Results for "Pei Liu"

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Comparing neutron star predictions by various microscopic modelsJun 01 2009We calculate several neutron star properties, for static and/or rotating stars, using equations of state based on different microscopic models. These include our Dirac-Brueckner-Hartree-Fock model and others derived from the non-relativistic Brueckner-Hartree-Fock ... More
The neutron skin of $^{208}$Pb and the density dependence of the symmetry energyDec 29 2008Jan 19 2009We explore neutron skin predictions for $^{208}$Pb in relation to the symmetry pressure in various microscopic models based on realistic nucleon-nucleon potentials and either the Dirac-Brueckner-Hartree-Fock approach or the conventional Brueckner-Hartree-Fock ... More
Extending two Higgs doublet models for two-loop neutrino mass generation and one-loop neutrinoless double beta decayNov 07 2016Nov 10 2016We extend some two Higgs doublet models, where the Yukawa couplings for the charged fermion mass generation only involve one Higgs doublet, by two singlet scalars respectively carrying a singly electric charge and a doubly electric charge. The doublet ... More
Sommerfeld's quantum condition of action and the spectra of Schwarzschild black holeAug 14 2003If the situation of quantum gravity nowadays is nearly the same as that of the quantum mechanics in it's early time of Bohr and Sommerfeld, then a first step study of the quantum gravity from Sommerfeld's quantum condition of action might be helpful. ... More
Lie bialgebra structures on the twisted Heisenberg-Virasoro algebraJul 23 2010Mar 31 2012In this paper we investigate Lie bialgebra structures on the twisted Heisenberg-Virasoro algebra. With the classifications of Lie bialgebra structures on the Virasoro algebra, we determined such structures on the twisted Heisenberg-Virasoro algebra. Moreover, ... More
Self-energy-modified Poisson-Nernst-Planck equations: WKB approximation and finite-difference approachesApr 01 2014Jul 19 2014We propose a modified Poisson-Nernst-Planck (PNP) model to investigate charge transport in electrolytes of inhomogeneous dielectric environment. The model includes the ionic polarization due to the dielectric inhomogeneity and the ion-ion correlation. ... More
Phase diagram of the off-diagonal Aubry-André modelSep 22 2016We study a one-dimensional quasiperiodic system described by the off-diagonal Aubry-Andr\'{e} model and investigate its phase diagram by using the symmetry and the multifractal analysis. It was shown in a recent work ({\it Phys. Rev. B} {\bf 93}, 205441 ... More
Modified Poisson-Nernst-Planck model with accurate Coulomb correlation in variable mediaNov 20 2016We derive a set of modified Poisson-Nernst-Planck (PNP) equations for ion transport from the variation of the free energy functional which includes the many-body Coulomb correlation in media of variable dielectric coefficient. The correlation effects ... More
A Cohomological Characterization of Leibniz Central Extensions of Lie AlgebrasMay 15 2006Oct 28 2006Mainly motivated by Pirashvili's spectral sequences on a Leibniz algebra, a cohomological characterization of Leibniz central extensions of Lie algebras is given based on Corollary 3.3 and Theorem 3.5. In particular, as applications, we obtain the cohomological ... More
The Urge to Merge: When Cellular Service Providers Pool CapacityNov 08 2011As cellular networks are turning into a platform for ubiquitous data access, cellular operators are facing a severe data capacity crisis due to the exponential growth of traffic generated by mobile users. In this work, we investigate the benefits of sharing ... More
Diagnosing Timing Error in WMAP DataSep 14 2010Mar 01 2011The Doppler dipole signal dominates the cosmic microwave background (CMB) anisotropy maps obtained by the Wilkinson Microwave Anisotropy Probe (WMAP) mission, and plays a key role throughout the data processing. Previously, we discovered a timing asynchronism ... More
The origin of the WMAP quadrupoleMar 04 2010Mar 21 2010The cosmic microwave background (CMB) temperature maps from the Wilkinson Microwave Anisotropy Probe (WMAP) are of great importance for cosmology. In previous work we had developed a pipeline for map-making independently of the WMAP team. The new maps ... More
