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1312.5184	i	the lie co - algebra @xmath0 with coordinate functions @xmath1 has the lie poisson bracket @xmath2 for a given function @xmath3 the system of equations written as @xmath4 is called euler equations on @xmath0 with the hamilton function @xmath5 @xcite . suppose we have a rigid body rotating about a fixed point @xmath6 a...	we consider an example of a system with two degrees of freedom admitting separation of variables but having a subset of codimension 1 on which the 2-form defining the symplectic structure degenerates . new types of non - orientable 3-atoms are found . _ keywords _ : phase topology , separated variables , kowalevski ...	we consider an example of a system with two degrees of freedom admitting separation of variables but having a subset of codimension 1 on which the 2-form defining the symplectic structure degenerates . we show how to use separation of variables to calculate the exact topological invariant of non - degenerate singularit...
0901.1183	i	conductance quantization in a quantum point contact ( qpc ) , first observed in 1988@xcite , constitutes a classic textbook effect of mesoscopic physics . on top of the integer conductance plateaus @xmath0 ( where @xmath1 ) observed as a function of gate voltage @xmath2 , many experiments have found a temperature - dep...	we consider electron - electron interaction effects in quantum point contacts on the first quantization plateau , taking into account all scattering processes . we compute the low - temperature linear and nonlinear conductance , shot noise , and thermopower , by perturbation theory and a self - consistent nonperturbati...	we consider electron - electron interaction effects in quantum point contacts on the first quantization plateau , taking into account all scattering processes . we compute the low - temperature linear and nonlinear conductance , shot noise , and thermopower , by perturbation theory and a self - consistent nonperturbati...
1607.01764	i	quantum systems can ` tunnel ' through barriers , a wave - like behaviour that is a prototypical of non - classical behaviour . tunnelling plays a crucial role in a range of systems , including the theory of radioactivity , in which tunnelling is used to explain how radioactivity emerges from a nucleus despite the surr...	we consider in what sense quantum tunnelling is associated with non - classical probabilistic behaviour . we use the wigner function quasi - probability description of quantum states . we prove that this can only happen if either the wigner function is negative and/or a certain measurement operator which we call the tu...	we consider in what sense quantum tunnelling is associated with non - classical probabilistic behaviour . we use the wigner function quasi - probability description of quantum states . we give a definition of tunnelling that allows us to say whether in a given scenario there is tunnelling or not . we prove that this ca...
1604.07169	i	_ probabilistic programs . _ classic imperative programs extended with _ random - value generators _ gives rise to probabilistic programs . probabilistic programs provide the appropriate framework to model applications ranging from randomized algorithms @xcite , to stochastic network protocols @xcite , to robot plann...	we consider nondeterministic probabilistic programs with the most basic liveness property of termination . we present efficient methods for termination analysis of nondeterministic probabilistic programs with polynomial guards and assignments . our approach is through synthesis of polynomial ranking supermartingales , ...	we consider nondeterministic probabilistic programs with the most basic liveness property of termination . we present efficient methods for termination analysis of nondeterministic probabilistic programs with polynomial guards and assignments . our approach is through synthesis of polynomial ranking supermartingales , ...
1406.0969	i	in this paper we are interested in the polynomials @xmath0 that are orthogonal with respect to the weight function @xmath1 on @xmath2 , where @xmath1 is the bessel function of order @xmath8 . the bessel function is oscillatory with an amplitude that decays like @xmath9 as @xmath10 , and therefore the moments @xmath11 d...	we consider polynomials orthogonal with respect to the weight on , where is the bessel function of order . asheim and huybrechs considered these polynomials in connection with complex gaussian quadrature for oscillatory integrals . they observed that the zeros are complex and accumulate as near the vertical line . our ...	we consider polynomials orthogonal with respect to the weight on , where is the bessel function of order . asheim and huybrechs considered these polynomials in connection with complex gaussian quadrature for oscillatory integrals . they observed that the zeros are complex and accumulate as near the vertical line . we p...
