Split (1)

train · 379 rows

source stringclasses 1 value	text stringlengths 93 1.96k
arxiv	Title: The birth of string theory Abstract: In this contribution we go through the developments that in the years 1968 to 1974 led from the Veneziano model to the bosonic string.
arxiv	Title: Duality and Tameness Abstract: We prove a duality theorem for certain graded algebras and show by various examples different kinds of failure of tameness of local cohomology.
arxiv	Title: Generalized regularly discontinuous solutions of the Einstein equations Abstract: The physical consistency of the match of piecewise-$C^0$ metrics is discussed. The mathematical theory of gravitational discontinuity hypersurfaces is generalized to cover the match of regularly discontinuous metrics. The mean-valu...
arxiv	Title: A geometric realization of sl(6,C) Abstract: Given an orientable weakly self-dual manifold X of rank two, we build a geometric realization of the Lie algebra sl(6,C) as a naturally defined algebra L of endomorphisms of the space of differential forms of X. We provide an explicit description of Serre generators i...
arxiv	Title: Rigid subsets of symplectic manifolds Abstract: We show that there is an hierarchy of intersection rigidity properties of sets in a closed symplectic manifold: some sets cannot be displaced by symplectomorphisms from more sets than the others. We also find new examples of rigidity of intersections involving, in ...
arxiv	Title: Multiple Parton Scattering in Nuclei: Quark-quark Scattering Abstract: Modifications to quark and antiquark fragmentation functions due to quark-quark (antiquark) double scattering in nuclear medium are studied systematically up to order \cal{O}(\alpha_{s}^2)$ in deeply inelastic scattering (DIS) off nuclear tar...
arxiv	Title: Experimental modeling of physical laws Abstract: A physical law is represented by the probability distribution of a measured variable. The probability density is described by measured data using an estimator whose kernel is the instrument scattering function. The experimental information and data redundancy are ...
arxiv	Title: Reducing SAT to 2-SAT Abstract: Description of a polynomial time reduction of SAT to 2-SAT of polynomial size.
arxiv	Title: Half-metallic silicon nanowires Abstract: From first-principles calculations, we predict that transition metal (TM) atom doped silicon nanowires have a half-metallic ground state. They are insulators for one spin-direction, but show metallic properties for the opposite spin direction. At high coverage of TM atom...
arxiv	Title: On Equivariant Embedding of Hilbert C^* modules Abstract: We prove that an arbitrary (not necessarily countably generated) Hilbert $G$-$\cla$ module on a G-C^* algebra $\cla$ admits an equivariant embedding into a trivial $G-\cla$ module, provided G is a compact Lie group and its action on $\cla$ is ergodic.
arxiv	Title: Invariance and the twisted Chern character : a case study Abstract: We give details of the proof of the remark made in \cite{G2} that the Chern characters of the canonical generators on the K homology of the quantum group $SU_q(2)$ are not invariant under the natural $SU_q(2)$ coaction. Furthermore, the conjectu...
arxiv	Title: Placeholder Substructures III: A Bit-String-Driven ''Recipe Theory'' for Infinite-Dimensional Zero-Divisor Spaces Abstract: Zero-divisors (ZDs) derived by Cayley-Dickson Process (CDP) from N-dimensional hypercomplex numbers (N a power of 2, at least 4) can represent singularities and, as N approaches infinite,...
arxiv	Title: Langmuir blodgett assembly of densely aligned single walled carbon nanotubes from bulk materials Abstract: Single walled carbon nanotubes exhibit advanced electrical and surface properties useful for high performance nanoelectronics. Important to future manufacturing of nanotube circuits is large scale assembl...
arxiv	Title: Quantum Phase Transition in the Four-Spin Exchange Antiferromagnet Abstract: We study the S=1/2 Heisenberg antiferromagnet on a square lattice with nearest-neighbor and plaquette four-spin exchanges (introduced by A.W. Sandvik, Phys. Rev. Lett. {\bf 98}, 227202 (2007).) This model undergoes a quantum phase tra...
arxiv	Title: Smooth maps with singularities of bounded K-codimensions Abstract: We will prove the relative homotopy principle for smooth maps with singularities of a given {\cal K}-invariant class with a mild condition. We next study a filtration of the group of homotopy self-equivalences of a given manifold P by considering...