Realtime Scheduling and Power Allocation Using Deep Neural NetworksNov 18 2018With the increasing number of base stations (BSs) and network densification in 5G, interference management using link scheduling and power control are vital for better utilization of radio resources. However, the complexity of solving link scheduling ... More
Nonelectromagnetic duality in twisted N=4 modelApr 09 1997In this paper we discuss the possible existing correlation functions in the N=4 topological model. Due to the distinguished feature that no anomaly exists in N=4 supersymmetric theories, the positive-negative ghost number balance has to be taken into ... More
Current status of Dirac-Brueckner-Hartree-Fock calculations in asymmetric nuclear matterJun 11 2008We review the current status of our microscopic calculations in asymmetric nuclear matter. Updated predictions of the equation of state are made available to potential users. We discuss the features of our EoS in relation to the predicted neutron star ... More
Study on Evolvement Complexity in an Artificial Stock MarketJun 07 2004Dec 14 2004An artificial stock market is established based on multi-agent . Each agent has a limit memory of the history of stock price, and will choose an action according to his memory and trading strategy. The trading strategy of each agent evolves ceaselessly ... More
A deep learning approach to identify local structures in atomic-resolution transmission electron microscopy imagesFeb 08 2018Recording atomic-resolution transmission electron microscopy (TEM) images is becoming increasingly routine. A new bottleneck is then analyzing this information, which often involves time-consuming manual structural identification. We have developed a ... More
Observation number correlation in WMAP dataMay 01 2009A remarkable similarity between the large-scale non-Gaussian pattern of cosmic microwave background (CMB) temperatures obtained by Wilkinson Microwave Anisotropy Probe (WMAP) mission and the distribution feature of observation numbers is noted. Motivated ... More
Evaluating Laguerre-Gaussian beams with an invariant parameterMay 27 2013We define a new parameter about Laguerre-Gaussian (LG) beams, named $Q^{l}_{p}$, which is only related to mode indices $p$ and $l$. This parameter is able to both evaluate and distinguish LG beams. The $Q^{l}_{p}$ values are first calculated theoretically ... More
Characterizing vortex beam with angular-double-slit interferenceMay 24 2013The Fraunhofer diffraction intensity distribution of Laguerre-Gaussian beam is studied in an angular-double-slit interferometer. We demonstrate that the spiral phase structure of vortex light can be clearly revealed in this interference geometry, and ... More
Probing the topological charge of a vortex beam with dynamic angular double slitsJan 24 2015When a vortex beam with the spiral phase structure passes through a dynamic angular double slits (ADS), the interference pattern changes alternatively between destructive and constructive at the angular bisector direction of the ADS due to their phase ... More
Measuring mode indices of a partially coherent vortex beam with HBT type experimentJul 31 2016It is known that the cross-correlation function (CCF) of a partially coherent vortex (PCV) beam shows a robust link with the radial and azimuthal mode indices. However, the previous proposals are difficult to measure the CCF in practical system, especially ... More
The cosmological origin of Higgs particlesMar 24 2002A proposal of the cosmological origin of Higgs particles is given. We show, that the Higgs field could be created from the vacuum quantum conformal fluctuation of Anti-de Sitter space-time, the spontaneous breaking of vacuum symmetry, and the mass of ... More
Modeling Stock Market Based on Genetic Cellular AutomataJun 07 2004An artificial stock market is established with the modeling method and ideas of cellular automata. Cells are used to represent stockholders, who have the capability of self-teaching and are affected by the investing history of the neighboring ones. The ... More
STiCMAC: A MAC Protocol for Robust Space-Time Coding in Cooperative Wireless LANsMay 19 2011Sep 21 2011Relay-assisted cooperative wireless communication has been shown to have significant performance gains over the legacy direct transmission scheme. Compared with single relay based cooperation schemes, utilizing multiple relays further improves the reliability ... More
