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astro-ph0408508	i	recently , strong evidence has been presented that a sub - class of type iin supernovae ( sn ) ( ` n ' stands for narrow h@xmath2 ) includes rare sn ia events exploding in a dense circumstellar medium ( csm ) ( hamuy et al . 2003 ) . to date , the new variety comprises three events : sn 2002ic , sn 1997cy and sn 1999...	we propose a model to account for the bolometric light curve , quasi - continuum and the ca ii emission features of the peculiar type ia supernova ( sn ) 2002ic , which exploded in a dense circumstellar envelope . ( 2004 ) . stars : mass - loss supernovae : general supernovae : individual ( sn 2002ic )	we propose a model to account for the bolometric light curve , quasi - continuum and the ca ii emission features of the peculiar type ia supernova ( sn ) 2002ic , which exploded in a dense circumstellar envelope . the model suggests that the sn ia had the maximum possible kinetic energy and that the ejecta expand in...
astro-ph0408508	c	the aim of this paper was to develop a unified model for the light curve and spectrum of sn 2002ic assuming approximate spherical symmetry . our principal result is that the ca ii line profiles and the quasi - continuum are consistent with the interaction model provided that the sn ia has the maximum possible kinet...	the model suggests that the sn ia had the maximum possible kinetic energy and that the ejecta expand in an approximately spherically symmetric ( possibly clumpy ) circumstellar environment . the ca ii and quasi - continuum are emitted by shocked sn ejecta that underwent deformation and fragmentation in the intershoc...	we propose a model to account for the bolometric light curve , quasi - continuum and the ca ii emission features of the peculiar type ia supernova ( sn ) 2002ic , which exploded in a dense circumstellar envelope . the model suggests that the sn ia had the maximum possible kinetic energy and that the ejecta expand in...
1202.2797	i	the seyfert 1 galaxy mcg-6 - 30 - 15 is the primary `` disk - line '' target , in which a relativistically broadened iron k - emission line is suggested to originate in the innermost region of the accretion disk around the black hole ( e.g. , tanaka et al . mcg-6 - 30 - 15 is also known to exhibit characteristic x - ra...	we propose a simple spectral model for the seyfert 1 galaxy mcg-6 - 30 - 15 that can explain most of the 1 40 kev spectral variation by change of the partial covering fraction , similar to the one proposed by miller et al . ( 2008 ) .	we propose a simple spectral model for the seyfert 1 galaxy mcg-6 - 30 - 15 that can explain most of the 1 40 kev spectral variation by change of the partial covering fraction , similar to the one proposed by miller et al . ( 2008 ) . our spectral model is composed of three continuum components ; ( 1 ) a direct power...
1202.2797	c	[ phenomenological_inte_section ] we have seen that suzaku and chandra energy spectra of mcg6 - 30 - 15 are successfully described by the three - component model introduced with equation ( [ eq2 ] ) . we found @xmath42 , normalization of the heavily absorbed component , is anti - correlated with normalization of the di...	the heavy absorber in the second component is fragmented into many clouds , each of which is composed of radial zones with different ionization states and column densities , the main body ( , ) , the envelope ( , ) and presumably a completely opaque core . these parameters of the ionized absorbers , as well as the intr...	we propose a simple spectral model for the seyfert 1 galaxy mcg-6 - 30 - 15 that can explain most of the 1 40 kev spectral variation by change of the partial covering fraction , similar to the one proposed by miller et al . ( 2008 ) . our spectral model is composed of three continuum components ; ( 1 ) a direct power...
1202.2797	c	we have analyzed suzaku and chandra archival data of mcg-6 - 30 - 15 and constructed a new model to explain the observed spectral variation . our main conclusions are summarized below : 1 . we have shown that the observed energy spectra and spectral variation can be explained by the `` three - component model '' ( e...	our spectral model is composed of three continuum components ; ( 1 ) a direct power - law component , ( 2 ) a heavily absorbed power - law component by mildly ionized intervening matter , and ( 3 ) a cold disk reflection component far from the black hole with moderate solid - angle ( ) accompanying a narrow fluorescent...	we propose a simple spectral model for the seyfert 1 galaxy mcg-6 - 30 - 15 that can explain most of the 1 40 kev spectral variation by change of the partial covering fraction , similar to the one proposed by miller et al . ( 2008 ) . our spectral model is composed of three continuum components ; ( 1 ) a direct power...