1002.1404	i	in quantum transport theory , a nanosystem inside which the electrons do not interact has a zero temperature conductance which is given ( in units of the conductance quantum @xmath19 for spin polarized electrons , @xmath20 with spin degeneracy ) by @xmath21 where @xmath22 is the probability for an electron at the fermi...	we consider quantum transport of spinless fermions in a 1d lattice embedding an interacting region ( two sites with inter - site repulsion and inter - site hopping , coupled to leads by hopping terms ) . this universality characterizes the non - interacting regime where , the perturbative regime ( ) where can be obtain...	we consider quantum transport of spinless fermions in a 1d lattice embedding an interacting region ( two sites with inter - site repulsion and inter - site hopping , coupled to leads by hopping terms ) . using the numerical renormalization group for the particle - hole symmetric case , we study the quantum conductance ...
1503.04314	i	the hamiltonian @xmath0 of a physical system represents its energy , which is a real observable . it is therefore required that the expectation values of the quantum operator @xmath0 be real @xcite . this can be guaranteed by imposing that @xmath0 be hermitian , @xmath1 , as it is known that the spectrum of a hermitian...	we consider the class of non - hermitian operators represented by infinite tridiagonal matrices , selfadjoint in an indefinite inner product space with one negative square . we approximate them with their finite truncations . both infinite and truncated matrices have eigenvalues of nonpositive type : either a single on...	we consider the class of non - hermitian operators represented by infinite tridiagonal matrices , selfadjoint in an indefinite inner product space with one negative square . we approximate them with their finite truncations . both infinite and truncated matrices have eigenvalues of nonpositive type : either a single on...
1510.05909	i	ever since the concept of topological order in condensed matter systems picked up momentum during the last decade,@xcite there has been the question as to which kind of perturbations can cause topological phase transitions . in this paper , we investigate the possibility to utilize inhomogeneous perturbations , like th...	we start by identifying the general conditions under which the eigenenergies of an arbitrary hamiltonian belonging to one of the altland - zirnbauer symmetry classes undergo a robust zero energy crossing as a function of an external parameter which can be , for example , the impurity strength . we use the generalized r...	we consider the effects of impurities on topological insulators and superconductors . we start by identifying the general conditions under which the eigenenergies of an arbitrary hamiltonian belonging to one of the altland - zirnbauer symmetry classes undergo a robust zero energy crossing as a function of an external p...
1510.05909	i	in summary , we have identified the general conditions under which the eigenenergies of the hamiltonian undergo a robust zero - energy crossing as a function of external parameters in different altland - zirnbauer symmetry classes . we defined @xmath8 as a generalized root of @xmath1 and used it to predict or to rule o...	we define a generalized root of , and use it to predict or rule out robust zero - energy crossings in all symmetry classes . we complement this result with an analysis based on almost degenerate perturbation theory , which allows a derivation of the asymptotic low - energy behavior of the ensemble averaged density of s...	we consider the effects of impurities on topological insulators and superconductors . we start by identifying the general conditions under which the eigenenergies of an arbitrary hamiltonian belonging to one of the altland - zirnbauer symmetry classes undergo a robust zero energy crossing as a function of an external p...
astro-ph0403200	i	since @xcite , following early proposals by @xcite and @xcite , suggested that strange quark matter , consisting of @xmath0- , @xmath1- and @xmath2-quarks is energetically the most favorable state of the matter , the problem of existence of strange quark stars has been intensively investigated in the physical and astro...	the dynamics of the nucleation essentially depends on the physical properties of the medium it takes place . the conditions for quark bubble formation are analyzed within the frameworks of both dissipative and non - dissipative ( with zero bulk and shear viscosity coefficients ) approaches . we analyze the first order ...	we consider the general conditions of quark droplets formation in high density neutron matter . the growth of the quark bubble ( assumed to contain a sufficiently large number of particles ) can be described by means of a fokker - planck equation . the dynamics of the nucleation essentially depends on the physical prop...