Physical properties of the circumnuclear starburst ring in the barred Galaxy NGC 1097May 18 2011We report high resolution 12CO(J = 2-1), 13CO(J = 2-1), and 12CO(J = 3-2) imaging of the Seyfert 1/starburst ring galaxy NGC 1097 with the Submillimeter Array to study the physical and kinematic properties of the 1-kpc circumnuclear starburst ring. Individual ... More
Time-aware Collaborative Filtering with the Piecewise Decay FunctionOct 19 2010In this paper, we determine the appropriate decay function for item-based collaborative filtering (CF). Instead of intuitive deduction, we introduce the Similarity-Signal-to-Noise-Ratio (SSNR) to quantify the impacts of rated items on current recommendations. ... More
Self-organized Boolean game on networksJul 27 2005A model of Boolean game with only one free parameter $p$ that denotes the strength of herd behavior is proposed where each agent acts according to the information obtained from his neighbors in network and those in the minority are rewarded. The simulation ... More
Effective Mechanism for Social Recommendation of NewsFeb 03 2011Recommendation systems represent an important tool for news distribution on the Internet. In this work we modify a recently proposed social recommendation model in order to deal with no explicit ratings of users on news. The model consists of a network ... More
In Vivo Renal Clearance, Biodistribution, Toxicity of Gold nanoclustersSep 27 2012Gold nanoparticles have shown great prospective in cancer diagnosis and therapy, but they can not be metabolized and prefer to accumulate in liver and spleen due to their large size. The gold nanoclusters with small size can penetrate kidney tissue and ... More
Pseudoscalar Decay Constants $ f_{D} $ and $ f_{D_s} $ in Lattice QCD with Exact Chiral SymmetryJun 26 2005We determine the masses and decay constants of pseudoscalar mesons $ D $, $ D_s $, and $ K $ in quenched lattice QCD with exact chiral symmetry. For 100 gauge configurations generated with single-plaquette action at $ \beta = 6.1 $ on the $ 20^3 \times ... More
Metallicities and Physical Conditions in Star-forming Galaxies at z~1.0-1.5Jan 10 2008Apr 01 2008We present a study of the mass-metallicity (M-Z) relation and H II region physical conditions in a sample of 20 star-forming galaxies at 1.0<z<1.5 drawn from the DEEP2 Galaxy Redshift Survey. Our analysis indicates that the zero point of the M-Z relationship ... More
Enhancement of spatial resolution of ghost imaging via localizing and thresholdingMay 10 2018In ghost imaging scheme, an illuminated light is split into test and reference beams which pass through two different optical systems respectively and an image is constructed by the second-order correlation between the two light beams. Since both the ... More
Pseudoscalar Mass and Decay Constant in Lattice QCD with Exact Chiral SymmetrySep 29 2005The masses and decay constants of pseudoscalar mesons $ D $, $ D_s $, and $ K $ are determined in quenched lattice QCD with exact chiral symmetry. For 100 gauge configurations generated with single-plaquette action at $ \beta = 6.1 $ on the $ 20^3 \times ... More
Variation of polarization distribution of reflected beam caused by spin separationJul 03 2012The variation of polarization distribution of reflected beam at specular interface and far field caused by spin separation has been studied. Due to the diffraction effect, we find a distinct difference of light polarization at the two regions. The variation ... More
Induction and restriction functors for cellular categoriesJan 23 2017Jan 25 2017Cellular categories are a generalization of cellular algebras, which include a number of important categories such as (affine)Temperley-Lieb categories, Brauer diagram categories, partition categories, the categories of invariant tensors for certain quantised ... More
Continuous data assimilation for the 3D primitive equations of the oceanMay 13 2018In this article, we show that the continuous data assimilation algorithm is valid for the 3D primitive equations of the ocean. Namely, the $L^2$ norm of the assimilated solution converge to that of the reference solution at an exponential rate in time. ... More