1009.4033	i	modern lattice qcd simulations are mostly based on direct evaluation of the path integral of the theory . such approach , while being very general and efficient for many applications , suffers from a number of problems , most notable of which are the sign problem at finite chemical potential , critical slowing down at ...	we propose a stochastic method for solving schwinger - dyson equations in large- quantum field theories . expectation values of single - trace operators are sampled by stationary probability distributions of the so - called nonlinear random processes . we illustrate the method on the examples of the matrix - valued sca...	we propose a stochastic method for solving schwinger - dyson equations in large- quantum field theories . expectation values of single - trace operators are sampled by stationary probability distributions of the so - called nonlinear random processes . the set of all histories of such processes corresponds to the set o...
1005.0708	i	we have proposed a model of quasi - degenerate neutrinos which predicts the neutrinoless double beta decay mass observable to be approximately equal to the neutrino mass scale @xmath16 , thereby allowing its determination approximately independently of unknown majorana phases . in general such quasi - degenerate neutri...	we propose a supersymmetric model of quasi - degenerate neutrinos which predicts the effective neutrino mass relevant for neutrinoless double beta decay to be proportional to the neutrino mass scale , thereby allowing its determination approximately independently of unknown majorana phases . such a natural quasi - dege...	we propose a supersymmetric model of quasi - degenerate neutrinos which predicts the effective neutrino mass relevant for neutrinoless double beta decay to be proportional to the neutrino mass scale , thereby allowing its determination approximately independently of unknown majorana phases . such a natural quasi - dege...
1401.6949	i	the physics of topological defects , such as vortices , becomes especially intriguing at the interface between coexisting , topologically distinct phases of a macroscopically coherent system . due to different broken symmetries on either side , a defect can not perforate the interface unchanged . instead it must either...	we propose to use spatial control of the zeeman energy shifts in an ultracold atomic gas to engineer an interface between topologically distinct regions . this provides an experimentally accessible means for studying the interface physics of topological defects and textures . using the spin-1 bose - einstein condensate...	we propose to use spatial control of the zeeman energy shifts in an ultracold atomic gas to engineer an interface between topologically distinct regions . this provides an experimentally accessible means for studying the interface physics of topological defects and textures . using the spin-1 bose - einstein condensate...
math9812106	i	let @xmath0 be an affine kac - moody algebra , @xmath1 a @xmath2-submodule of a finite direct sum @xmath3 of irreducible integrable highest weight @xmath4-modules , and @xmath5 the limit of the demazure operator for an element @xmath6 of the weyl group as @xmath7 . the main theorem of this paper gives sufficient condit...	we prove a bosonic formula for the generating function of level - restricted paths for the infinite families of affine kac - moody algebras . in affine type a this yields an expression for the level - restricted generalized kostka polynomials . supported by the `` stichting fundamenteel onderzoek der materie '' . ]...	we prove a bosonic formula for the generating function of level - restricted paths for the infinite families of affine kac - moody algebras . in affine type a this yields an expression for the level - restricted generalized kostka polynomials . supported by the `` stichting fundamenteel onderzoek der materie '' . ]...
1004.2002	i	in discussing steady flows which are supersonic in the entrance section of a duct and then become subsonic , r. courant and k. o. friedrichs wrote in their classical monograph _ supersonic flow and shock waves _ @xcite that _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ...	we prove that for the two - dimensional steady complete compressible euler system , with given uniform upcoming supersonic flows , the following three fundamental flow patterns ( special solutions ) in gas dynamics involving transonic shocks are all unique in the class of piecewise smooth functions , under appropriate ...	we prove that for the two - dimensional steady complete compressible euler system , with given uniform upcoming supersonic flows , the following three fundamental flow patterns ( special solutions ) in gas dynamics involving transonic shocks are all unique in the class of piecewise smooth functions , under appropriate ...