1512.00681	i	the solution of the time - dependent schrdinger equation ( tdse ) that describes the interaction of an intense electromagnetic pulse with an atom or a molecule is a very challenging problem from the numerical point of view . this is particularly true in the long wavelength limit where the numerical calculations become ...	we consider the interaction of hydrogen - like atoms with a strong laser field and show that the strong field approximation and all its variants may be grouped into a set of families of approximation schemes . furthermore , this new formulation of the strong field approximations allows us to gain deeper insight into th...	we consider the interaction of hydrogen - like atoms with a strong laser field and show that the strong field approximation and all its variants may be grouped into a set of families of approximation schemes . this is done by introducing an ansatz describing the electron wave packet as the sum of the initial state wave...
1512.00681	c	in this contribution , we showed that the various treatments based on the strong field approximation may be grouped into a set of families of approximation schemes . we introduced different ansatzes that describe the electron wave packet as the sum of the initial state wave function multiplied by a phase factor and a f...	this is done by introducing an ansatz describing the electron wave packet as the sum of the initial state wave function times a phase factor and a function which is the perturbative solution in the coulomb potential of an inhomogeneous time - dependent schrdinger equation . it is the phase factor that characterizes a g...	we consider the interaction of hydrogen - like atoms with a strong laser field and show that the strong field approximation and all its variants may be grouped into a set of families of approximation schemes . this is done by introducing an ansatz describing the electron wave packet as the sum of the initial state wave...
1407.5369	i	in a seminal work , haldane demonstrated that a magnetic field is not required to induce integer quantum hall states @xcite . adding a complex hopping to the tight - binding hamiltonian on the honeycomb lattice opens a gap at the dirac points of the electron band structure . this gap leads to a topologically nontrivia...	these singularites include dirac points , quadratic fermi points in contact with a flat band , and van hove saddle points . by combining a controlled analytical approach with large - scale numerical simulations , in particular , some of these magnetic orderings produce a spontaneous quantum anomalous hall state .	we consider the kondo - lattice model on the kagome lattice and study its weak - coupling instabilities at band filling fractions for which the fermi surface has singularities . these singularites include dirac points , quadratic fermi points in contact with a flat band , and van hove saddle points . by combining a con...
1604.06430	c	we explore the low scale implications in the @xmath0 extended mssm ( umssm ) . we restrict the parameter space such that the lightest supersymmetric particle ( lsp ) is always the lightest neutralino . in addition , we impose quasi yukawa unification ( qyu ) at the grand unification scale ( @xmath1 ) . the fundamental ...	we consider the low scale implications in the extended mssm ( umssm ) . we restrict the parameter space such that the lightest supersymmetric particle ( lsp ) is always the lightest neutralino . in addition , we impose quasi yukawa unification ( qyu ) at the grand unification scale ( ) . qyu strictly requires the ratio...	we consider the low scale implications in the extended mssm ( umssm ) . we restrict the parameter space such that the lightest supersymmetric particle ( lsp ) is always the lightest neutralino . in addition , we impose quasi yukawa unification ( qyu ) at the grand unification scale ( ) . qyu strictly requires the ratio...
cs0605041	i	we consider the basic multiple - access communication problem in a distributed setting . in gallager s survey paper @xcite , it is pointed out that the multiple - access problem has been studied from a number of different perspectives , each having its own advantages and shortcomings . in the data networking community ...	we consider the multiple - access communication problem in a distributed setting for both the additive white gaussian noise channel and the discrete memoryless channel . we propose a scheme called distributed rate splitting to achieve the optimal rates allowed by information theory in a distributed manner . in this sch...	we consider the multiple - access communication problem in a distributed setting for both the additive white gaussian noise channel and the discrete memoryless channel . we propose a scheme called distributed rate splitting to achieve the optimal rates allowed by information theory in a distributed manner . in this sch...
