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Results for "Ming Gong"

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Cognitive Beamforming for Multiple Secondary Data Streams With Individual SNR ConstraintsMay 26 2013In this paper, we consider cognitive beamforming for multiple secondary data streams subject to individual signal-to-noise ratio (SNR) requirements for each secondary data stream. In such a cognitive radio system, the secondary user is permitted to use ... More
Conquer the fine structure splitting of excitons in self-assembled InAs/GaAs quantum dots via combined stressesJun 06 2012Eliminating the fine structure splitting (FSS) of excitons in self-assembled quantum dots (QDs) is essential to the generation of high quality entangled photon pairs. It has been shown that the FSS has a lower bound under uniaxial stress. In this letter, ... More
Variability of Contact Process in Complex NetworksApr 03 2012We study numerically how the structures of distinct networks influence the epidemic dynamics in contact process. We first find that the variability difference between homogeneous and heterogeneous networks is very narrow, although the heterogeneous structures ... More
Model Compression with Multi-Task Knowledge Distillation for Web-scale Question Answering SystemApr 21 2019Deep pre-training and fine-tuning models (like BERT, OpenAI GPT) have demonstrated excellent results in question answering areas. However, due to the sheer amount of model parameters, the inference speed of these models is very slow. How to apply these ... More
Temperature Dependent Empirical Pseudopotential Theory For Self-Assembled Quantum DotsMar 13 2012We develop a temperature dependent empirical pseudopotential theory to study the electronic and optical properties of self-assembled quantum dots (QDs) at finite temperature. The theory takes the effects of both lattice expansion and lattice vibration ... More
Towards scalable entangled photon sources with self-assembled InAs/GaAs quantum dotsDec 09 2014Biexciton cascade process in self-assembled quantum dots (QDs) provides an ideal system for deterministic entangled photon pair source, which is essential in quantum information science. The entangled photon pairs have recently be realized in experiments ... More
Exotic Spin Phases in Two Dimensional Spin-orbit Coupled Models: Importance of Quantum Fluctuation EffectsJan 26 2017We investigate the phase diagrams of the effective spin models derived from Fermi-Hubbard and Bose-Hubbard models with Rashba spin-orbit coupling, using string bond states, one of the quantum tensor network states methods. We focus on the role of quantum ... More
Weiqi games as a tree: Zipf's law of openings and beyondMar 11 2015Jun 23 2015Weiqi is one of the most complex board games played by two persons. The placement strategies adopted by Weiqi players are often used to analog the philosophy of human wars. Contrary to the western chess, Weiqi games are less studied by academics partially ... More
Compressing Deep Convolutional Networks using Vector QuantizationDec 18 2014Deep convolutional neural networks (CNN) has become the most promising method for object recognition, repeatedly demonstrating record breaking results for image classification and object detection in recent years. However, a very deep CNN generally involves ... More
Dynamical topological phases in quenched spin-orbit coupled degenerate Fermi gasJun 15 2014Jan 22 2015The spin-orbit coupled degenerate Fermi gas provides a totally new platform to realize topological superfluids and related topological excitations. Previous studies have mainly focused on the properties of the ground state. Here we consider a two-dimensional ... More
Investigation on energetic optimization problems of stochastic thermodynamics with iterative dynamic programmingDec 18 2009The energetic optimization problem, e.g., searching for the optimal switch- ing protocol of certain system parameters to minimize the input work, has been extensively studied by stochastic thermodynamics. In current work, we study this problem numerically ... More
Artificial Light Harvesting by Dimerized Mobius RingJun 26 2017Jun 28 2017We theoretically study artificial light harvesting by a dimerized Mobius ring. When the donors in the ring are dimerized, the energies of the donor ring are splitted into two sub-bands. Because of the nontrivial Mobius boundary condition, both the photon ... More
