signals, which may help to overcome detection thresholds associated with technical noise in high-precision measurements. Here we use an optical setup to experimentally explore two different postselection protocols for the es…

[Phys. Rev. A 95, 012104] Published Fri Jan 06, 2017

]]>Quantum systems can display particle- or wavelike properties, depending on the type of measurement that is performed on them. The Bell-state quantum eraser is an experiment that brings the duality to the forefront, as a single measurement can retroactively be made to measure particlelike or wavelike…

[Phys. Rev. A 95, 012105] Published Fri Jan 06, 2017

]]>The implementation of a scalable quantum computer requires quantum error correction (QEC). An important step toward this goal is to demonstrate the effectiveness of QEC where the fidelity of an encoded qubit is higher than that of the physical qubits. Therefore, it is important to know the condition…

[Phys. Rev. A 95, 012306] Published Fri Jan 06, 2017

]]>An experimental scheme is proposed to manipulate the motional states of an array of trapped neutral atoms by Rydberg dressing, which allows squeezing and entanglement creation in the relative or center-of-mass motions of atoms in a chain.

[Phys. Rev. A 95, 013403] Published Fri Jan 06, 2017

]]>In this paper, the Bose-Hubbard model (BHM) with the nearest-neighbor (NN) repulsions is studied from the viewpoint of possible bosonic analogs of the fractional quantum Hall (FQH) state in the vicinity of the Mott insulator (MI). First, by means of the Gutzwiller approximation, we obtain the phase …

[Phys. Rev. A 95, 013607] Published Fri Jan 06, 2017

]]>We theoretically explore the quantum correlation properties of a dissipative Bose-Hubbard dimer in the presence of a coherent drive. In particular, we focus on the regime where the semiclassical theory predicts a bifurcation with a spontaneous spatial symmetry breaking. The critical behavior in a we…

[Phys. Rev. A 95, 013812] Published Fri Jan 06, 2017

]]>It has been proposed and demonstrated that lasing and coherent perfect absorption (CPA or “antilasing”) coexist in parity-time ($\mathcal{PT}$) symmetric photonic systems. In this work we show that the spectral signature of such a CPA laser displayed by the singular value spectrum of the scattering matrix ($S$) c…

[Phys. Rev. A 95, 013813] Published Fri Jan 06, 2017

]]>The classical radio-frequency antenna theory indicates that large cross sections can be realized through directional radiation. In this paper, a similar principle is applied in quantum systems, in which quantum antennas, constructed by a cluster of quantum two-level systems, explore the collective e…

[Phys. Rev. A 95, 013814] Published Fri Jan 06, 2017

]]>In quantum sensing and metrology, an important class of measurement is the continuous linear measurement, in which the detector is coupled to the system of interest linearly and continuously in time. One key aspect involved is the quantum noise of the detector, arising from quantum fluctuations in t…

[Phys. Rev. A 95, 012103] Published Thu Jan 05, 2017

]]>We show that one can determine both parameters of a displacement acting on an oscillator with an accuracy which scales inversely with the square root of the number of photons in the oscillator. Our results are obtained by using a grid state as a sensor state for detecting small translations in phase…

[Phys. Rev. A 95, 012305] Published Thu Jan 05, 2017

]]>From the analysis of the relaxation process of isolated lattice many-body quantum systems quenched far from equilibrium, we deduce a criterion for predicting when they are certain to thermalize. It is based on the algebraic behavior $\propto {t}^{-\gamma}$ of the survival probability at long times. We show that the va…

[Phys. Rev. A 95, 013604] Published Thu Jan 05, 2017

]]>We study the ground state and the thermal phase diagram of a two-species Bose-Hubbard model, with $\text{U}\left(1\right)\times {\mathbb{Z}}_{2}$ symmetry, describing atoms and molecules on a two-dimensional optical lattice interacting via a Feshbach resonance. Using quantum Monte Carlo simulations and mean-field theory, we show that the …

[Phys. Rev. A 95, 013606] Published Thu Jan 05, 2017

]]>Theoretical studies and experimental implementations of quantum correlation are the important contents of continuous variables quantum optics and quantum information science. There are various systems for the study of quantum correlation. Here, we study an experimental scheme for generating three qu…

[Phys. Rev. A 95, 013811] Published Thu Jan 05, 2017

]]>A detailed analysis of the performance and required resources for an all-photonic quantum repeater architecture is presented. It is shown how to significantly outperform the bit rate achievable by any repeaterless direct-transmission protocol despite various device losses, and also dramatically decrease the number of required photon sources.

