Results for "Y. -M. He"

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Marginal Estimation of Parameter Driven Binomial Time Series ModelsJun 03 2016This paper develops asymptotic theory for estimation of parameters in regression models for binomial response time series where serial dependence is present through a latent process. Use of generalized linear model (GLM) estimating equations leads to ... More
Testing for Serial Dependence in Binomial Time Series I: Parameter Driven ModelsJun 03 2016Binomial time series in which the logit of the probability of success is modelled as a linear function of observed regressors and a stationary latent Gaussian process are considered. Score tests are developed to first test for the existence of a latent ... More
Genuine multipartite Einstein-Podolsky-Rosen steeringDec 11 2012Feb 17 2014We develop the concept of genuine N-partite Einstein-Podolsky-Rosen (EPR) steering. This nonlocality is the natural multipartite extension of the original EPR paradox. Useful properties emerge that are not guaranteed for genuine multipartite entangled ... More
Towards an Einstein-Podolsky-Rosen paradox between two macroscopic atomic ensembles at room temperatureOct 28 2013Experiments have reported the entanglement of two spatially separated macroscopic atomic ensembles at room temperature (Krauter et al 2011 Phys. Rev. Lett. 107 080503; Julsgaard et al 2001 Nature 413 400). We show how an Einstein-Podolsky-Rosen (EPR) ... More
Detecting Serial Dependence in Binomial Time Series II: Observation Driven ModelsJun 03 2016The detection of serial dependence in binary or binomial valued time series is difficult using standard time series methods, particularly when there are regression effects to be modelled. In this paper we derive score-type tests for detecting departures ... More
Einstein-Podolsky-Rosen paradox and quantum steering in pulsed optomechanicsNov 08 2012Oct 30 2013We describe how to generate an Einstein-Podolsky-Rosen (EPR) paradox between a mesoscopic mechanical oscillator and an optical pulse. We find two types of paradox, defined by whether it is the oscillator or the pulse that shows the effect Schrodinger ... More
Evaluation of the particle numbers via the two root mean square radii in a 2-species Bose-Einstein condensateJul 06 2017The coupled Gross-Pitaevskii equations for two-species BEC have been solved analytically under the Thomas-Fermi approximation (TFA). Based on the analytical solution, two formulae are derived to relate the particle numbers $N_A$ and $N_B$ with the root ... More
Asymptotic expressions for the hyperfine populations in the ground state of spin-1 condensates against a magnetic fieldSep 18 2015Based on the perturbation theory up to the second order, analytical asymptotic expressions for the variation of the population of hyperfine component $\mu=0 $ particles in the ground state of spin-1 condensates against a magnetic field $B$ has been derived. ... More
Generalized Gross-Pitaevskii equation adapted to the $U(5)\supset SO(5)\supset SO(3)$ symmetry for spin-2 condensatesJan 12 2015A generalized Gross-Pitaevskii equation adapted to the $U(5)\supset SO(5)\supset SO(3)$ symmetry has been derived and solved for the spin-2 condensates. The spin-textile and the degeneracy of the ground state (g.s.) together with the factors affecting ... More
Variation of the spin textures of 2-species spin-1 condensates studied beyond the single spatial mode approximation and the experimental identification of these texturesSep 18 2018Nov 04 2018Based on the numerical solutions of the coupled Gross-Pitaevskii equations, the spin-textures of a Bose-Einstein condensate with two kinds of spin-1 atoms have been studied. Besides, the probability densities of an atom in spin component $\mu$ and of ... More
Graphene on metal surface: gap opening and n-dopingDec 25 2007Graphene grown on metal surface, Cu(111), with a boron nitride(BN) buffer layer is studied for the first time. Our first-principles calculations reveal that charge is transferred from the copper substrate to graphene through the BN buffer layer which ... More
Singularity in the matrix of the coupled Gross-Pitaevskii equations and the related state-transitions in three-species condensatesJul 02 2017An approach is proposed to solve the coupled Gross-Pitaevskii equations (CGP) of the 3-species BEC in an analytical way under the Thomas-Fermi approximation (TFA). It was found that, when the strength of a kind of interaction increases and crosses over ... More