arxiv	Title: Stringy Jacobi fields in Morse theory Abstract: We consider the variation of the surface spanned by closed strings in a spacetime manifold. Using the Nambu-Goto string action, we induce the geodesic surface equation, the geodesic surface deviation equation which yields a Jacobi field, and we define the index for...
arxiv	Title: Lower ground state due to counter-rotating wave interaction in trapped ion system Abstract: We consider a single ion confined in a trap under radiation of two traveling waves of lasers. In the strong-excitation regime and without the restriction of Lamb-Dicke limit, the Hamiltonian of the system is similar to ...
arxiv	Title: Strained single-crystal Al2O3 grown layer-by-layer on Nb (110) thin films Abstract: We report on the layer-by-layer growth of single-crystal Al2O3 thin-films on Nb (110). Single-crystal Nb films are first prepared on A-plane sapphire, followed by the evaporation of Al in an O2 background. The first stages of A...
arxiv	Title: Quasi-quartet crystal electric field ground state in a tetragonal CeAg$_2$Ge$_2$ single crystal Abstract: We have successfully grown the single crystals of CeAg$_2$Ge$_2$, for the first time, by flux method and studied the anisotropic physical properties by measuring the electrical resistivity, magnetic suscep...
arxiv	Title: Strong Phase and $D^0-D^0bar$ mixing at BES-III Abstract: Most recently, both BaBar and Belle experiments found evidences of neutral $D$ mixing. In this paper, we discuss the constraints on the strong phase difference in $D^0 \to K\pi$ decay from the measurements of the mixing parameters, $y^\prime$, $y_{CP}$ an...
arxiv	Title: Meta-Stable Brane Configuration of Product Gauge Groups Abstract: Starting from the N=1 SU(N_c) x SU(N_c') gauge theory with fundamental and bifundamental flavors, we apply the Seiberg dual to the first gauge group and obtain the N=1 dual gauge theory with dual matters including the gauge singlets. By analyzing ...
arxiv	Title: Spinor dipolar Bose-Einstein condensates; Classical spin approach Abstract: Magnetic dipole-dipole interaction dominated Bose-Einstein condensates are discussed under spinful situations. We treat the spin degrees of freedom as a classical spin vector, approaching from large spin limit to obtain an effective mini...
arxiv	Title: Nonlinear Dynamics of the Phonon Stimulated Emission in Microwave Solid-State Resonator of the Nonautonomous Phaser Generator Abstract: The microwave phonon stimulated emission (SE) has been experimentally and numerically investigated in a nonautonomous microwave acoustic quantum generator, called also microwa...
arxiv	Title: Proper J-holomorphic discs in Stein domains of dimension 2 Abstract: We prove the existence of global Bishop discs in a strictly pseudoconvex Stein domain in an almost complex manifold of complex dimension 2.
arxiv	Title: Anisotropic thermo-elasticity in 2D -- Part I: A unified approach Abstract: In this note we develop tools and techniques for the treatment of anisotropic thermo-elasticity in two space dimensions. We use a diagonalisation technique to obtain properties of the characteristic roots of the full symbol of the system...
arxiv	Title: I-V characteristics of the vortex state in MgB2 thin films Abstract: The 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, ...
arxiv	Title: Magnetic Fingerprints of sub-100 nm Fe Nanodots Abstract: Sub-100 nm nanomagnets not only are technologically important, but also exhibit complex magnetization reversal behaviors as their dimensions are comparable to typical magnetic domain wall widths. Here we capture magnetic "fingerprints" of 1 billion Fe nan...
arxiv	Title: An online repository of Swift/XRT light curves of GRBs Abstract: Context. Swift data are revolutionising our understanding of Gamma Ray Bursts. Since bursts fade rapidly, it is desirable to create and disseminate accurate light curves rapidly. Aims. To provide the community with an online repository of X-ray l...
arxiv	Title: On the total disconnectedness of the quotient Aubry set Abstract: In this paper we show that the quotient Aubry set associated to certain Lagrangians is totally disconnected (i.e., every connected component consists of a single point). Moreover, we discuss the relation between this problem and a Morse-Sard type ...