1103.1489	r	we start with some preliminary definitions and facts . for any lebesgue integrable function @xmath32 the fourier transform @xmath33 $ ] of @xmath34 is defined as @xmath33(t ) = \int_{\mathbb{r}}h(x)e^{-itx}\,dx$ ] , @xmath35 and we use the natural extension of @xmath36 to @xmath37 . we further denote by @xmath38 the in...	we then derive lower bounds for the minimax sup - norm risk over besov balls in this estimation problem and show that wavelet deconvolution density estimators attain these bounds . we further show that linear estimators adapt to the unknown smoothness of if the fourier transform of decays exponentially and that a corre...	we consider the statistical deconvolution problem where one observes replications from the model , where is the unobserved random signal of interest and is an independent random error with distribution . under weak assumptions on the decay of the fourier transform of we derive upper bounds for the finite - sample sup ...
1508.01193	i	the geometrization of duality groups has been the source of many insights both in string and field theories . perhaps the simplest example is that of montonen - olive duality in four - dimensional @xmath6 sym , where the discrete @xmath7 group acting on the complexified coupling @xmath8 is interpreted as the modular gr...	we construct a class of codimension-2 solutions in supergravity that realize t - folds with arbitrary monodromy and we develop a geometric point of view in which the monodromy is identified with a product of dehn twists of an auxiliary surface fibered on a base . these defects , that we call t - fects , are identified ...	we construct a class of codimension-2 solutions in supergravity that realize t - folds with arbitrary monodromy and we develop a geometric point of view in which the monodromy is identified with a product of dehn twists of an auxiliary surface fibered on a base . these defects , that we call t - fects , are identified ...
math0309049	i	since rubinstein s announcement of an algorithm to recognize the 3-sphere in 1993 @xcite , almost normal surfaces , the main technical innovation of that work , have received wide attention . in 1994 thompson @xcite reworked rubinstein s proof of the existence of an almost normal 2-sphere in @xmath7 using gabai s langu...	our main result is the following : suppose ( or ) is an irreducible submanifold of a triangulated 3-manifold , bounded by a normal or almost normal surface , and containing at most one maximal normal 2-sphere . if is a strongly irreducible hst splitting of then we may isotope it so that for each even value of the surfa...	we define a heegaard - scharlemann - thompson ( hst ) splitting of a 3-manifold to be a sequence of pairwise - disjoint , embedded surfaces , , such that for each odd value of , is a heegaard splitting of the submanifold of cobounded by and . our main result is the following : suppose ( or ) is an irreducible submanifo...
1411.7807	i	lagrangian floer homology for open subsets in cotangent bundles was introduced by kasturirangan and oh in @xcite as a part of a project of `` quantization of eilenberg steenrod axioms '' ( see @xcite ) . the construction goes as follows . let @xmath1 be an open subset of a compact smooth manifold @xmath3 , with a sm...	we define and investigate spectral invariants for floer homology of an open subset in , defined by kasturirangan and oh as a direct limit of floer homologies of approximations . we define a module structure product on and prove the triangle inequality for invariants with respect to this product . we also prove the cont...	we define and investigate spectral invariants for floer homology of an open subset in , defined by kasturirangan and oh as a direct limit of floer homologies of approximations . we define a module structure product on and prove the triangle inequality for invariants with respect to this product . we also prove the cont...
0708.2533	i	in special and general relativity the spin of a gyroscope is represented by a four - vector @xmath0 . assuming that we move the gyroscope without applying any torque to it ( in a system comoving with the gyroscope ) , the spin vector will obey the fermi transport equation @xmath1 here @xmath2 is the four - velocity of ...	starting from the fermi transport equation for the standard spin vector we derive a corresponding transport equation for the stopped spin vector . employing a spacetime transport equation for a vector along a worldline , corresponding to spatial parallel transport with respect to the congruence , we can write down a pr...	we derive an effectively three - dimensional relativistic spin precession formalism . the formalism is applicable to any spacetime where an arbitrary timelike reference congruence of worldlines is specified . we employ what we call a _ stopped _ spin vector which is the spin vector that we would get if we momentarily m...