Criticality and hidden criticality in multi-species Bose-Einstein condensatesOct 28 2017A general approach is proposed to solve the coupled Gross-Pitaevskii equations (CGP) for K-species Bose-Einstein condensates (BEC). Analytical solutions have been obtained under the Thomas-Fermi approximation. We aim at finding out the common features ... More
Entanglement and nonlocality in multi-particle systemsDec 02 2011Entanglement, the Einstein-Podolsky-Rosen (EPR) paradox and Bell's failure of local-hidden-variable (LHV) theories are three historically famous forms of "quantum nonlocality". We give experimental criteria for these three forms of nonlocality in multi-particle ... More
Pomeranchuk effect and spin-gradient cooling of Bose-Bose mixtures in an optical latticeSep 02 2011Mar 20 2012We theoretically investigate finite-temperature thermodynamics and demagnetization cooling of two-component Bose-Bose mixtures in a cubic optical lattice, by using bosonic dynamical mean field theory (BDMFT). We calculate the finite-temperature phase ... More
Synchronous Quantum Memories with Time-symmetric PulsesJan 19 2009We propose a dynamical approach to quantum memories using a synchronous oscillator-cavity model, in which the coupling is shaped in time to provide the optimum interface to a symmetric input pulse. This overcomes the known difficulties of achieving high ... More
First limits on the occurrence rate of short-period planets orbiting brown dwarfsSep 16 2016Planet formation theories predict a large but still undetected population of short-period terrestrial planets orbiting brown dwarfs. Should specimens of this population be discovered transiting relatively bright and nearby brown dwarfs, the Jupiter-size ... More
Electronic Structures of Quantum Dots and the Ultimate Resolution of IntegersApr 08 2001The orbital angular momentum L as an integer can be ultimately factorized as a product of prime numbers. We show here a close relation between the resolution of L and the classification of quantum states of an N-electron 2-dimensional system. In this ... More
Classifying directional Gaussian quantum entanglement, EPR steering and discordJun 25 2014Quantum discord quantifies how much Alice's system is disrupted after a measurement is performed on Bob's. Conceptually, this behavior acts the same way as quantum steering and we find that the discord grows with better steering from Bob to Alice. Using ... More
The Correlation between Dispersion Measure and X-ray Column Density from Radio PulsarsMar 21 2013Pulsars are remarkable objects that emit across the entire electromagnetic spectrum, providing a powerful probe of the interstellar medium. In this study, we investigate the relation between dispersion measure (DM) and X-ray absorption column density ... More
Entanglement, EPR steering, and Bell-nonlocality criteria for multipartite higher-spin systemsMar 17 2011We develop criteria to detect three classes of nonlocality that have been shown by Wiseman et al. [Phys. Rev. Lett. 98, 140402 (2007)] to be nonequivalent: entanglement, EPR steering, and the failure of local hidden-variable theories. We use the approach ... More
Efficient Scheme for Perfect Collective Einstein-Podolsky-Rosen SteeringJul 27 2015A practical scheme for the demonstration of perfect one-sided device-independent quantum secret sharing is proposed. The scheme involves a three-mode optomechanical system in which a pair of independent cavity modes is driven by short laser pulses and ... More
Dynamically Controlled Resonance Fluorescence from a Doubly Dressed Solid-State Single EmitterNov 22 2014We report the first experimental demonstration of interference-induced spectral line elimination predicted by Zhu and Scully [Phys. Rev. Lett. 76, 388 (1996)] and Ficek and Rudolph [Phys. Rev. A 60, 4245 (1999)]. We drive an exciton transition of a self-assembled ... More
Quantum teleportation from light beams to vibrational states of a macroscopic diamondJul 19 2016With the recent development of optomechanics, the vibration in solids, involving collective motion of trillions of atoms, gradually enters into the realm of quantum control. Built on the recent remarkable progress in optical control of motional states ... More
Cache-enabled Wireless Networks with Opportunistic Interference AlignmentJun 27 2017Both caching and interference alignment (IA) are promising techniques for future wireless networks. Nevertheless, most of existing works on cache-enabled IA wireless networks assume that the channel is invariant, which is unrealistic considering the time-varying ... More