1408.3502	i	an important part of a mathematical setting of probability theory can be considered as a special case of quantum theoretic kinematics . this can be seen most clearly when quantum theoretic kinematics is reformulated in algebraic terms , with quantum states defined as normal positive ( or normalised ) functionals over @...	we prove that the standard quantum mechanical description of a quantum state change due to measurement , given by lders rules , is a special case of the constrained maximisation of a quantum relative entropy functional . laplace rule as a special case of the constrained maximisation of relative entropy . the proof is...	we prove that the standard quantum mechanical description of a quantum state change due to measurement , given by lders rules , is a special case of the constrained maximisation of a quantum relative entropy functional . this result is a quantum analogue of the derivation of the bayes laplace rule as a special case...
1307.0017	i	upcoming galaxy cluster surveys from the millimeter to the x - ray wavelengths have the potential to identify thousands to hundreds of thousands of groups and clusters @xcite . these large cluster samples will be used to constrain the cosmological parameters which govern the growth of structure in our universe @xcite ....	we quantify the expected observed statistical and systematic uncertainties of the escape velocity as a measure of the gravitational potential and total mass of galaxy clusters . we focus our attention on low redshift ( z ) clusters , where large and deep spectroscopic datasets currently exist . utilizing a suite of mil...	we quantify the expected observed statistical and systematic uncertainties of the escape velocity as a measure of the gravitational potential and total mass of galaxy clusters . we focus our attention on low redshift ( z ) clusters , where large and deep spectroscopic datasets currently exist . utilizing a suite of mil...
1307.0017	m	under newtonian dynamics , the escape velocity is related to the gravitational potential of the system , @xmath12 if the dynamics of the system are controlled by the gravitational potential , tracers which have not escaped the potential well should exist in a well - defined region of @xmath13 phase space , where @xmath...	we find that the dynamical mass , as traced by either the virial relation or the escape velocity , is robust to variations in how dynamical friction is applied to `` orphan '' galaxies in the mock catalogs ( i.e. , those galaxies whose dark matter halos have fallen below the resolution limit ) . the bias we measure inc...	we quantify the expected observed statistical and systematic uncertainties of the escape velocity as a measure of the gravitational potential and total mass of galaxy clusters . we focus our attention on low redshift ( z ) clusters , where large and deep spectroscopic datasets currently exist . utilizing a suite of mil...
1307.0017	c	with the availability of large and complete spectroscopic surveys like the sloan digital sky survey ( * ? ? ? * sdss ) and gama ( galaxy mass and assembly gama ) @xcite , highly multiplexed multi - object optical spectroscopy on 8 m class telescopes ( imacs @xcite , vimos @xcite , deimos @xcite ) , and the latest gener...	we find that the caustic technique recovers the known halo masses ( ) with a third less scatter compared to the virial masses . we quantify how target selection based on magnitude , color , and projected radial separation can induce small additional biases into the escape velocity masses . using , the caustic technique...	we quantify the expected observed statistical and systematic uncertainties of the escape velocity as a measure of the gravitational potential and total mass of galaxy clusters . we focus our attention on low redshift ( z ) clusters , where large and deep spectroscopic datasets currently exist . utilizing a suite of mil...
astro-ph0303141	i	the high resolution of the has enabled astronomers to study the low - luminosity x - ray source populations in globular clusters in great detail . combined x - ray , radio , and optical _ hubble space telescope _ ( ) studies of the globular cluster 47 tucanae have revealed quiescent low - mass x - ray binaries ( qlmxbs...	the previously known transient low - mass x - ray binary ( lmxb ) exo 1745 - 248 in the cluster entered a rare high state during our august 2000 observation , complicating the analysis . their x - ray colors and luminosities , and spectral fitting , indicate that five of them are probably cataclysmic variables , and fo...	we report a acis - i observation of the dense globular cluster terzan 5 . the previously known transient low - mass x - ray binary ( lmxb ) exo 1745 - 248 in the cluster entered a rare high state during our august 2000 observation , complicating the analysis . nevertheless nine additional sources clearly associated wit...