Directional Cell Discovery in Millimeter Wave Cellular NetworksApr 20 2014Apr 21 2015The acute disparity between increasing bandwidth demand and available spectrum, has brought millimeter wave (mmW) bands to the forefront of candidate solutions for the next-generation cellular networks. Highly directional transmissions are essential for ... More
Retention Time of Peptides in Liquid Chromatography Is Well Estimated upon Deep Transfer LearningOct 31 2017A fully automatic prediction for peptide retention time (RT) in liquid chromatography (LC), termed as DeepRT, was developed using deep learning approach, an ensemble of Residual Network (ResNet) and Long Short-Term Memory (LSTM). In contrast to the traditional ... More
Linear-Optical Implementation of Perfect Discrimination between Single-bit Unitary OperationsJan 23 2008Mar 19 2008Discrimination of unitary operations is a fundamental quantum information processing task. Assisted with linear optical elements, we experimentally demonstrate perfect discrimination between single-bit unitary operations using two methods--sequential ... More
A symmetry property for q-weighted Robinson-Schensted algorithms and other branching insertion algorithmsJun 10 2013Jun 11 2013In O'Connell-Pei(2013) a q-weighted version of the Robinson-Schensted algorithm was introduced. In this paper we show that this algorithm has a symmetry property analogous to the well known symmetry property of the normal Robinson-Schensted algorithm. ... More
Normal-dispersion Microcombs Enabled by Controllable Mode InteractionsMar 20 2015We demonstrate a scheme incorporating dual coupled microresonators through which mode interactions are intentionally introduced and controlled for Kerr frequency comb (microcomb) generation in the normal dispersion region. Microcomb generation, repetition ... More
DualTable: A Hybrid Storage Model for Update Optimization in HiveApr 28 2014Dec 01 2014Hive is the most mature and prevalent data warehouse tool providing SQL-like interface in the Hadoop ecosystem. It is successfully used in many Internet companies and shows its value for big data processing in traditional industries. However, enterprise ... More
A $q$-Robinson-Schensted-Knuth Algorithm and a $q$-polymerOct 12 2016In [Matveev-Petrov 2016](arXiv:1504.00666) a $q$-deformed Robinson-Schensted-Knuth algorithm ($q$RSK) was introduced. In this article we give reformulations of this algorithm in terms of Noumi-Yamada description, growth diagrams and local moves. We show ... More
Extending two Higgs doublet models for two-loop neutrino mass generation and one-loop neutrinoless double beta decayNov 07 2016We extend some two Higgs doublet models, where the Yukawa couplings for the charged fermion mass generation only involve one Higgs doublet, by two singlet scalars respectively carrying a singly electric charge and a doubly electric charge. The doublet ... More
Size-dependent radiosensitization of PEG-coated gold nanoparticles for cancer radiation therapyOct 02 2012Gold nanoparticles have been conceived as a radiosensitizer in cancer radiation therapy, but one of the important questions for primary drug screening is what size of gold nanoparticles can optimally enhance radiation effects. Herein, we perform in vitro ... More
Plasmonic lasing of nanocavity embedding in metallic nanoantenna arrayDec 05 2014Plasmonic nanolasers have ultrahigh lasing thresholds, especially those devices for which all three dimensions are truly subwavelength. Because of a momentum mismatch between the propagating light and localized optical field of the subwavelength nanocavity, ... More
Magnetic MoS2 Interface Monolayer on CdS Nanowire by Cation ExchangeOct 01 2016MoS2 atomic layers have recently attracted much interest because of their two-dimensional structure as well as tunable optical, electrical, and mechanical properties for next generation electronic and electro-optical devices. Here we have achieved facile ... More
Relative Rips MachineDec 23 2016We study isometric actions of finitely presented groups on $\mathbb{R}$-trees. In this paper, we develop a relative version of the Rips machine to study $\textit{pairs}$ of such actions. An important example of a $\textit{pair}$ is a group action on an ... More
A highly pixelated CdZnTe detector based on \textit{Topmetal-${II}^-$} sensorNov 13 2016\textit{Topmetal-${II}^-$} is a low noise CMOS pixel direct charge sensor with a pitch of 83$\mu m$. CdZnTe is an excellent semiconductor material for radiation detection. The combination of CdZnTe and the sensor makes it possible to build a detector ... More