[Phys. Rev. A 95, 012304] Published Wed Jan 04, 2017

]]>We present an extensive study of two-dimensional Larkin-Ovchinnikov (LO) superfluidity in a spin-imbalanced two-component atomic Fermi gas. In the context of Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) phase, we explore a wide and generic class of pairing gap functions with explicit spatial dependency. …

[Phys. Rev. A 95, 013603] Published Wed Jan 04, 2017

]]>We observe spin squeezing in three-component Bose gases where all three hyperfine states are coupled by synthetic spin-orbit coupling. This phenomenon is a direct consequence of spin-orbit coupling, as can be seen clearly from an effective spin Hamiltonian. By solving this effective model analytical…

[Phys. Rev. A 95, 013605] Published Wed Jan 04, 2017

]]>We theoretically investigated the mechanism of two-mode quadrature squeezing in a regime of four-wave mixing in a $\mathrm{\Lambda}$ scheme of three-level atoms embedded in a thermal reservoir. We demonstrated that the process of nonlinear transfer of noise from the low frequency of ground state splitting to the opt…

[Phys. Rev. A 95, 013807] Published Wed Jan 04, 2017

]]>Under the Dirichlet boundary conditions, a family of bright quadratic solitons exists in the regime where the second harmonic can be regarded as the refractive index of the fundamental wave with an oscillatory nonlocal response. By simplifying the governing equations into the Snyder-Mitchell mode, t…

[Phys. Rev. A 95, 013808] Published Wed Jan 04, 2017

]]>We examine the photonic spin Hall effect (SHE) in a graphene-substrate system with the presence of an external magnetic field. In the quantum Hall regime, we demonstrate that the in-plane and transverse spin-dependent splittings in the photonic SHE exhibit different quantized behaviors. The quantize…

[Phys. Rev. A 95, 013809] Published Wed Jan 04, 2017

]]>We report a spin-orbit-coupling-induced backaction cooling in an optomechanical system, composed of a spin-orbit-coupled Bose-Einstein condensate trapped in an optical cavity with one movable end mirror, by suppressing heating effects of quantum noises. The collective density excitations of the spin…

[Phys. Rev. A 95, 013810] Published Wed Jan 04, 2017

]]>Exact solutions for local equilibrium and nonequilibrium out-of-time-ordered correlation (OTOC) functions are obtained for a lattice fermion model with on-site interactions, namely, the Falicov-Kimball (FK) model, in the large dimensional and thermodynamic limit. Our approach is based on the nonequi…

[Phys. Rev. A 95, 011601(R)] Published Tue Jan 03, 2017

]]>It is found that the differential cross section of photon-photon scattering is a function of the degree of polarization entanglement of the two-photon state. A reduced general expression for the differential cross section of photon-photon scattering is derived by applying simple symmetry arguments. …

[Phys. Rev. A 95, 012101] Published Tue Jan 03, 2017

]]>We reconstruct the explicit formalism of qubit quantum theory from elementary rules on an observer's information acquisition. Our approach is purely operational: we consider an observer $O$ interrogating a system $S$ with binary questions and define $S$'s state as $O$'s “catalog of knowledge” about $S$. From …

[Phys. Rev. A 95, 012102] Published Tue Jan 03, 2017

]]>Quantum key distribution (QKD) generates symmetric keys between two remote parties and guarantees the keys are not accessible to any third party. Wavelength-division multiplexing between QKD and classical optical communications by sharing the existing fiber-optics infrastructure is highly desired in…

[Phys. Rev. A 95, 012301] Published Tue Jan 03, 2017

]]>Adaptive measurements were recently shown to significantly improve the performance of quantum state tomography. Utilizing information about the system for the online choice of optimal measurements allows one to reach the ultimate bounds of precision for state reconstruction. In this article we gener…

[Phys. Rev. A 95, 012302] Published Tue Jan 03, 2017

]]>We investigate measurement-based quantum communication with noisy resource states that are generated by entanglement purification. We consider the transmission of encoded information via noisy quantum channels using a measurement-based implementation of encoding, error correction, and decoding. We s…

[Phys. Rev. A 95, 012303] Published Tue Jan 03, 2017

]]>We study the association and dissociation dynamics of weakly bound heteronuclear Feshbach molecules using transverse radio-frequency fields for expected parameters accessible through the microgravity environment of NASA's Cold Atom Laboratory (CAL) aboard the International Space Station, including s…

[Phys. Rev. A 95, 012701] Published Tue Jan 03, 2017

]]>We experimentally study a system of quantum kicked rotors—an ensemble of diatomic molecules exposed to a periodic sequence of ultrashort laser pulses. In the regime where the underlying classical dynamics is chaotic, we investigate the quantum phenomenon of dynamical localization by means of state-r…