astro-ph0107534	r	using the values for the geometrical factors just discussed , the 8 mr upper limit for the h@xmath0 flux , and values of @xmath79 and @xmath80 from equation ( [ phi_ex_calc ] ) we obtain values for the one sided ionizing flux of @xmath100 for the low , fiducial and high values of the geometrical correction factor @xma...	we report a new fabry - perot search for h emission from the intergalactic cloud hi 1225 in an attempt to measure the low redshift ionizing background radiation . conversion of this limit to limits on the strength of the ionizing background requires knowledge of the ratio of the projected to total surface area of thi...	we report a new fabry - perot search for h emission from the intergalactic cloud hi 1225 in an attempt to measure the low redshift ionizing background radiation . we set a new upper limit on h emission of 8 mr ( ergs s arcsec ) . conversion of this limit to limits on the strength of the ionizing background requir...
astro-ph0309103	i	the mass ratio distribution of binaries provides one of the few diagnostics for testing models of binary formation ( for recent reviews , see clarke 2001 ; tohline 2002 ; halbwachs et al . however , the use of the mass ratio distribution in spectroscopic binaries ( sbs ) has been limited because , in most studies , onl...	we report infrared spectroscopic observations of a large , well - defined sample of main - sequence , single - lined spectroscopic binaries in order to detect the secondaries and derive the mass ratio distribution of short - period binaries . the sample consists of 51 galactic disk spectroscopic binaries found in the c...	we report infrared spectroscopic observations of a large , well - defined sample of main - sequence , single - lined spectroscopic binaries in order to detect the secondaries and derive the mass ratio distribution of short - period binaries . the sample consists of 51 galactic disk spectroscopic binaries found in the c...
0707.1700	i	our understanding of the nature of the intergalactic medium ( igm ) and its evolution as traced by the absorption features observed in the sightlines towards luminous objects like quasars , has benefitted tremendously within the past few years both from observational and theoretical advances . high - resolution studies...	we report the results of a systematic search for signatures of metal lines in quasar spectra of the sloan digital sky survey ( sdss ) data release 3(dr3 ) , focusing on finding intervening absorbers via detection of their doublet . here in addition , we compare our findings with simulations of the lyman forest in order...	we report the results of a systematic search for signatures of metal lines in quasar spectra of the sloan digital sky survey ( sdss ) data release 3(dr3 ) , focusing on finding intervening absorbers via detection of their doublet . here we present the search algorithm , and criteria for distinguishing candidates from s...
1609.02078	c	a detailed characterization of the thickness dependence of dzyaloshinskii - moriya interaction ( dmi ) and spin - orbit torques ( sots ) in pt@xmath0co(t)@xmath0alo@xmath1 was obtained by mean of two different experimental techniques : current - induced domain wall motion and second - harmonic hall measurements . the s...	we report the thickness dependence of dzyaloshinskii - moriya interaction ( dmi ) and spin - orbit torques ( sots ) in ptco(t)alo , studied by current - induced domain wall ( dw ) motion and second - harmonic experiments . from the dw motion study , is found to initially increase and then saturate with an increasing fe...	we report the thickness dependence of dzyaloshinskii - moriya interaction ( dmi ) and spin - orbit torques ( sots ) in ptco(t)alo , studied by current - induced domain wall ( dw ) motion and second - harmonic experiments . from the dw motion study , a monotonous decay of the effective dmi strength with an increasing co...
