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Results for "Huan Yang"

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Black Hole Discharge: very-high-energy gamma rays from black hole-neutron star mergersMay 12 2019With mass ratio larger than $\sim 5$, star disruption is not expected for a black hole merging with a neutron star during the final plunge phase. In the late inspiral stage, the black hole is likely charged as it cuts through the magnetic field carried ... More
Nonstandard Hopf bifurcation in switchedJan 13 2010This paper presents an analysis on nonstandard generalized Hopf bifurcation in a class of switched systems where the lost of stability of linearized systems is not due to the crossing of their complex conjugate eigenvalues but relevant to the switching ... More
Probing the noncommutative effects of phase space in the time-dependent Aharonov-Bohm effectMay 12 2016We study the noncommutative corrections on the time-dependent Aharonov-Bohm effect when both the coordinate-coordinate and momentum-momentum noncommutativities are considered. This study is motivated by the recent observation that there is no net phase ... More
Time-dependent Aharonov-Bohm effect on the noncommutative spaceMar 17 2016Jun 09 2016We study the time-dependent Aharonov-Bohm effect on the noncommutative space. Because there is no net Aharonov-Bohm phase shift in the time-dependent case on the commutative space, therefore, a tiny deviation from zero indicates new physics. Based on ... More
Learning Social Circles in Ego Networks based on Multi-View Social GraphsJul 16 2016Dec 24 2016In social network analysis, automatic social circle detection in ego-networks is becoming a fundamental and important task, with many potential applications such as user privacy protection or interest group recommendation. So far, most studies have focused ... More
A General Framework for Enhancing Sparsity of Generalized Polynomial Chaos ExpansionsJul 10 2017Nov 26 2018Compressive sensing has become a powerful addition to uncertainty quantification when only limited data is available. In this paper we provide a general framework to enhance the sparsity of the representation of uncertainty in the form of generalized ... More
Learning Deep Mean Field Games for Modeling Large Population BehaviorNov 08 2017Apr 22 2018We consider the problem of representing collective behavior of large populations and predicting the evolution of a population distribution over a discrete state space. A discrete time mean field game (MFG) is motivated as an interpretable model founded ... More
Inspiraling eccentric binary neutron stars: orbital motion and tidal resonanceApr 24 2019We study the orbital evolution of eccentric binary neutron stars. The orbit is described as a Quasi-Keplarian orbit with perturbations due to tidal couplings. We find that the tidal interaction between stars contributes to orbital precession, in addition ... More
Seiberg-Witten map and quantum phase effects for neutral Dirac particle on noncommutatiave planeOct 23 2014Mar 19 2016We provide a new approach to study the noncommutative effects on the neutral Dirac particle with anomalous magnetic or electric dipole moment on the noncommutative plane. The advantages of this approach are demonstrated by investigating the noncommutative ... More
Three Dimensional Convolutional Neural Network Pruning with Regularization-Based MethodNov 19 2018In recent years, three-dimensional convolutional neural network (3D CNN) is intensively applied in video analysis and receives good performance. However, 3D CNN leads to massive computation and storage consumption, which hinders its deployment on mobile ... More
Nearly second-order asymptotic optimality of sequential change-point detection with one-sample updatesMay 19 2017Dec 04 2017Sequential change-point detection when the distribution parameters are unknown is a fundamental problem in statistics and machine learning. When the post-change parameters are unknown, we consider a set of detection procedures based on sequential likelihood ... More
Optimization Algorithm Inspired Deep Neural Network Structure DesignOct 03 2018Deep neural networks have been one of the dominant machine learning approaches in recent years. Several new network structures are proposed and have better performance than the traditional feedforward neural network structure. Representative ones include ... More