math0603410	i	the aim of this paper is to explore the connections between the problem of counting the number of partial matchings in graphs and positive hyperbolic polynomials , and ryser - like formulas for partial matchings . given a graph @xmath1 on @xmath2 vertices , i.e. @xmath3 , we want to compute the number of @xmath4-matchi...	we derive here the friedland - tverberg inequality for positive hyperbolic polynomials . this inequality is applied to give lower bounds for the number of matchings in-regular bipartite graphs . it is shown that some of these bounds are asymptotically sharp . we improve the known lower bound for the three dimensional m...	we derive here the friedland - tverberg inequality for positive hyperbolic polynomials . this inequality is applied to give lower bounds for the number of matchings in-regular bipartite graphs . it is shown that some of these bounds are asymptotically sharp . we improve the known lower bound for the three dimensional m...
astro-ph0202402	r	as noted in 1 , oblique shocks are likely to play a major role in the understanding of evolving parsec - scale jets , and in the detailed morphology of kiloparsec - scale flows such as m 87 . while models based on transverse propagating shocks have been extremely successful in explaining both the radio polarization a...	we find that even quite fast jets ( ) can be significantly influenced by impinging on an oblique density gradient , exhibiting a rotation of the mach disk in the jet s head . the flow is bent via a potentially strong , oblique internal shock that arises due to asymmetric perturbation of the flow by its cocoon . in extr...	we describe a new numerical 3d relativistic hydrodynamical code and present the results of three validation tests . a comparison of an axisymmetric jet simulation using the 3d code , with corresponding results from an earlier 2d code , reveal that a ) the enforcement of axisymmetry in the 2d case had no significant inf...
cond-mat9703179	c	we have discussed a number of recently developed cluster algorithms for the simulation of classical spin systems , including : the wolff algorithm , which flips a single cluster of spins at each update step and almost completely eliminates critical slowing down from the simulation of the ising model ; the swendsen - wa...	we describe a number of recently developed cluster - flipping algorithms for the efficient simulation of classical spin models near their critical temperature . these include the algorithms of wolff , swendsen and wang , and niedermeyer , as well as the limited cluster algorithm , the multigrid methods of kandel and co...	we describe a number of recently developed cluster - flipping algorithms for the efficient simulation of classical spin models near their critical temperature . these include the algorithms of wolff , swendsen and wang , and niedermeyer , as well as the limited cluster algorithm , the multigrid methods of kandel and co...
astro-ph9802356	c	we have performed a radial velocity survey of a total of 153 field wds and sdbs , most of which were not previously known to be binary . in the combined sample , we have discovered 18 new dd candidates with wd or sdb primaries , and 1 new confirmed wd+ms pair . among the 7 sdb variables , we have obtained orbital solut...	we describe radial velocity observations of a large sample of apparently single white dwarfs ( wds ) , obtained in a long - term effort to discover close , double - degenerate ( dd ) pairs which might comprise viable type ia supernova ( ) progenitors . follow - up observations are in progress to solve for the orbital p...	we describe radial velocity observations of a large sample of apparently single white dwarfs ( wds ) , obtained in a long - term effort to discover close , double - degenerate ( dd ) pairs which might comprise viable type ia supernova ( ) progenitors . we augment the wd sample with a previously observed sample of appar...
1002.3366	i	one of the great hopes for current and future particle colliders is that they will be able to produce dark matter . in this study , we determine the prospects for finding dark matter through the production of exotic 4th generation quarks @xmath0 that decay through @xmath1 , where @xmath2 is dark matter . current direct...	we determine the prospects for finding dark matter at the tevatron and lhc through the production of exotic 4th generation quarks that decay through , where is dark matter . the resulting signal of has not previously been considered in searches for 4th generation quarks , but there are both general and specific dark ma...	we determine the prospects for finding dark matter at the tevatron and lhc through the production of exotic 4th generation quarks that decay through , where is dark matter . the resulting signal of has not previously been considered in searches for 4th generation quarks , but there are both general and specific dark ma...