1106.3042	c	let us summarize our main results . the detailed analysis of the reflection - and - transmission problem for the dirac electrons demonstrates essential differences from the conventional schrdinger case , due to the role of the berry phase . the reflection coefficient turns out to be nonanalytic function of the transver...	peculiarities of the chiral tunneling are naturally explained in terms of classical phase space . in a one - dimensional geometry we have also demonstrated that , for the case of asymmetric n - p - n junction in single layer graphene , there is total transmission for normal incidence only , side resonances are suppress...	we review chiral ( klein ) tunneling in single - layer and bilayer graphene and present its semiclassical theory , including the berry phase and the maslov index . peculiarities of the chiral tunneling are naturally explained in terms of classical phase space . in a one - dimensional geometry we reduced the original di...
0901.2070	i	the task of determining good trading strategies is a fundamental problem in mathematical finance . a typical approach to this problem aims at finding the trading strategy that maximizes , for example , the final expected utility , which is defined as a deterministic , concave , and increasing function @xmath5 of the fi...	we revisit merton s portfolio optimization problem under boun - ded state - dependent utility functions , in a market driven by a lvy process extending results by karatzas et . al . result we prove a _ closure property _ for integrals with respect to poisson random measures , a result of interest on its own that extend...	we revisit merton s portfolio optimization problem under boun - ded state - dependent utility functions , in a market driven by a lvy process extending results by karatzas et . al . and kunita . the problem is solved using a _ dual variational problem _ as it is customarily done for non - markovian models . one of the...
1606.05292	c	the white dwarf mass distributions from the 20 pc and sdss samples were first studied by designing monte carlo simulations with fixed standard astrophysical constraints . the good qualitative agreement between simulations and observations in figs . [ fg : f1 ] and [ fg : f4 ] confirms that the local white dwarf popula...	each of these input ingredients has a moderate effect on the predicted mass distributions , and we must also take into account biases owing to unidentified faint objects ( 20 pc sample ) , as well as unknown masses for magnetic white dwarfs and spectroscopic calibration issues ( sdss sample ) . nevertheless , we find ...	we revisit the properties and astrophysical implications of the field white dwarf mass distribution in preparation of _ gaia _ applications . our study is based on the two samples with the best established completeness and most precise atmospheric parameters , the volume - complete survey within 20 pc and the sloan di...
0910.3924	i	a precise understanding of the origin of observed neutrino masses and mixing is one of the major goals of particle physics right now . a simple paradigm for understanding the smallness of the masses is the seesaw mechanism @xcite where one introduces three standard model ( sm ) singlet right - handed ( rh ) neutrinos ...	we show that a tev scale inverse seesaw model for neutrino masses can be realized within the framework of a supersymmetric model consistent with gauge coupling unification and observed neutrino masses and mixing . we present our expectations for non - unitarity effects in the leptonic mixing matrix some of which are ob...	we show that a tev scale inverse seesaw model for neutrino masses can be realized within the framework of a supersymmetric model consistent with gauge coupling unification and observed neutrino masses and mixing . we present our expectations for non - unitarity effects in the leptonic mixing matrix some of which are ob...
1402.3347	i	electronic relaxation rates contain important information about the excitations in a metallic system . the single - particle relaxation rate , @xmath1 , determines the lifetime of quasi - particles as well as the thermal conductivity @xmath2 ; the transport relaxation rate , @xmath3 , the electrical conductivity via th...	we show that the magnon - exchange contribution to the single - particle and transport relaxation rates in ferromagnetic metals , which determine the thermal and electrical conductivity , respectively , at asymptotically low temperature does not obey a power law as previously thought , but rather shows an exponential t...	we show that the magnon - exchange contribution to the single - particle and transport relaxation rates in ferromagnetic metals , which determine the thermal and electrical conductivity , respectively , at asymptotically low temperature does not obey a power law as previously thought , but rather shows an exponential t...
