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Fragmentation-fraction ratio $f_{Ξ_b}/f_{Λ_b}$ in $b$- and $c$-baryon decaysFeb 08 2018We obtain the ratio of fragmentation fractions, $f_{\Xi_b}/f_{\Lambda_b}=0.054\pm0.020$, from the measurement of $\Xi_b^0\to \Xi_c^+\pi^-$ and $\Lambda_b^0\to \Lambda_c^+\pi^-$ by LHCb with both charmed baryons reconstructed by the final states of $p ... More

Part-of-Speech Relevance Weights for Learning Word EmbeddingsMar 24 2016This paper proposes a model to learn word embeddings with weighted contexts based on part-of-speech (POS) relevance weights. POS is a fundamental element in natural language. However, state-of-the-art word embedding models fail to consider it. This paper ... More

Model Study of a Quark StarJan 10 2011In this paper we apply the equation of state (EOS) of QCD at finite chemical potential and zero temperature proposed in H. S. Zong and W. M. Sun [Int. J. Mod. Phys. {\bf A23}, 3591 (2008)] to the study of properties of quark star. This EOS contains only ... More

BATC 13-band Photometry of Open Cluster NGC 7789Jan 10 2007We present 13-band CCD intermediate-band spectrophotometry of a field centered on the open cluster NGC 7789 from 400 to nearly 1000 nm, taken with Beijing-Arizona-Taiwan-Connecticut (BATC) Multi-Color Survey photometric system. By comparing observed spectral ... More

On the $T$-leaves and the ranks of a Poisson structure on twisted conjugacy classesJan 01 2016Let $G$ be a connected complex semisimple Lie group with a fixed maximal torus $T$ and a Borel subgroup $B \supset T$. For an arbitrary automorphism $\theta$ of $G$, we introduce a holomorphic Poisson structure $\pi_\theta$ on $G$ which is invariant under ... More

Magnetic influence on the frequency of the soft-phonon mode in the incipient ferroelectric EuTiO3Nov 20 2002The dielectric constant of the incipient ferroelectric EuTiO$_3$ exhibits a sharp decrease at about 5.5K, at which temperature antiferromagnetic ordering of the Eu spins simultaneously appears, indicating coupling between the magnetism and dielectric ... More

Coordinates on Schubert cells, Kostant's harmonic forms, and the Bruhat-Poisson structure on $G/B$Oct 18 1996We relate Kostant's theorem on the cohomology of a flag manifold $G/B$ with the geometry of the Bruhat-Poisson structure. We express Kostant's harmonic forms in terms of the moment maps (for the torus action) and the Liouville volume forms for the symplectic ... More

Thermodynamic bounds and general properties of optimal efficiency and power in linear responsesJul 28 2014Mar 14 2015We study the optimal exergy efficiency and power for thermodynamic systems with Onsager-type "current-force" relationship describing the linear-response to external influences. We derive, in simple analytic forms, the maximum efficiency and optimal efficiency ... More

Tunable topological Weyl semimetal from simple cubic lattices with staggered fluxesDec 27 2011Mar 20 2012Three-dimensional Weyl fermions are found to emerge from simple cubic lattices with staggered fluxes. The mechanism is to gap the quadratic band touching by time-reversal-symmetry-breaking hoppings. The system exhibits rich phase diagrams where the number ... More

Enhancing efficiency and power of quantum-dots resonant tunneling thermoelectrics in three-terminal geometry by cooperative effectsJul 03 2015We propose a scheme of multilayer thermoelectric engine where {\em one} electric current is coupled to {\em two} temperature gradients in three-terminal geometry. This is realized by resonant tunneling through quantum dots embedded in two thermal and ... More

Emergence of triplet orbital pairing and non-Abelian states in ultracold multi-orbital optical lattices with quadratic band touchingOct 10 2011Dec 04 2011It is found that all the {\em singlet orbital pairing} instabilities are {\em absent} in a class of spin-polarized multi-orbital systems with quadratic band touching, which opens the way for {\em triplet orbital pairing} order. The ground states are found ... More