Localization Trajectory and Chern-Simons axion coupling for Bilayer Quantum Anomalous Hall SystemsDec 07 2018Mar 12 2019Quantum anomalous Hall (QAH) multilayers provide a platform of topological materials with high Chern numbers. We investigate the localization routes of bilayer QAH systems with Chern number C = 2 under strong disorder, by numerical simulations on their ... More
Experimental investigation of nonlocal advantage of quantum coherenceMay 16 2019Nonlocal advantage of quantum coherence (NAQC) based on coherence complementarity relations is generally viewed as a stronger nonclassical correlation than Bell nonlocality. An arbitrary two-qubit state with NAQC must be an entangled state, which demonstrates ... More
A Convex Relaxation Barrier to Tight Robustness Verification of Neural NetworksFeb 23 2019May 03 2019Verification of neural networks enables us to gauge their robustness against adversarial attacks. Verification algorithms fall into two categories: exact verifiers that run in exponential time and relaxed verifiers that are efficient but incomplete. In ... More
Hall conductivity in the cosmic defect and dislocation space-timeJan 31 2016Aug 28 2016Influences of topological defect and dislocation on conductivity behavior of charge carries in external electromagnetic fields are studied. Particularly the quantum Hall effect is investigated in detail. It is found that the nontrivial deformations of ... More
Gravitational floating orbits around hairy black holesAug 08 2018Mar 10 2019We show that gravitational floating orbits may exist for black holes with rotating hairs. These black hole hairs could originate from the superradiant growth of a light axion field around the rotating black holes. If a test particle rotates around the ... More
Superconductivity with two-fold symmetry in topological superconductor SrxBi2Se3Jul 21 2016Topological superconductivity is the quantum condensate of paired electrons with an odd parity of the pairing function. One of the candidates is the triplet pairing superconductor derived from topological insulator Bi2Se3 by chemical doping. Theoretically ... More
Atomic radius and charge parameter uncertainty in biomolecular solvation energy calculationsMay 29 2017Dec 22 2017Atomic radii and charges are two major parameters used in implicit solvent electrostatics and energy calculations. The optimization problem for charges and radii is under-determined, leading to uncertainty in the values of these parameters and in the ... More
Zero-Energy Modes on Superconducting Bismuth Islands Deposited on Fe(Te,Se)May 14 2019Topological superconductivity is one of the frontier research directions in condensed matter physics. One of the unique elementary excitations in topological superconducting state is the Majorana fermion (mode) which is its own antiparticle and obeys ... More
Modulated Pulses Based High Spatial Resolution Distributed Fiber System for Multi-Parameter SensingSep 01 2016We demonstrate a hybrid distributed fiber sensing system for multi-parameter detection. The integration of phase-sensitive optical time domain reflectometry ({\Phi}-OTDR) and Brillouin optical time domain reflectometry (B-OTDR) enables measurement of ... More
Hall effect and magnetoresistance in single crystals of NdFeAsO$_{1-x}$F$_{x}$Jun 10 2008Sep 09 2008Hall effect and magnetoresistance have been measured on single crystals of $NdFeAsO_{1-x}F_{x}$ with x = 0 ($T_c$ = 0 $ $K) and x = 0.18 ($T_c$ = 50 $ $K). For the undoped samples, strong Hall effect and magnetoresistance with strong temperature dependence ... More
The melilite-type compound (Sr$_{1-x}$,$A_x$)$_2$MnGe$_2$S$_6$O ($A$=K, La) being a room temperature ferromagnetic semiconductorApr 12 2018The seeking of room temperature ferromagnetic semiconductors, which take advantages of both the charge and spin degrees of freedom of electrons to realize a variety of functionalities in devices integrated with electronic, optical, and magnetic storage ... More