1402.3347	c	to summarize our results , we have presented a very general theory of electron relaxation due to the exchange of magnons in metallic ferromagnets . the theory is valid for both itinerant ferromagnets , where the magnetization is due to the conduction electrons themselves , and for localized - moment ferromagnets , wher...	the reason is the splitting of the conduction band that inevitably results from a nonzero magnetization . at higher temperatures there is a sizable temperature window where the transport rate shows a temperature dependence , in accord with prior results . this window is separated from the asymptotic regime by a tempera...	we show that the magnon - exchange contribution to the single - particle and transport relaxation rates in ferromagnetic metals , which determine the thermal and electrical conductivity , respectively , at asymptotically low temperature does not obey a power law as previously thought , but rather shows an exponential t...
hep-th0701075	c	in this paper we studied a general class of symmetries relating partition functions of a family of classical spin models which generalises the ising model and z(2 ) lattice gauge theory . we interpreted these theories algebraically in terms of the structure constants of a vector space @xmath0 equipped with algebra and ...	the theories are interpreted algebraically in terms of the structure constants of a bidimensional vector space with algebra and coalgebra structures , and it is shown that for any change of basis in there is a related symmetry between such models . the classical kramers and wannier dualities are described as special ca...	we study a class of duality transformations in generalised z(2 ) gauge theories and ising models on two- and three - dimensional compact lattices . the theories are interpreted algebraically in terms of the structure constants of a bidimensional vector space with algebra and coalgebra structures , and it is shown that ...
0709.2926	i	we start with an informal description of the model we study in this paper . particles live in @xmath4 and evolve in discrete time . at each time , every particle is substituted by ( possibly more than one ) offspring which are placed in neighboring sites , independently of the other particles . the rules of offspring ...	we study branching random walks in random environment on the-dimensional square lattice , . in this model , the environment has finite range dependence , and the population size can not decrease . the limiting shape of this set is compact and convex , and the local size is given by a concave growth exponent . also , we...	we study branching random walks in random environment on the-dimensional square lattice , . in this model , the environment has finite range dependence , and the population size can not decrease . we prove limit theorems ( laws of large numbers ) for the set of lattice sites which are visited up to a large time as well...
cond-mat0508309	m	in this section we summarize the key elements of our cartesian - representation method for evaluating the hydrodynamic friction and mobility matrices in a suspension confined between two parallel walls . we also outline our asymptotic results , which rely on expansion of the far field flow into a hele shaw basis . the...	we have examined the crossover between several far - field asymptotic regimes corresponding to different relations between the particle separation and the distances of the particles from the walls . therefore , the far - field contributions must be included in any reliable algorithm for evaluating many - particle hydro...	we study hydrodynamic interactions of spherical particles in incident poiseuille flow in a channel with infinite planar walls . the particles are suspended in a newtonian fluid , and creeping - flow conditions are assumed . numerical results , obtained using our highly accurate cartesian - representation algorithm [ ph...
cond-mat0508309	r	we now present some characteristic examples of single- and many - particle results . we consider both the motion of freely suspended particles in the external flow ( [ parabolic flow ] ) and forces and torques on fixed particles subjected to this flow . the results for an isolated particle are obtained with the truncat...	numerical results , obtained using our highly accurate cartesian - representation algorithm [ physica a xxx , * xx * , 2005 ] , are presented for a single sphere , two spheres , and arrays of many spheres . we consider the motion of freely suspended particles as well as the forces and torques acting on particles adsorb...	we study hydrodynamic interactions of spherical particles in incident poiseuille flow in a channel with infinite planar walls . the particles are suspended in a newtonian fluid , and creeping - flow conditions are assumed . numerical results , obtained using our highly accurate cartesian - representation algorithm [ ph...
1302.6037	i	since the work of a. connes and d.k kreimer ( see @xcite , @xcite ) in perturbative quantum field theory ( pqft ) , it has been possible to have a purely algebraic interpretation of some renormalization schemes , as the birkhoff decomposition of regularized characters ( with values in a commutative algebra of laurent s...	we study in this paper logarithmic derivatives associated to derivations on graded complete lie algebra , as well as the existence of inverses . these logarithmic derivatives , when invertible , generalize the correspondence between a lie algebra and its lie group . surprisingly , one can adopt the same ideas as in pqf...	we study in this paper logarithmic derivatives associated to derivations on graded complete lie algebra , as well as the existence of inverses . these logarithmic derivatives , when invertible , generalize the correspondence between a lie algebra and its lie group . such correspondences occur naturally in the study of ...