Exciton polarization, fine structure splitting and quantum dot asymmetry under uniaxial stressDec 13 2010May 03 2011We derive a general relation between the fine structure splitting (FSS) and the exciton polarization angle of self-assembled quantum dots (QDs) under uniaxial stress. We show that the FSS lower bound under external stress can be predicted by the exciton ... More
Decouple Electronic and Phononic Transport in Nanotwinned Structure: A New Strategy for Enhancing the Figure-of-merit of ThermoelectricsMar 01 2017Thermoelectrics (TE) materials manifest themselves in direct conversion of temperature differences to electric power and vice versa. Despite remarkable advances have been achieved in the past decades for various TE systems, the energy conversion efficiencies ... More
Enhanced-alignment Measure for Binary Foreground Map EvaluationMay 26 2018Jul 24 2018The existing binary foreground map (FM) measures to address various types of errors in either pixel-wise or structural ways. These measures consider pixel-level match or image-level information independently, while cognitive vision studies have shown ... More
Gapless Chiral Spin Liquid Phase in Spin-$1/2$ Triangular Heisenberg ModelMay 28 2019We study the ground state of the spin-$1/2$ triangular Heisenberg model with first- ($J_1$), second- ($J_2$), and third-neighbor ($J_3$) couplings by using large-scale density matrix renormalization group calculation on cylinder system with circumference ... More
Dzyaloshinskii-Moriya Interaction and Spiral Order in Spin-orbit Coupled Optical LatticesMay 28 2012May 29 2015We show that the recent experimental realization of spin-orbit coupling in ultracold atomic gases can be used to study different types of spin spiral order and resulting multiferroic effects. Spin-orbit coupling in optical lattices can give rise to the ... More
Electronic structure of self-assembled InAs/InP quantum dots: A Comparison with self-assembled InAs/GaAs quantum dotsAug 26 2007We investigate the electronic structure of the InAs/InP quantum dots using an atomistic pseudopotential method and compare them to those of the InAs/GaAs QDs. We show that even though the InAs/InP and InAs/GaAs dots have the same dot material, their electronic ... More
Proposal for quantum many-body simulation and torsional matter-wave interferometry with a levitated nanodiamondNov 17 2016Aug 14 2017Hybrid spin-mechanical systems have great potentials in sensing, macroscopic quantum mechanics, and quantum information science. In order to induce strong coupling between an electron spin and the center-of-mass motion of a mechanical oscillator, a large ... More
CREST: Convolutional Residual Learning for Visual TrackingAug 01 2017Discriminative correlation filters (DCFs) have been shown to perform superiorly in visual tracking. They only need a small set of training samples from the initial frame to generate an appearance model. However, existing DCFs learn the filters separately ... More
A salt and pepper noise image denoising method based on the generative classificationJul 15 2018In this paper, an image denoising algorithm is proposed for salt and pepper noise. First, a generative model is built on a patch as a basic unit and then the algorithm locates the image noise within that patch in order to better describe the patch and ... More
Demonstrating nonlocality induced teleportation through Majorana bound states in a semiconductor nanowireAug 18 2012Dec 13 2013It was predicted by Tewari [Phys. Rev. Lett. {\bf 100}, 027001 (2008)] that a teleportationlike electron transfer phenomenon is one of the novel consequences of the existence of Majorana fermion, because of the inherently nonlocal nature. In this work ... More
Quantum statistical imaging of particles without restriction of the diffraction limitOct 09 2012Feb 21 2013A practical quantum measurement method based on the quantum nature of anti-bunching photon emission has been developed to detect single particles without the restriction of the diffraction limit. By simultane- ously counting the single-photon and two-photon ... More
Highly-reduced Fine-structure splitting in InAs/InP quantum dots offering efficient on-demand 1.55 $μ$m entangled photon emitterJun 03 2008To generate entangled photon pairs via quantum dots (QDs), the exciton fine structure splitting (FSS) must be comparable to the exciton homogeneous line width. Yet in the (In,Ga)As/GaAs QD, the intrinsic FSS is about a few tens $\mu$eV. To achieve photon ... More
