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Searching for strange quark matter objects in exoplanetsFeb 26 2017Sep 13 2017The true ground state of hadronic matter may be strange quark matter (SQM). Consequently, the observed pulsars may actually be strange quark stars, but not neutron stars. However, proving or disproving the SQM hypothesis still remains to be a difficult ... More

Reduced spin-down rate of PSR J0738-4042 explained as due to an asteroid disruption eventMar 05 2015Long term observations by Brook et al. reveal that the derivative of rotational frequency of PSR J0738-4042 changed abruptly in 2005. Originally, the spin-down rate was relatively stable, with the rotational frequency derivative of $-1.14 \times 10^{-14}~\rm ... More

Coulomb collisional effects on high energy particles in the presence of driftwave turbulenceDec 29 2013High energy particles' behavior including fusion born alpha particles in an ITER like tokamak in the presence of background driftwave turbulence is investigated by an orbit following calculation. The background turbulence is given by the toroidal driftwave ... More

Correlation between Peak Energy and Peak Luminosity in Short Gamma-Ray BurstsMay 11 2012Jun 07 2012A correlation between the peak luminosity and the peak energy has been found by Yonetoku et al. as $L_{p}\propto E_{p,i}^{2.0}$ for 11 pre-Swift long gamma-ray bursts. In this study, for a greatly expanded sample of 148 long gamma-ray bursts in the Swift ... More

A class of linear solvers built on the Biconjugate A-Orthonormalization Procedure for solving unsymmetric linear systemsApr 09 2010We present economical iterative algorithms built on the Biconjugate $A$-Orthonormalization Procedure for real unsymmetric and complex non-Hermitian systems. The principal characteristics of the developed solvers is that they are fast convergent and cheap ... More

Photonuclear reaction as a probe for $α$-clustering nuclei in the quasi-deuteron regionMar 21 2018Photon-nuclear reaction in a transport model frame, namely an Extended Quantum Molecular Dynamics (EQMD) model, has been realised at the photon energy of 70-140 MeV in the quasi-deuteron (QD) regime. For an important application, we pay a special focus ... More

Tracking Back the Solar Wind to its Photospheric Footpoints from Wind Observations -- A Statistical StudyFeb 25 2014It is of great importance to track the solar wind back to its photospheric source region and identify the related current sheets; this will provide key information for investigating the origin and predictions of the solar wind. We report a statistical ... More

Bimodal distribution of short gamma-ray bursts: evidence for two distinct types of short gamma-ray burstsMar 27 2018Recently, GRB 170817A was confirmed to be associated with GW 170817, which was produced by a neutron star - neutron star merger. It indicates that at least some short gamma-ray bursts come from binary neutron star mergers. Theoretically, it is widely ... More

Complex structure of the carbon arc discharge for synthesis of nanotubesMar 29 2017Sep 09 2017Comprehensive non-invasive spectroscopic techniques and electrical measurements of the carbon arc revealed two distinguishable plasma synthesis regions in the radial direction normal to the arc axis. These regions, which are defined as the arc core and ... More

Secondary proton flux induced by cosmic ray interactions with the atmosphereMay 20 2003The atmospheric secondary proton flux is studied for altitudes extending from sea level up to the top of atmosphere by means of a 3-dimensional Monte-Carlo simulation procedure successfully used previously to account for flux measurements of protons, ... More

Collision-Induced Glitch/Anti-GlitchesJun 16 2015We suggest that the collision of a small solid body with a pulsar can lead to an observable glitch/anti-glitch. The glitch amplitude depends on the mass of the small body and the impact parameter as well. In the collision, a considerable amount of potential ... More

The Redshift Dependence of the Radio Flux of Gamma-Ray Bursts and Their Host GalaxiesJan 01 2018Sep 07 2018Using multiwavelength observations of radio afterglows, we confirm the hypothesis that the flux density of gamma-ray bursts (GRBs) at a fixed observing frequency is invariable when the distance of the GRBs increases, which means the detection rate will ... More

Strong coupling between a plasmonic Fano resonance and anapole states in a metallic-dielectric antennaMar 03 2019In the quest to enhance light-matter interactions and miniaturize photonics devices, it is crucial to create a strong field enhancement with lower material losses. Here we combine a plasmonic Fano resonance supported by the silver cluster and anapole ... More