Three-Dimensional Phase Field Simulations of Hysteresis and Butterfly Loops by Finite Volume MethodApr 23 2015Three-dimensional (3D) simulations of ferroelectric hysteresis and butterfly loops have been carried out based on solving the time dependent Ginsburg-Landau equations by using a finite volume method. The influence of externally mechanical loadings with ... More
Multiple Magnetization Peaks and New Type of Vortex Phase Transitions in Ba0.6K0.4Fe2As2Nov 25 2011Nov 30 2011Magnetization and its relaxation have been measured on Ba0.6K0.4Fe2As2 single crystals with Tc = 39 K. The magnetization hysteresis loops (MHLs) exhibit flux jumps in the low temperature region, and a second peak-effect in the intermediate temperature ... More
Quantifying the influence of conformational uncertainty in biomolecular solvationAug 24 2014Aug 31 2015Biomolecules exhibit conformational fluctuations near equilibrium states, inducing uncertainty in various biological properties in a dynamic way. We have developed a general method to quantify the uncertainty of target properties induced by conformational ... More
Surface Water Formation on the Natural Surface under Super-saturation: from Local Water Balance to Air Pollutant DepositionMay 19 2019Heterogeneous nucleation and subsequent growth of surface water occur on the natural substrate when the water vapor concentration reached the point of super-saturation. This study focuses on the parameterization of super-saturation on the canopy-air interface ... More
Decays $D^+_{(s)}\to π(K)^{+}\ell^+\ell^-$ and $D^0\to \ell^+\ell^-$ in the MSSM with and without R-parityAug 31 2014Nov 26 2014We study the rare decays $D^+\to \pi^{+}\ell^+\ell^-$, $D^+_s\to K^{+}\ell^+\ell^-$ and $D^0\to \ell^+\ell^-(\ell=e,\mu)$ in the minimal supersymmetic standard model with and without R-parity. Using the strong constraints on relevant supersymmetric parameters ... More
Perfect charge compensation in extremely large magnetoresistance materials LaSb and LaBi revealed by the first-principles calculationsFeb 16 2016By the first-principles electronic structure calculations, we have systematically studied the electronic structures of recently discovered extremely large magnetoresistance (XMR) materials LaSb and LaBi. We find that both LaSb and LaBi are semimetals ... More
Effects of Preheated Clusters on the CMB SpectrumOct 15 2002Nov 15 2002Mounting evidence from $x$-ray observations reveals that bound objects should receive some form of energy in the past injected from non-gravitaional sources. We report that an instantaneous heating scheme, for which gases in dense regions were subjected ... More
Discovery of An Active Intermediate-Mass Black Hole Candidate in the Barred Bulgeless Galaxy NGC 3319Oct 24 2018We report the discovery of an active intermediate-mass black hole (IMBH) candidate in the center of nearby barred bulgeless galaxy $\rm NGC~3319$. The point X-ray source revealed by archival Chandra and XMM-Newton observations is spatially coincident ... More
Scrutinizing the double superconducting gaps and strong coupling pairing in (Li1-xFexOH)FeSeJun 15 2015Aug 05 2015In the iron based superconductors, one of the on-going frontier studies is about the pairing mechanism. The recent interest concerns the high temperature superconductivity and its intimate reason in the monolayer FeSe thin films. The challenge here is ... More
Sign reversal superconducting gaps revealed by phase referenced quasi-particle interference of impurity induced bound states in (Li$_{1-x}$Fe$_x$)OHFe$_{1-y}$Zn$_y$SeMar 28 2018By measuring the spatial distribution of differential conductance near impurities on Fe sites, we have obtained the quasi-particle interference (QPI) patterns in the (Li$_{1-x}$Fe$_x$)OHFe$_{1-y}$Zn$_y$Se superconductor with only electron Fermi surfaces. ... More
On the largest sizes of certain simultaneous core partitions with distinct partsSep 02 2017Motivated by Amdeberhan's conjecture on $(t,t+1)$-core partitions with distinct parts, various results on the numbers, the largest sizes and the average sizes of simultaneous core partitions with distinct parts were obtained by many mathematicians recently. ... More
Roots of polynomials and the Sendov's conjectureJun 03 2018Apr 01 2019In this paper we first prove that a simple root of a polynomial satisfies the Sendov's conjecture. As the multiple roots trivially satisfy the Sendov's conjecture we conclude that the Sendov's conjecture holds true.