Lie Algebroids Associated to Poisson ActionsMar 08 1995This work is motivated by a result of Drinfeld on Poisson homogeneous spaces. For each Poisson manifold $P$ with a Poisson action by a Poisson Lie group $G$, we describe a Lie algebroid structure on the direct sum vector bundle $P \times {\frak g} \oplus ... More

Un 3-polyGEM de cohomologie modulo 2 nilpotenteJun 17 2003Apr 29 2004In 1983, C. McGibbon and J. Neisendorfer have given a proof for one conjecture in J.-P. Serre's famous paper (1953). In 1985, another proof was given by J. Lannes and L. Schwartz. Since then, one considers a more general conjecture: if the reduced mod ... More

Probabilistic Reasoning via Deep Learning: Neural Association ModelsMar 24 2016Aug 03 2016In this paper, we propose a new deep learning approach, called neural association model (NAM), for probabilistic reasoning in artificial intelligence. We propose to use neural networks to model association between any two events in a domain. Neural networks ... More

Combing Context and Commonsense Knowledge Through Neural Networks for Solving Winograd Schema ProblemsNov 13 2016This paper proposes a general framework to combine context and commonsense knowledge for solving the Winograd Schema (WS) and Pronoun Disambiguation Problems (PDP). In the proposed framework, commonsense knowledge bases (e.g. cause-effect word pairs) ... More

Characteristic length of a Holographic Superconductor with $d$-wave gapJun 29 2010Dec 10 2010After the discovery of the $s$-wave and $p$-wave holographic superconductors, holographic models of $d$-wave superconductor have also been constructed recently. We study analytically the perturbation of the dual gravity theory to calculate the superconducting ... More

Corrugation induced stacking solitons with topologically confined states in gapped bilayer grapheneSep 12 2016Graphene, as an atomic-thick ultrasoft membrane, almost has no resistance against out-of-plane deformations and, therefore, it is always wrinkled to a certain degree. Recently, corrugated structures and their effects on the electronic properties of monolayer ... More

Transfer Matrix of Scatterers Connected in ParallelDec 07 2016Transport phenomena in parallel coupled scatterers are studied by transfer matrix formulism. We derive a simple recurrence relation for transfer matrix of one-dimensional two-terminal systems consisting of $N$ arbitrary scattering unit cells connected ... More

Symmetry-Breaking Transition and Spectral Singularity in Coupled $\mathcal{PT}$-Symmetric Quantum PotentialsDec 07 2016We study the scattering properties of $N$ identical one-dimensional localized $\mathcal{PT}$-symmetric potentials, connected in series as well as in parallel. We derive a general transfer matrix formalism for parallel coupled quantum scatterers, and apply ... More

On the variety of Lagrangian subalgebras, IISep 14 2004Feb 28 2006When ${\frak g}$ is a complex semisimple Lie algebra, we study the variety ${\mathcal L}$ of subalgebras of ${\frak g}\oplus{\frak g}$ that are maximally isotropic with respect to $K_1 - K_2$, where $K_i$ is the Killing form on the ith factor. We show ... More

On some invariants of orbits in the flag variety under a symmetric subgroupApr 13 2011Let $G$ be a connected reductive algebraic group over an algebraically closed field ${\bf k}$ of characteristic not equal to 2, let $\B$ be the variety of all Borel subgroups of $G$, and let $K$ be a symmetric subgroup of $G$. Fixing a closed $K$-orbit ... More

Photonic Architectures for Equilibrium High-Temperature Bose-Einstein Condensation in Dichalcogenide MonolayersDec 15 2014Semiconductor-microcavity polaritons are composite quasiparticles of excitons and photons, emerging in the strong coupling regime. As quantum superpositions of matter and light, polaritons have much stronger interparticle interactions compared with photons, ... More

Non-Abelian toplogical superconductors from topological semimetals and related systems under superconducting proximity effectJul 21 2011Jan 11 2013Non-Abelian toplogical superconductors are characterized by the existence of {zero-energy} Majorana fermions bound in the quantized vortices. This is a consequence of the nontrivial bulk topology characterized by an {\em odd} Chern number. It is found ... More

On the K-theory of Toric Stack BundlesAug 12 2008Simplicial toric stack bundles are smooth Deligne-Mumford stacks over smooth varieties with fibre a toric Deligne-Mumford stack. We compute the Grothendieck $K$-theory of simplicial toric stack bundles and study the Chern character homomorphism.