Odd-even effect of quantum discord and quantum phase transitions in the S=1/2 spin ladder with ring exchangeApr 27 2013The singularity of quantum correlations, such as quantum entanglement(QE) and quantum discord(QD), has been widely regarded as a valuable indicator for quantum phase transition(QPT) in low-dimensional quantum systems. In this paper, for a spin ladder ... More

The Radio Flux-Redshift Dependence of Gamma-Ray Bursts and Their Host GalaxiesJan 01 2018Using multi-wavelength observations of radio afterglows, we confirm the hypothesis that flux density of Gamma-Ray Bursts (GRBs) will become invariable as the GRBs locate far enough, that is to say the detection rate will be approximately independent of ... More

Bell inequality and nonlocality in a two-dimensional mixed spin systemsJul 25 2013In this paper, we use Bell inequality and nonlocality to study the bipartite correlation in an exactly soluble two-dimensional mixed spin system. Bell inequality turns out to be a valuable detector for phase transitions in this model. It can detect not ... More

Some Characteristic Parameters of Proton from the Bag ModelJan 06 2010Jan 09 2010We treat the mass of a proton as the total static energy which can be separated into two parts that come from the contribution of quarks and gluons respectively. We adopt the essential of the bag model of hadron to discuss the structure of a proton and ... More

Tuning toroidal dipole resonances in dielectric metamolecules by an additional electric dipolar responseNov 02 2018With the rise of artificial magnetism and metamaterials, the toroidal family recently attracts more attention for its unique properties. Here we propose an all-dielectric pentamer metamolecule consisting of nano-cylinders with two toroidal dipolar resonances, ... More

A study of pentaquark $Θ$ state in the chiral SU(3) quark modelOct 03 2003The structure of the pentaquark state uudd-sbar is studied in the chiral SU(3) quark model as well as in the extended chiral SU(3) quark model, in which the vector meson exchanges are included. Four configurations of JP=1/2- and four of JP=1/2+ are considered. ... More

Understanding the structure of $d^*(2380)$ in chiral quark modelMay 20 2015The structure and decay properties of $d^*$ have been detailedly investigated in both the chiral SU(3) quark model and the extended chiral SU(3) quark model that describe the energies of baryon ground states and the nucleon-nucleon (NN) scattering data ... More

Finite grid instability and spectral fidelity of the electrostatic Particle-In-Cell algorithmAug 13 2015Apr 07 2016The origin of the Finite Grid Instability (FGI) is studied by resolving the dynamics in the 1D electrostatic Particle-In-Cell (PIC) model in spectral domain at the single particle level and at the collective motion level. The spectral fidelity of the ... More

Delayed Energy Injection Model For Gamma-Ray Burst AfterglowsJul 17 2013Apr 15 2016The shallow decay phase and flares in the afterglows of gamma-ray bursts (GRBs) is widely believed to be associated with the later activation of central engine. Some models of energy injection involve with a continuous energy flow since the GRB trigger ... More

Signature of a spin-up magnetar from multi-band afterglow rebrightening of GRB 100814AApr 08 2015In recent years, more and more gamma-ray bursts with late rebrightenings in multi-band afterglows unveil the late-time activities of the central engines. GRB 100814A is a special one among the well-sampled events, with complex temporal and spectral evolution. ... More

Observation of Four-Photon de Broglie Wavelength by State Projection MeasurementDec 23 2005A measurement process is constructed to project an arbitrary two-mode $N$-photon state to a maximally entangled $N$-photon state (the {\it NOON}-state). The result of this projection measurement shows a typical interference fringe with an $N$-photon de ... More

Dust-to-gas ratio, $X_{\rm CO}$ factor and CO-dark gas in the Galactic anticentre: an observational studyJan 15 2015We investigate the correlation between extinction and H~{\sc i} and CO emission at intermediate and high Galactic latitudes ($|b|>10\degr$) within the footprint of the Xuyi Schmidt Telescope Photometric Survey of the Galactic anticentre (XSTPS-GAC) on ... More