The growth of dimension of cohomology of semipositive line bundles on Hermitian manifoldsOct 23 2018In this paper, we study the dimension of cohomology of semipositive line bundles over Hermitian manifolds, and obtain an asymptotic estimate for the dimension of the space of harmonic $(0,q)$-forms with values in high tensor powers of a semipositive line ... More
A variational model with fractional-order regularization term arising in registration of diffusion tensor imageNov 23 2016In this paper, a new variational model with fractional-order regularization term arising in registration of diffusion tensor image(DTI) is presented. Moreover, the existence of its solution is proved to ensure that there is a regular solution for this ... More
State-to-state endothermic and nearly thermoneutral reactions in an ultracold atom-dimer mixtureAug 29 2017Chemical reactions at ultracold temperature provide an ideal platform to study chemical reactivity at the fundamental level, and to understand how chemical reactions are governed by quantum mechanics. Recent years have witnessed the remarkable progress ... More
A theoretical analysis and determination of the technical requirements for a Bragg diffraction-based cold atom interferometry gravimeterMay 15 2018We present here a new type of cold atom interferometry gravimeter based on Bragg diffraction, which is able to increase the gravity measurement sensitivity and stability of common Raman atom gravimeters significantly. By comparing with Raman transition, ... More
Fully gapped superconductivity in In-doped topological crystalline insulator Pb$_{0.5}$Sn$_{0.5}$TeMay 04 2015Superconductors derived from topological insulators and topological crystalline insulators by doping have long been considered to be candidates as topological superconductors. Pb$_{0.5}$Sn$_{0.5}$Te is a topological crystalline insulator with mirror symmetry ... More
Existence of periodic orbits in three-dimensional piecewise linear systemsJan 14 2010Based on the results about the invariant cones appeared in the literature this paper analyses the existence of periodic orbits in three-dimensional continuous piecewise linear homogeneous systems with two zones, and a necessary and sufficient condition ... More
LnPd$_{2}$Sn (Ln=Sc, Y, Lu) class of Heusler alloys for topological superconductivityNov 15 2018Based on the first-principles electronic structure calculations and the symmetry analysis, we predict that the topological superconductivity may occur on the surface of the LnPd$_{2}$Sn (Ln=Sc, Y, Lu) class of Heusler alloys. The calculated electronic ... More
Warped embeddings between Einstein manifoldsFeb 04 2010Warped embeddings from a lower dimensional Einstein manifold into a higher dimensional one are analyzed. Explicit solutions for the embedding metrics are obtained for all cases of codimension 1 embeddings and some of the codimension n>1 cases. Some of ... More
Magnetosphere of a spinning black hole and the role of the current sheetMay 15 2018Jul 05 2018We revisit the problem of a spinning black hole immersed in a uniformly magnetized plasma within the context of force-free electrodynamics. Such configurations have been found to relax to stationary jetlike solutions that are powered by the rotational ... More
Low Temperature Specific Heat of Optimally Doped BaFe$_{2-x}$$TM_x$As$_{2}$ ($TM$ = Co and Ni) Single Crystals: Constraint on the Pairing GapJun 14 2010Low temperature specific heat has been measured in optimally doped and highly overdoped non-superconducting BaFe$_{2-x}$TM$_x$As$_{2}$ ($TM$ = Co and Ni) single crystals. By using the data of the overdoped samples, we successfully removed the phonon contribution ... More
Quantum many-body simulation using monolayer exciton-polaritons in coupled-cavitiesMar 08 2016Apr 18 2017Quantum simulation is a promising approach to understand complex strongly correlated many-body systems using relatively simple and tractable systems. Photon-based quantum simulators have great advantages due to the possibility of direct measurements of ... More
Critical Fields and Anisotropy of NdO0.82F0.18FeAs Single CrystalsJun 03 2008The newly discovered iron-based superconductors have stimulated enormous interests in the field of superconductivity. Since the new superconductor is a layered system, the anisotropy is a parameter with the first priority to know. Meanwhile any relevant ... More
Existence and bifurcation of homoclinic orbits in planar piecewise linear systemsJul 01 2009The existence and bifurcation of homoclinic orbits in planar piecewise linear homogeneous systems with two regions separated by a discontinuity boundary are investigated in this paper. In addition, existence of periodic orbits and stability of the origin ... More