A mini review on NiFe-based materials as highly active oxygen evolution reaction electrocatalystsNov 14 2014Oxygen evolution reaction (OER) electrolysis, as an important reaction involved in water splitting and rechargeable metal-air battery, has attracted increasing attention for clean energy generation and efficient energy storage. Nickel/iron (NiFe)-based ... More
Continuous-variable measurement-device-independent multipartite quantum communicationDec 12 2015Jan 25 2016A continuous variable measurement device independent multi-party quantum communication protocol is investigated in this paper. Utilizing distributed continuous variable Greenberger-Horne-Zeilinger state, this protocol can implement both quantum cryptographic ... More
Cross-correlations mediated by Majorana bound statesOct 18 2012Dec 13 2013We consider the correlated parallel transport through two quantum dots which are tunnel-coupled to the ends of a semiconductor nanowire where the Majorana bound states (MBSs) may emerge under proper conditions. In terms of the cross-correlation of currents, ... More
Hidden correlations of exciton complexes in self-assembled quantum dots and ringsDec 08 2008The binding energies of trions ($X^+$, $X^-$) and biexciton (XX) in self-assembled semiconductor quantum dots (QDs) are very sensitive to the geometry and chemical composition of the QDs, and are random from dots to dots. However, in this letter, we show ... More
Giant optical anisotropy in cylindrical self-assembled InAs/GaAs quantum ringsMay 14 2008Using a single-particle atomistic pseudopotential method followed by a many-particle configuration interaction method, we investigate the geometry, electronic structure and optical transitions of a self-assembled InAs/GaAs quantum ring (QR), changing ... More
NeuronBlocks -- Building Your NLP DNN Models Like Playing LegoApr 21 2019When building deep neural network models for natural language processing tasks, engineers often spend a lot of efforts on coding details and debugging, instead of focusing on model architecture design and hyper-parameter tuning. In this paper, we introduce ... More
RI/MOM and RI/SMOM renormalization of overlap quark bilinears on domain wall fermion configurationsOct 24 2017Nov 05 2017Renormalization constants (RCs) of overlap quark bilinear operators on 2+1-flavor domain wall fermion configurations are calculated by using the RI/MOM and RI/SMOM schemes. The scale independent RC for the axial vector current is computed by using a Ward ... More
Effective Strategies for Identifying Model Parameters for Open Quantum SystemsDec 21 2010The problem of identifiability of model parameters for open quantum systems is considered by investigating two-level dephasing systems. We discuss under which conditions full information about the Hamiltonian and dephasing parameters can be obtained. ... More
Gapped topological Fulde-Ferrell-Larkin-Ovchinnikov superfluids with artificial gauge potential and weak interactionDec 25 2017The topological superfluids with Majorana zero modes have not yet been realized in ultracold atoms with Rashba spin-orbit coupling. Here we show that these phases can be realized with an artificial gauge potential, which can be regarded as a site-dependent ... More
Cavity-mediated oscillating and trapping dynamics in a two-component condensateJul 16 2018Cold atoms in cavity provides a new platform for exploring exotic many-body phases. Here we explore the dynamics of a two-component condensate coupled to a finesse cavity, in which the Raman coupling is mediated by pumping laser and cavity mode. In this ... More
A fast point-pattern matching algorithm based on statistical methodMar 22 2019We propose a new pattern-matching algorithm for matching CCD images to a stellar catalogue based statistical method in this paper. The method of constructing star pairs can greatly reduce the computational complexity compared with the triangle method. ... More
On frequency errors of nanomechanical-resonators-based-on quantum computingJun 11 2011We study the consequence of the frequency errors of individual oscillators on the scalability of quantum computing based on nanomechanical resonators. We show the fidelity change of the quantum operation due to the frequency shifts numerically. We present ... More
Strange and Charm Quark Spins from Anomalous Ward IdentityNov 11 2015Apr 24 2017We present a calculation of the strange and charm quark contributions to the nucleon spin from the anomalous Ward identity (AWI). It is performed with overlap valence quarks on 2+1-flavor domain-wall fermion gauge configurations on a $24^3 \times 64$ ... More