arxiv	Title: New simple modular Lie superalgebras as generalized prolongs Abstract: Over algebraically closed fields of characteristic p>2, prolongations of the simple finite dimensional Lie algebras and Lie superalgebras with Cartan matrix are studied for certain simplest gradings of these algebras. Several new simple Lie s...
arxiv	Title: Vacuum Structure and Potential Abstract: Based on overall experimental observations, especially the pair processes, I developed a model structure of the vacuum along with a basic-particle formation scheme begun in 2000 (with collaborator P-I Johansson). The model consists in that the vacuum is, briefly, filled o...
arxiv	Title: Counterflow of electrons in two isolated quantum point contacts Abstract: We study the interaction between two adjacent but electrically isolated quantum point contacts (QPCs). At high enough source-drain bias on one QPC, the drive QPC, we detect a finite electric current in the second, unbiased, detector QPC. T...
arxiv	Title: PAH emission and star formation in the host of the z~2.56 Cloverleaf QSO Abstract: We report the first detection of the 6.2micron and 7.7micron infrared `PAH' emission features in the spectrum of a high redshift QSO, from the Spitzer-IRS spectrum of the Cloverleaf lensed QSO (H1413+117, z~2.56). The ratio of PAH...
arxiv	Title: Causal dissipative hydrodynamics for QGP fluid in 2+1 dimensions Abstract: In 2nd order causal dissipative theory, space-time evolution of QGP fluid is studied in 2+1 dimensions. Relaxation equations for shear stress tensors are solved simultaneously with the energy-momentum conservation equations. Comparison of...
arxiv	Title: A Single Trapped Ion as a Time-Dependent Harmonic Oscillator Abstract: We show how a single trapped ion may be used to test a variety of important physical models realized as time-dependent harmonic oscillators. The ion itself functions as its own motional detector through laser-induced electronic transitions. A...
arxiv	Title: Compounding Fields and Their Quantum Equations in the Trigintaduonion Space Abstract: The 32-dimensional compounding fields and their quantum interplays in the trigintaduonion space can be presented by analogy with octonion and sedenion electromagnetic, gravitational, strong and weak interactions. In the trigi...
arxiv	Title: Topological defects, geometric phases, and the angular momentum of light Abstract: Recent reports on the intriguing features of vector vortex bearing beams are analyzed using geometric phases in optics. It is argued that the spin redirection phase induced circular birefringence is the origin of topological phase...
arxiv	Title: Circular and non-circular nearly horizon-skimming orbits in Kerr spacetimes Abstract: We have performed a detailed analysis of orbital motion in the vicinity of a nearly extremal Kerr black hole. For very rapidly rotating black holes (spin a=J/M>0.9524M) we have found a class of very strong field eccentric orb...
arxiv	Title: The Blue Straggler Population of the Globular Cluster M5 Abstract: By combining high-resolution HST and wide-field ground based observations, in ultraviolet and optical bands, we study the Blue Stragglers Star (BSS) population of the galactic globular cluster M5 (NGC 5904) from its very central regions up to its...
arxiv	Title: Entanglement entropy of two-dimensional Anti-de Sitter black holes Abstract: Using the AdS/CFT correspondence we derive a formula for the entanglement entropy of the anti-de Sitter black hole in two spacetime dimensions. The leading term in the large black hole mass expansion of our formula reproduces exactly th...
arxiv	Title: Towards self-consistent definition of instanton liquid parameters Abstract: The possibility of self-consistent determination of instanton liquid parameters is discussed together with the definition of optimal pseudo-particle configurations and comparing the various pseudo-particle ensembles. The weakening of rep...
arxiv	Title: Some aspects of the nonperturbative renormalization of the phi^4 model Abstract: A nonperturbative renormalization of the phi^4 model is considered. First we integrate out only a single pair of conjugated modes with wave vectors +/- q. Then we are looking for the RG equation which would describe the transformati...
arxiv	Title: Instanton Liquid at Finite Temperature and Chemical Potential of Quarks Abstract: Instanton liquid in heated and strongly interacting matter is studied using the variational principle. The dependence of the instanton liquid density (gluon condensate) on the temperature and the quark chemical potential is determi...
arxiv	Title: Eternal inflation and localization on the landscape Abstract: We model the essential features of eternal inflation on the landscape of a dense discretuum of vacua by the potential $V(\phi)=V_{0}+\delta V(\phi)$, where $\|\delta V(\phi)\|\ll V_{0}$ is random. We find that the diffusion of the distribution function ...