1505.06535	i	electron - transport calculations are important tools to investigate and develop materials for new electronic devices . recently , to obtain more practical knowledge on electron - transport properties of nanoscale structures , long - range and large - scale transport simulations have attracted much interest . however ,...	we develop a first - principles electron - transport simulator based on the lippmann schwinger ( ls ) equation within the framework of the real - space finite - difference scheme . in our fully real - space based ls ( grid ls ) method , the ratio expression technique for the scattering wave functions and the green s f...	we develop a first - principles electron - transport simulator based on the lippmann schwinger ( ls ) equation within the framework of the real - space finite - difference scheme . in our fully real - space based ls ( grid ls ) method , the ratio expression technique for the scattering wave functions and the green s f...
hep-th9502003	c	in this paper we have emphasised that the quantum fluctuations of the goldstone bosons have some drastic effects which are not encountered either in a tree level or loopwise analysis of the linear or the non - linear @xmath3- models.nevertheless,the leading infrared behaviour of the correlation functions again become i...	renormalization group flows , ii ) . schwinger - dyson equations.we also obtain an explicit form for the generating functional of one - particle irreducible vertices of the o(n ) ( non)linearmodels in the leading approximation.we show that this incorporates all infrared behaviour correctly both in linear and non - line...	we develop various complementary concepts and techniques for handling quantum fluctuations of goldstone bosons.we emphasise that one of the consequences of the masslessness of goldstone bosons is that the longitudinal fluctuations also have a diverging susceptibility characterised by an anomalous dimension in space - t...
1411.2607	i	over the recent decades , matrix product states ( mps ) @xcite and related numerical techniques have become the standard framework for simulating low energy states of local hamiltonians in 1d . mps with finite bond dimension provide an exact representation of the ground state only for a certain well - designed class of...	we discuss how to analytically obtain an essentially infinite matrix product state ( mps ) representation of the ground state of the xy model . on the one hand this allows to illustrate how the ornstein - zernike form of the correlation function emerges in the exact case using standard mps language . this provides a ...	we discuss how to analytically obtain an essentially infinite matrix product state ( mps ) representation of the ground state of the xy model . on the one hand this allows to illustrate how the ornstein - zernike form of the correlation function emerges in the exact case using standard mps language . on the other han...
1001.5071	i	much experimental progress has recently been achieved in the area of ultra - cold atoms . it is now possible @xcite to make systems of atoms confined in optical lattices formed by laser beams and at the same time control the strength of the two - body interaction with magnetic fields . the atoms are cooled down to extr...	we discuss the problem of two particles interacting via short - range interactions within a harmonic - oscillator trap . the interactions are organized according to their number of derivatives and defined in truncated model spaces made from a bound - state basis . we show explicitly that next - to - lo and next - to - ...	we discuss the problem of two particles interacting via short - range interactions within a harmonic - oscillator trap . the interactions are organized according to their number of derivatives and defined in truncated model spaces made from a bound - state basis . leading - order ( lo ) interactions are iterated to all...
1111.4049	c	the existence of traversable wormholes in the context of general relativity relies on the presence of some form of exotic matter . however , in the framework of a string - inspired generalized theory of gravity , the situation may be completely different . here we have investigated wormhole solutions in egbd theory , w...	these wormholes do not need any form of exotic matter for their existence . a subset of these wormholes is shown to be linearly stable with respect to radial perturbations . we perform a comprehensive study of their domain of existence , and derive a generalised smarr relation for these wormholes .	we discuss the properties of lorentzian wormholes in dilatonic einstein - gauss - bonnet theory in four spacetime dimensions . these wormholes do not need any form of exotic matter for their existence . a subset of these wormholes is shown to be linearly stable with respect to radial perturbations . we perform a compre...