Experimental demonstration of phase measurement precision beating standard quantum limit by projection measurementOct 15 2007We propose and demonstrate experimentally a projection scheme to measure the quantum phase with a precision beating the standard quantum limit. The initial input state is a twin Fock state $|N,N>$ proposed by Holland and Burnett [Phys. Rev. Lett. {\bf ... More

Demonstration of three-photon de Broglie wavelength by projection measurementOct 31 2006Two schemes of projection measurement are realized experimentally to demonstrate the de Broglie wavelength of three photons without the need for a maximally entangled three-photon state (the NOON state). The first scheme is based on the proposal by Wang ... More

Entanglement and interference between different degrees of freedom of photons statesApr 17 2007Jan 04 2008In this paper, photonic entanglement and interference are described and analyzed with the language of quantum information process. Correspondingly, a photon state involving several degrees of freedom is represented in a new expression based on the permutation ... More

Stimulated emission of two photons in parametric amplification and its interpretation as multi-photon interferenceFeb 06 2007Stimulated emission of two photons is observed experimentally in the parametric amplification process and is compared to a three-photon interference scheme. We find that the underlying physics of stimulated emission is simply the constructive interference ... More

Fall back accretion and energy injections in gamma-ray burstsDec 03 2013Jan 27 2015Intense flares that occur at late times relative to the prompt phase have been observed by the $Swift$ satellite in the X-ray afterglows of gamma-ray bursts (GRBs). Here, we present a detailed analysis on the fall back accretion process to explain the ... More

Understanding Spin Configuration in the Geometrically Frustrated Magnet TbB$_{4}$: a Resonant Soft X-ray Scattering StudyMay 10 2018The frustrated magnet has been regarded as a system that could be a promising host material for the quantum spin liquid (QSL). However, it is difficult to determine the spin configuration and the corresponding mechanism in this system, because of its ... More

Demonstration of Temporal Distinguishability of Three and Four Photons with Asymmetric Beam SplitterJul 21 2007By using an asymmetric beam splitter, we observe the generalized Hong-Ou-Mandel effects for three and four photons, respectively. Furthermore, we can use this generalized Hong-Ou-Mandel interferometer to characterize temporal distinguishability.

Demonstration of Controllable Temporal Distinguishability in a Three-Photon StateJun 14 2006Multi-photon interference is at the heart of the recently proposed linear optical quantum computing scheme and plays an essential role in many protocols in quantum information. Indistinguishability is what leads to the effect of quantum interference. ... More

Impact of Building-Level Motor Protection on Power System Transient BehaviorsJun 19 2018Protection strategies for transmission and distribution systems have been extensively investigated to facilitate better coordination of physical protection devices. A diverse range of functional motors with dedicated protection schemes are being used ... More

Four-Photon Interference with Asymmetric Beam SplittersDec 01 2006Jun 25 2007Two experiments of four-photon interference are performed with two pairs of photons from parametric down-conversion with the help of asymmetric beam splitters. The first experiment is a generalization of the Hong-Ou-Mandel interference effect to two pairs ... More

Hertz-level Measurement of the 40Ca+ 4s 2S1/2-3d 2D5/2 Clock Transition Frequency With Respect to the SI Second through GPSNov 22 2011We report a frequency measurement of the clock transition of a single ^40Ca^+ ion trapped and laser cooled in a miniature ring Paul trap with 10^-15 level uncertainty. In the measurement, we used an optical frequency comb referenced to a Hydrogen maser, ... More

Potential for Precision Measurement of Solar Neutrino Luminosity by HERONNov 26 2007Results are presented for a simulation carried out to test the precision with which a detector design (HERON) based on a superfluid helium target material should be able to measure the solar pp and Be7 fluxes. It is found that precisions of +/- 1.68% ... More

Hand in Hand Evolution of b-relaxation and Boson Peak in Metallic GlassesJul 02 2015Boson peak and beta-relaxation are two intrinsic and markedly different dynamic modes of glasses, and their structural origins are long-standing issues. Through tuning atomic packing of a model metallic glass with microalloying of different types of elements, ... More

Sigma_c Dbar and Lambda_c Dbar states in a chiral quark modelJan 03 2011May 21 2013The S-wave Sigma_c Dbar and Lambda_c Dbar states with isospin I=1/2 and spin S=1/2 are dynamically investigated within the framework of a chiral constituent quark model by solving a resonating group method (RGM) equation. The results show that the interaction ... More