arxiv	Title: Singularity Resolution in Isotropic Loop Quantum Cosmology: Recent Developments Abstract: Since the past Iagrg meeting in December 2004, new developments in loop quantum cosmology have taken place, especially with regards to the resolution of the Big Bang singularity in the isotropic models. The singularity re...
arxiv	Title: Vortices in Bose-Einstein Condensates: Theory Abstract: Vortices are pervasive in nature, representing the breakdown of laminar fluid flow and hence playing a key role in turbulence. The fluid rotation associated with a vortex can be parameterized by the circulation $\Gamma=\oint {\rm d}{\bf r}\cdot{\bf v}({\bf ...
arxiv	Title: A POVM view of the ensemble approach to polarization optics Abstract: Statistical ensemble formalism of Kim, Mandel and Wolf (J. Opt. Soc. Am. A 4, 433 (1987)) offers a realistic model for characterizing the effect of stochastic non-image forming optical media on the state of polarization of transmittedlight. Wi...
arxiv	Title: Reexamination of spin decoherence in semiconductor quantum dots from equation-of-motion approach Abstract: The longitudinal and transversal spin decoherence times, $T_1$ and $T_2$, in semiconductor quantum dots are investigated from equation-of-motion approach for different magnetic fields, quantum dot sizes, ...
arxiv	Title: Construction of initial data for 3+1 numerical relativity Abstract: This lecture is devoted to the problem of computing initial data for the Cauchy problem of 3+1 general relativity. The main task is to solve the constraint equations. The conformal technique, introduced by Lichnerowicz and enhanced by York, is p...
arxiv	Title: Magnetism and Thermodynamics of Spin-1/2 Heisenberg Diamond Chains in a Magnetic Field Abstract: The magnetic and thermodynamic properties of spin-1/2 Heisenberg diamond chains are investigated in three different cases: (a) J1, J2, J3>0 (frustrated); (b) J1, J3<0, J2>0 (frustrated); and (c) J1, J2>0, J3<0 (non...
arxiv	Title: Extraction of physical laws from joint experimental data Abstract: The extraction of a physical law y=yo(x) from joint experimental data about x and y is treated. The joint, the marginal and the conditional probability density functions (PDF) are expressed by given data over an estimator whose kernel is the inst...
arxiv	Title: Kinetic equation for finite systems of fermions with pairing Abstract: The solutions of the Wigner-transformed time-dependent Hartree--Fock--Bogoliubov equations are studied in the constant-$\Delta$ approximation. This approximation is known to violate particle-number conservation. As a consequence, the density ...
arxiv	Title: Reciprocal Symmetry and Classical Discrete Oscillator Incorporating Half-Integral Energy Levels Abstract: Classical oscillator differential equation is replaced by the corresponding (finite time) difference equation. The equation is, then, symmetrized so that it remains invariant under the change d going to -d...
arxiv	Title: Hadrons in Medium -- Theory confronts experiment Abstract: In this talk we briefly summarize our theoretical understanding of in-medium selfenergies of hadrons. With the special case of the $\omega$ meson we demonstrate that earlier calculations that predicted a significant lowering of the mass in medium are bas...
arxiv	Title: A computer program for fast non-LTE analysis of interstellar line spectra Abstract: The large quantity and high quality of modern radio and infrared line observations require efficient modeling techniques to infer physical and chemical parameters such as temperature, density, and molecular abundances. We prese...
arxiv	Title: Nonlinear force-free coronal magnetic field extrapolation scheme based on the direct boundary integral formulation Abstract: This paper has been withdrawn by the authors.
arxiv	Title: Alternative Approaches to the Equilibrium Properties of Hard-Sphere Liquids Abstract: An overview of some analytical approaches to the computation of the structural and thermodynamic properties of single component and multicomponent hard-sphere fluids is provided. For the structural properties, they yield a th...
arxiv	Title: Complexities of Human Promoter Sequences Abstract: By means of the diffusion entropy approach, we detect the scale-invariance characteristics embedded in the 4737 human promoter sequences. The exponent for the scale-invariance is in a wide range of $[ {0.3,0.9} ]$, which centered at $\delta_c = 0.66$. The distri...
