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1409.3897	r	this paper mainly treats hypothesis testing in a bipartite quantum system and its @xmath4-copies extension . for this purpose , we firstly discuss hypothesis testing in a general quantum system @xmath9 and its @xmath4-copies extension . in quantum hypothesis testing , we consider two hypotheses , the null hypothesis an...	we consider asymptotic hypothesis testing ( or state discrimination with asymmetric treatment of errors ) between an arbitrary fixed bipartite pure state and the completely mixed state under one - way locc ( local operations and classical communications ) , two - way locc , and separable povms . as a result	we consider asymptotic hypothesis testing ( or state discrimination with asymmetric treatment of errors ) between an arbitrary fixed bipartite pure state and the completely mixed state under one - way locc ( local operations and classical communications ) , two - way locc , and separable povms . as a result , we derive...
math0105111	i	let @xmath4 denote the space of ( ordered ) partitions of @xmath5 , that is @xmath6 by _ size - biased _ sampling according to a point @xmath7 we mean picking the @xmath8-th part @xmath9 with probability @xmath9 . the starting point for our study is the following markov chain on @xmath4 , which we call a _ coagulation ...	we consider markov chains on the space of ( countable ) partitions of the interval $ ] , obtained first by size biased sampling twice ( allowing repetitions ) and then merging the parts with probability ( if the sampled parts are distinct ) or splitting the part with probability according to a law ( if the same part wa...	we consider markov chains on the space of ( countable ) partitions of the interval $ ] , obtained first by size biased sampling twice ( allowing repetitions ) and then merging the parts with probability ( if the sampled parts are distinct ) or splitting the part with probability according to a law ( if the same part wa...
1602.00717	i	consider an open bounded domain @xmath1 ( @xmath2 ) . let @xmath3 be an operator defined as @xmath4 , where @xmath5 be a real @xmath6 matrix on @xmath7 that is bounded measurable and uniformly elliptic : that is , there exists a constant @xmath8 such that @xmath9 for all @xmath10 and @xmath11 . the matrix @xmath12 is n...	we consider the dirichlet boundary value problem for divergence form elliptic operators with bounded measurable coefficients . we prove that for uniform domains with ahlfors regular boundary , the bmo solvability of such problems is equivalent to a quantitative absolute continuity of the elliptic measure with respect t...	we consider the dirichlet boundary value problem for divergence form elliptic operators with bounded measurable coefficients . we prove that for uniform domains with ahlfors regular boundary , the bmo solvability of such problems is equivalent to a quantitative absolute continuity of the elliptic measure with respect t...
1411.6284	i	the mean field theory provides in principle a fair approximation of time evolved quantum states by many - body schrdinger dynamics in the mean field scaling ; namely when the number of particles is large and the pair interaction potential is proportionally weak . during the last decade , a strong activity around the me...	we consider the time evolution of quantum states by many - body schrdinger dynamics and study the rate of convergence of their reduced density matrices in the mean field limit . if the prepared state at initial time is of coherent or factorized type and the number of particles is large enough then it is known that is t...	we consider the time evolution of quantum states by many - body schrdinger dynamics and study the rate of convergence of their reduced density matrices in the mean field limit . if the prepared state at initial time is of coherent or factorized type and the number of particles is large enough then it is known that is t...
0903.3108	i	the observation @xcite of a fractional quantum hall ( fqh ) state at @xmath0 and suggestion @xcite that the moore - read pfaffian ( mr ) state @xcite might occur at this filling fraction gave the first real indication that non - abelian topological phases of matter might actually occur in nature . the striking featu...	we compare the predictions of several different models of the state of the electrons at this plateau : the moore - read , anti - pfaffian , su naf , strong pairing , and states . et al . we suggest further experiments which could help rule out some possible scenarios .	we consider the tunneling current through a double point - contact fabry - prot interferometer such as used in recent experimental studies of the fractional quantum hall plateau at filling fraction . we compare the predictions of several different models of the state of the electrons at this plateau : the moore - read ...