Robust method to determine the resolution of a superlens by analyzing the near-field image of a two-slit objectMay 01 2011In the last decade, metamaterials-based superlenses, with a resolution below Abbe's diffraction limit, have emerged. To obtain a rough estimate of the resolution of such superlenses, imaging of two subwavelength slits, separated by a subwavelength gap ... More

Topological Gauge Theory Of General Weitzenbock Manifolds Of Dislocations In CrystalsMay 23 1999General Weitzenbock material manifolds of dislocations in crystals Are proposed, the reference, idealized and deformation states of the bodies in general case are generally described by the general manifolds, the topological gauge field theory of dislocations ... More

A model of the light curves of Gamma-Ray BurstsMar 10 2007Mar 27 2007An extreme Kerr black hole (BH) surrounded by a precessing disk is invoked to explain the light curves of gamma-ray bursts (GRBs) based on the coexistence of the Blandford-Znajek (BZ) and the magnetic coupling (MC) processes. The overall shape of the ... More

Muon Identification with Muon Telescope Detector at the STAR ExperimentJan 02 2016Jul 15 2016Muon Telescope Detector (MTD) is a newly installed detector in the STAR experiment. It provides an excellent opportunity to study heavy quarkonium physics using the dimuon channel in heavy ion collisions. In this paper, we report the muon identification ... More

On the Numerical Dispersion of Electromagnetic Particle-In-Cell Code : Finite Grid InstabilityJul 20 2014The Particle-In-Cell (PIC) method is widely used in relativistic particle beam and laser plasma modeling. However, the PIC method exhibits numerical instabilities that can render unphysical simulation results or even destroy the simulation. For electromagnetic ... More

Modelling the $γ$-ray variability of 3C 273Aug 01 2016We investigate MeV-GeV $\gamma$-ray outbursts in 3C 273 in the frame of a time-dependent one-zone synchrotron self-Compton (SSC) model. In this model, electrons are accelerated to extra-relativistic energy through the stochastic particle acceleration ... More

Nanoscale superconducting gap variations, strong coupling signatures and lack of phase separation in optimally doped BaFe1.86Co0.14As2Dec 24 2008Jan 26 2009We present tunneling data from optimally-doped, superconducting BaFe1.86Co0.14As2 and its parent compound, BaFe2As2. In the superconductor, clear coherence-like peaks are seen across the whole field of view, and their analysis reveals nanoscale variations ... More

Anomalous spin distribution in the superconducting ferromagnet UCoGe studied by polarized neutron diffractionMay 13 2010We report a polarized neutron diffraction study conducted to reveal the nature of the weak ferromagnetic moment in the superconducting ferromagnet UCoGe. We find that the ordered moment in the normal phase in low magnetic fields (B // c) is predominantly ... More

Effect of disorder in the charge-density-wave compounds LaTe$_{1.95}$ and CeTe$_{1.95-x}$Se$_x$ (x=0 and 0.16) as revealed by optical spectroscopyNov 08 2012We present optical spectroscopy measurements on rare-earth ditelluride single crystals of LaTe$_{1.95}$ and CeTe$_{1.95-x}$Se$_x$ (x=0 and 0.16). The measurements reveal formation of charge density wave energy gaps at rather high energy levels, e.g. 2$\Delta\sim$ ... More

Angle-resolved photoemission studies of the superconducting gap symmetry in Fe-based superconductorsAug 23 2012The superconducting gap is the fundamental parameter that characterizes the superconducting state, and its symmetry is a direct consequence of the mechanism responsible for Cooper pairing. Here we discuss about angle-resolved photoemission spectroscopy ... More

Quantum spin liquid states in the two dimensional kagome antiferromagnets, ZnxCu4-x(OD)6Cl2May 16 2007A three-dimensional system of interacting spins typically develops static long-range order when it is cooled. If the spins are quantum (S = 1/2), however, novel quantum paramagnetic states may appear. The most highly sought state among them is the resonating ... More

Structural transition in NaxCoO2 with x near 0.75 due to Na rearrangementMay 28 2004We report neutron powder diffraction measurements on a series of NaxCoO2 samples with x near 0.75 which were prepared under different synthesis conditions. Two different crystal structures for the samples are observed at room temperature. The two structures ... More