Test of the notch technique for determining the radial sensitivity of the optical model potentialAug 10 2015Detailed investigations on the notch technique are performed on the ideal data generated by the optical model potential parameters extracted from the 16O+208Pb system at the laboratory energy of 129.5 MeV, to study the sensitivities of this technique ... More
Drive the Dirac Electrons into Cooper Pairs in SrxBi2Se3Apr 27 2016Topological superconductor is a very interesting and frontier topic in condensed matter physics1. Despite the tremendous efforts in exploring the topological superconductivity, its presence is however still under heavy debates. The Dirac electrons are ... More
Global Crustal Dynamics of Magnetars in Relation to their Bright X-ray OutburstsAug 08 2016This paper considers the yielding response of a neutron star crust to smooth, unbalanced Maxwell stresses imposed at the core-crust boundary, and the coupling of the dynamic crust to the external magnetic field. Stress buildup and yielding in a magnetar ... More
Two-field Kähler moduli inflation on large volume moduli stabilizationApr 23 2008Aug 17 2008In this paper we present a two-field inflation model, which distinguishes itself with a non-canonical kinetic lagrangian and comes from the large volume approach to the moduli stabilization in flux compactification of type IIB superstring on a Calabi-Yau ... More
Turbulent Black HolesFeb 20 2014Mar 03 2014We show that rapidly-spinning black holes can display turbulent gravitational behavior which is mediated by a new type of parametric instability. This instability transfers energy from higher temporal and azimuthal spatial frequencies to lower frequencies--- ... More
The Dawn Light of Blueberry Galaxies: Spectroscopic and Photometric Studies of two Starburst Dwarf GalaxiesJun 26 2018Aug 24 2018A population of so-called "blueberry" starbursting dwarf galaxies with extremely blue colors, low-metallicities, and enormous ionization ratios, has recently been found by Yang et al. (2017). Yet we still do not know their detailed properties, such as ... More
FSNet: Compression of Deep Convolutional Neural Networks by Filter SummaryFeb 08 2019Feb 13 2019We present a novel method of compression of deep Convolutional Neural Networks (CNNs). Our method reduces the number of parameters of each convolutional layer by learning a 3D tensor termed Filter Summary (FS). The convolutional filters are extracted ... More
Highly Anisotropic and Robust Excitons in Monolayer Black PhosphorusNov 06 2014Semi-metallic graphene and semiconducting monolayer transition metal dichalcogenides (TMDCs) are the two-dimensional (2D) materials most intensively studied in recent years. Recently, black phosphorus emerged as a promising new 2D material due to its ... More
Low-cost high-efficiency solar steam generation by wick material with graphite micro/nano particlesFeb 17 2017Jul 08 2017Generating water steam by solar energy is a significant process for many fields. In this paper, a low-cost high-efficiency wick type steam generator is proposed. It's based on the heat localization and thin-film evaporation. The measurements show that ... More
Non-adiabatic elimination of auxiliary modes in continuous quantum measurementsAug 03 2011Aug 31 2011When measuring a complex quantum system, we are often interested in only a few degrees of freedom-the plant, while the rest of them are collected as auxiliary modes-the bath. The bath can have finite memory (non-Markovian), and simply ignoring its dynamics, ... More
FSNet: Compression of Deep Convolutional Neural Networks by Filter SummaryFeb 08 2019We present a novel method of compression of deep Convolutional Neural Networks (CNNs). The proposed method reduces the number of parameters of each convolutional layer by learning a 3D tensor termed Filter Summary (FS). The convolutional filters are extracted ... More
Tidal deformability of boson stars and dark matter clumpsJun 09 2016Aug 21 2017In this work we consider minimally-coupled boson stars immersed in a tidal environment and compute their tidal deformability to leading order. We also describe an approximate correspondence between Newtonian boson star configurations (described by the ... More
The New Extended Left-Right Symmetric Grand Unified Model with SO(3) Family SymmetryJan 02 2009Apr 22 2009We suggest a new left-right symmetric grand unified model by extending Pati-Salam group to contain an isospin SU(2) and a flavor SO(3) subgroup, where the superheavy fermions are introduced as a mirror to the low-energy standard model fermions. The model ... More
On the Anisotropy of Nuclei Mid-Infrared Radiation in Nearby Active Galactic NucleiNov 17 2014In the center of active galactic nuclei (AGN), the dusty torus absorb the radiation from the central engine and re-emit in mid-infrared (MIR). Observations have detected moderate anisotropy in the dust MIR emission, in the way that type 1 AGNs (type1s) ... More