0903.3108	c	we close this discussion by assuming , for a moment , that the experiments of refs . are , in fact , performing interferometry on the @xmath0 state of the sort envisioned in refs . and are detecting non - abelian quasiparticles . what forecast would these results give for topological quantum computation @xcite ? cer...	we make the corresponding predictions for future tunneling and interference experiments at the other observed second landau level fractional quantum hall states . `` with luck , we might see a non - abelian interferometer within a year . '' attributed to kirill shtengel , april 16 , 2008 in _ quantum computation : ...	we consider the tunneling current through a double point - contact fabry - prot interferometer such as used in recent experimental studies of the fractional quantum hall plateau at filling fraction . we compare the predictions of several different models of the state of the electrons at this plateau : the moore - read ...
1701.08367	c	in this work we have presented a systematic study of weakly interacting bosonic gases with local and non - local multi - body interactions in the bogoliubov approximation . we considered conservative multi - body interactions for which the number of particles is conserved : of course multi - body interactions are assoc...	we consider weakly interacting bosonic gases with local and non - local multi - body interactions . by using the bogoliubov approximation , we first investigate contact interactions , studying the case in which the interparticle potential can be written as a sum of-body-interactions , and then considering general conta...	we consider weakly interacting bosonic gases with local and non - local multi - body interactions . by using the bogoliubov approximation , we first investigate contact interactions , studying the case in which the interparticle potential can be written as a sum of-body-interactions , and then considering general conta...
1509.07116	i	kac @xcite in 1956 to obtain a solution from a poisson of the telegraph equation @xmath3 with @xmath4 , introduced the processes @xmath5 where @xmath6 is a poisson process of intensity @xmath7 . he noticed that if in equation ( [ tele ] ) the parameters @xmath7 and @xmath8 tend to infinity with @xmath9 constant and equ...	we construct a family of processes , from a single poisson process , that converges in law to a complex brownian motion . moreover , we find realizations of these processes that converge almost surely to the complex brownian motion , uniformly on the unit time interval . finally the rate of convergence is derived . d...	we construct a family of processes , from a single poisson process , that converges in law to a complex brownian motion . moreover , we find realizations of these processes that converge almost surely to the complex brownian motion , uniformly on the unit time interval . finally the rate of convergence is derived . d...
1607.02792	i	the entscheidungsproblem from mathematical logic led ramsey @xcite to the following combinatorial principle that became a cornerstone of an area now called ramsey theory . [ thm : ramsey ] for any positive integers @xmath1 , @xmath0 , and @xmath2 there exists a positive integer @xmath3 with @xmath4 i.e. , such that no...	we construct a ramsey class whose objects are steiner systems . in contrast to the situation with general-uniform hypergraphs , it turns out that simply putting linear orders on their sets of vertices is not enough for this purpose : one also has to strengthen the notion of subobjects used from `` induced subsystems ''...	we construct a ramsey class whose objects are steiner systems . in contrast to the situation with general-uniform hypergraphs , it turns out that simply putting linear orders on their sets of vertices is not enough for this purpose : one also has to strengthen the notion of subobjects used from `` induced subsystems ''...
1304.0391	i	by mostow rigidity , a hyperbolic structure on a closed -manifold @xmath2 is unique up to isometry . while the geometry of @xmath2 is thus completely determined by its underlying topology , it can be difficult to understand the qualitative and quantitative connections between these two facets of @xmath2 . here , we sho...	we construct hyperbolic integer homology 3-spheres where the injectivity radius is arbitrarily large for nearly all points of the manifold . as a consequence , there exists a sequence of closed hyperbolic -manifolds which benjamini - schramm converge to whose normalized ray - singer analytic torsions do _ not _ converg...	we construct hyperbolic integer homology 3-spheres where the injectivity radius is arbitrarily large for nearly all points of the manifold . as a consequence , there exists a sequence of closed hyperbolic -manifolds which benjamini - schramm converge to whose normalized ray - singer analytic torsions do _ not _ converg...