Dehydrogenation through the pressure-induced polymerization processes of phosphineJun 05 2017Aug 29 2017PH3 is studied to understand the superconducting transition and responsible stoichiometry under high pressure by means of Raman, IR, and x-ray diffraction (XRD) measurements, and theoretical calculations. It is found PH3 is stable up to about 8 GPa and ... More
Analytic integrability of two lopsided systemsJun 04 2015In this paper, we present two classes of lopsided systems and discuss their analytic integrability. The analytic integrable conditions are obtained by using the method of inverse integrating factor and theory of rotated vector field. For the first class ... More
Probing charged impurities in suspended graphene using Raman spectroscopyDec 22 2008Feb 19 2009Charged impurity (CI) scattering is one of the dominant factors that affect the carrier mobility in graphene. In this paper, we use Raman spectroscopy to probe the charged impurities in suspended graphene. We find that the 2D band intensity is very sensitive ... More
Fast and accurate generation method of PSF-based system matrix for PET reconstructionJul 21 2016Positional single photon incidence response (P-SPIR) theory is researched in this paper to generate more accurate PSF-contained system matrix simply and quickly. The method has been proved highly effective to improve the spatial resolution by applying ... More
DeepRT: deep learning for peptide retention time prediction in proteomicsMay 15 2017Accurate predictions of peptide retention times (RT) in liquid chromatography have many applications in mass spectrometry-based proteomics. Herein, we present DeepRT, a deep learning based software for peptide retention time prediction. DeepRT automatically ... More
A beam monitor using silicon pixel sensors for hadron therapyNov 22 2016Jan 19 2017We report the design and test results of a beam monitor developed for online monitoring in hadron therapy. The beam monitor uses eight silicon pixel sensors, \textit{Topmetal-${II}^-$}, as the anode array. \textit{Topmetal-${II}^-$} is a charge sensor ... More
Noncommutative Differential Calculus for D-brane in Non-Constant B Field BackgroundMay 19 2001Jun 05 2001In this paper we try to construct noncommutative Yang-Mills theory for generic Poisson manifolds. It turns out that the noncommutative differential calculus defined in an old work is exactly what we need. Using this calculus, we generalize results about ... More
Depletion induced like-charge attraction: Understanding from a self-consistent field model with dielectric effectJul 17 2015Mar 19 2016Electrostatic correlation and dielectric effects are of significant importance in ionic structure properties near charged surfaces. These effects can be modeled by a system of self-consistent field equations with the approximate potential of mean force ... More
Longitudinal jitter analysis of linear accelerator electron gunSep 28 2015We present measurement and analyses of longitudinal timing jitter of Beijing Electron Positron Collider (BEPCII) linear accelerator electron gun. We simulated longitudinal jitter effect of the gun using PARMELA about beam performance including beam profile, ... More
Decoherence of Topological Qubit in Linear and Circular Motions: Decoherence Impedance, Anti-Unruh and Information BackflowMar 16 2016Aug 29 2016In this paper, we consider the decoherence patterns of a topological qubit made of two Majorana zero modes in the generic linear and circular motions in the Minkowski spacetime. We show that the reduced dynamics is exact without Markov approximation. ... More
Preliminary test results of LAr prototype detectorJan 06 2016WIMPs are a well-motivated galactic dark matter candidate. Liquid argon (LAr) is an attractive target for the direct detection of WIMPs. The LAr prototype detector is designed to study the technology and property of LAr detector. The prototype detector ... More
Narrow-linewidth cooling of $^{6}$Li atoms using the 2S-3P transitionOct 25 2016We report on a narrow-linewidth cooling of $^{6}$Li atoms using the $2S_{1/2}\to 3P_{3/2}$ transition in the ultraviolet (UV) wavelength regime. By combining the traditional red magneto-optical trap (MOT) at 671 nm and the UV MOT at 323 nm, we obtain ... More