Tidal deformability of dark matter clumpsJun 09 2016We analyze the tidal deformability of a clump of dark matter particles, modelled by the collisionless Boltzmann equation. We adopt a wave-mechanical approach to the problem, in which the dynamical equations are approximated by a set of Schr\"{o}dinger-Poisson ... More
Magnetosphere of a Kerr black hole immersed in magnetized plasma and its perturbative mode structureMar 23 2015Jun 19 2015This work studies jet-like electromagnetic configurations surrounding a slowly-spinning black-hole immersed in a uniformly magnetized force-free plasma. In the first part of this work, we present a family of stationary solutions that are jet-capable. ... More
Self-torque and angular momentum balance for a spinning charged sphereMay 01 2018Oct 29 2018Angular momentum balance is examined in the context of the electrodynamics of a spinning charged sphere, which is allowed to possess any variable angular velocity. We calculate the electric and magnetic fields of the (hollow) sphere, and express them ... More
Can we distinguish low mass black holes in neutron star binaries?Oct 16 2017Nov 29 2018The detection of gravitational waves from coalescing binary neutron stars represents another milestone in gravitational-wave astronomy. However, since LIGO is currently not as sensitive to the merger/ringdown part of the waveform, the possibility that ... More
An Empirical Study on Regularization of Deep Neural Networks by Local Rademacher ComplexityFeb 03 2019Feb 14 2019Regularization of Deep Neural Networks (DNNs) for the sake of improving their generalization capability is important and challenging. The development in this line benefits theoretical foundation of DNNs and promotes their usability in different areas ... More
Multi-band effect in the noncentrosymmetric superconductors Mg_{12-δ}Ir_{19}B_{16} revealed by Hall effect and magnetoresistance measurementsJun 09 2010We report the longitudinal resistivity and Hall effect measurements on the noncentrosymmetric superconducting Mg$_{12-\delta}$Ir$_{19}$B$_{16}$ samples with different critical transition temperatures. A strong temperature dependence of the Hall coefficient ... More
Femtosecond Laser-induced Crystallization of Amorphous Sb2Te3 film and Coherent Phonon Spectroscopy Characterization and Optical Injection of Electron SpinsOct 12 2011A femtosecond laser-irradiated crystallizing technique is tried to convert amorphous Sb2Te3 film into crystalline film. Sensitive coherent phonon spectroscopy (CPS) is used to monitor the crystallization of amorphous Sb2Te3 film at the original irradiation ... More
Ly$α$ profile, dust, and prediction of Ly$α$ escape fraction in Green Pea GalaxiesJan 07 2017Jul 27 2017We studied Lyman-$\alpha$ (Ly$\alpha$) escape in a statistical sample of 43 Green Peas with HST/COS Ly$\alpha$ spectra. Green Peas are nearby star-forming galaxies with strong [OIII]$\lambda$5007 emission lines. Our sample is four times larger than the ... More
Fully Band Resolved Scattering Rate in MgB2 Revealed by Nonlinear Hall Effect and Magnetoresistance MeasurementsFeb 23 2008Aug 13 2008We have measured the normal state temperature dependence of the Hall effect and magnetoresistance in epitaxial MgB2 thin films with variable disorders characterized by the residual resistance ratio RRR ranging from 4.0 to 33.3. A strong nonlinearity of ... More
Towards an understanding of the force-free magnetosphere of rapidly spinning black holesSep 01 2014The ability of a plasma surrounding spinning black holes to extract rotational energy and power energetic emissions has been recognized as a key astrophysical phenomenon. Important insights into the nature of this process are obtained through the analysis ... More
Quantum correlation of light mediated by gravityJan 17 2019Mar 07 2019We consider using the quantum correlation of light in two optomechanical cavities, which are coupled to each other through the gravitational interaction of their end mirrors, to probe the quantum nature of gravity. The optomechanical interaction coherently ... More
Direct visualization of sign reversal s^+- superconducting gaps in FeTe0.55Se0.45Oct 15 2018In many unconventional superconductors, the pairing of electrons is driven by the repulsive interaction, which leads to the sign reversal of superconducting gaps along the Fermi surfaces (FS) or between them. However, to measure this sign change is not ... More
Gap Anisotropy in Iron-Based Superconductors: A Point-Contact Andreev Reflection Study of BaFe$_{2-x}$Ni$_{x}$As$_2$ Single CrystalsJun 15 2011Nov 11 2011We report a systematic investigation on c-axis point-contact Andreev reflection (PCAR) in BaFe$_{2-x}$Ni$_x$As$_2$ superconducting single crystals from underdoped to overdoped regions (0.075 $\leq x\leq 0.15$). At optimal doping ($x=0.1$) the PCAR spectrum ... More