Centrality dependence of charmed-meson photoproduction in ultrarelativistic heavy ion collisionsJul 11 2017We calculate the centrality dependence of inclusive cross section of large-pT charmed-meson ($D^{0}$, $D^{*}$, $D^{*+}$, and $D_{s}^{+}$) from heavy quark fragmentation by the hard photoproduction processes for the nucleus-nucleus collisions in ultrarelativistic ... More
Spin-Orbit Driven Transitions Between Mott Insulators and Finite Momentum Superfluids of Bosons in Optical LatticesDec 14 2013Nov 20 2017Synthetic spin-orbit coupling in ultracold atomic gases can be taken to extremes rarely found in solids. We study a two dimensional Hubbard model of bosons in an optical lattice in the presence of spin-orbit coupling strong enough to drive direct transitions ... More
Tunneling Spectroscopy of Atomically-Thin Al2O3 Films for Tunnel JunctionsJan 27 2017Metal-Insulator-Metal tunnel junctions (MIMTJ) are common throughout the microelectronics industry. The industry standard AlOx tunnel barrier, formed through oxygen diffusion into an Al wetting layer, is plagued by internal defects and pinholes which ... More
Constraints on a new alternative model to dark energyFeb 05 2004Nov 17 2004The recent type Ia supernova data suggest that the universe is accelerating now and decelerated in recent past. This may provide the evidence that the standard Friedmann equation needs to be modified. We analyze in detail a new model in the context of ... More
VITAL: VIsual Tracking via Adversarial LearningApr 12 2018The tracking-by-detection framework consists of two stages, i.e., drawing samples around the target object in the first stage and classifying each sample as the target object or as background in the second stage. The performance of existing trackers using ... More
On the Geometry and Topology of Transformation OpticsJan 29 2013Nov 25 2014We generalize the geometrical model of transformation optics to Rieman-Cartan space with torsion by introducing topological defects in physical space. By relaxing the integrable condition, we show explicitly that the generalized equivalent medium are ... More
Fixed points in interacting dark energy modelsNov 11 2008Apr 04 2009The dynamical behaviors of two interacting dark energy models are considered. In addition to the scaling attractors found in the non-interacting quintessence model with exponential potential, new accelerated scaling attractors are also found in the interacting ... More
Unconventional pairings of spin-orbit coupled attractive degenerate Fermi gas in a one dimensional optical latticeApr 11 2014Oct 08 2015Understanding novel pairings in attractive degenerate Fermi gases is crucial for exploring rich superfluid physics. In this report, we reveal unconventional pairings induced by spin-orbit coupling (SOC) in a one-dimensional optical lattice, using a state-of-the-art ... More
Joint Face Hallucination and Deblurring via Structure Generation and Detail EnhancementNov 22 2018We address the problem of restoring a high-resolution face image from a blurry low-resolution input. This problem is difficult as super-resolution and deblurring need to be tackled simultaneously. Moreover, existing algorithms cannot handle face images ... More
$η_{Q}$ meson photoproduction in ultrarelativistic heavy ion collisionsAug 20 2017Jan 03 2018The transverse momentum distributions for inclusive $\eta_{c,b}$ meson described by gluon-gluon interactions from photoproduction processes in relativistic heavy ion collisions are calculated. We considered the color singlet (CS) and color octet (CO) ... More
Efficient semiquantum key distributionNov 07 2018Nov 09 2018Quantum cryptography has attracted much attention in recent years. In most existing quantum cryptographic protocols, players usually need the full quantum power of generating, manipulating or measuring quantum states. Semiquantum cryptography was proposed ... More
Quantum Transport of Bosonic Cold Atoms in Double Well Optical LatticesJan 28 2011Jun 29 2011We numerically investigate, using the time evolving block decimation algorithm, the quantum transport of ultra-cold bosonic atoms in a double well optical lattice through slow and periodic modulation of the lattice parameters (intra- and inter-well tunneling, ... More