arxiv	Title: Evidence for an excitonic insulator phase in 1T-TiSe$_{2}$ Abstract: We present a new high-resolution angle-resolved photoemission study of 1\textit{T}-TiSe$_{2}$ in both, its room-temperature, normal phase and its low-temperature, charge-density wave phase. At low temperature the photoemission spectra are stron...
arxiv	Title: Oxygen-rich droplets and the enrichment of the ISM Abstract: We argue that the discrepancies observed in HII regions between abundances derived from optical recombination lines (ORLs) and collisionally excited lines (CELs) might well be the signature of a scenario of the enrichment of the interstellar medium (IS...
arxiv	Title: Soft modes and NTE in Zn(CN)2 from Raman spectroscopy and first principles calculations Abstract: We have studied Zn(CN)2 at high pressure using Raman spectroscopy, and report Gruneisen parameters of the soft phonons. The phonon frequencies and eigen vectors obtained from ab-initio calculations are used for th...
arxiv	Title: Estimation of experimental data redundancy and related statistics Abstract: Redundancy of experimental data is the basic statistic from which the complexity of a natural phenomenon and the proper number of experiments needed for its exploration can be estimated. The redundancy is expressed by the entropy of info...
arxiv	Title: Effective potentials for quasicrystals from ab-initio data Abstract: Classical effective potentials are indispensable for any large-scale atomistic simulations, and the relevance of simulation results crucially depends on the quality of the potentials used. For complex alloys like quasicrystals, however, realist...
arxiv	Title: On smooth foliations with Morse singularities Abstract: Let $M$ be a smooth manifold and let $\F$ be a codimension one, $C^\infty$ foliation on $M$, with isolated singularities of Morse type. The study and classification of pairs $(M,\F)$ is a challenging (and difficult) problem. In this setting, a classical res...
arxiv	Title: Frobenius-Schur indicators for semisimple Lie algebras Abstract: Let g be a finite dimensional complex semisimple Lie algebra, and let V be a finite dimensional represenation of g. We give a closed formula for the mth Frobenius-Schur indicator, m>1, of V in representation-theoretic terms. We deduce that the indi...
arxiv	Title: Supersymmetry breaking metastable vacua in runaway quiver gauge theories Abstract: In this paper we consider quiver gauge theories with fractional branes whose infrared dynamics removes the classical supersymmetric vacua (DSB branes). We show that addition of flavors to these theories (via additional non-compact...
arxiv	Title: Low Energy Aspects of Heavy Meson Decays Abstract: I discuss low energy aspects of heavy meson decays, where there is at least one heavy meson in the final state. Examples are $B -\bar{B}$ mixing, $B \to D \bar{D}$, $B \to D \eta'$, and $B \to D \gamma$. %and $B \to D W $ (Isgur-Wise function). The analysis is p...
arxiv	Title: Radiative losses and cut-offs of energetic particles at relativistic shocks Abstract: We investigate the acceleration and simultaneous radiative losses of electrons in the vicinity of relativistic shocks. Particles undergo pitch angle diffusion, gaining energy as they cross the shock by the Fermi mechanism and...
arxiv	Title: Very strong and slowly varying magnetic fields as source of axions Abstract: The investigation on the production of particles in slowly varying but extremely intense magnetic field in extended to the case of axions. The motivation is, as for some previously considered cases, the possibility that such kind of mag...
arxiv	Title: Symmetry disquisition on the TiOX phase diagram Abstract: The sequence of phase transitions and the symmetry of in particular the low temperature incommensurate and spin-Peierls phases of the quasi one-dimensional inorganic spin-Peierls system TiOX (TiOBr and TiOCl) have been studied using inelastic light scatte...
arxiv	Title: Discovery of a point-like very-high-energy gamma-ray source in Monoceros Abstract: The complex Monoceros Loop SNR/Rosette Nebula region contains several potential sources of very-high-energy (VHE) gamma-ray emission and two as yet unidentified high-energy EGRET sources. Sensitive VHE observations are required to...
arxiv	Title: Thermal entanglement of qubit pairs on the Shastry-Sutherland lattice Abstract: We show that temperature and magnetic field properties of the entanglement between spins on the two-dimensional Shastry-Sutherland lattice can be qualitatively described by analytical results for a qubit tetramer. Exact diagonalizati...