Tidal resonance in extreme mass-ratio inspiralsApr 30 2019We describe a new class of resonances for extreme mass-ratio inspirals (EMRIs): tidal resonances, induced by the tidal gravity of nearby stars or stellar-mass black holes. A tidal resonance can be viewed as a general relativistic extension of the Kozai-Lidov ... More
Directly visualizing the sign change of d-wave superconducting gap in Bi2Sr2CaCu2O8+δ by phase-referenced quasiparticle interferenceAug 19 2018The superconducting state is achieved by the condensation of Cooper pairs and is protected by the superconducting gap. The pairing interaction between the two electrons of a Cooper pair determines the superconducting gap function. Thus, it is very pivotal ... More
Testing Gravity with Pulsar Scintillation MeasurementsJun 10 2016We propose to use pulsar scintillation measurements to test predictions of alternative theories of gravity. Comparing to single-path pulsar timing measurements, the scintillation measurements can achieve a factor of 10^5 improvement in timing accuracy, ... More
Reveal non-Markovianity of open quantum systems via local operationsNov 25 2011Non-Markovianity, as an important feature of general open quantum systems, is usually difficult to quantify with limited knowledge of how the plant that we are interested in interacts with its environment-the bath. It often happens that the reduced dynamics ... More
First-Order Perturbative Hamiltonian Equations of Motion for a Point Particle Orbiting a Schwarzschild Black HoleNov 23 2012We formulate a spherical harmonically decomposed 1+1 scheme to self-consistently evolve the trajectory of a point particle and its gravitational metric perturbation to a Schwarzschild background spacetime. Following the work of Moncrief, we write down ... More
I-V characteristics of the vortex state in MgB2 thin filmsApr 02 2007Oct 30 2007The current-voltage (I-V) characteristics of various MgB2 films have been studied at different magnetic fields parallel to c-axis. At fields \mu0H between 0 and 5T, vortex liquid-glass transitions were found in the I-V isotherms. Consistently, the I-V ... More
On the Complexity Analysis of the Primal Solutions for the Accelerated Randomized Dual Coordinate AscentJul 01 2018Dual first-order methods are essential techniques for large-scale constrained convex optimization. However, when recovering the primal solutions, we need $T(\epsilon^{-2})$ iterations to achieve an $\epsilon$-optimal primal solution when we apply an algorithm ... More
Provable Accelerated Gradient Method for Nonconvex Low Rank OptimizationFeb 16 2017Mar 17 2019Optimization over low rank matrices has broad applications in machine learning. For large scale problems, an attractive heuristic is to factorize the low rank matrix to a product of two much smaller matrices. In this paper, we study the nonconvex problem ... More
Revisit cosmic ray propagation by using $^{1}$H, $^{2}$H, $^{3}$He and $^{4}$HeSep 13 2018Dec 21 2018The secondary-to-primary ratios are unique tools to investigate cosmic ray propagation mechanisms. In this work, we use the latest data of deuteron-to-helium~4 ratio and helium~3-to-helium~4 ratio measured by PAMELA combined with other Z$\leq$2 primary ... More
Decay of solutions to the three-dimensional generalized Navier-Stokes equationsJun 07 2014In this paper, we first obtain the temporal decay estimates for weak solutions to the three dimensional generalized Navier-Stokes equations. Then, with these estimates at disposal, we obtain the temporal decay estimates for higher order derivatives of ... More
Characterizations of compact sets in fuzzy sets spaces with $L_p$ metricAug 29 2015Mar 06 2016Diamond gave compact criteria in fuzzy numbers space endowed with $L_p$ metric and compact criteria in the space of fuzzy star-shaped numbers with respect to the origin endowed with $L_p$ metric. However, these compact criteria are wrong. Wu and Zhao ... More
Analysis and Design of Phase Desynchronization in Pulse-coupled OscillatorsMar 10 2016By spreading phases on the unit circle, desynchronization algorithm is a powerful tool to achieve round-robin scheduling, which is crucial in applications as diverse as media access control of communication networks, realization of analog-to-digital converters, ... More
Renormalization group flows and quantum phase transitions: fidelity versus entanglementApr 23 2007We compare the roles of fidelity and entanglement in characterizing renormalization group flows and quantum phase transitions. It turns out that the scaling parameter extracted from fidelity for different ground states succeeds to capture nontrivial information ... More
Some fully nonlinear problems on manifolds with boundary of negative admissible curvatureFeb 16 2011Feb 19 2011In this paper, we consider a fully nonlinear problem on manifolds with boundaries of negative admissible curvatures. As a consequence, we conclude the existence of certain types of metrics on the general differential manifolds with boundaries.