Studies of the hydrodynamic evolution of the dense baryonic matter produced in relativistic heavy ion collisionsJul 07 2017Jul 10 2017We use the relativistic perfect-fluid hydrodynamics to describe the space-time evolution of dense baryonic matter produced in the central nucleus-nucleus collisions at HIRFL-CSR, HIAF, FAIR-CBM, NICA-MPD, and RHIC-BES. The transverse flow of the fireball ... More
Evolutionary Game Dynamics for Two Interacting Populations under Environmental FeedbackJun 08 2018We study the evolutionary dynamics of games under environmental feedback using replicator equations for two interacting populations. One key feature is to consider jointly the co-evolution of the dynamic payoff matrices and the state of the environment: ... More
Phase transition in finite density and temperature lattice QCDApr 09 2015We investigate the behavior of the chiral condensate in lattice QCD at finite temperature and finite chemical potential. The study was done using two flavors of light quarks and with a series of $\beta$ and $ma$ at the lattice size $24\times12^{2}\times6$. ... More
Experimental demonstration of spontaneous chirality in a nonlinear microresonatorJul 06 2016Chirality is an important concept that describes the asymmetry property of a system, which usually emerges spontaneously due to mirror symmetry breaking. Such spontaneous chirality manifests predominantly as parity breaking in modern physics, which has ... More
FFLO or Majorana superfluids: The fate of fermionic cold atoms in spin-orbit coupled optical latticesApr 14 2013Jul 10 2013The recent experimental realization of spin-orbit coupling (SOC) for ultra-cold atoms opens a completely new avenue for exploring new quantum matter. In experiments, the SOC is implemented simultaneously with a Zeeman field. Such spin-orbit coupled Fermi ... More
BCS-BEC crossover in spin-orbit coupled two-dimensional Fermi gasesJul 13 2011Jan 04 2012The recent experimental realization of spin-orbit coupling for ultra-cold atoms has generated much interest in the physics of spin-orbit coupled degenerate Fermi gases. Although recently the BCS-BEC crossover in three-dimensional (3D) spin-orbit coupled ... More
LOCld65, A Dual-Channel VCSEL Driver ASIC For Detector Front-End ReadoutJun 22 2018We present the design and the test results of a dual-channel Vertical-Cavity Surface-Emitting Laser (VCSEL) driver ASIC LOCld65 for detector front-end readout. LOCld65 is designed in a commercial 65-nm CMOS technology with a power supply of 1.2 V. LOCld65 ... More
Photonic quantum simulation of ground state configurations of Heisenberg square and checkerboard lattice spin systemsMay 12 2012Photonic quantum simulators are promising candidates for providing insight into other small- to medium-sized quantum systems. The available photonic quantum technology is reaching the state where significant advantages arise for the quantum simulation ... More
BCS-BEC Crossover and Topological Phase Transition in 3D Spin-Orbit Coupled Degenerate Fermi GasesMay 09 2011Nov 06 2011We investigate the BCS-BEC crossover in three dimensional degenerate Fermi gases in the presence of spin-orbit coupling (SOC) and Zeeman field. We show that the superfluid order parameter destroyed by a large Zeeman field can be restored by the SOC. With ... More
Many-body Landau-Zener Transition in Cold Atom Double Well Optical LatticesOct 07 2011Feb 04 2013Ultra-cold atoms in optical lattices provide an ideal platform for exploring many-body physics of a large system arising from the coupling among a series of small identical systems whose few-body dynamics is exactly solvable. Using Landau-Zener (LZ) transition ... More
Majorana Fermions in Semiconducting Nanowires on the Top of Fulde-Ferrell SuperconductorFeb 17 2014The novel idea that spin-orbit coupling (SOC) and $s$-wave pairing can lead to induced $p$-wave pairing at strong magnetic limit has stimulated widespread interests in the whole community for the searching of Majorana Fermions (MFs), a self-hermitian ... More
Landau-Zener-Stuckelberg-Majorana interference in a 3D transmon driven by a chirped microwaveFeb 10 2016By driving a 3D transmon with microwave fields, we generate an effective avoided energy-level crossing. Then we chirp microwave frequency, which is equivalent to driving the system through the avoided energy-level crossing by sweeping the avoided crossing. ... More
Direct observation of excitonic polaron in InAs/GaAs quantum dotsAug 03 2007Aug 15 2007Excitonic polaron is directly demonstrated for the first time in InAs/GaAs quantum dots with photoluminescence method. A new peak ($s'$) below the ground state of exciton ($s$) comes out as the temperature varies from 4.2 K to 285 K, and a huge anticrossing ... More