The Integral (orbifold) Chow Ring of Toric Deligne-Mumford StacksJul 19 2007In this paper we study the integral Chow ring of toric Deligne-Mumford stacks. We prove that the integral Chow ring of a semi-projective toric Deligne-Mumford stack is isomorphic to the Stanley-Reisner ring of the associated stacky fan. The integral orbifold ... More

On Virasoro Constraints for Orbifold Gromov-Witten TheoryApr 16 2007May 21 2007Virasoro constraints for orbifold Gromov-Witten theory are described. These constraints are applied to the degree zreo, genus zero orbifold Gromov-Witten potentials of the weighted projective stacks $\mathbb{P}(1,N)$, $\mathbb{P}(1,1,N)$ and $\mathbb{P}(1,1,1,N)$ ... More

On the T-leaves of some Poisson structures related to products of flag varietiesNov 09 2015Jan 11 2016For a connected abelian Lie group T acting on a Poisson manifold (Y,{\pi}) by Poisson isomorphisms, the T-leaves of {\pi} in Y are, by definition, the orbits of the symplectic leaves of {\pi} under T, and the leaf stabilizer of a T-leaf is the subspace ... More

Enhancing thermoelectric efficiency and power using nonlinear inelastic transportOct 10 2016We study nonlinear transport effects on the maximum efficiency and power of thermoelectric devices. Using a QD inelastic thermoelectric device, we show that the maximum power at given temperature difference can be significantly increased to more than ... More

The Orbifold Chow Ring of Hypertoric Deligne-Mumford StacksDec 09 2005Mar 18 2007Hypertoric varieties are determined by hyperplane arrangements. In this paper, we use stacky hyperplane arrangements to define the notion of hypertoric Deligne-Mumford stacks. Their orbifold Chow rings are computed. As an application, some examples related ... More

Hypertoric geometry and Gromov-Witten theoryJun 05 2015Nov 05 2015We study Gromov-Witten theory of hypertoric Deligne-Mumford stacks from two points of view. From the viewpoint of representation theory, we calculate the operator of small quantum product by a divisor, following \cite{BMO}, \cite{MO}, \cite{MS}. From ... More

Photonic Crystal Architecture for Room Temperature Equilibrium Bose-Einstein Condensation of Exciton-PolaritonsAug 20 2014Mar 14 2015We describe photonic crystal microcavities with very strong light-matter interaction to realize room-temperature, equilibrium, exciton-polariton Bose-Einstein condensation (BEC). This is achieved through a careful balance between strong light-trapping ... More

Staircase Quantum Dots Configuration in Nanowires for Optimized Thermoelectric PowerMar 03 2016Aug 24 2016The performance of thermoelectric energy harvesters can be improved by nanostructures that exploit inelastic transport processes. One prototype is the three-terminal hopping thermoelectric device where electron hopping between quantum-dots are driven ... More

Mixed product Poisson structures associated to Poisson Lie groups and Lie bialgebrasApr 26 2015Jan 11 2016We introduce and study some mixed product Poisson structures on product manifolds associated to Poisson Lie groups and Lie bialgebras. For quasitriangular Lie bialgebras, our construction is equivalent to that of fusion products of quasi-Poisson G-manifolds ... More

An Exact Solution for Quantum Tunneling in a Dissipative SystemMay 10 1996May 16 1996Applying a technique developed recently [1,2] for an harmonic oscillator coupled to a bath of harmonic oscillators, we present an exact solution for the tunneling problem in an Ohmic dissipative system with inverted harmonic potential. The result shows ... More

Exponential Decay of Wavelength in a Dissipative SystemMay 20 1996Applying a technique developed in a recent work[1] to calculate wavefunction evolution in a dissipative system with Ohmic friction, we show that the wavelength of the wavefunction decays exponentially, while the Brownian motion width gradually increases. ... More

Variable Stars in the Field of the Open Cluster NGC 2126May 27 2009May 31 2009We report the results of a time-series CCD photometric survey of variable stars in the field of the open cluster NGC 2126. In about one square degree field covering the cluster, a total number of 21 variable candidates are detected during this survey, ... More