HST and LAMOST discover a dual active galactic nucleus in J0038+4128Feb 12 2014We report the discovery of a kiloparsec-scale dual active galactic nucleus (AGN) in J0038+4128. From the Hubble Space Telescope (HST) Wide Field Planetary Camera (WFPC2) images, we find two optical nuclei with a projection separation of 4.7 kpc (3.44 ... More

Ultralow-temperature thermal conductivity of Pr2Ir2O7: a metallic spin-liquid candidate with quantum criticalityJul 30 2018The frustrated pyrochlore iridate Pr$_2$Ir$_2$O$_7$ was proposed as a metallic quantum spin liquid located at a zero-field quantum critical point. Here we present the ultralow-temperature thermal conductivity measurements on the Pr$_2$Ir$_2$O$_7$ single ... More

The development of $^{222}$Rn detectors for JUNO prototypeOct 10 2017Dec 14 2017The radioactive noble gas $^{222}$Rn, which can be dissolved in water, is an important background source for JUNO. In this paper, based on the water system of JUNO prototype, two kinds of high sensitivity radon detectors have been proposed and developed. ... 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

The cross-correlation analysis in Z source GX 349+2Nov 02 2015Nov 12 2015Using all the observations from Rossi X-ray Timing Explorer for Z source GX 349+2, we systematically carry out cross-correlation analysis between its soft and hard X-ray light curves. During the observations from January 9 to January 29, 1998, GX 349+2 ... More

Biomolecules in the Interstellar Medium and CometsApr 25 2001We review recent studies of organic molecule formation in dense molecular clouds and in comets. We summarise the known organic inventories of molecular clouds and recent comets, particularly Hale-Bopp. The principal chemical formation pathways involving ... More

Organic Molecules in the Hot Corinos and Circumstellar Disks of IRAS 16293-2422Apr 12 2005Using the recently-commissioned Submillimeter Array (SMA), we have detected several complex organic molecules, including (CH3)2O, C2H5OH, C2H5CN, and tentatively CH2CDCN, toward the protostellar hot cores of IRAS 16293-2422 at arcsecond-resolution (~< ... More

Dynamical Evolution of Gamma-Ray Burst Remnants with Evolving Radiative EfficiencyOct 30 2002In previous works, a generic dynamical model has been suggested by Huang et al., which is shown to be correct for both adiabatic and radiative blastwaves, and in both ultra-relativistic and non-relativistic phases. In deriving their equations, Huang et ... More

Superconductivity and magnetic order in the non-centrosymmetric Half Heusler compound ErPdBiOct 17 2013We report superconductivity at $T_c = 1.22$ K and magnetic order at $T_N = 1.06$ K in the semi-metallic noncentrosymmetric Half Heusler compound ErPdBi. The upper critical field, $B_{c2}$, has an unusual quasi-linear temperature variation and reaches ... More

First-principles study of the thermoelectric properties of quaternary tetradymite BiSbSeTe2Feb 08 2018The electronic and phonon transport properties of quaternary tetradymite BiSbSeTe2 are investigated using first-principles approach and Boltzmann transport theory. Unlike the binary counterpart Bi2Te3, we obtain a pair of Rashba splitting bands induced ... More

Dual Fano and Lorentzian line profile poperties of autoionizing statesApr 22 2015Ott et al. (Science (340, 716 (2013)) successfully transferred Fano profile into Lorentzian lineshape using an intense infrared laser, after excitation of autoionizing states in helium by attosecond XUV pulse. This is a very important step forward of ... More

Pressure studies of the quantum critical alloy Ce(0.93)Yb(0.07)CoIn5Nov 10 2014Here we present our experimental and theoretical study of the effects of pressure on the transport properties of the heavy-fermion alloy Ce(1-x)Yb(x)CoIn5 with x~0.07. We specifically choose this value of ytterbium concentration because the magnetic-field-induced ... More

Coulomb correlations intertwined with spin and orbital excitations in LaCoO$_3$Aug 15 2017We carried out temperature-dependent (20 - 550 K) measurements of resonant inelastic X-ray scattering on LaCoO$_3$ to investigate the evolution of its electronic structure across the spin-state crossover. In combination with charge-transfer multiplet ... More