1504.03389	i	consider a sample @xmath5 we look for substitutes @xmath6 * * and * * @xmath7 of the sample mean vector and covariance matrix , that are resistant to atypical observations . we also want estimators that have a high efficiency for normal samples@xmath8 as a measure of robustness we consider not only the breakdown point ...	the most frequently employed estimators are not quite satisfactory in this respect . the minimum volume ellipsoid ( mve ) and minimum covariance determinant ( mcd ) estimators are known to have a very low efficiency . s - estimators with a monotonic weight function like the bisquare have a low efficiency for small and ...	we deal with the equivariant estimation of scatter and location for-dimensional data , giving emphasis to scatter . it is important that the estimators possess both a high efficiency for normal data and a high resistance to outliers , that is , a low bias under contamination . the most frequently employed estimators ar...
astro-ph0003220	i	a number of codes were built in the past to compute the structure and the emission of photoionized media . with time , these codes became more and more sophisticated , and able to treat a larger number of situations . in the sixties they were specially designed for planetary nebulae and hii regions , i.e. for dilute an...	we describe a code designed for hot media ( t a few 10 k ) , optically thick to compton scattering . the transfer code is coupled with a monte carlo code which allows to take into account compton and inverse compton diffusions , and to compute the spectrum emitted up to mev energies , in any geometry . several applicat...	we describe a code designed for hot media ( t a few 10 k ) , optically thick to compton scattering . it computes the structure of a plane - parallel slab of gas in thermal and ionization equilibrium , illuminated on one or on both sides by a given spectrum . contrary to the other photoionization codes , it solves the t...
astro-ph0003220	m	it is not always clear which approximations are used in the different codes . basically the computation of the diffuse radiation field seems to be similar in all codes , except in ross & fabian ( 1993 ) and in subsequent works using this code , where it is computed using the kompaneets equation . ( ferland 1996 ) , ( k...	we stress the importance of taking into account the returning flux even for small column densities ( 10 ) , and we show that the escape probability approximation can lead to strong errors in the thermal and ionization structure , as well as in the emitted spectrum , for a thomson thickness larger than a few tenths .	we describe a code designed for hot media ( t a few 10 k ) , optically thick to compton scattering . it computes the structure of a plane - parallel slab of gas in thermal and ionization equilibrium , illuminated on one or on both sides by a given spectrum . contrary to the other photoionization codes , it solves the t...
1211.4250	i	partitioning a phase space into orbits is a central step in the study of any physical or formal dynamics . immediately after the introduction of graph ( /stabilizer ) states in quantum coding theory @xcite and in the context of measurement - based quantum computation @xcite , it was evident that the related task , when...	we describe a construction that maps any connected graph on three or more vertices into a larger graph , , whose independence number is strictly smaller than its lovsz number which is equal to its fractional packing number . the vertices of represent all possible events consistent with the stabilizer group of the graph...	we describe a construction that maps any connected graph on three or more vertices into a larger graph , , whose independence number is strictly smaller than its lovsz number which is equal to its fractional packing number . the vertices of represent all possible events consistent with the stabilizer group of the graph...
1411.0641	i	the gemini nici planet - finding campaign was a direct - imaging survey of about 250 nearby stars for substellar and planetary - mass companions conducted at gemini south observatory between 2008 and 2012 @xcite . the campaign used the near - infrared coronagraphic imager ( nici , * ? ? ? * ) , which combines adaptive ...	the campaign requires a relative astrometric accuracy of mas across multi - year timescales in order to distinguish true companions from background stars by verifying common proper motion and parallax with their parent stars . most of the campaign data in the gemini science archive are accurate to this level but we id...	we describe the astrometric calibration of the gemini nici planet - finding campaign . the campaign requires a relative astrometric accuracy of mas across multi - year timescales in order to distinguish true companions from background stars by verifying common proper motion and parallax with their parent stars . the c...