Multicolor Photometry of the Nearby Galaxy Cluster A119Apr 09 2012This paper presents multicolor optical photometry of the nearby galaxy cluster Abell 119 (z = 0:0442) with the Beijing-Arizona-Taiwan-Connecticut (BATC) system of 15 intermediate bands. Within the BATC viewing field of 58'* 58', there are 368 galaxies ... More

Radio Polarization of BL Lacertae objectsNov 13 2006In this paper, using the database of the university of Michigan Radio Astronomy Observatory (UMRAO) at three (4.8 GHz, 8 GHZ, and 14.5 GHz) radio frequencies, we studied the polarization properties for 47 BL Lacertae objects(38 radio selected BL Lacertae ... More

Multicolor Photometry Study of the Galaxy Cluster A2589: Dynamics, Luminosity Function and Star Formation HistoryJan 18 2011In this paper we present a multicolor photometry for A2589 ($z=0.0414$) with 15 intermediate bands in the Beijing-Arizona-Taiwan-Connecticut (BATC) system which covers an optical wavelength range from 3000 \AA\ to 10000 \AA. The spectral energy distributions ... More

Gromov-Witten theory of banded gerbes over schemesJan 31 2011Feb 01 2011Let $X$ be a smooth complex projective algebraic variety. Let $\mathcal{G}$ be a $G$-banded gerbe with $G$ a finite abelian group. We prove an exact formula expressing genus $g$ orbifold Gromov-Witten invariants of $\mathcal{G}$ in terms of those of $X$. ... More

Sensor placement by maximal projection on minimum eigenspace for linear inverse problemsJun 02 2015Nov 05 2016This paper presents two new greedy sensor placement algorithms, named minimum nonzero eigenvalue pursuit (MNEP) and maximal projection on minimum eigenspace (MPME), for linear inverse problems, with greater emphasis on the MPME algorithm for performance ... More

Gevrey Regularity for Solution of the Spatially Homogeneous Landau EquationNov 22 2009In this paper, we study the Gevrey class regularity for solutions of the spatially homogeneous Landau equations in the hard potential case and the Maxwellian molecules case.

The Quantum Orbifold Cohomology of Toric Stack BundlesFeb 28 2015Sep 09 2016We study Givental's Lagrangian cone for the quantum orbifold cohomology of toric stack bundles and prove that the I-function gives points in the Lagrangian cone, namely we construct an explicit slice of the Lagrangian cone defined by the genus $0$ Gromov-Witten ... More

Novel Two-dimensional Carbon Allotrope with Strong Electronic AnisotropyNov 20 2012Feb 08 2013Two novel two-dimensional carbon allotropes comprised of octagons and pentagons are proposed based on the first-principles calculations. The two carbon allotropes, named OPG-L and OPG-Z, are found to have distinct properties. OPG-L is metallic, while ... More

Hydrodynamics of Normal Atomic Gases with Spin-orbit CouplingApr 19 2015Jan 19 2016Successful realization of spin-orbit coupling in atomic gases by the NIST scheme opens the prospect of studying the effects of spin-orbit coupling on many-body physics in an unprecedentedly controllable way. Here we derive the linearized hydrodynamic ... More

Weak Evolvability Equals Strong EvolvabilityMay 28 2009Feb 17 2010An updated version will be uploaded later.

N-Partner Secure Direct Communication Based on Quantum NonlocalityJan 14 2004A multipartner secure direct communication protocol is presented, using quantum nonlocality. Security of this protocol is based on `High fidelity implies low entropy'. When the entanglement was successfully distributed, anyone of the multipartner can ... More

Sensor placement by maximal projection on minimum eigenspace for linear inverse problemsJun 02 2015May 14 2016This paper presents two new greedy sensor placement algorithms, named minimum nonzero eigenvalue pursuit (MNEP) and maximal projection on minimum eigenspace (MPME), for linear inverse problems, with greater emphasis on the MPME algorithm for performance ... More

Paring instability in the mixed state of d-wave superconductorJan 18 2009Apr 15 2009We propose that an excitonic gap can be generated along nodal directions by Coulomb interaction in the mixed state of d-wave cuprate superconductors. In a superconductor, the Coulomb interaction usually can not generate any fermion gap since its strength ... More