Mode Coupling in a Tapered Slow Light WaveguideMar 14 2010Metamaterials with simultaneous negative permittivity and negative permeability (also called left-handed materials) open new avenues to achieving unprecedented physical properties and functionality unattainable with naturally occurring materials. It has ... More
Roles of oxygen vacancies on ferromagnetism in Ni doped In2O3: A hybrid functional studyMay 15 2013Oct 30 2013The roles of oxygen vacancies on the electronic and magnetic properties of Ni doped In$_2$O$_3$ have been studied by first-principles calculations based on hybrid functional theory. Our results predict that the Ni-doped In$_2$O$_3$ system displays a ferromagnetic ... More
Determining the interspecies interaction strength of a two-species Bose-Einstein condensate from the density profile of one speciesApr 30 2018We study harmonically trapped two-species Bose-Einstein condensates within the Gross-Pitaevskii formalism. By invoking the Thomas-Fermi approximation, we derive an analytical solution for the miscible ground state in a particular region of the system's ... More
Nonlinear evolution of the ablative Rayleigh-Taylor instability with preheatingMay 23 2010Apr 26 2011Evolution of the single-mode ablative Rayleigh-Taylor instability in the presence of preheating is investigated numerically. It is found that the instability evolution depends strongly on the preheating length $L$ in front of the ablation-front interface. ... More
Graphene nano-ribbon waveguidesMay 28 2013Graphene as a one-atom-thick platform for infrared metamaterial plays an important role in optical science and engineering. Here we study the unique properties of some plasmonic waveguides based on graphene nano-ribbon. It is found that a graphene ribbon ... More
Heat transport study of the spin liquid candidate 1T-TaS2Jun 26 2017We present the ultra-low-temperature thermal conductivity measurements on single crystals of the prototypical charge-density-wave material 1$T$-TaS$_2$, which was recently argued to be a candidate for quantum spin liquid. Our experiments show that the ... More
Unified criteria for multipartite quantum nonlocalityAug 30 2010Mar 09 2011Wiseman and co-workers (Phys. Rev. Lett. 98, 140402, 2007) proposed a distinction between the nonlocality classes of Bell's nonlocality, steering and entanglement based on whether or not an overseer trusts each party in a bipartite scenario where they ... More
A Study of the Water Cherenkov CalorimeterFeb 24 2006Mar 05 2006The novel idea of water Cherenkov calorimeter made of water tanks as the next generation neutrino detector for nu factories and nu beams is investigated. A water tank prototype with a dimension of 1*1*13m^3 is constructed, its performance is studied and ... More
EPR entanglement strategies in two-well BECOct 20 2010Criteria suitable for measuring entanglement between two different potential wells in a Bose- Einstein condensation (BEC) are evaluated. We show how to generate the required entanglement, utilizing either an adiabatic two-mode or dynamic four-mode interaction ... More
Einstein-Podolsky-Rosen entanglement and steering in two-well BEC ground statesFeb 26 2012Feb 19 2014We consider how to generate and detect Einstein-Podolsky-Rosen (EPR) entanglement and the steering paradox between groups of atoms in two separated potential wells in a Bose-Einstein condensate (BEC). We present experimental criteria for this form of ... More
Lattice Boltzmann modeling of boiling heat transfer: The boiling curve and the effects of wettabilityJan 16 2015A hybrid thermal lattice Boltzmann (LB) model is presented to simulate thermal multiphase flows with phase change based on an improved pseudopotential LB approach [Q. Li, K. H. Luo, and X. J. Li, Phys. Rev. E 87, 053301 (2013)]. The present model does ... More
Benchmarking high fidelity single-shot readout of semiconductor qubitsNov 08 2018Determination of qubit initialisation and measurement fidelity is important for the overall performance of a quantum computer. However, the method by which it is calculated in semiconductor qubits varies between experiments. In this paper we present a ... More
Benchmarking high fidelity single-shot readout of semiconductor qubitsNov 08 2018Feb 26 2019Determination of qubit initialisation and measurement fidelity is important for the overall performance of a quantum computer. However, the method by which it is calculated in semiconductor qubits varies between experiments. In this paper we present a ... More