1010.3101	i	the study of eleven dimensional @xmath7 invariant half - bps supergravity configurations started in @xcite . they depend on a single scalar function satisfying a non - linear toda equation . when there is an extra rotational @xmath8 isometry , there exists an implicit change of variables mapping the latter to a laplace...	this allows us to identify the appropriate boundary conditions describing the most general smooth and superstar - like singular configurations . we also compute their masses , matching the expected result from their microscopic interpretation , but now at finite radius of curvature . + _ theoretical physics grou...	we describe the geometry of the invariant half - bps m - theory configurations considered in llm in terms of their electrostatic variables . we discuss both regular configurations , such as adss and adss vacua or simple excited solutions , and singular ones such as the superstar geometries . this allows us to identify ...
cond-mat0207167	i	an important property of most quantum phase transitions studied to date in systems with a metallic fermi surface in spatial dimensions @xmath0 is that the critical field theory for the order parameter is a free gaussian theory @xcite . this result has its origin in the fact that the order parameters considered can be e...	we describe two dimensional models with a metallic fermi surface which display quantum phase transitions controlled by strongly interacting critical field theories below their upper critical dimension . the primary examples involve transitions with a topological order parameter associated with dislocations in collinear...	we describe two dimensional models with a metallic fermi surface which display quantum phase transitions controlled by strongly interacting critical field theories below their upper critical dimension . the primary examples involve transitions with a topological order parameter associated with dislocations in collinear...
1207.6042	i	we have described a large ( more than 400 nights ) ground - based survey which started in 2007 and is expected to end in 20132014 , aimed at building a grid of spss for the flux calibration of gaia spectra and magnitudes . the technical complexity of gaia requires a large ( @xmath0200 ) set of spss flux tables , calibr...	we describe two ground based observing campaigns aimed at building a grid of approximately 200 spectrophotometric standard stars ( spss ) , with an internal% precision and tied to vega within% , for the absolute flux calibration of data gathered by gaia , the esa astrometric mission . in fact , all candidates are also ...	we describe two ground based observing campaigns aimed at building a grid of approximately 200 spectrophotometric standard stars ( spss ) , with an internal% precision and tied to vega within% , for the absolute flux calibration of data gathered by gaia , the esa astrometric mission . the criteria for the selection and...
astro-ph9905295	i	the nature of non - luminous matter that is not part of detected and catalogued galaxies remains unsolved by modern astrophysics . as mentioned in a recent thesis , low surface brightness ( lsb ) objects may prove to be the `` icebergs '' of the extragalactic world ( de blok 1997 ) . some searches for non - luminous ma...	we detected a ring - like distribution of far - infrared emission in the direction of the center of the virgo cluster . we studied this feature in the fir , radio , and optical domains , and deduced that the dust within the feature reddens the galaxies in the direction of the virgo cluster but does not affect stars wit...	we detected a ring - like distribution of far - infrared emission in the direction of the center of the virgo cluster . we studied this feature in the fir , radio , and optical domains , and deduced that the dust within the feature reddens the galaxies in the direction of the virgo cluster but does not affect stars wit...
astro-ph9905295	c	we identified a ring - like feature of fir emission at high galactic latitude , which is distant from the main body of the galaxy and extinguishes light from galaxies in the central part of the virgo cluster ( vc ) . there is no way to establish a distance to the extinguishing cloud with the data we presented above , e...	we propose that a highly supersonic past collision between an hi cloud and the galactic hi formed a shock that heated the interface gas to soft x - ray temperatures . hi remnants from the projectile and from the shocked galactic hi rain down onto the disk as intermediate velocity gas . our finding emphasizes that ex...	we detected a ring - like distribution of far - infrared emission in the direction of the center of the virgo cluster . we studied this feature in the fir , radio , and optical domains , and deduced that the dust within the feature reddens the galaxies in the direction of the virgo cluster but does not affect stars wit...