Generalized Surface Polaritons and their quantum spin Hall effectFeb 05 2016Surface polaritons, e.g., surface plasmon polaritons, are invaluable tools in nanophotonics. However, considerable plasmon loss narrows the application regime of plasmonic devices. Here we reveal some general conditions for lossless surface polaritons ... More

Liquid-gas phase transition in hot asymmetric nuclear matter with density-dependent relativistic mean-field modelsMar 17 2012Feb 14 2013The liquid-gas phase transition in hot asymmetric nuclear matter is studied within density-dependent relativistic mean-field models where the density dependence is introduced according to the Brown-Rho scaling and constrained by available data at low ... More

Hitting Time Distributions for Denumerable Birth and Death ProcessesJul 07 2010We proved the explicit formulas in Laplace transform of the hitting times for the birth and death processes on a denumerable state space with $\ift$ the exit or entrance boundary. This extends the well known Keilson's theorem from finite state space to ... More

Controlling the joint local false discovery rate is more powerful than meta-analysis methods in joint analysis of summary statistics from multiple genome-wide association studiesMay 28 2016In genome-wide association studies (GWASs) of common diseases/traits, we often analyze multiple GWASs with the same phenotype together to discover associated genetic variants with higher power. Since it is difficult to access data with detailed individual ... More

Periodic Orbit Families in the Gravitational Field of Irregular-shaped BodiesOct 29 2016The discovery of binary and triple asteroids in addition to the execution of space missions to minor celestial bodies in the past several years have focused increasing attention on periodic orbits around irregular-shaped celestial bodies. In the present ... More

Extremal asymmetric universal cloning machinesFeb 08 2012The trade-offs among various output fidelities of asymmetric universal cloning machines are investigated. First we find out all the attainable optimal output fidelities for the 1 to 3 asymmetric universal cloning machine and it turns out that there are ... More

On quark mass correction to the string potentialJul 02 1997Jul 03 1997Following recent work by Lambiase and Nesterenko we study in detail the interquark potential for a Nambu-Goto string with point masses attached to its ends. We obtain exact solutions to the gap equations for the Lagrange multipliers and metric components ... More

Ab-initio Mapping of Projected Local Density of States in Arbitrary Nanostructures: Application to Photonic Crystal Slabs and CavitiesOct 28 2012Based upon projected local density of states (PLDOS) for photons, we develop a local coupling theory to simultaneously treat the weak and strong interaction between a quantum emitter and photons in arbitrary nanostructures. The PLDOS is mapped by an extremely ... More

Hidden Gauged U(1) Model: Unifying Scotogenic Neutrino and Flavor Dark MatterJan 11 2016Feb 05 2016In both scotogenic neutrino and flavor dark matter models, the dark sector communicates with the standard model fermions via Yukawa portal couplings. We propose an economic scenario that scotogenic neutrino and flavored mediator share the same inert Higgs ... More

Demonstration of a Chip-based Nonlinear Optical IsolatorJun 14 2016Despite fundamentally challenging in integrated (nano)photonics, achieving chip-based light nonreciprocity becomes increasingly urgent in signal processing and optical communications. Because of material incompatibilities in conventional approaches based ... More

Astrophysical S factor of {$^{12}$C($α,γ$)$^{16}$O} Calculated with the Reduced R-matrix TheorySep 02 2015Determination of the accurate astrophysical S factor of {$^{12}$C($\alpha,\gamma$)$^{16}$O} reaction has been regarded as a holy grail of nuclear astrophysics for decades. In current stellar models, a knowledge of that value to better than 10\% is desirable. ... More

Modules Over Affine Lie SuperalgebrasApr 26 1993Modules over affine Lie superalgebras ${\cal G}$ are studied, in particular, for ${\cal G}=\hat{OSP(1,2)}$. It is shown that on studying Verma modules, much of the results in Kac-Moody algebra can be generalized to the super case. Of most importance are ... More

Orbifold Grand Unification: A Solution to the Doublet-Triplet ProblemDec 17 2014To solve the doublet-triplet splitting problem in SU(5) grand unified theories, we propose a four dimensional orbifold grand unified theory by acting Z2 on the SU(5) gauge group. Without an adjoint Higgs, the orbifold procedure breaks the SU(5) gauge ... More