Observation of a Three-Dimensional Quasi-Long-Range Electronic Supermodulation in YBa2Cu3O7-x/La0.7Ca0.3MnO3 HeterostructuresJan 28 2016Recent developments in high-temperature superconductivity highlight a generic tendency of the cuprates to develop competing electronic (charge) supermodulations. While coupled to the lattice and showing different characteristics in different materials, ... More
On the stability and collisions in triple stellar systemsOct 12 2017A significant fraction of main sequence stars are part of a triple system. We study the long-term stability and dynamical outcomes of triple stellar systems using a large number of long-term direct N-body integrations with relativistic precession. We ... More
Three-dimensional multiple-relaxation-time lattice Boltzmann model for convection heat transfer in porous media at the REV scaleNov 10 2016Dec 02 2016In this paper, a three-dimensional (3D) multiple-relaxation-time (MRT) lattice Boltzmann (LB) model is presented for convection heat transfer in porous media at the representative elementary volume (REV) scale. The model is developed in the framework ... More
Multiple-relaxation-time lattice Boltzmann model for convection heat transfer in porous media under local thermal non-equilibrium conditionAug 14 2016Oct 15 2016In this paper, a multiple-relaxation-time (MRT) lattice Boltzmann (LB) model is proposed for convection heat transfer in porous media under local thermal non-equilibrium (LTNE) condition. The model is constructed within the framework of the three-distribution-function ... More
Bell inequalities for Continuous-Variable MeasurementsMay 12 2010Tests of local hidden variable theories using measurements with continuous variable (CV) outcomes are developed, and a comparison of different methods is presented. As examples, we focus on multipartite entangled GHZ and cluster states. We suggest a physical ... More
Testing for Multipartite Quantum Nonlocality Using Functional Bell InequalitiesNov 13 2009We show that arbitrary functions of continuous variables, e.g. position and momentum, can be used to generate tests that distinguish quantum theory from local hidden variable theories. By optimising these functions, we obtain more robust violations of ... More
Dynamical Quantum MemoriesAug 14 2008We propose a dynamical approach to quantum memories using an oscillator-cavity model. This overcomes the known difficulties of achieving high quantum input-output fidelity with storage times long compared to the input signal duration. We use a generic ... More
Spectra Analysis to Stretching of ADB Structure MetamaterialNov 20 2018Dec 03 2018Asymmetric-double-bars (ADB) structure is one of the most interesting plasmonic metamaterials that has been broadly investigated. Here we propose to manufacture ADB on top of elastic material, to get direct control to the dimension of ADB elements. To ... More
Three-dimensional multiple-relaxation-time lattice Boltzmann model for convection heat transfer in porous media at the REV scaleNov 10 2016Nov 12 2016In this paper, a three-dimensional (3D) multiple-relaxation-time (MRT) lattice Boltzmann (LB) model is presented for convection heat transfer in porous media at the representative elementary volume (REV) scale. The model is developed in the framework ... More
Entanglement, number fluctuations and optimized interferometric phase measurementNov 22 2011Jun 14 2012We derive a phase-entanglement criterion for two bosonic modes which is immune to number fluc- tuations, using the generalized Moore-Penrose inverse to normalize the phase-quadrature operator. We also obtain a phase-squeezing criterion that is immune ... More
Stabilizing transverse ablative Rayleigh Taylor like instability by using elliptically polarized laser pulses in the hole-boring radiation pressure acceleration regimeDec 11 2012Dec 28 2012It is shown that the transverse Rayleigh Taylor like instability can be well stabilized by using elliptically polarized laser in the hole boring radiation pressure acceleration regime. The $\bm{J}\times\bm{B}$ effect of the laser will thermalize the local ... More
Suppression of transverse ablative Rayleigh-Taylor-like instability in the hole-boring radiation pressure acceleration by using elliptically polarized laser pulsesMar 26 2014It is shown that the transverse Rayleigh-Taylor-like (RT) instability in the hole boring radiation pressure acceleration can be suppressed by using elliptically polarized (EP) laser. A moderate ${J}\times{B}$ heating of the EP laser will thermalize the ... More