arxiv	Title: Bonding of H in O vacancies of ZnO Abstract: We investigate the bonding of H in O vacancies of ZnO using density functional calculations. We find that H is anionic and does not form multicenter bonds with Zn in this compound.
arxiv	Title: Reparametrization Invariance, the controversial extraction of $\alpha$ from $B\to\pi\pi$ and New Physics Abstract: The extraction of the weak phase $\alpha$ from $B\to\pi\pi$ decays has been controversial from a statistical point of view, as the frequentist vs. bayesian confrontation shows. We analyse several ...
arxiv	Title: Solar System Constraints on Gauss-Bonnet Mediated Dark Energy Abstract: Although the Gauss-Bonnet term is a topological invariant for general relativity, it couples naturally to a quintessence scalar field, modifying gravity at solar system scales. We determine the solar system constraints due to this term by ev...
arxiv	Title: Switching mechanism of photochromic diarylethene derivatives molecular junctions Abstract: The electronic transport properties and switching mechanism of single photochromic diarylethene derivatives sandwiched between two gold surfaces with closed and open configurations are investigated by a fully self-consis...
arxiv	Title: Robust manipulation of electron spin coherence in an ensemble of singly charged quantum dots Abstract: Using the recently reported mode locking effect we demonstrate a highly robust control of electron spin coherence in an ensemble of (In,Ga)As quantum dots during the single spin coherence time. The spin prece...
arxiv	Title: Equation of state for dense hydrogen and plasma phase transition Abstract: We calculate the equation of state of dense hydrogen within the chemical picture. Fluid variational theory is generalized for a multi-component system of molecules, atoms, electrons, and protons. Chemical equilibrium is supposed for the r...
arxiv	Title: Experimental nonclassicality of single-photon-added thermal light states Abstract: We report the experimental realization and tomographic analysis of novel quantum light states obtained by exciting a classical thermal field by a single photon. Such states, although completely incoherent, possess a tunable degree...
arxiv	Title: Neutron Skin and Giant Resonances in Nuclei Abstract: Some aspects, both experimental and theoretical, of extracting the neutron skin $\Delta R$ from properties of isovector giant resonances are discussed. Existing proposals are critically reviewed. The method relying on the energy difference between the GTR and...
arxiv	Title: Genetic Optimization of Photonic Bandgap Structures Abstract: We investigate the use of a Genetic Algorithm (GA) to design a set of photonic crystals (PCs) in one and two dimensions. Our flexible design methodology allows us to optimize PC structures which are optimized for specific objectives. In this paper, we...
arxiv	Title: Huge magneto-crystalline anisotropy of x-ray linear dichroism observed on Co/FeMn bilayers Abstract: We present an x-ray spectromicroscopic investigation of single-crystalline magnetic FeMn/Co bilayers on Cu(001), using X-ray magnetic circular (XMCD) and linear (XMLD) dichroism at the Co and Fe L3 absorption e...
arxiv	Title: Temperature Dependence of the Tensile Properties of Single Walled Carbon Nanotubes: O(N) Tight Binding MD Simulation Abstract: This paper examines the effect of temperature on the structural stability and mechanical properties of 20 layered (10,10) single walled carbon nanotubes (SWCNTs) under tensile loading ...
arxiv	Title: Gamma-ray emitting AGN and GLAST Abstract: I describe the different classes of Active Galactic Nuclei (AGN) and the basic tenets of unified schemes. I then review the properties of the extragalactic sources detected in the GeV and TeV bands, showing that the vast majority of them belong to the very rare blazar c...
arxiv	Title: Potfit: effective potentials from ab-initio data Abstract: We present a program called potfit which generates an effective atomic interaction potential by matching it to a set of reference data computed in first-principles calculations. It thus allows to perform large-scale atomistic simulations of materials wit...
arxiv	Title: Dark energy and neutrino model in SUSY -- Remarks on active and sterile neutrinos mixing -- Abstract: We consider a Mass Varying Neutrinos (MaVaNs) model in supersymmetric theory. The model includes effects of supersymmetry breaking transmitted by the gravitational interaction from the hidden sector, in which ...