On the Products $(1^\ell+1)(2^\ell+1)\cdots (n^\ell +1)$, IINov 22 2013In this paper, the following results are proved: (i) For any odd integer $\ell$ with at most two distinct prime factors and any positive integer $n$, the product $(1^\ell+1)(2^\ell+1)\cdots (n^\ell +1)$ is not a powerful number; (ii) For any integer $r\ge ... More
Pretraining-Based Natural Language Generation for Text SummarizationFeb 25 2019In this paper, we propose a novel pretraining-based encoder-decoder framework, which can generate the output sequence based on the input sequence in a two-stage manner. For the encoder of our model, we encode the input sequence into context representations ... More
Harvesting and storing laser energy with graphene-cu compound structureJul 13 2012Aug 15 2012Graphene-metal compound structure has been reported as a novel and outstanding component used in electrical and optical devices. We report on a first-principles study of graphene-cu compound structure, showing its capacity of converting laser energy into ... More
Lyapunov Spectra in SU(2) Lattice Gauge TheoryAug 02 1993We develop a method for calculating the Lyapunov characteristic exponents of lattice gauge theories. The complete Lyapunov spectrum of SU(2) gauge theory is obtained and Kolmogorov-Sinai entropy is calculated. Rapid convergence with lattice size is found. ... More
Existence of divergent Birkhoff normal forms of Hamiltonian functionsJul 29 2003We show that for $n \geq 2$ there exist real analytic Hamiltonian systems on $\mathbf{R}^{2n}$ with non-resonant eigenvalues at a singular point, of which the Birkhoff normal form itself is divergent. The proof of the result is achieved by analyzing how ... More
Strichartz Estimates for Wave equations with Charge Transfer HamiltonianOct 17 2016We prove Strichartz estimates (both regular and reversed) for a scattering state to the wave equation with a charge transfer Hamiltonian in $\mathbb{R}^{3}$: \[ \partial_{tt}u-\Delta u+\sum_{j=1}^{m}V_{j}\left(x-\vec{v}_{j}t\right)u=0. \] The energy estimate ... More
The Lip-lip condition on metric measure spacesAug 14 2012On complete metric spaces that support doubling measures, we show that the validity of a Rademacher theorem for Lipschitz functions can be characterised by Keith's "Lip-lip" condition. Roughly speaking, this means that at almost every point, the infinitesmal ... More
Search for Direct Photons from $\sqrt{s_{NN}}=200GeV$ AuAu Collisions Using a New $π^{0}$ Tagging Method in the PHENIX Experiment at RHICMay 08 2007Direct photons provide a insightful tool to study the different stages of a heavy ion collision, especially the formation of a quark-gluon plasma, without being influenced by the strong interaction and hadronization processes. The yield of direct photons ... More
Rigidity of Derivations in the Plane and in Metric Measure SpacesOct 19 2011Following Weaver we study generalized differential operators, called (metric) derivations, and their linear algebraic properties. In particular, for k = 1, 2 we show that measures on k-dimensional Euclidean space that induce rank-k modules of derivations ... More
A Schoenflies extension theorem for a class of locally bi-Lipschitz homeomorphismsAug 20 2010In this paper we prove a new version of the Schoenflies extension theorem for collared domains in Euclidean n-space: for 1 < p < n, locally bi-Lipschitz homeomorphisms between collared domains with locally p-integrable, second-order weak derivatives admit ... More
Simultaneous Inference Under the Vacuous Orientation AssumptionMay 15 2019I propose a novel approach to simultaneous inference that alleviates the need to specify a correlational structure among marginal errors. The vacuous orientation assumption retains what the normal i.i.d. assumption implies about the distribution of error ... More
Wave equations with moving potentialsOct 30 2016In this paper, we study the endpoint reversed Strichartz estimates along general time-like trajectories for wave equations in $\mathbb{R}^{3}$. We also discuss some applications of the reversed Strichartz estimates and the structure of wave operators ... More
Strichartz Estimates for Charge Transfer ModelsJul 28 2015Jul 31 2015In this note, we prove Strichartz estimates for scattering states of scalar charge transfer models in $\mathbb{R}^{3}$. Based on the idea of the proof of Strichartz estimates which follows \cite{CM,RSS}, we also show the energy of the whole evolution ... More