[Phys. Rev. A 95, 013401] Published Tue Jan 03, 2017

]]>Nonsequential double ionization is characterized by a knee structure in the plot of double-ionization probability versus laser intensity. In circularly polarized (CP) laser fields, this structure has only been observed for Mg atoms. By choosing laser fields according to a scaling law, we exhibit the…

[Phys. Rev. A 95, 013402] Published Tue Jan 03, 2017

]]>We explore the trap profiles of a two-dimensional atomic Fermi gas in the presence of a Rashba spin-orbit coupling and under an adiabatic rotation. We first consider a noninteracting gas and show that the competition between the effects of Rashba coupling on the local density of single-particle stat…

[Phys. Rev. A 95, 013601] Published Tue Jan 03, 2017

]]>The coupling of spins to long-wavelength bosonic modes is a prominent means to engineer long-range spin-spin interactions, and has been realized in a variety of platforms, such as atoms in optical cavities and trapped ions. To date, much of the experimental focus has been on the realization of long-…

[Phys. Rev. A 95, 013602] Published Tue Jan 03, 2017

]]>In this paper, we examined a possibility of preservation of a substantially multimode radiation in a single cell of quantum memory. As a light source we considered a synchronously pumped optical parametric oscillator (SPOPO). As was shown in several studies, SPOPO radiation has a large number of the…

[Phys. Rev. A 95, 013801] Published Tue Jan 03, 2017

]]>We present a family of self-accelerating stable pulses propagating in optical fiber and connecting a slowly-modulated quasi-cw background to an unstable zero level. Such solutions represent a generalization of the self-accelerating Airy beams observed in the linear regime to a nonlinear dissipative…

[Phys. Rev. A 95, 013802] Published Tue Jan 03, 2017

]]>The radiation emitted by a classically pumped three-level $\mathrm{\Lambda}$-type emitter in a resonator cavity featuring both radiative and unwanted losses is studied. In particular, the efficiency of one-photon Fock state excitation of the outgoing wave packet and the spatiotemporal shape of the wave packet are in…

[Phys. Rev. A 95, 013803] Published Tue Jan 03, 2017

]]>We study the optical response of a resonant medium possessing nonlinear coupling to an external field driven by a few-cycle pump pulse sequence. We demonstrate the possibility of directly producing unipolar half-cycle pulses from the medium possessing an arbitrary nonlinearity, by choosing the prope…

[Phys. Rev. A 95, 013804] Published Tue Jan 03, 2017

]]>We consider frequency comb generation in dispersive singly resonant second-harmonic-generation cavity systems. Using a single temporal mean-field equation for the fundamental field that features a noninstantaneous nonlinear response function, we model the temporal and spectral dynamics and analyze c…

[Phys. Rev. A 95, 013805] Published Tue Jan 03, 2017

]]>Unidirectional invisibility of a $\mathcal{P}\mathcal{T}$-symmetric optical system is of great interest, but challenging as well since it is infeasible to fulfill it through wide optical frequency ranges in all angular directions. Accordingly we study reflectionless and invisible patterns in the TE and TM modes of an opt…

[Phys. Rev. A 95, 013806] Published Tue Jan 03, 2017

]]>A technique of trapping and cooling atoms is experimentally demonstrated with an optical microtrap created in the near field of optical nanofibers, which makes an important step forward in the development of nanostructure-based interfaces for interrogating and manipulating cold atoms.

[Phys. Rev. A 94, 061401(R)] Published Fri Dec 30, 2016

]]>Einstein–Podolsky–Rosen (EPR) steering allows Alice to remotely prepare a state in some specific bases for Bob through her choice of measurements. The temporal analog of EPR steering, temporal steering, also reveals the steerability of a single system between different times. Focusing on a four-dime…

[Phys. Rev. A 94, 062126] Published Fri Dec 30, 2016

]]>We study the dynamics of a bipartite quantum system in a way such that its formal description keeps holding even if one of its parts becomes macroscopic; the problem is related to the analysis of the quantum-to-classical crossover, but our approach implies that the whole system stays genuinely quant…

[Phys. Rev. A 94, 062127] Published Fri Dec 30, 2016

]]>In quantum information processing, it is important to witness the entropy of the message in the device-independent way which was proposed recently [R. Chaves, J. B. Brask, and N. Brunner, Phys. Rev. Lett. **115**, 110501 (2015)]. In this paper, we theoretically obtain the minimal quantum entropy for thr…

[Phys. Rev. A 94, 062340] Published Fri Dec 30, 2016

]]>We study a three-body system, formed by a light particle and two identical heavy dipoles, in two dimensions in the Born-Oppenheimer approximation. We present the analytic light-particle wave function resulting from an attractive zero-range potential between the light and each of the heavy particles.…

[Phys. Rev. A 94, 062707] Published Fri Dec 30, 2016

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