arxiv	Title: The transverse proximity effect in spectral hardness on the line of sight towards HE 2347-4342 Abstract: We report the discovery of 14 quasars in the vicinity of HE2347-4342, one of the two quasars whose intergalactic HeII forest has been resolved with FUSE. By analysing the HI and the HeII opacity variations ...
arxiv	Title: Biased random walks on combs Abstract: We develop rigorous, analytic techniques to study the behaviour of biased random walks on combs. This enables us to calculate exactly the spectral dimension of random comb ensembles for any bias scenario in the teeth or spine. Two specific examples of random comb ensembles ...
arxiv	Title: Monoid generalizations of the Richard Thompson groups Abstract: The groups G_{k,1} of Richard Thompson and Graham Higman can be generalized in a natural way to monoids, that we call M_{k,1}, and to inverse monoids, called Inv_{k,1}; this is done by simply generalizing bijections to partial functions or partial i...
arxiv	Title: The Reliability on the Direction of the Incident Neutrino for the Fully Contained Events and Partially Contained Events due to QEL in the Super-Kamiokande Abstract: In the SK analysis of the neutrino events for [Fully Contained Events] and [Partially Contained Events] on their zenith angle distribution, it i...
arxiv	Title: Intricate Knots in Proteins: Function and Evolution Abstract: A number of recently discovered protein structures incorporate a rather unexpected structural feature: a knot in the polypeptide backbone. These knots are extremely rare, but their occurrence is likely connected to protein function in as yet unexplore...
arxiv	Title: Star Formation in Galaxies with Large Lower Surface Brightness Disks Abstract: We present B, R, and Halpha imaging data of 19 large disk galaxies whose properties are intermediate between classical low surface brightness galaxies and ordinary high surface brightness galaxies. We use data taken from the Lowell 1....
arxiv	Title: Domain Wall Dynamics near a Quantum Critical Point Abstract: We study the real-time domain-wall dynamics near a quantum critical point of the one-dimensional anisotropic ferromagnetic spin 1/2 chain. By numerical simulation, we find the domain wall is dynamically stable in the Heisenberg-Ising model. Near the qu...
arxiv	Title: Quantum mechanical approach to decoherence and relaxation generated by fluctuating environment Abstract: We consider an electrostatic qubit, interacting with a fluctuating charge of single electron transistor (SET) in the framework of exactly solvable model. The SET plays a role of the fluctuating environment ...
arxiv	Title: Group-theoretical properties of nilpotent modular categories Abstract: We characterize a natural class of modular categories of prime power Frobenius-Perron dimension as representation categories of twisted doubles of finite p-groups. We also show that a nilpotent braided fusion category C admits an analogue of ...
arxiv	Title: Remarks on N_c dependence of decays of exotic baryons Abstract: We calculate the N_c dependence of the decay widths of exotic eikosiheptaplet within the framework of Chral Quark Soliton Model. We also discuss generalizations of regular baryon representations for arbitrary N_c.
arxiv	Title: Analysis of random Boolean networks using the average sensitivity Abstract: In this work we consider random Boolean networks that provide a general model for genetic regulatory networks. We extend the analysis of James Lynch who was able to proof Kauffman's conjecture that in the ordered phase of random networks...
arxiv	Title: Theory of polariton mediated Raman scattering in microcavities Abstract: We calculate the intensity of the polariton mediated inelastic light scattering in semiconductor microcavities. We treat the exciton-photon coupling nonperturbatively and incorporate lifetime effects in both excitons and photons, and a coup...
arxiv	Title: Decomposition numbers for finite Coxeter groups and generalised non-crossing partitions Abstract: Given a finite irreducible Coxeter group $W$, a positive integer $d$, and types $T_1,T_2,...,T_d$ (in the sense of the classification of finite Coxeter groups), we compute the number of decompositions $c=\si_1\si_...
arxiv	Title: Electromagnetic polarizabilities and the excited states of the nucleon Abstract: The electromagnetic polarizabilities of the nucleon are shown to be essentially composed of the nonresonant $\alpha_p(E_{0+})=+3.2$, $\alpha_n(E_{0+})=+4.1$,the $t$-channel $\alpha^t_{p,n}=-\beta^t_{p,n}=+7.6$ and the resonant $\bet...

Subsets and Splits

No community queries yet

The top public SQL queries from the community will appear here once available.