A Frobenius-Nirenberg theorem with parameterNov 12 2016Nov 29 2017The Newlander-Nirenberg theorem says that a formally integrable complex structure is locally equivalent to the complex structure in the complex Euclidean space. We will show two results about the Newlander-Nirenberg theorem with parameter. The first extends ... More
Measurable Differentiable Structures on Doubling Metric SpacesOct 19 2011Aug 14 2012On metric spaces equipped with doubling measures, we prove that a differentiability theorem holds for Lipschitz functions if and only if the space supports nontrivial (metric) derivations in the sense of Weaver that satisfy an additional infinitesmal ... More
Comment on "Quantification of Macroscopic Quantum Superpositions within Phase Space"Jun 01 2011Jun 02 2011The phase space measure proposed by Lee and Jeong [PRL 106, 220401 (2011)] is shown to be closely related to a well-studied measure in the literature. For pure states, the newly proposed measure is equivalent to an old measure; for mixed states, some ... More
Majorana Fermions Under Uniaxial Stress in Semiconductor-Superconductor HeterostructuresMay 28 2012Feb 04 2013Spin-orbit coupled semiconductor nanowires with Zeeman splitting in proximity contact with bulk $s$-wave superconductivity have recently been proposed as a promising platform for realizing Majorana fermions. However, in this setup the chemical potential ... More
Hole-doped semiconductor nanowire on top of an s-wave superconductor: A new and experimentally accessible system for Majorana fermionsMay 17 2011Mar 14 2012Majorana fermions were envisioned by E. Majorana in 1935 to describe neutrinos. Recently it has been shown that they can be realized even in a class of electron-doped semiconductors, on which ordinary s-wave superconductivity is proximity induced, provided ... More
High-concurrence steady-state entanglement of two hole spins in a quantum dot molecularAug 03 2009Entanglement, a non-trivial phenomena manifested in composite quantum system, can be served as a new type of physical resource in the emerging technology of quantum information and quantum computation. However, a quantum entanglement is fragile to the ... More
Quark Spin in Proton from Anomalous Ward IndentityApr 15 2015We report a quark spin calculation from the anomalous Ward identity with overlap fermions on 2+1 flavor dynamical fermion configurations with light sea quark masses. Such a formulation decomposes the divergence of the flavor-singlet axial-vector current ... More
Naturally Combined Shape-Color Moment Invariants under Affine TransformationsMay 31 2017Jul 27 2017We proposed a kind of naturally combined shape-color affine moment invariants (SCAMI), which consider both shape and color affine transformations simultaneously in one single system. In the real scene, color and shape deformations always exist in images ... More
A general study on the volume dependence of spectral weights in lattice field theorySep 17 2009It has been suggested that the volume dependence of the spectral weight could be utilized to distinguish single and multi-particle states in Monte Carlo simulations. In a recent study using a solvable model, the Lee model, we found that this criteria ... More
Group Invariant Weighing MatricesOct 06 2016Oct 07 2016We investigate the existence problem of group invariant matrices using algebraic approaches. We extend the usual concept of multipliers to group rings with cyclotomic integers as coefficients. This concept is combined with the field descent method and ... More
Group Invariant Weighing MatricesOct 06 2016Mar 02 2018We investigate the existence problem of group invariant matrices using algebraic approaches. We extend the usual concept of multipliers to group rings with cyclotomic integers as coefficients. This concept is combined with the field descent method and ... More
A new alternative model to dark energyApr 09 2004May 08 2004The recent observations of type Ia supernovae strongly support that the universe is accelerating now and decelerated in the recent past. This may be the evidence of the breakdown of the standard Friedmann equation. Instead of a linear function of the ... More
Competing superfluid orders in spin-orbit coupled fermionic cold atom optical latticesMay 09 2013Feb 21 2014The Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) phase, a superconducting state with non-zero total momentum Cooper pairs in a large magnetic field, was first predicted about 50 years ago, and since then became an important concept in many branches of physics. ... More