1110.6565	i	recently , much attention has been paid to rhythms of the brain @xcite . coherence of neural oscillations may be used for efficient sensory and cognitive processing ( e.g. , feature integration , selective attention , working memory , and decision making ) @xcite . this kind of neural coherence is also correlated with ...	we study inhibitory coherence ( i.e. , collective coherence by synaptic inhibition ) in an ensemble of globally - coupled type - i neurons which can fire at arbitrarily low frequencies . heterogeneity - induced inhibitory coherence is investigated in a heterogeneous ensemble of subthreshold and suprathreshold neurons ....	we study inhibitory coherence ( i.e. , collective coherence by synaptic inhibition ) in an ensemble of globally - coupled type - i neurons which can fire at arbitrarily low frequencies . no inhibitory coherence is observed in a homogeneous ensemble composed of only subthreshold neurons ( which can not fire spontaneousl...
gr-qc0509113	c	we have obtained a number of general results . we have studied warped product @xmath0 spacetimes ( theorem 3.1 ) . we have presented the canonical form for the kundt @xmath0 metric ( theorem 4.1 ) , and studied higher dimensional kundt spacetimes in some detail . in sections 3 & 5 we have constructed higher dimensional...	we obtain a number of general results in arbitrary dimensions . we study and construct warped product spacetimes and higher - dimensional kundt spacetimes . we show how these spacetimes can be constructed from locally homogeneous spaces and spacetimes . in particular , it is plausible that for spacetimes that are not l...	we study lorentzian spacetimes for which all scalar invariants constructed from the riemann tensor and its covariant derivatives are constant ( spacetimes ) . we obtain a number of general results in arbitrary dimensions . we study and construct warped product spacetimes and higher - dimensional kundt spacetimes . we s...
1601.00273	c	in this paper we have examined the tripartite entanglement dynamics when each party is entangled with other parties initially , but they locally interact with their own markovian or non - markovian environment . first , we have considered three ghz - type initial states @xmath186 , @xmath187 , and @xmath188 . all state...	we study on the tripartite entanglement dynamics when each party is initially entangled with other parties , but they locally interact with their own markovian or non - markovian environment . the corresponding-tangles , one of the tripartite entanglement measure , are analytically computed at arbitrary time . for mark...	we study on the tripartite entanglement dynamics when each party is initially entangled with other parties , but they locally interact with their own markovian or non - markovian environment . first , we consider three ghz - type initial states , all of which have ghz symmetry provided that the parameters are chosen ap...
1106.5533	i	understanding the rates and the structure of multi - jet production in hadron hadron collisions is of primary importance for new physics searches . production of high transverse momentum jets is a hard process which implies a head - on collision of qcd partons quarks and/or gluons from the small - distance wave f...	we study production of two pairs of jets in hadron hadron collisions in view of extracting contribution of _ double hard interactions _ of three and four partons ( , ) . such interactions , in spite of being power suppressed at the level of the total cross section , become comparable with the standard hard collisions ...	we study production of two pairs of jets in hadron hadron collisions in view of extracting contribution of _ double hard interactions _ of three and four partons ( , ) . such interactions , in spite of being power suppressed at the level of the total cross section , become comparable with the standard hard collisions ...
1106.5533	c	in this work we aimed at generalization of the qcd factorization theorem to multiple parton interactions in hadron hadron collisions . such generalization is necessary for carrying out systematic studies both theoretical and experimental of the parton correlations inside hadrons , and allows one to incorporate in a ...	we find that these large- and small - distance correlations participate in different manner in 4-jet production , and treat them in the leading logarithmic approximation of pqcd that resums collinear logarithms in all orders . the framework developed here takes into systematic consideration perturbative evolution of...	we study production of two pairs of jets in hadron hadron collisions in view of extracting contribution of _ double hard interactions _ of three and four partons ( , ) . such interactions , in spite of being power suppressed at the level of the total cross section , become comparable with the standard hard collisions ...