Scalable quantum simulation of pulsed entanglement and Einstein-Podolsky-Rosen steering in optomechanicsDec 23 2013We demonstrate a complete, probabilistic quantum dynamical simulation of the standard nonlinear Hamiltonian of optomechanics, including decoherence at finite temperatures. Robust entanglement of an optical pulse with the oscillator is predicted, as well ... More
Hunting for Orphaned Central Compact Objects among Radio PulsarsJul 20 2015Central compact objects (CCOs) are a handful of young neutron stars found at the center of supernova remnants (SNRs). They show high thermal X-ray luminosities but no radio emission. Spin-down rate measurements of the three CCOs with X-ray pulsations ... More
Nonperiodic oscillation of bright solitons in the condensates with a periodically oscillating harmonic potentialFeb 03 2012Considering a periodically oscillating harmonic potential, we explore the dynamics properties of bright solitons in a Bose-Einstein condensate. It is found that under a slower oscillating potential, soliton movement exhibits a nonperiodic oscillation ... More
Dynamical preparation of EPR entanglement in two-well Bose-Einstein condensatesMay 29 2012We propose to generate Einstein-Podolsky-Rosen (EPR) entanglement between groups of atoms in a two-well Bose-Einstein condensate using a dynamical process similar to that employed in quantum optics. The local nonlinear S-wave scattering interaction has ... More
Leggett-Garg tests of macro-realism for multi-particle systems including double-well Bose-Einstein condensatesDec 17 2016We construct quantifiable generalisations of Leggett-Garg tests for macro/ mesoscopic realism and noninvasive measurability that apply when not all outcomes of measurement can be identified as arising from one of two macroscopically distinguishable states. ... More
Planar quantum squeezing and atom interferometryJan 03 2011Jul 18 2011We obtain a lower bound on the sum of two orthogonal spin component variances in a plane. This gives a novel planar uncertainty relation which holds even when the Heisenberg relation is not useful. We investigate the asymptotic, large $J$ limit, and derive ... More
Three-dimensional multiple-relaxation-time lattice Boltzmann model for convection heat transfer in porous media at the REV scaleNov 10 2016Nov 23 2016In this paper, a three-dimensional (3D) multiple-relaxation-time (MRT) lattice Boltzmann (LB) model is presented for convection heat transfer in porous media at the representative elementary volume (REV) scale. The model is developed in the framework ... More
Three-dimensional multiple-relaxation-time lattice Boltzmann model for convection heat transfer in porous media at the REV scaleNov 10 2016In this paper, a three-dimensional (3D) multiple-relaxation-time (MRT) lattice Boltzmann (LB) model is presented for convection heat transfer in porous media at the representative elementary volume (REV) scale. The model is developed in the framework ... More
Experimental evidence that electrical fatigue failure obeys a generalized Coffin-Manson lawAug 01 2016Sep 13 2016The empirical Coffin-Manson law has been used to characterize the low-cycle mechanical fatigue failure of metallic materials for decades. Our experimental studies reported in this letter have shown that the electrical fatigue failure in dielectrics can ... More
Chemical Composition Tuning of the Anomalous Hall Effect in Isoelectronic L10 FePd1-xPtx Alloy FilmsDec 05 2011Aug 19 2012The anomalous Hall effect (AHE) in L10 FePd1-xPtx alloy films is studied both experimentally and theoretically. We find that the intrinsic contribution (?sigma^int_AH) to the AHE can be significantly increased whereas the extrinsic side-jump contribution ... More
Magnetic Order and Dynamics in an Orbitally Degenerate Ferromagnetic InsulatorSep 17 2002Neutron scattering was used to determine the spin structure and the magnon spectrum of the Mott--Hubbard insulator YTiO$_3$. The magnetic structure is complex, comprising substantial G-type and A-type antiferromagnetic components in addition to the predominant ... More
Bandwidth-disorder phase diagram of half doped layered manganitesJul 05 2006Phase diagrams in the plane of $r_A$ (the average ionic radius, related to one-electron bandwidth $W$) and $\sigma^2$ (the ionic radius variance, measuring the quenched disorder), or ``bandwidth-disorder phase diagrams'', have been established for perovskite ... More
Suppressing longitudinal double-layer oscillations by using elliptically polarized laser pulses in the hole-boring radiation pressure acceleration regimeDec 03 2012Jan 30 2013It is shown that well collimated mono-energetic ion beams with a large particle number can be generated in the hole-boring radiation pressure acceleration regime by using an elliptically polarized laser pulse with appropriate theoretically determined ... More