Gradient-based stochastic optimization methods in Bayesian experimental designDec 10 2012Dec 26 2014Optimal experimental design (OED) seeks experiments expected to yield the most useful data for some purpose. In practical circumstances where experiments are time-consuming or resource-intensive, OED can yield enormous savings. We pursue OED for nonlinear ... More
SO(1,1) dark energy model and the universe transitionMay 07 2004Sep 18 2004We suggest a scalar model of dark energy with the SO(1,1) symmetry. The model may be reformulated in terms of a real scalar field $\Phi$ and the scale factor $a$ so that the Lagrangian may be decomposed as that of the real quintessence model plus the ... More
Schrodinger-Poisson system with steep potential wellOct 19 2009We study the following Schr\"odinger-Poisson system (P_\lambda)\{ll} -\Delta u + (1+\mu g(x))u+\lambda \phi (x) u =|u|^{p-1}u, x\in \mathbb{R}^3,
Polynomiality of certain average weights for oscillating tableauxSep 02 2017We prove that a family of average weights for oscillating tableaux are polynomials in two variables, namely, the length of the oscillating tableau and the size of the ending partition, which generalizes a result of Hopkins and Zhang. Several explicit ... More
Polynomiality of some hook-content summations for doubled distinct and self-conjugate partitionsJan 17 2016In 2009, the first author proved the Nekrasov-Okounkov formula on hook lengths for integer partitions by using an identity of Macdonald in the framework of type $\widetilde A$ affine root systems, and conjectured that some summations over the set of all ... More
Failure of Parameter Identification Based on Adaptive Synchronization TechniquesDec 30 2006Mar 27 2007In the paper, several concrete examples, as well as their numerical simulations, are given to show that parameter identification based on the so-called adaptive synchronization techniques might be failed if those functions with parameters pending for ... More
Sequential Bayesian optimal experimental design via approximate dynamic programmingApr 28 2016The design of multiple experiments is commonly undertaken via suboptimal strategies, such as batch (open-loop) design that omits feedback or greedy (myopic) design that does not account for future effects. This paper introduces new strategies for the ... More
Difference operators for partitions and some applicationsAug 04 2015Jan 18 2018Motivated by the Nekrasov-Okounkov formula on hook lengths, the first author conjectured that the Plancherel average of the $2k$-th power sum of hook lengths of partitions with size $n$ is always a polynomial of $n$ for any $k\in \mathbb{N}$. This conjecture ... More
Tadpole and Anomaly Cancellation Conditions in D-brane Orbifold ModelsOct 16 2002Oct 30 2002We derive and generalize the RR twisted tadpole cancellation conditions necessary to obtain consistent D=4, Z_N orbifold compactifications of Type IIB string theory. At least two different types of branes (or antibranes with opposite RR charges) are introduced ... More
Effect of scalar leptoquarks on the lepton flavor violation decays of B mesonMay 14 2018Jan 09 2019Leptoquarks have been suggested to solve a variety of discrepancies between the expected and observed phenomenon. In this paper, we investigate the effect of scalar leptoquarks on the lepton flavor violating B meson rare decays which involve the quark ... More
Enhancing Sparsity of Hermite Polynomial Expansions by Iterative RotationsJun 14 2015Nov 16 2015Compressive sensing has become a powerful addition to uncertainty quantification in recent years. This paper identifies new bases for random variables through linear mappings such that the representation of the quantity of interest is more sparse with ... More