1501.07442	i	the identification of high - energy ( regge ) dynamics in qcd processes has been long since theoretically investigated . with the advent of high - energy colliders like hera , tevatron and lhc such studies have become possible at experimental level too . the processes which are expected to be more sensitive to this pec...	we determine the jet vertex for mueller - navelet jets and forward jets in the small - cone approximation for two particular choices of jet algoritms : the kt algorithm and the cone algorithm . the differences with the original calculations of the small - cone jet vertex by ivanov and papa , which is found to be equiva...	we determine the jet vertex for mueller - navelet jets and forward jets in the small - cone approximation for two particular choices of jet algoritms : the kt algorithm and the cone algorithm . these choices are motivated by the extensive use of such algorithms in the phenomenology of jets . the differences with the or...
1302.4593	i	the study of effective smooth torus actions on compact , smooth manifolds has a rich and long tradition in the theory of smooth transformation groups ( cf . @xcite ) . in riemannian geometry , starting with hsiang and kleiner s topological classification of compact riemannian @xmath0-manifolds of positive ( sectional )...	we also study closed singular riemannian foliations whose leaves are homeomorphic to aspherical or to bieberbach manifolds . these foliations , which we call _ a - foliations _ and _ b - foliations _ , respectively , generalize isometric torus actions on riemannian manifolds . we apply our results to the classification...	we determine the structure of the fundamental group of the regular leaves of a closed singular riemannian foliation on a compact , simply connected riemannian manifold . we also study closed singular riemannian foliations whose leaves are homeomorphic to aspherical or to bieberbach manifolds . these foliations , which ...
1306.1999	i	gaussian process ( gp ) models provide a flexible , probabilistic approach to regression and are widely used . however , application of gp models to large data sets is challenging as the memory and computational requirements scale as @xmath0 and @xmath1 respectively , where @xmath2 is the number of training data points...	we develop a fast variational approximation scheme for gaussian process ( gp ) regression , where the spectrum of the covariance function is subjected to a sparse approximation . our approach enables uncertainty in covariance function hyperparameters to be treated without using monte carlo methods and is robust to over...	we develop a fast variational approximation scheme for gaussian process ( gp ) regression , where the spectrum of the covariance function is subjected to a sparse approximation . our approach enables uncertainty in covariance function hyperparameters to be treated without using monte carlo methods and is robust to over...
1306.1999	c	in this paper , we have presented a nonconjugate variational message passing algorithm for fitting sparse spectrum gp regression models where closed form updates are possible for all variational parameters , except for the evaluation of @xmath116 . we note that @xmath116 can be evaluated very efficiently using quadratu...	second , we propose a novel adaptive neighbourhood technique for obtaining predictive inference that is effective in dealing with nonstationarity . weighting dimensions according to lengthscales , this downweights variables of little relevance , leading to automatic variable selection and improved prediction . third , ...	we develop a fast variational approximation scheme for gaussian process ( gp ) regression , where the spectrum of the covariance function is subjected to a sparse approximation . our approach enables uncertainty in covariance function hyperparameters to be treated without using monte carlo methods and is robust to over...
1101.5805	i	as advances in technology allow for the collection and storage of vast databases , there is a growing need for advanced machine learning techniques for speeding up the execution of queries on such large datasets . in this work we focus on the fundamental task of estimating the selectivity , or output size , of a databa...	we develop a novel method , based on the statistical concept of the _ vapnik - chervonenkis dimension _ , to evaluate the selectivity ( output cardinality ) of sql queries a crucial step in optimizing the execution of large scale database and data - mining operations . the major theoretical contribution of this work ,...	we develop a novel method , based on the statistical concept of the _ vapnik - chervonenkis dimension _ , to evaluate the selectivity ( output cardinality ) of sql queries a crucial step in optimizing the execution of large scale database and data - mining operations . the major theoretical contribution of this work ,...