Entangling two atoms of different isotopes via Rydberg blockadeFeb 01 2017Quantum entanglement is crucial for simulating and understanding exotic physics of strongly correlated many-body systems, such as high--temperature superconductors, or fractional quantum Hall states. The entanglement of non-identical particles exhibits ... More
Fermi surface reconstruction in electron-doped cuprates without antiferromagnetic long-range orderNov 12 2018Fermi surface (FS) topology is a fundamental property of metals and superconductors. In electron-doped cuprate Nd2-xCexCuO4 (NCCO), an unexpected FS reconstruction has been observed in optimal- and over-doped regime (x=0.15-0.17) by quantum oscillation ... More
Variation of charge/orbital ordering in layered manganites Pr1-xCa1+xMnO4 investigated by transmission electron microscopyMar 28 2007Structural features of the charge/orbital ordering (CO/OO) in single-layered manganites Pr1-xCa1+xMnO4 have been investigated systematically by transmission electron microscopy. Analyses of electron diffraction patterns as well as dark-field images have ... More
A study of event mixing for two-pion Bose-Einstein correlations in the γp -> π^0 π^0 p reactionJan 21 2017We develop an event mixing technique with a missing mass consistency (MMC) cut and a pion energy (PE) cut for the measurement of two-pion Bose-Einstein correlations (BEC) in reactions with only two identical pions produced in the final state. A multi ... More
Coexistence of long-ranged charge and orbital order and spin-glass state in single-layered manganites with weak quenched disorderJan 10 2007Sep 10 2007The relationship between orbital and spin degrees of freedom in the single-crystals of the hole-doped Pr$_{1-x}$Ca$_{1+x}$MnO$_4$, 0.3 $\leq$ $x$ $\leq$ 0.7, has been investigated by means of ac-magnetometry and charge transport. Even though there is ... More
Effect of magnetization process on levitation force between a superconducting disk and a permanent magnetDec 13 2003The levitation forces between a permanent magnet and a coaxial superconducting disk after different magnetization processes are measured. Significant effect of the magnetization process on the levitation force is observed. Theoretical calculations of ... More
ARPES and NMTO Wannier Orbital Theory of LiMo$_{6}$O$_{17}$ - Implications for Unusually Robust Quasi-One Dimensional BehaviorDec 08 2018We present the results of a combined study by band theory and angle resolved photoemission spectroscopy (ARPES) of the purple bronze, Li$_{1-x}$Mo$_{6}$O$_{17}$. Structural and electronic origins of its unusually robust quasi-one dimensional (quasi-1D) ... More
Nodal superconductivity in FeS: Evidence from quasiparticle heat transportNov 24 2015Jun 13 2016We report low-temperature heat transport measurements on superconducting iron sulfide FeS with $T_c \approx$ 5 K, which has the same crystal structure and similar electronic band structure to the superconducting iron selenide FeSe. In zero magnetic field, ... More
Quantum dynamics in ultra-cold atomic physicsDec 02 2011We review recent developments in the theory of quantum dynamics in ultra-cold atomic physics, including exact techniques, but focusing on methods based on phase-space mappings that are appli- cable when the complexity becomes exponentially large. These ... More
New high-spin structure and possible chirality in $^{109}$InFeb 15 2018High-spin structure of $^{109}$In has been investigated with the $^{100}$Mo($^{14}$N, 5$n$)$^{109}$In reaction at a beam energy of 78 MeV using the in-beam $\gamma$ spectroscopic method. The level scheme of $^{109}$In has been modified considerably and ... More
Near Transform-Limited Single Photons from an Efficient Solid-State Quantum EmitterFeb 24 2016May 13 2016By pulsed s-shell resonant excitation of a single quantum dot-micropillar system, we generate long streams of a thousand of near transform-limited single photons with high mutual indistinguishability. Hong-Ou-Mandel interference of two photons are measured ... More
Efficient injection of radiation-pressure-accelerated sub-relativistic protons into laser wakefield acceleration based on 10 PW lasersJun 28 2018We propose a hybrid laser-driven ion acceleration scheme using a combination target of a solid foil and a density-tailored background plasma. In the first stage, a sub-relativistic proton beam can be generated by the radiation pressure acceleration in ... More