Observation of Zitterbewegung in a spin-orbit coupled Bose-Einstein condensateJan 04 2013Aug 27 2013Spin-orbit coupled ultra-cold atoms provide an intriguing new avenue for the study of rich spin dynamics in superfluids. In this Letter, we observe Zitterbewegung, the simultaneous velocity (thus position) and spin oscillations, of neutral atoms between ... More
Large Chern Number Topological Superfluids in Coupled Layer SystemAug 13 2014Aug 30 2014We investigate the topological phase transition with large Chern number in a coupled layer system. The topological transitions between different topological superfluids can be realized by controlling the binding energy, interlay tunneling and layer asymmetry ... More
Heteronuclear magnetisms with ultracold spinor bosonic gases in optical latticesNov 03 2017Motivated by recent realizations of spin-1 NaRb mixtures in the experiments, here we investigate heteronuclear magnetism in the Mott-insulating regime. Different from the identical mixtures where the boson (fermion) statistics only admits even (odd) parity ... More
Route to Observable Fulde-Ferrell-Larkin-Ovchinnikov Phases in 3D Spin-Orbit Coupled Degenerate Fermi GasesAug 09 2012Feb 21 2013The Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) phase was first predicted in 2D superconductors about 50 years ago, but so far unambiguous experimental evidences are still lacked. The recently experimentally realized spin-imbalanced Fermi gases may potentially ... More
Searching for Majorana Fermions in 2D Spin-orbit Coupled Fermi Superfluids at Finite TemperatureJan 11 2012Aug 28 2012Recent experimental breakthrough in realizing spin-orbit (SO) coupling for cold atoms has spurred considerable interest in the physics of 2D SO coupled Fermi superfluids, especially topological Majorana fermions (MFs) which were predicted to exist at ... More
Phase-space analysis of interacting phantom cosmologyDec 05 2008Mar 31 2009We perform a detailed phase-space analysis of various phantom cosmological models, where the dark energy sector interacts with the dark matter one. We examine whether there exist late-time scaling attractors, corresponding to an accelerating universe ... More
Detecting Fulde-Ferrell superconductors by an Andreev interferometerNov 19 2013Aug 12 2014We propose an Andreev interferometer, based on a branched Y-junction, to detect the finite momentum pairing in Fulde-Ferrell (FF) superconductors. In this interferometer, the oscillation of subgap conductance is a unique function of phase difference between ... More
Hadron Scattering in an Asymmetric BoxMar 15 2007May 31 2007We propose to study hadron-hadron scattering using lattice QCD in an asymmetric box which allows one to access more non-degenerate low-momentum modes for a given volume. The conventional L\"{u}scher's formula applicable in a symmetric box is modified ... More
Low-energy $D^{*+}D^0_1$ Scattering and the Resonance-like Structure $Z^+(4430)$May 06 2009Low-energy scattering of $D^*$ and $D_1$ meson are studied using quenched lattice QCD with improved lattice actions on anisotropic lattices. The calculation is performed within L\"uscher's finite-size formalism which establishes the relation between the ... More
The transient acceleration from time-dependent interacting dark energy modelsNov 29 2011Sep 20 2013The transient acceleration which the current cosmic acceleration is not eternal is possible by introducing the interaction between dark matter and dark energy. If the energy transfer is from dark energy to dark matter, then it is possible to realize the ... More
The Geometry of Large Tundra Lakes Observed in Historical Maps and Satellite ImagesSep 08 2017Oct 23 2017Tundra lakes are key components of the Arctic climate system because they represent a source of methane to the atmosphere. In this paper, we aim to analyze the geometry of the patterns formed by large ($>0.8$ km$^2$) tundra lakes in the Russian High Arctic. ... More
Majorana fermions in quasi-1D and higher dimensional ultracold fermionic optical latticesOct 28 2013Jan 20 2014We show that Majorana fermions (MFs) exist in two- and three-dimensional (2D,3D) fermionic optical lattices with strictly 1D spin-orbit coupling (SOC) which has already been realized in ex- periments. For a quasi-1D topological BCS superfluid, there are ... More