Production of large $^{41}$K Bose-Einstein condensates using D1 gray molassesAug 26 2016We use D1 gray molasses to achieve Bose-Einstein condensation of a large number of $^{41}$K atoms in an optical dipole trap. By combining a new configuration of compressed-MOT with D1 gray molasses, we obtain a cold sample of $2.4\times10^9$ atoms with ... More
Generation of Ultra-intense Gamma-ray Train by QED HarmonicsAug 25 2015When laser intensity exceeds 10^22W/cm^2, photons with energy above MeV can be generated from high-order harmonics process in the laser-plasma interaction. We find that under such laser intensity, QED effect plays a dominating role in the radiation pattern. ... More
User Selection and Power Allocation in Full Duplex Multi-Cell NetworksApr 29 2016Jun 11 2016Full duplex (FD) communications has the potential to double the capacity of a half duplex (HD) system at the link level. However, in a cellular network, FD operation is not a straightforward extension of half duplex operations. The increased interference ... More
A Beam Monitor Using Silicon Pixel Sensors for Hadron TherapyNov 22 2016We report the design and test results of a beam monitor developed for online monitoring in hadron therapy. The beam monitor uses eight silicon pixel sensors, \textit{Topmetal-${II}^-$}, as the anode array. \textit{Topmetal-${II}^-$} is a charge sensor ... More
Milky Way Supermassive Black Hole: Dynamical Feeding from the Circumnuclear EnvironmentJul 26 2012The supermassive black hole (SMBH), Sgr A*, at the Galactic Center is surrounded by a molecular circumnuclear disk (CND) lying between 1.5-4 pc radii. The irregular and clumpy structures of the CND, suggest dynamical evolution and episodic feeding of ... More
Understanding depletion induced like-charge attraction from self-consistent field modelJul 17 2015Nov 05 2016The interaction force between likely charged particles/surfaces is usually repulsive due to the Coulomb interaction. However, the counterintuitive like-charge attraction in electrolytes has been frequently observed in experiments, which has been theoretically ... More
Observation of two-species vortex lattices in a mixture of mass-imbalance Bose and Fermi superfluidsJun 06 2016The superfluid mixture of interacting Bose and Fermi species is a remarkable many-body quantum system. Dilute degenerate atomic gases, especially for two species of distinct masses, are excellent candidates for exploring fundamental features of superfluid ... More
The Processing of the Clumpy Molecular Gas in the Galactic Center and the Star-FormationFeb 05 2014Feb 07 2014We present the Green Bank 100m Telescope (GBT) mapping observations of CS 1-0, and the Submillimeter Array (SMA) 157-pointings mosaic of the 0.86 mm dust continuum emission as well as several warm and dense gas tracers, in the central ~20 pc area in Galactic ... More
ISM Processing in the Inner 20 pc in Galactic centerApr 29 2013We present the Submillimeter Array (SMA) 157-pointing mosaic in 0.86 mm dust continuum emission with 5$".1\times4"$.2 angular resolution, and the NRAO Green Bank 100m Telescope (GBT) observations of the CS/C$^{34}$S/$^{13}$CS 1-0 and SiO 1-0 emission ... More
A continuous-state nonlinear branching processSep 30 2016A continuous-state nonlinear branching process is constructed as the pathwise unique solution of a stochastic integral equation. The extinction and explosion probabilities and the mean extinction and explosion times are computed explicitly, which are ... More
A Concise Review on M5-brane in Large C-Field BackgroundDec 02 2009Jan 19 2010We give a concise review of recent developments of the M5-brane theory derived from the Bagger-Lambert model. It is a 6 dimensional supersymmetric self-dual gauge theory describing an M5-brane in a large constant $C$-field background. The non-Abelian ... More
Virasoro Algebra for Particles with Higher Derivative InteractionsAug 25 2002Jan 14 2003In this paper we show that the worldline reparametrization for particles with higher derivative interactions appears as a higher dimensional symmetry, which is generated by the truncated Virasoro algebra. We also argue that for generic nonlocal particle ... More
Fuzzy Sphere from Matrix ModelOct 19 2000Nov 02 2000Using a D0-brane as a probe, we study the spacetime geometry in the neighborhood of N D-branes in matrix theory. We find that due to fermionic zero modes, the coordinates of the probe in the transverse directions are noncommutative, and the angular part ... More