1105.5113	i	the origin and chemical composition of uhe crs ( @xmath5 ev ) is a long - standing enigma in cr physics @xcite . the spectrum at these energies is expected to be dominated by extragalactic sources that have not yet been unambiguously identified . the average mass number of the composition can be inferred directly fro...	we discuss the prospects of detecting the sources of ultra - high energy ( uhe ) cosmic ray ( cr ) nuclei via their emission of cosmogenic-rays in the gev to tev energy range . these-rays result from electromagnetic cascades initiated by high energy photons , electrons and positrons that are emitted by crs during their...	we discuss the prospects of detecting the sources of ultra - high energy ( uhe ) cosmic ray ( cr ) nuclei via their emission of cosmogenic-rays in the gev to tev energy range . these-rays result from electromagnetic cascades initiated by high energy photons , electrons and positrons that are emitted by crs during their...
1312.2687	i	gaussian process models are widely used in spatial statistics and machine learning . in most applications , the covariance structure of the process is at least partially unknown and must be estimated from the available data . likelihood - based methods , including bayesian methods , are natural choices for carrying out...	we discuss a modification of the stochastic approximation in which design elements of the stochastic terms mimic patterns from a factorial design . our findings are validated by numerical experiments on simulated data sets of up to 1 million observations . we apply the approach to fit a space time model to over 80,000...	we discuss the statistical properties of a recently introduced unbiased stochastic approximation to the score equations for maximum likelihood calculation for gaussian processes . under certain conditions , including bounded condition number of the covariance matrix , the approach achieves storage and nearly computatio...
1312.2687	r	[ secexp ] in this section we show a few experimental results based on a partially occluded regular grid . the rationale for using such a partial grid is to illustrate a setting where spectral techniques do not work so well but efficient matrix vector multiplications are available . a partially occluded grid can occur...	we discuss the statistical properties of a recently introduced unbiased stochastic approximation to the score equations for maximum likelihood calculation for gaussian processes . under certain conditions , including bounded condition number of the covariance matrix , the approach achieves storage and nearly computatio...	we discuss the statistical properties of a recently introduced unbiased stochastic approximation to the score equations for maximum likelihood calculation for gaussian processes . under certain conditions , including bounded condition number of the covariance matrix , the approach achieves storage and nearly computatio...
hep-ph0405303	i	elastic electron - nucleon scattering in the one - photon exchange approximation is a time - honoured tool to access information on the structure of hadrons . experiments with increasing precision have become possible in recent years , mainly triggered by new techniques to perform polarization experiments at the electr...	we express this imaginary part as a phase space integral over the doubly virtual compton scattering tensor on the nucleon . we use unitarity to model the doubly virtual compton scattering tensor in the resonance region in terms of electroabsorption amplitudes . taking those amplitudes from a phenomenological analysis o...	we discuss the target and beam normal spin asymmetries in elastic electron - nucleon scattering which depend on the imaginary part of two - photon exchange processes between electron and nucleon . we express this imaginary part as a phase space integral over the doubly virtual compton scattering tensor on the nucleon ....
1508.06037	i	primordial angular momentum is believed to decay with the expansion of the universe and the observed rotations of galaxies and clusters are believed to originate from tidal interactions with local environments ( the tidal torque theory ) or the acquisition of orbital angular momentum from infalling matter ( the merging...	we employ a stochastic approach to probing the origin of the log - normal distributions of halo spin in n - body simulations . after analyzing spin evolution in halo merging trees the roles of major merging and accretion are also statistically analyzed in evolving spin distributions . several factors ( local environmen...	we employ a stochastic approach to probing the origin of the log - normal distributions of halo spin in n - body simulations . after analyzing spin evolution in halo merging trees , it was found that a spin change can be characterized by a stochastic random walk of angular momentum . also , spin distributions generated...