$G/G$ Gauged Supergroup Valued WZNW Field TheoryApr 26 1993Jul 09 1993The $G/G$ gauged supergroup valued WZNW theory is considered. It is shown that for $G=\OSP$, the $G/G$ theory tensoring a ($b$, $c$, $\beta$, $\gamma$) system is equivalent to the non-critical fermionic theory. The relation between integral or half integral ... More

Leptonic Decay of Upsilon, a Possible Signature of New PhysicsNov 09 2009Apr 13 2010We calculate the inclusive decay width of $\Upsilon \to l^+ l^-$. Then we get the ratio $R_{\tau\mu}=\Gamma[\Upsilon \to \tau^+\tau^-]/ \Gamma[\Upsilon \to \mu^+\mu^-]$ to ${\cal{O}}(\alpha)$ and ${\cal{O}}(\alpha_s^2)$ within the Standard Model(SM). ... More

Pion-nucleon Sigma Term in the Global Color Model of QCDAug 18 2005Nov 25 2005We study the pion-nucleon sigma term in vacuum and in nuclear matter in the framework of global color model of QCD. With the effective gluon propagator being taken as the $\delta$-function in momentum space of Munczek-Nomirovsky model, we estimate that ... More

The braided monoidal structures on a class of linear Gr-categoriesJun 23 2012May 16 2014A linear Gr-category is a category of finite-dimensional vector spaces graded by a finite group together with natural tensor product. We classify the braided monoidal structures of a class of linear Gr-categories via explicit computations of the 3-cocycles ... More

Analyzing Evolutionary Optimization in Noisy EnvironmentsNov 20 2013Many optimization tasks have to be handled in noisy environments, where we cannot obtain the exact evaluation of a solution but only a noisy one. For noisy optimization tasks, evolutionary algorithms (EAs), a kind of stochastic metaheuristic search algorithm, ... More

A Framework of Constraint Preserving Update Schemes for Optimization on Stiefel ManifoldJan 02 2013Sep 19 2014This paper considers optimization problems on the Stiefel manifold $X^{\mathsf{T}}X=I_p$, where $X\in \mathbb{R}^{n \times p}$ is the variable and $I_p$ is the $p$-by-$p$ identity matrix. A framework of constraint preserving update schemes is proposed ... More

Optimal Kernel Combination for Test of Independence against Local AlternativesSep 12 2014Apr 12 2015Testing the independence between two random variables $x$ and $y$ is an important problem in statistics and machine learning, where the kernel-based tests of independence is focused to address the study of dependence recently. The advantage of the kernel ... More

Improving Semi-Supervised Support Vector Machines Through Unlabeled Instances SelectionMay 10 2010May 09 2011Semi-supervised support vector machines (S3VMs) are a kind of popular approaches which try to improve learning performance by exploiting unlabeled data. Though S3VMs have been found helpful in many situations, they may degenerate performance and the resultant ... More

On Embedding problem of linear fractional maps on the unit ball of $\mathbb{C}^{N}$Aug 16 2010Aug 31 2014This paper focuses on the embedding problem of linear fractional maps which explains when a linear fractional self-map of $B_{N}$ can be a member of a semigroup of holomorphic self-maps on the unit ball $B_{N}$ of the complex $N$-dimensional Euclidean ... More

On the approximation ability of evolutionary optimization with application to minimum set coverNov 17 2010Jan 08 2012Evolutionary algorithms (EAs) are heuristic algorithms inspired by natural evolution. They are often used to obtain satisficing solutions in practice. In this paper, we investigate a largely underexplored issue: the approximation performance of EAs in ... More

Efficient Core Maintenance in Large Dynamic GraphsJul 19 2012The $k$-core decomposition in a graph is a fundamental problem for social network analysis. The problem of $k$-core decomposition is to calculate the core number for every node in a graph. Previous studies mainly focus on $k$-core decomposition in a static ... More

Wave Function Evolution of a Dissipative SystemJul 06 1993Aug 06 1993For a dissipative system with Ohmic friction, we obtain a simple and exact solution for the wave function of the system plus the bath. It is described by the direct product in two independent Hilbert space. One of them is described by an effective Hamiltonian, ... More