1209.3071	i	cooling and trapping polyatomic molecules is a promising research direction within the rapidly expanding field of cold molecular gases @xcite . because of their rich internal structure and coupled vibrational degrees of freedom , polyatomic molecules offer new research opportunities at the interface between chemistry ,...	we develop a rigorous quantum mechanical theory for collisions of polyatomic molecular radicals with s - state atoms in the presence of an external magnetic field . the theory is based on a fully uncoupled space - fixed basis set representation of the multichannel scattering wavefunction . explicit expressions are pres...	we develop a rigorous quantum mechanical theory for collisions of polyatomic molecular radicals with s - state atoms in the presence of an external magnetic field . the theory is based on a fully uncoupled space - fixed basis set representation of the multichannel scattering wavefunction . explicit expressions are pres...
0811.4768	i	we use the term _ protodisc _ to refer to the disc region that is initially formed when wind material from a star is channelled by dipole - type magnetic fields towards the equatorial plane . the material in a protodisc region has no radial motion and rotates with the magnetic field . it is bounded above and below by s...	we develop equations and obtain solutions for the structure and evolution of a protodisc region that is initially formed with no radial motion and super - keplerian rotation speed when wind material from a hot rotating star is channelled towards its equatorial plane by a dipole - type magnetic field .	we develop equations and obtain solutions for the structure and evolution of a protodisc region that is initially formed with no radial motion and super - keplerian rotation speed when wind material from a hot rotating star is channelled towards its equatorial plane by a dipole - type magnetic field . its temperature i...
0811.4768	c	in this paper , we set up equations and jump conditions to study the formation , structure and evolution of protodiscs around rotating magnetic stars with winds . we obtain solutions for a variety of stellar models with different rotation rates and magnetic field strengths . when the magnetic field of a rotating hot st...	its temperature is aroundk because of shock heating and the inflow of wind material causes its equatorial density to increase with time . the centrifugal force and thermal pressure increase relative to the magnetic force and material escapes at its outer edge . the angular velocity of the protodisc region decreases rad...	we develop equations and obtain solutions for the structure and evolution of a protodisc region that is initially formed with no radial motion and super - keplerian rotation speed when wind material from a hot rotating star is channelled towards its equatorial plane by a dipole - type magnetic field . its temperature i...
alg-geom9706004	i	suppose we are given linear subspaces @xmath0 of @xmath1 with @xmath2 and @xmath3 . our problem is to find all @xmath4-dimensional linear subspaces of @xmath1 which meet each @xmath5 nontrivially . when the given linear subspaces are in general position , the condition @xmath6 guarantees that there is a finite number @...	we develop numerical homotopy algorithms for solving systems of polynomial equations arising from the classical schubert calculus . these homotopies are optimal in that generically no paths diverge . for problems defined by hypersurface schubert conditions we give two algorithms based on extrinsic deformations of the g...	we develop numerical homotopy algorithms for solving systems of polynomial equations arising from the classical schubert calculus . these homotopies are optimal in that generically no paths diverge . for problems defined by hypersurface schubert conditions we give two algorithms based on extrinsic deformations of the g...
astro-ph0401356	i	growing numbers of large - scale jets in powerful extragalactic radio sources are now being observed at optical and x - ray frequencies ( see , e.g. , * ? ? ? new , and in many ways unexpected , results call for a wide discussion of the physical conditions within these objects , and in particular of the processes respo...	we discuss morphological properties of the large - scale jets in powerful radio sources , which are now observed at radio , optical and x - ray frequencies , in order to determine the origin of their x - ray radiation and the nature of the particle acceleration responsible for their multiwavelength emission . we sugges...	we discuss morphological properties of the large - scale jets in powerful radio sources , which are now observed at radio , optical and x - ray frequencies , in order to determine the origin of their x - ray radiation and the nature of the particle acceleration responsible for their multiwavelength emission . we show t...