Experimental Observation of Simultaneous Wave and Particle Behaviors in a Narrowband Single Photon's Wave PackeDec 04 2014Light's wave-particle duality is at the heart of quantum mechanics and can be well illustrated by Wheeler's delayed-choice experiment. The choice of inserting or removing the second classical (quantum) beam splitter in a Mach-Zehnder interferometer determines ... More
Realization of quantum Maxwell's demon with solid-state spinsNov 28 2017Resolution of the century-long paradox on Maxwell's demon reveals a deep connection between information theory and thermodynamics. Although initially introduced as a thought experiment, Maxwell's demon can now be implemented in several physical systems, ... More
Room-temperature storage of quantum entanglement using decoherence-free subspace in a solid-state spin systemJun 11 2017Nov 08 2017We experimentally demonstrate room-temperature storage of quantum entanglement using two nuclear spins weakly coupled to the electronic spin carried by a single nitrogen-vacancy center in diamond. We realize universal quantum gate control over the three-qubit ... More
Electronic structures and Raman features of a carbon nanobudNov 19 2009By employing the first-principles calculations, we investigate electronic properties of a novel carbon nanostructure called a carbon nanobud, in which a $C_{60}$ molecule covalently attaches or embeds in an armchair carbon nanotube. We find that the carbon ... More
Revisiting $^{63}$Cu NMR evidence for charge order in superconducting La$_{1.885}$Sr$_{0.115}$CuO$_4$Dec 21 2017The presence of charge and spin stripe order in the La2CuO4-based family of superconductors continues to lead to new insight on the unusual ground state properties of high Tc cuprates. Soon after the discovery of charge stripe order at T(charge)=65K in ... More
Evolution of small defect clusters in ion-irradiated 3C-SiC: combined cluster dynamics modeling and experimental studyJan 03 2017Distribution of black spot defects and small clusters in 1 MeV krypton irradiated 3C-SiC has been investigated using advanced scanning transmission electron microscopy (STEM) and TEM. We find that two thirds of clusters smaller than 1 nm identified in ... More
Experimental Realization of Universal Geometric Quantum Gates with Solid-State SpinsNov 12 2014Experimental realization of a universal set of quantum logic gates is the central requirement for implementation of a quantum computer. An all-geometric approach to quantum computation offered a paradigm for implementation where all the quantum gates ... More
Hopf dense Galois extensions with applicationsDec 23 2015Feb 01 2016Let $H$ be a finite dimensional Hopf algebra, and let $A$ be a left $H$-module algebra. Motivated by the study of the isolated singularities of $A^H$ and the endomorphism ring $\mathrm{End}_{A^H}(A)$, we introduce the concept of Hopf dense Galois extensions ... More
Transport theory with self-consistent confinement related to the lattice dataFeb 06 1998The space-time development of a quark-gluon plasma is calculated from a Vlasov equation for the distribution function of quasiparticles with medium dependent masses. At each space-time point the masses are calculated selfconsistently from a gap equation, ... More
Single 100-terawatt attosecond X-ray light pulse generationOct 11 2016The birth of attosecond light sources is expected to inspire a breakthrough in ultrafast optics, which may extend human real-time measurement and control techniques into atomic-scale electronic dynamics. For applications, it is essential to obtain a single ... More
Observation of indirect ionization of W7+ in an electron-beam ion-trap plasmaMay 15 2019In this work, visible and extreme ultraviolet spectra of W7+ are measured using the high-temperature superconducting electron-beam ion trap (EBIT) at the Shanghai EBIT Laboratory under extremely low-energy conditions (lower than the nominal electron-beam ... More
Large gap, a pseudogap and proximity effect in the Bi2Te3/Fe1+yTe interfacial superconductorJul 22 2014Oct 29 2014We report directional point-contact spectroscopy data on the novel Bi2Te3/Fe1+yTe interfacial superconductor for a Bi2Te3 thickness of 9 quintuple layers, bonded by van der Waals epitaxy to a Fe1+yTe film at an atomically sharp interface. Our data show ... More
Strong Pseudospin-Lattice Coupling in Sr3Ir2O7: Coherent Phonon Anomaly and Negative Thermal ExpansionFeb 26 2019The similarities to cuprates make iridates an interesting potential platform for investigating superconductivity. Equally attractive are their puzzling complex intrinsic interactions. Here, we report an ultrafast optical spectroscopy investigation of ... More