Tracing crystal-field splittings in the rare earth-based intermetallic CeIrIn$_5$Feb 13 2018Crystal electric field states in rare earth intermetallics show an intricate entanglement with the many-body physics that occurs in these systems and that is known to lead to a plethora of electronic phases. Here, we attempt to trace different contributions ... More

Optical Photometrical Observations and Variability for Quasar 4C 29.45Oct 08 2006Oct 13 2006We reported the result of long term optical variability of the blazar 4C 29.45 (QSO 1156+295, Ton 599), carried out optical photometric observations in Johnson V, Cousins RI passbands during April 1997 to March 2002 using the 1.56 meter telescope of the ... More

Coexistence of superconductivity and density wave in $\mathrm{Ba_2Ti_2Fe_2As_4O}$: an optical spectroscopy studySep 16 2014Oct 13 2014We performed an optical spectroscopy measurement on single crystals of $\mathrm{Ba_2Ti_2Fe_2As_4O}$, which is a newly discovered superconductor showing a coexistence of superconductivity and density wave order. The study reveals a spectral change related ... More

Nodeless superconductivity in the SnAs-based van der Waals type superconductor NaSn2As2Jun 04 2018We grew the single crystals of the SnAs-based van der Waals (vdW)-type superconductor NaSn$_2$As$_2$ and systematically measured its resistivity, specific heat, and ultralow-temperature thermal conductivity. The superconducting transition temperature ... More

Collective nature of spin excitations in superconducting cuprates probed by resonant inelastic x-ray scatteringFeb 09 2015We used resonant inelastic x-ray scattering (RIXS) with and without analysis of the scattered photon polarization, to study dispersive spin excitations in the high temperature superconductor YBa2Cu3O6+x over a wide range of doping levels (0.1 < x < 1). ... More

From local moment to mixed-valence regime in Ce(1-x)Yb(x)CoIn5 alloysJan 09 2014Feb 26 2014We investigated the onset of the many-body coherence in the f-orbital single crystalline alloys Ce(1-x)Yb(x)CoIn5 through thermodynamic and magneto-transport measurements. Our study shows the evolution of the many-body electronic state as the Kondo lattice ... More

Incommensurate magnetic structure in the orthorhombic perovskite ErMnO_3Jul 03 2007Aug 02 2007By combining dielectric, specific heat, and magnetization measurements and high-resolution neutron powder diffraction, we have investigated the thermodynamic and magnetic/structural properties of the metastable orthorhombic perovskite ErMnO_3 prepared ... More

Heteroepitaxial Growth and Multiferroic Properties of Mn-doped BiFeO3 films on SrTiO3 buffered III-V Semiconductor GaAsSep 17 2013Epitaxial Mn-doped BiFeO3 (MBFO) thin films were grown on GaAs (001) substrate with SrTiO3 (STO) buffer layer by pulsed laser deposition. X-ray diffraction results demonstrate that the films show pure (00l) orientation, and MBFO(100)//STO(100), whereas ... More

Presence of Exotic Electronic Surface States in LaBi and LaSbJul 14 2016Nov 01 2016Extremely high magnetoresistance (XMR) in the lanthanum monopnictides La$X$ ($X$ = Sb, Bi) has recently attracted interest in these compounds as candidate topological materials. However, their perfect electron-hole compensation provides an alternative ... More

On the Presence of Exotic Electronic Surface States in LaBi and LaSbJul 14 2016Extremely high magnetoresistance (XMR) in the lanthanum monopnictides La$X$ ($X$ = Sb, Bi) has recently attracted interest in these compounds as candidate topological materials. However, their perfect electron-hole compensation provides an alternative ... More

ARPES/STM study of the surface terminations and 5$f$-electron character in URu$_2$Si$_2$Sep 19 2018Hidden order in URu$_2$Si$_2$ has remained a mystery now entering its 4th decade. The importance of resolving the nature of the hidden order has stimulated extensive research. Here we present a detailed characterization of different surface terminations ... More