Towards Analyzing Crossover Operators in Evolutionary Search via General Markov Chain Switching TheoremNov 03 2011Apr 26 2012Evolutionary algorithms (EAs), simulating the evolution process of natural species, are used to solve optimization problems. Crossover (also called recombination), originated from simulating the chromosome exchange phenomena in zoogamy reproduction, is ... More

On Eavesdropper-Tolerance Capability of Two-Hop Wireless NetworksDec 13 2013Two-hop wireless network serves as the basic net-work model for the study of general wireless networks, while cooperative jamming is a promising scheme to achieve the physi-cal layer security. This paper establishes a theoretical framework for the study ... More

Perfect light trapping in nanoscale thickness semiconductor films with resonant back reflector and spectrum-splitting structuresOct 08 2014The optical absorption of nanoscale thickness semiconductor films on top of light-trapping structures based on optical interference effects combined with spectrum-splitting structures is theoretically investigated. Nearly perfect absorption over a broad ... More

Numerical study of the giant nonlocal resistance in spin-orbital coupled grapheneApr 18 2016Jun 14 2016Recent experiments find the signal of giant nonlocal resistance $R_{NL}$ in H-shaped graphene samples due to the spin/valley Hall effect. Interestingly, when the Fermi energy deviates from the Dirac point, $R_{NL}$ decreases to zero much more rapidly ... More

Thermoelectric three-terminal hopping transport through one-dimensional nanosystemsJan 19 2012Jan 22 2012A two-site nanostructure (e.g, a "molecule") bridging two conducting leads and connected to a phonon bath is considered. The two relevant levels closest to the Fermi energy are connected each to its lead. The leads have slightly different temperatures ... More

Size-Sensitive Young's modulus of Kinked Silicon NanowiresMar 22 2013We perform both classical molecular dynamics simulations and beam model calculations to investigate the Young's modulus of kinked silicon nanowires (KSiNWs). The Young's modulus is found to be highly sensitive to the arm length of the kink and is essentially ... More

Atomic Design of Three-Dimensional Photonic $Z_2$ Dirac and Weyl PointsJan 10 2016Jan 26 2016Topological nodal points such as Dirac and Weyl points in photonic spectrum, as monopoles of the synthetic gauge fields in ${\vec k}$-space, offer unique abilities of manipulating light. However, designing topological nodal points in photonic crystals ... More

Topological insulator: a new quantized spin Hall resistance robust to dephasingNov 11 2008The influence of dephasing on the quantum spin Hall effect (QSHE) is studied. In the absence of dephasing, the longitudinal resistance in a QSHE system exhibits the quantum plateaus. We find that these quantum plateaus are robust against the normal dephasing ... More

Friendship-based Cooperative Jamming for Secure Communication in Poisson NetworksSep 26 2016Wireless networks with the consideration of social relationships among network nodes are highly appealing for lots of important data communication services. Ensuring the security of such networks is of great importance to facilitate their applications ... More

Equation of state for hard sphere fluids offering accurate virial coefficientsJun 23 2016The asymptotic expansion method is extended by using currently available accurate values for the first ten virial coefficients for hard sphere fluids. It is then used to yield an equation of state for hard sphere fluids, which accurately represents the ... More

First principles study of the graphene/Ru(0001) interfaceJan 08 2009Annealing the Ru metal that typically contains residual carbon impurities offers a facile way to grow graphene on Ru(0001) at the macroscopic scale. Two superstructures of the graphene/Ru(0001) interface with periodicities of 3.0-nm and 2.7-nm, respectively, ... More

First-principles studies of the Optical anisotropy of R3(No.146) space group chalcogenides crystal AX2MQ6Sep 27 2016The birefringence values of $R3$(No.146) space group crystals \ce{AX2MQ6} have been calculated. Their Electron Localization Function(ELF) was calculated to show that the acentricity of the bonds on $sp^3$ hybridization \ce{Q^2-} ions is the main origin ... More

Graded elementary quasi-Hopf algebras of tame representation typeJan 27 2014The class of graded elementary quasi-Hopf algebras of tame type is classified. Combining with our previous work [19], this completes the trichotomy for such class of algebras according to their representation types. In addition, new examples of genuine ... More