hep-ph0302162	r	we present in this section the results of the analytic integration of eq.([eq : ref1 ] ) and eq.([eq : ref2 ] ) as a function of @xmath40 . as already said , @xmath15 is the small photon mass " used for the parameterization of the infrared divergences . all the polylogarithms depend on @xmath9 through the variable @xm...	11.55.fv , 12.20.ds , 13.40.gp ttp03 - 05 + 3.5 cm 1.cm p. mastrolia and e. remiddi 1.0 cm _ dipartimento di fisica , universit di bologna , i-40126 bologna , italy + 0.4 cm institut fr theoretische teilchenphysik , universitt karlsruhe , d-76128 karlsruhe , germany + 0.4 cm infn , sezione di bologna , i-40...	we evaluate the on shell form factors of the electron for arbitrary momentum transfer and finite electron mass , at two loops in qed , by integrating the corresponding dispersion relations , which involve the imaginary parts known since a long time . the infrared divergences are parameterized in terms of a fictitious s...
gr-qc9803061	i	since the discovery of black holes whose event horizons have nontrivial topology @xcite there has been much research activity in this area . charged versions of these black holes were presented in @xcite , and also rotating generalizations are known @xcite . moreover , they also exist in dilaton gravity @xcite . mann @...	first , massless scalar fields and weyl spinors which propagate in the background of an anti de sitter black hole are considered in an exactly soluble two dimensional toy model . the boulware , unruh , and hartle hawking vacua are defined . the latter results to coincide with the unruh vacuum due to the boundary con...	we examine quantum properties of topological black holes which are asymptotically anti de sitter . first , massless scalar fields and weyl spinors which propagate in the background of an anti de sitter black hole are considered in an exactly soluble two dimensional toy model . the boulware , unruh , and hartle hawk...
1003.2750	i	advances in experimental techniques have led to a great number of experimental studies on electron transport through molecular junctions formed by single molecules bridged between electrodes or molecular monolayers adsorbed onto surfaces , using three - terminal set - ups or scanning tunneling microscopy ( stm ) measur...	we analyze the effects of bonding type , molecular orientation , and geometry relaxation on the electronic properties and charge and spin transport across the single - molecule junction . we consider nine interface geometries leading to five bonding mechanisms and two molecular orientations : ( i ) au - c bonding , ( i...	we examine theoretically coherent electron transport through the single - molecule magnet mn , bridged between au(111 ) electrodes , using the non - equilibrium green s function method and the density - functional theory . we analyze the effects of bonding type , molecular orientation , and geometry relaxation on the e...
1003.2750	r	we examine the nine interface geometries ( fig . [ fig : geo ] ) leading to the five bonding types and two molecular orientations that were discussed in sec . i. their molecular orientations , linker groups , bonding types , binding sites , and distances @xmath19 between the electrodes are listed in table 1 . i...	relaxation of the junction geometries mainly shifts the relevant occupied molecular levels toward the fermi energy as well as slightly reduces the broadening of the lumo level . as a result , the current slightly decreases at low bias voltage . consequently , junctions with the former orientation yield a higher current...	we examine theoretically coherent electron transport through the single - molecule magnet mn , bridged between au(111 ) electrodes , using the non - equilibrium green s function method and the density - functional theory . we analyze the effects of bonding type , molecular orientation , and geometry relaxation on the e...
1003.2750	c	we simulated a single - molecule junction based on the smm mn@xmath0 connected to au(111 ) electrodes via five different bonding mechanisms and two molecular orientations , and calculated their transport properties , using the non - equilibrium green s function method and the spin - polarized dft . geometry relaxation ...	we examine theoretically coherent electron transport through the single - molecule magnet mn , bridged between au(111 ) electrodes , using the non - equilibrium green s function method and the density - functional theory . we find that the electron transport is carried by the lowest unoccupied molecular orbital ( lumo ...	we examine theoretically coherent electron transport through the single - molecule magnet mn , bridged between au(111 ) electrodes , using the non - equilibrium green s function method and the density - functional theory . we analyze the effects of bonding type , molecular orientation , and geometry relaxation on the e...