astro-ph0401356	c	we propose that the knots observed in large - scale quasar jets in radio , optical and x - rays represent portions of the jet with an excess of kinetic power due to intermittent high activity of the jet engine . the appropriate time scales for jet activity and quiescent epochs ( @xmath71 yr and @xmath125 yr , respectiv...	such problems are especially pronounced if the observed x - ray emission is due to inverse - compton scattering of the cmb radiation . the proposed model can explain some morphological properties of quasar jets like high knot - to - interknot brightness contrasts , frequency - independent knot profiles and almost univ...	we discuss morphological properties of the large - scale jets in powerful radio sources , which are now observed at radio , optical and x - ray frequencies , in order to determine the origin of their x - ray radiation and the nature of the particle acceleration responsible for their multiwavelength emission . we show t...
1206.0969	i	the famous no - go theorem @xcite states that lattice fermion actions with chiral symmetry , locality and other common features must produce massless degrees of freedom in multiples of two in a continuum limit . this is contradictory with a phenomenological fact that there exist only three quarks with masses below the ...	we study strong - coupling lattice qcd with the karsten - wilczek formulation , which has one relevant parameter as well as gauge coupling and a mass parameter . we find a nontrivial chiral phase structure with a second - order phase transition between chiral symmetric and broken phases . to capture the whole structure...	we discuss the chiral phase diagram in the parameter space of lattice qcd with minimal - doubling fermions , which can be seen as lattice fermions with flavored chemical potential terms . we study strong - coupling lattice qcd with the karsten - wilczek formulation , which has one relevant parameter as well as gauge co...
1003.1744	i	starlight produced by the first galaxies is the leading candidate for ionizing the hydrogen as well as singly ionizing the helium at @xmath10 . it takes a harder source of radiation to doubly ionize the helium , so the reionization of this species is likely deferred until @xmath11 when quasars produce a sufficient hard...	we find that this objective can be accomplished ( using coeval h i ly absorption to mask dense regions and in cross correlation ) with a spectral resolution of and a signal - to - noise ratio per resolution element of . we also discuss how he i absorption can be used to measure the hardness of the ionizing backgrou...	we discuss the potential of using the he i forest to detect and study he ii reionization . significant absorption is expected from intergalactic he ii regions , whereas there should be no detectable absorption from low density gas in he iii regions . unlike he ii ly absorption ( the subject of much recent s...
1003.1744	c	this paper discussed the usefulness of the he i @xmath0 forest to study he ii reionization at @xmath313 . the optical depth of the he i @xmath0 line is proportional to the optical depth in h i ly@xmath1 by the factor @xmath314 ( ignoring differences in the amount of thermal broadening between h i and he i ...	we discuss the potential of using the he i forest to detect and study he ii reionization . we estimate the requirements for a definitive detection of redshifted he i absorption from low density gas ( ) , which would indicate that he ii reionization was occurring . such specifications may be achievable on a few...	we discuss the potential of using the he i forest to detect and study he ii reionization . significant absorption is expected from intergalactic he ii regions , whereas there should be no detectable absorption from low density gas in he iii regions . unlike he ii ly absorption ( the subject of much recent s...
hep-ph9812230	i	the search for supersymmetry ( susy ) @xcite plays an important rle in the experimental program at the colliders lep2 and tevatron . it will be even more important at future colliders , e.g. an upgraded tevatron , lhc , an @xmath6 linear collider or a @xmath7 collider . therefore many phenomenological studies have been...	we discuss the three - body decays , , , and ( ) of the lighter top squark within the minimal supersymmetric standard model . we give the complete analytical formulas for the decay widths and present a numerical study in view of an upgraded tevatron , the cern lhc , and a future lepton collider demonstrating the import...	we discuss the three - body decays , , , and ( ) of the lighter top squark within the minimal supersymmetric standard model . we give the complete analytical formulas for the decay widths and present a numerical study in view of an upgraded tevatron , the cern lhc , and a future lepton collider demonstrating the import...