Commutative Hopf structures over a loopFeb 02 2010Let $k$ be an algebraically closed field of characteristic $p>0$. For a loop $\circlearrowleft$, denote its path coalgebra by $k\circlearrowleft$. In this paper, all the finite-dimensional commutative Hopf algebras over the sub coalgebras of $k\circlearrowleft$ ... More

Complete Study of Hadroproduction of a $Υ$ Meson Associated with a Prompt $J/ψ$May 10 2016Aug 07 2016We present the first complete study of $\Upsilon$ and prompt $J/\psi$ production from single-parton scattering, including the complete $\mathcal{O}(\alpha_S^6)$ color-singlet contribution, the $\mathcal{O}(\alpha_S^2\alpha^2)$ electroweak contribution, ... More

Estimates of essential norms of weighted composition operator from Bloch type spaces to Zygmund type spacesDec 30 2013Let $u$ be a holomorphic function and $\varphi$ a holomorphic self-map of the open unit disk $\mathbb{D}$ in the complex plane. We give some new characterizations for the boundedness of the weighted composition operators $uC_{\varphi}$ from Bloch type ... More

A Lower Bound Analysis of Population-based Evolutionary Algorithms for Pseudo-Boolean FunctionsJun 10 2016Evolutionary algorithms (EAs) are population-based general-purpose optimization algorithms, and have been successfully applied in various real-world optimization tasks. However, previous theoretical studies often employ EAs with only a parent or offspring ... More

Topological Classifications and Bifurcations of Periodic Orbits in the Potential Field of Highly Irregular-shaped Celestial BodiesMar 03 2014Mar 04 2015This paper studies the distribution of characteristic multipliers, the structure of submanifolds, the phase diagram, bifurcations and chaotic motions in the potential field of rotating highly irregular-shaped celestial bodies (hereafter called irregular ... More

Early Stopping for Interleaver Recovering of Turbo CodesMay 17 2016Parameter recovering of channel codes is important in applications such as cognitive radio. The main task for that of a turbo code is to recover the interleaver. The existing optimal algorithm recovers interleaver parameters incrementally one by one. ... More

Cooperative Spin Caloritronic DevicesFeb 03 2016We report a concept of thermoelectric devices, cooperative spin caloritronics device (CSCD), where cooperation between two or more energy channels such as spin, charge and heat currents can significantly enhance energy efficiency of spin caloritronic ... More

Gevrey hypoellipticity for a class of kinetic equationsOct 16 2009In this paper, we study the Gevrey regularity of weak solutions for a class of linear and semi-linear kinetic equations, which are the linear model of spatially inhomogeneous Boltzmann equations without an angular cutoff.

Transmission phase shift of phonon-assisted tunneling through a quantum dotNov 30 2007The influence of electron-phonon interaction on the transmission phase shift of an electron passing through a quantum dot is investigated by using the scattering theory. The transmission phase versus the intra-dot level shows a serial of phonon-induced ... More

Microscopic theory of quantum anomalous Hall effect in grapheneJan 02 2012We present a microscopic theory to give a physical picture of the formation of quantum anomalous Hall (QAH) effect in graphene due to a joint effect of Rashba spin-orbit coupling $\lambda_R$ and exchange field $M$. Based on a continuum model at valley ... More

Numerical study of the topological Anderson insulator in HgTe/CdTe quantum wellsMay 28 2009We study the disorder effect on the transport properties in the HgTe/CdTe semiconductor quantum wells. We confirm that at a moderate disorder strength, the initially un-quantized two terminal conductance becomes quantized, and the system makes a transition ... More

Positive Magneto-conductivity of Weyl Semimetals in the Ultra-quantum LimitDec 22 2015In this paper, we numerically study the magnetic transport properties of disordered Weyl semimetals (WSM) in the ultra-quantum limit. We find a positive magnetic conductivity for the long-range disorder, although the system tends to have negative magnetic ... More

Multiple Side-Band Generation for Two-Frequency Components Injected into a Tapered AmplifierMar 29 2013We have experimentally studied the multiple side-band generation for two-frequency components injected into a tapered amplifier and demonstrated its effects on atomic laser cooling. A heterodyne frequency-beat measurement and a Fabry Perot interferometer ... More