A Soluble Free-Fermion Model in d DimensionsDec 05 1994Dec 09 1994We consider a vertex model in d dimensions characterized by lines which run in a preferred direction. We show that this vertex model is soluble if the weights of vertices with intersecting lines are given by a free-fermion condition, and that a fugacity ... More

A model for the optical flares from the Galactic tran-sient SWIFT J195509+261406Aug 22 2009The Galactic hard X-ray transient SWIFT J195509+261406 was first observed as a gamma-ray burst GRB 070610. Within 3 days after the burst, more than forty optical flares had been observed. Here we propose that this peculiar event should be associated with ... More

Equilibria of biological aggregations with nonlocal repulsive-attractive interactionsSep 13 2011Sep 18 2011We consider the aggregation equation $\rho_{t}-\nabla\cdot(\rho\nabla K\ast\rho) =0$ in $\mathbb{R}^{n}$, where the interaction potential $K$ incorporates short-range Newtonian repulsion and long-range power-law attraction. We study the global well-posedness ... More

Functional SPDE with Multiplicative Noise and Dini DriftMay 26 2015Existence, uniqueness and non-explosion of the mild solution are proved for a class of semi-linear functional SPDEs with multiplicative noise and Dini continuous drifts. In the finite-dimensional and bounded time delay setting, the log-Harnack inequality ... More

A new three-parameter correlation for gamma-ray bursts with a plateau phase in the afterglowMar 21 2011Nov 29 2011Gamma ray bursts (GRBs) have great advantages for their huge burst energies, luminosities and high redshifts in probing the Universe. A few interesting luminosity correlations of GRBs have been used to test cosmology models. Especially, for a subsample ... More

Estimating the black hole mass of NGC1313 X-1 based on the spectral and timing propertiesJan 06 2019The discovery of 3:2 quasi-periodic oscillations (QPOs) in the ultraluminous X-ray source NGC 1313 X-1 suggests it harbors an intermediate-mass black hole (IMBH). We test this numerically by modelling the 3:2 QPOs and the associated X-ray spectrum based ... More

Alice-Bob Physics: Coherent Solutions of Nonlocal KdV SystemsJun 10 2016Feb 07 2017In natural and social science, many events happened at different space-times may be closely correlated. Two events, $A$ (Alice) and $B$ (Bob) are defined correlated if one event is determined by another, say, $B=\hat{f}A$ for suitable $\hat{f}$ operators. ... More

Exchange current contributions in null-plane quantum models of elastic electron deuteron scatteringDec 11 2008Aug 09 2009We investigate exchange current contributions to elastic electron-deuteron scattering using exactly Poincar\'e invariant quantum mechanics with a null-plane kinematic symmetry. Our model exchange current is motivated by one-pion-exchange physics. Exact ... More

Monte Carlo Study of Cosmic-Ray Propagation in the Galaxy and Diffuse Gamma-Ray ProductionJun 04 2007This work presents preliminary results for the time-dependent cosmic-ray propagation in the Galaxy by a fully 3-dimensional Monte Carlo simulation. The distribution of cosmic-rays (both protons and helium nuclei) in the Galaxy is studied on various spatial ... More

Delta K, Lambda K, and Sigma K states in the extended chiral SU(3) quark modelNov 21 2005Dec 26 2005By use of the resonating group method, the Delta K, Lambda K, and Sigma K states are further dynamically studied in the extended chiral SU(3) quark model based on our previous work. Similar to the results given by the original chiral SU(3) quark model, ... More

Nature of Orbital Ordering in La_0.5Sr_1.5MnO_4 is Studied by Soft X-ray Linear DichroismDec 30 2003We found that the conventional model of orbital ordering of 3x^2-r^2/3y^2-r^2 type in the eg states of La_0.5Sr_1.5MnO_4 is incompatible with measurements of linear dichroism in the Mn 2p-edge x-ray absorption, whereas these eg states exhibit predominantly ... More

Annealing induced colossal magnetocapacitance and colossal magnetoresistance in In-doped CdCr2S4Dec 29 2012The correlation between colossal magnetocapacitance (CMC) and colossal magnetoresistance (CMR) in CdCr2S4 system has been revealed. The CMC is induced in polycrystalline Cd0.97In0.03Cr2S4 by annealing in cadmium vapor. At the same time, an insulator-metal ... More