0804.4447	i	classical cellular automata have become a standard modeling tool for complex phenomena . with their discrete time step and their intrinsically high degree of parallelization they are ideally suited for models of diverse phenomena as coffee percolation , highway traffic and oil extraction from porous media . as an abstr...	we study reversible quantum cellular automata with the restriction that these are also clifford operations . this means that tensor products of pauli operators ( or discrete weyl operators ) are mapped to tensor products of pauli operators . we characterize these symplectic cellular automata and find that all possible ...	we study reversible quantum cellular automata with the restriction that these are also clifford operations . this means that tensor products of pauli operators ( or discrete weyl operators ) are mapped to tensor products of pauli operators . therefore clifford quantum cellular automata are induced by symplectic cellula...
1008.2724	i	currently , the concept of slow - roll inflation is widely accepted by cosmologists , due to many precise observations , such as the wilkinson microwave anisotropy probe ( wmap)@xcite . we can explain all observations simply , using single field slow - roll inflation . however , future observations might detect non - s...	we study slow - roll inflation with the gauss - bonnet and chern - simons corrections . we obtain general formulas for the observables : spectral indices , tensor - to - scalar ratio and circular polarization of gravitational waves . the gauss - bonnet term violates the consistency relation . particularly , blue spectr...	we study slow - roll inflation with the gauss - bonnet and chern - simons corrections . we obtain general formulas for the observables : spectral indices , tensor - to - scalar ratio and circular polarization of gravitational waves . the gauss - bonnet term violates the consistency relation . particularly , blue spectr...
1008.2724	c	in this paper , we studied slow - roll inflation with the gauss - bonnet and chern - simons corrections . we defined three slow - roll parameters , while we used five parameters in the previous paper@xcite . we derived expressions for the scalar spectral index @xmath7 , the tensor spectral index @xmath8 , the tensor - ...	we use examples to show new - inflation - type potential with symmetry breaking scale and potential with flat region in lead to observationally consistent blue and scale invariant spectra , respectively . we show an observation of these signals supports existence of the chern - simons coupling function of .	we study slow - roll inflation with the gauss - bonnet and chern - simons corrections . we obtain general formulas for the observables : spectral indices , tensor - to - scalar ratio and circular polarization of gravitational waves . the gauss - bonnet term violates the consistency relation . particularly , blue spectr...
1501.02889	i	current cellular communication systems operate in half - duplex ( hd ) mode by transmitting and receiving either at different time slots or over different frequency bands . the system is designed in such a way that the downlink ( dl ) and uplink ( ul ) traffics are structurally separated by time division duplexing ( td...	we establish the dof gain by enabling fd operation in various configurations . as a consequence of the result , we show that the dof can approach the two - fold gain over the hd systems when the number of users becomes large enough as compared to the number of antennas at the bs . cellular network , degrees of freed...	we study the _ degrees of freedom ( dof ) _ of cellular networks in which a _ full duplex ( fd ) base station ( bs ) _ equipped with multiple transmit and receive antennas communicates with multiple mobile users . we consider two different scenarios . in the first scenario , we study the case when _ half duplex ( hd ) ...
1501.02889	c	in this paper , we have studied the sum dofs of cellular networks with a multiantenna fd bs and hd mobile users and with a multiantenna fd bs and fd mobile users . for our main contribution , we have completely characterized the sum dofs of these networks . to be specific , for achievability , the key idea was to fully...	we study the _ degrees of freedom ( dof ) _ of cellular networks in which a _ full duplex ( fd ) base station ( bs ) _ equipped with multiple transmit and receive antennas communicates with multiple mobile users . we study the case when _ half duplex ( hd ) users _ , partitioned to either the uplink ( ul ) set or the d...	we study the _ degrees of freedom ( dof ) _ of cellular networks in which a _ full duplex ( fd ) base station ( bs ) _ equipped with multiple transmit and receive antennas communicates with multiple mobile users . we consider two different scenarios . in the first scenario , we study the case when _ half duplex ( hd ) ...