Reconstruction of 3-D Atomic Distortions from Electron Microscopy with Deep LearningFeb 19 2019Deep learning has demonstrated superb efficacy in processing imaging data, yet its suitability in solving challenging inverse problems in scientific imaging has not been fully explored. Of immense interest is the determination of local material properties ... More
Spinodal and dynamical instabilities at the phase transition from the quark-gluon plasma to hadronsJun 22 1998Jun 25 1998The stability of an expanding parton plasma is analyzed within quasi-particle models. The effective mass of the parton is calculated self-consistently from a gap equation which is either obtained from the Nambu Jona-Lasinio Lagrangian or from a fit to ... More
Gradient scaling phenomenon of piezoelectricity in non-piezoelectric polyvinylidene fluoride filmsOct 23 2011Nov 19 2013It has been well known that flexoelectricity can be exploited to generate an analogous piezoelectric response in non-piezoelectric materials. For the direct flexoelectric effect, the induced electric polarization is linearly proportional to the applied ... More
Lattice supersolid phase of strongly correlated bosons in an optical cavityMay 03 2012May 22 2013We numerically simulate strongly correlated ultracold bosons coupled to a high-finesse cavity field, pumped by a laser beam in the transverse direction. Assuming a weak classical optical lattice added in the cavity direction, we model this system by a ... More
Optimal mixture weights in multiple importance samplingNov 14 2014In multiple importance sampling we combine samples from a finite list of proposal distributions. When those proposal distributions are used to create control variates, it is possible (Owen and Zhou, 2000) to bound the ratio of the resulting variance to ... More
An enthalpy-based multiple-relaxation-time lattice Boltzmann method for solid-liquid phase change heat transfer in metal foamsDec 28 2016Jul 22 2017In this paper, an enthalpy-based multiple-relaxation-time (MRT) lattice Boltzmann (LB) method is developed for solid-liquid phase change heat transfer in metal foams under local thermal non-equilibrium (LTNE) condition. The enthalpy-based MRT-LB method ... More
Multiple nodeless superconducting gaps in noncentrosymmetric superconductor PbTaSe2 with topological bulk nodal linesNov 09 2015Low-temperature thermal conductivity measurements were performed on single crystal of PbTaSe$_2$, a noncentrosymmetric superconductor with topological bulk nodal lines in the electronic band structure. It is found that the residual linear term $\kappa_0/T$ ... More
Kinetic Turbulence in the Terrestrial Magnetosheath: Cluster ObservationsDec 18 2013We present a first statistical study of subproton and electron scales turbulence in the terrestrial magnetosheath using the Cluster Search Coil Magnetometer (SCM) waveforms of the STAFF instrument measured in the frequency range [1,180] Hz. It is found ... More
Galaxy disc central surface brightness distribution in the optical and near-infrared bandsJan 29 2019To study the disc central surface brightness ($\mu_0$) distribution in optical and near-infrared bands, we select 708 disc-dominated galaxies within a fixed distance of 57 Mpc from SDSS DR7 and UKIDSS DR10. Then we fit $\mu_0$ distribution by using single ... More
Superconducting MgB2 Thin Films with Tc of about 39K Grown by Pulsed Laser DepositionApr 28 2001Superconducting MgB2 thin films were fabricated on Al2O3(0001) substrates under an ex-situ processing conditions. Boron thin films were deposited by pulsed laser deposition followed by a post-annealing process. Resistance measurements of the deposited ... More
Reaction rates of $^{64}$Ge($p,γ$)$^{65}$As and $^{65}$As($p,γ$)$^{66}$Se and the extent of nucleosynthesis in type I X-ray burstsMay 09 2015Jan 29 2016The extent of nucleosynthesis in models of type I X-ray bursts and the associated impact on the energy released in these explosive events are sensitive to nuclear masses and reaction rates around the $^{64}$Ge waiting point. Using the well known mass ... More
Charge order driven by Fermi-arc instability in Bi2201Dec 04 2013Jan 24 2014The understanding of the origin of superconductivity in cuprates has been hindered by the apparent diversity of intertwining electronic orders in these materials. We combined resonant x-ray scattering (REXS), scanning-tunneling microscopy (STM), and angle-resolved ... More