Twisted Bundle On Quantum Torus and BPS States in Matrix TheoryMar 19 1998Mar 26 1998Following the recent work of Connes, Douglas and Schwarz, we study the M(atrix) model compactified on a torus with a background of the three-form field. This model is given by a super Yang-Mills theory on a quantum torus. To consider twisted gauge field ... More
Bifurcation of ten small-amplitude limit cycles by perturbing a quadratic Hamiltonian systemNov 14 2013Nov 15 2013This paper contains two parts. In the first part, we shall show that the result given in the Zoladek's example [1], which claims the existence of 11 small-amplitude limit cycles around a singular point in a particular cubic vector filed, is not correct. ... More
On a quantum causal stochastic double product integral related to Lévy areaJun 13 2015We study the family of causal double product integrals \begin{equation*} \prod_{a < x < y < b}\left(1 + i{\lambda \over 2}(dP_x dQ_y - dQ_x dP_y) + i {\mu \over 2}(dP_x dP_y + dQ_x dQ_y)\right) \end{equation*} where $P$ and $Q$ are the mutually noncommuting ... More
Nonlinear branching processes with immigrationSep 28 2016The nonlinear branching process with immigration is constructed as the pathwise unique solution of a stochastic integral equation driven by Poisson ran- dom measures. Some criteria for the regularity, recurrence, ergodicity and strong ergodicity of the ... More
Nambu Bracket for M TheoryDec 01 2009Jan 19 2010In this article we give a concise review of recent progress in our understanding of the Lie 3-algebra and their application to the Bagger-Lambert-Gustavsson model describing multiple M2-branes in M theory.
Notes on two-parameter quantum groups, (I)Feb 11 2007Sep 15 2007A simpler definition for a class of two-parameter quantum groups associated to semisimple Lie algebras is given in terms of Euler form. Their positive parts turn out to be 2-cocycle deformations of each other under some conditions. An operator realization ... More
PET image reconstruction with system matrix containing point spread function derived from single photon incidence responseMay 04 2014Sep 11 2014In positron emission tomography (PET) imaging, statistical iterative reconstruction (IR) techniques appear particularly promising since they can provide accurate system model. The system model matrix which describes the relationship between image space ... More
Making Non-Associative Algebra AssociativeMar 05 2001Mar 06 2001Based on results about open string correlation functions, a nonassociative algebra was proposed in a recent paper for D-branes in a background with nonvanishing $H$. We show that our associative algebra obtained by quantizing the endpoints of an open ... More
The Absence of Horizon in Black-Hole FormationOct 24 2015May 31 2016With the back-reaction of Hawking radiation taken into consideration, the work of Kawai, Matsuo and Yokokura has shown that, under a few assumptions, the collapse of matter does not lead to event horizon nor apparent horizon. In this paper, we relax their ... More
Comment on Self-Consistent Model of Black Hole Formation and EvaporationMay 11 2015May 18 2015In an earlier work, Kawai et al proposed a model of black-hole formation and evaporation, in which the geometry of a collapsing shell of null dust is studied, including consistently the back reaction of its Hawking radiation. In this note, we illuminate ... More
A simple approach to describe hadron production rates in inelastic pp and p$\bar{p}$ collisionsMar 05 1997We show that the production rates of light-flavoured mesons and baryons in inelastic pp and p$\bar{p}$ collisions can be described by a simple approach used to describe data obtained in $e^{+}e^{-}$ annihilation. Based on the idea of string fragmentation, ... More
Lattices and maximum flow algorithms in planar graphsNov 09 2012We show that the left/right relation on the set of s-t-paths of a plane graph induces a so-called submodular lattice. If the embedding of the graph is s-t-planar, this lattice is even consecutive. This implies that Ford and Fulkerson's uppermost path ... More
From Dirac neutrino masses to baryonic and dark matter asymmetriesSep 20 2012Mar 26 2013We consider an SU(3)'_c\times SU(2)'_L\times U(1)'_Y dark sector, parallel to the SU(3)_c\times SU(2)_L\times U(1)_Y ordinary sector. The hypercharges, baryon numbers and lepton numbers in the dark sector are opposite to those in the ordinary sector. ... More