astro-ph0307056	i	afterglow emission , spanning from radio to x - ray , and observable from minutes to weeks after the event , appears to be a ubiquitous feature of long - duration gamma - ray burst explosions . afterglows result from radiation emitted by electrons accelerated in a relativistic shock produced by the explosion of a proge...	we employ a fireball model of the gamma - ray burst explosion to constrain intrinsic and environmental parameters of four events with good broadband afterglow data ; grb 970508 , grb 980329 , grb 980703 , and grb 000926 . using the standard assumptions of constant circumburst density and no evolution of the fractio...	we employ a fireball model of the gamma - ray burst explosion to constrain intrinsic and environmental parameters of four events with good broadband afterglow data ; grb 970508 , grb 980329 , grb 980703 , and grb 000926 . using the standard assumptions of constant circumburst density and no evolution of the fractio...
astro-ph0307056	c	we fit four well - studied bursts with extensive radio through x - ray afterglow datasets to a fireball model with simple assumptions concerning the microphysics and environment . we find a range of reasonable environmental and geometrical parameters . we find all four fit best with a constant density medium , one with...	we find a variety of parameters : densities that range from those of the ism to diffuse clouds , energies comparable to the total grb-ray energy , collimations from near - isotropy to 0.04 radians , substantial electron energy fractions of 10 - 30% with energy distribution indices of 2.1 - 2.9 and magnetic energy fract...	we employ a fireball model of the gamma - ray burst explosion to constrain intrinsic and environmental parameters of four events with good broadband afterglow data ; grb 970508 , grb 980329 , grb 980703 , and grb 000926 . using the standard assumptions of constant circumburst density and no evolution of the fractio...
1406.3741	i	dislocations are line defects in crystalline materials which play an important role in governing the deformation and failure mechanisms in solids . the energetics of dislocations and their interactions with other defects solute atoms , precipitates , grain boundaries , surfaces and interfaces significantly influence ...	we employed a real - space formulation of orbital - free density functional theory using finite - element basis to study the defect - core and energetics of an edge dislocation in aluminum . our study shows that the core - size of a perfect edge dislocation is around ten times the magnitude of the burgers vector . cons...	we employed a real - space formulation of orbital - free density functional theory using finite - element basis to study the defect - core and energetics of an edge dislocation in aluminum . our study shows that the core - size of a perfect edge dislocation is around ten times the magnitude of the burgers vector . this...
1406.3741	r	we now present our study of an edge dislocation in aluminum using large - scale electronic - structure calculations . in particular , we unambiguously identify the size of the dislocation core , directly compute the dislocation core - energy , study the effect of macroscopic deformations on dislocation core - energy an...	this finding is contrary to the widely accepted notion that continuum descriptions of dislocation energetics are accurate beyond burgers vector from the dislocation line . interestingly , our study revealed a significant influence of macroscopic deformations on the core - energy of shockley partials . further , we demo...	we employed a real - space formulation of orbital - free density functional theory using finite - element basis to study the defect - core and energetics of an edge dislocation in aluminum . our study shows that the core - size of a perfect edge dislocation is around ten times the magnitude of the burgers vector . this...
0906.0286	c	for the first time in the literature we have estimated the cross section for exclusive @xmath0 meson ( glueball candidate ) production not far from the threshold . we have included both gluon induced diffractive and triangle - double - diffractive mechanisms as well as the pion - pion exchange contributions . the qc...	, pion - pion meson exchange current ( mec ) components as well as double - diffractive mechanism with intermediate pionic loop are calculated for the first time in the literature . the pion - pion component , which can be reliably calculated , dominates close to the threshold while the diffractive component may take o...	we evaluate differential distributions for exclusive scalar meson ( glueball candidate ) production for ( fair@gsi ) and ( j - parc@tokai ) . both qcd diffractive , pion - pion meson exchange current ( mec ) components as well as double - diffractive mechanism with intermediate pionic loop are calculated for the first ...