New sum rule identities and duality relation for the Potts $n$-point correlation functionJun 25 1997It is shown that certain sum rule identities exist which relate correlation functions for $n$ Potts spins on the boundary of a planar lattice for $n\geq 4$. Explicit expressions of the identities are obtained for $n=4,5$. It is also shown that the identities ... More

Dispersion, damping, and intensity of spin excitations in the single-layer (Bi,Pb)$_{2}$(Sr,La)$_{2}$CuO$_{6+δ}$ cuprate superconductor familyAug 05 2018Using Cu-$L_3$ edge resonant inelastic x-ray scattering (RIXS) we measured the dispersion and damping of spin excitations (magnons and paramagnons) in the high-$T_\mathrm{c}$ superconductor (Bi,Pb)$_{2}$(Sr,La)$_{2}$CuO$_{6+\delta}$ (Bi2201), for a large ... More

Nanoengineering of a Negative-Index Binary-Staircase Lens for the Optics RegimeJun 03 2008We show that a binary-staircase optical element can be engineered to exhibit an effective negative index of refraction, thereby expanding the range of optical properties theoretically available for future optoelectronic devices. The mechanism for achieving ... More

Electronic properties of a heavy-fermion U(Ru0.92Rh0.08)2Si2 single crystalOct 26 2016We report the crystal structure and highly-anisotropic magnetic, transport and thermal properties of an exceptionally good single crystal of U(Ru0.92Rh0.08)2Si2 prepared using a modified Czochralski method. Our study, that also includes neutron diffraction ... More

Experimental Discovery of the First Nonsymmorphic Topological Insulator KHgSbMay 22 2016Topological insulators (TIs) host novel states of quantum matter, distinguished from trivial insulators by the presence of nontrivial conducting boundary states connecting the valence and conduction bulk bands. Up to date, all the TIs discovered experimentally ... More

Mapping the three-dimensional dust extinction toward the supernova remnant S147 - the S147 dust cloudSep 03 2017We present a three dimensional (3D) extinction analysis in the region toward the supernova remnant (SNR) S147 (G180.0-1.7) using multi-band photometric data from the Xuyi Schmidt Telescope Photometric Survey of the Galactic Anticentre (XSTPS-GAC), 2MASS ... More

Optical properties of BaFe$_{2-x}$Co$_x$As$_2$Dec 03 2009We present detailed temperature dependent optical data on BaFe$_{2-x}$Co$_{x}$As$_{2}$ (BCFA), with x = 0.14, between 4 meV and 6.5 eV. We analyze our spectra to determine the main optical parameters and show that in this material the interband conductivity ... 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

Early Rebrightenings of X-ray Afterglows from Ring-Shaped GRB JetsAug 10 2010Early rebrightenings at a post-burst time of 10^2 - 10^4 s have been observed in the afterglows of some gamma-ray bursts (GRBs). Unlike X-ray flares, these rebrightenings usually last for a relatively long period. The continuous energy injection mechanism ... More

Production of Neutrinos and Secondary Electrons in Cosmic SourcesNov 15 2007Jan 23 2008We study the individual contribution to secondary lepton production in hadronic interactions of cosmic rays (CRs) including resonances and heavier secondaries. For this purpose we use the same ethodology discussed earlier \cite{Huang07}, namely the Monte ... More

Kaon-nucleon interaction in the extended chiral SU(3) quark modelJul 09 2005The chiral SU(3) quark model is extended to include the coupling between the quark and vector chiral fields. The one-gluon exchange (OGE) which dominantly governs the short-range quark-quark interaction in the original chiral SU(3) quark model is now ... More

N K and Delta K states in the chiral SU(3) quark modelSep 15 2004Mar 18 2005The isospin I=0 and I=1 kaon-nucleon $S$, $P$, $D$, $F$ wave phase shifts are studied in the chiral SU(3) quark model by solving the resonating group method (RGM) equation. The calculated phase shifts for different partial waves are in agreement with ... More

Entanglement dynamics of two-qubit system in different types of noisy channelsAug 27 2008In this paper, we study entanglement dynamics of a two-qubit extended Werner-like state locally interacting with independent noisy channels, i.e., amplitude damping, phase damping and depolarizing channels. We show that the purity of initial entangled ... More