Significant neutrinoless double beta decay with quasi-Dirac neutrinosJan 26 2011Sep 13 2012A significant signal of neutrinoless double beta decay can be consistent with the existence of light quasi-Dirac neutrinos. To demonstrate this possibility, we consider a realistic model where the neutrino masses and the neutrinoless double beta decay ... More
Origin of matter in the universeJun 13 2007Aug 31 2007We extend the standard model with two iso-singlet color triplet scalars, one singlet real scalar and one singlet fermion. The new fields are odd under an unbroken Z_2 discrete symmetry while the standard model particles are even. The decays of the singlet ... More
Neutrinoless double beta decay in the left-right symmetric models for linear seesawDec 03 2015Sep 06 2016In a class of left-right symmetric models for linear seesaw, a neutrinoless double beta decay induced by the left- and right-handed charged currents together will only depend on the breaking details of left-right and electroweak symmetries. This neutrinoless ... More
Multi-component dark matter with magnetic moments for Fermi-LAT gamma-ray lineJan 18 2013Mar 26 2013We propose a model of multi-component dark matter with magnetic moments to explain the 130 GeV gamma-ray line hinted by the Fermi-LAT data. Specifically, we consider a U(1)_X dark sector which contains two vector-like fermions besides the related gauge ... More
Large Lepton Asymmetry for Small Baryon Asymmetry and Warm Dark MatterMay 10 2010Oct 28 2010We propose a resonant leptogenesis scenario in a U(1)_{B-L} gauge extension of the standard model to generate large lepton asymmetries for cosmological baryon asymmetry and dark matter. After B-L number is spontaneously broken, inflaton can pick up a ... More
Asymptotic Black HolesSep 19 2016Sep 24 2016Following earlier works on the KMY model of black-hole formation and evaporation, we construct the metric for a matter sphere in gravitational collapse, with the back-reaction of pre-Hawking radiation taken into consideration. The mass distribution and ... More
Regularization of Newton Constant, Trans-Planckian Dispersion Relation, and Symmetry of Particle SpectrumAug 15 2003Oct 01 2003We consider the possibility that the UV completeness of a fundamental theory is achieved by a modification of propagators at large momenta. We assume that general covariance is preserved at all energies, and focus on the coupling of a scalar field to ... More
Twisted Bundle on Noncommutative Space and U(1) InstantonMar 02 2000Mar 06 2000We study the notion of twisted bundles on noncommutative space. Due to the existence of projective operators in the algebra of functions on the noncommutative space, there are twisted bundles with non-constant dimension. The U(1) instanton solution of ... More
Riemannian Geometry on Quantum SpacesMay 17 1995Mar 08 1996An algebraic formulation of Riemannian geometry on quantum spaces is presented, where Riemannian metric, distance, Laplacian, connection, and curvature have their counterparts. This description is also extended to complex manifolds. Examples include the ... More
The Devil is in the Tails: Regression Discontinuity Design with Measurement Error in the Assignment VariableSep 06 2016Identification in a regression discontinuity (RD) research design hinges on the discontinuity in the probability of treatment when a covariate (assignment variable) exceeds a known threshold. When the assignment variable is measured with error, however, ... More
On the local well-posedness and a Prodi-Serrin type regularity criterion of the three-dimensional MHD-Boussinesq system without thermal diffusionSep 20 2016We prove a Prodi-Serrin-type global regularity condition for the three-dimensional Magnetohydrodynamic-Boussinesq system (3D MHD-Boussinesq) without thermal diffusion, in terms of only two velocity and two magnetic components. This is the first Prodi-Serrin-type ... More
The spectral sequences and parametric normal formsMar 20 2011We generalize recent developments on normal forms and the spectral sequences method to make a foundation for parametric normal forms. We further introduce a new style and costyle to obtain unique parametric normal forms. The results are applied to systems ... More