article_id
stringlengths
9
15
section_id
stringclasses
5 values
document
stringlengths
503
67.8k
summary
stringlengths
205
16.2k
abstract
stringlengths
293
26.7k
cond-mat0102521
c
in this paper we have discussed the possibility of phase ordering of a sort which is dominated by strong fluctuations . in steady state , these fluctuations lead to variations of the order parameter of order unity , but the system stays ordered in the sense that with probability one , a finite fraction of the system is...
in which the order parameter has a broad distribution even in the thermodynamic limit , the distribution of particle cluster sizes decays as a power - law ( with an exponent ) , and the 2-point spatial correlation function has a cusp ( with an exponent ) at small values of the argument .
we study a new kind of phase ordering phenomenon in coarse - grained depth models of the hill - valley profile of fluctuating surfaces with zero overall tilt , and for hard - core particles sliding on such surfaces under gravity . we find that several such systems approach an ordered state with large scale fluctuations...
cond-mat0508551
i
an equation - free framework has recently been developed as a means of computationally analyzing the dynamical behavior of a large class of complex , multiscale dynamical systems . the systems may be either stochastic or deterministic with many of degrees of freedom and subject to random initial data . the key observat...
we explore situations in which certain stochastic and high - dimensional deterministic systems behave effectively as low - dimensional dynamical systems . we define and study moment maps , maps on spaces of low - order moments of evolving distributions , as a means of understanding equations - free multiscale algorithm...
we explore situations in which certain stochastic and high - dimensional deterministic systems behave effectively as low - dimensional dynamical systems . we define and study moment maps , maps on spaces of low - order moments of evolving distributions , as a means of understanding equations - free multiscale algorithm...
1312.6226
i
the wide use of gaussian and non - gaussian electromagnetic field states for various quantum tasks and protocols renders the generation and investigation of these quantum states an essential aspect of modern research . entangled states generated using both linear and nonlinear quantum optical operations have been exten...
we investigate the states generated in continuous variable ( cv ) optical fields on operating them with a number - conserving operator of the type , formed by the generalised superposition of products of field annihilation ( ) and creation ( ) operators , with . such an operator is experimentally realizable and can be ...
we investigate the states generated in continuous variable ( cv ) optical fields on operating them with a number - conserving operator of the type , formed by the generalised superposition of products of field annihilation ( ) and creation ( ) operators , with . such an operator is experimentally realizable and can be ...
1312.6226
c
in this paper , we have used a generalised superposition of products of annihilation and creation operators to obtain nonclassical continuous variable field states . we have applied the gsp operator along with linear optical interaction on single- and two - mode cv states such as coherent , thermal and squeezed states ...
this shows that nonclassical optical states generated using the above operations on classical coherent and thermal state inputs are not resourceful for cv teleportation . this investigation could prove useful in efficient implementation of noisy non - gaussian channels , formed by linear operations , in future teleport...
we investigate the states generated in continuous variable ( cv ) optical fields on operating them with a number - conserving operator of the type , formed by the generalised superposition of products of field annihilation ( ) and creation ( ) operators , with . such an operator is experimentally realizable and can be ...
astro-ph0702383
i
this study has been motivated by the apparent lack of a non - wkb analysis of alfvn waves in a multi - fluid solar wind with differentially flowing ions . to be more specific , this study is concerned with the propagation of dissipationless , hydromagnetic ( angular frequency @xmath10 well below ion gyro - frequencies ...
the propagation of dissipationless , hydromagnetic , purely toroidal alfvn waves in a realistic background three - fluid solar wind with axial symmetry and differential proton - alpha flow is investigated . the short wavelength wkb approximation is not invoked . instead , the equations that govern the wave transport ar...
the propagation of dissipationless , hydromagnetic , purely toroidal alfvn waves in a realistic background three - fluid solar wind with axial symmetry and differential proton - alpha flow is investigated . the short wavelength wkb approximation is not invoked . instead , the equations that govern the wave transport ar...
1602.02815
i
we consider the random vandermonde matrix @xmath2 , whose @xmath3-th entry is @xmath4 , where @xmath5 are independent with haar measure distribution on the unit circle . these have been studied in @xcite , @xcite , @xcite and @xcite and are of interest for applications in finance , signal array processing , wireless ...
appropriately normalized square random vandermonde matrices based on independent random variables with uniform distribution on the unit circle are studied . it is shown that as the matrix sizes increases without bound , with respect to the expectation of the trace there is an asymptotic-distribution , equal to that of ...
appropriately normalized square random vandermonde matrices based on independent random variables with uniform distribution on the unit circle are studied . it is shown that as the matrix sizes increases without bound , with respect to the expectation of the trace there is an asymptotic-distribution , equal to that of ...
math0411648
i
let @xmath0 be a complete riemannian manifold with infinite measure . the riesz transform @xmath15 on @xmath0 is the operator @xmath16 where @xmath17 is the positive laplace operator on @xmath0 . the riesz transform is always a bounded map from @xmath18 to @xmath19 . it is of interest to figure out the range of @xmath2...
let be a smooth riemannian manifold which is the union of a compact part and a finite number of euclidean ends , for some , each of which carries the standard metric . our main result is that the riesz transform on is bounded from for and unbounded for if there is more than one end . it follows from known results that ...
let be a smooth riemannian manifold which is the union of a compact part and a finite number of euclidean ends , for some , each of which carries the standard metric . our main result is that the riesz transform on is bounded from for and unbounded for if there is more than one end . it follows from known results that ...
cond-mat0210148
i
in many materials , the symmetry of the superconducting order parameter is unconventional , i.e. not @xmath8-wave . in the high-@xmath10 cuprates , it is the singlet @xmath11-wave @xcite . there is experimental evidence that , in the quasi - one - dimensional ( q1d ) organic superconductors @xmath12 @xcite , the symme...
for certain orientations of josephson junctions between two-wave or two-wave superconductors , the subgap andreev bound states produce a-periodic relation between the josephson current and the phase difference : . consequently , the ac josephson current has the fractional frequency , where is the dc voltage . in the tu...
for certain orientations of josephson junctions between two-wave or two-wave superconductors , the subgap andreev bound states produce a-periodic relation between the josephson current and the phase difference : . consequently , the ac josephson current has the fractional frequency , where is the dc voltage . in the tu...
1007.2014
i
cold atomic systems have provided an ideal playground for the experimental studies of the unitary evolution of thermally isolated quantum systems . @xcite apart from the experimental interest , studies of quantum evolution have shed light on some fundamental questions such as thermalization . @xcite a widely - studi...
we find that the area law survives at all times . adding disorder to the toric code couplings we argue that breaking the integrability with a small magnetic field could change the area law to a volume scaling as expected of thermalized states but is not sufficient for forming topological entanglement due to the presenc...
we study quantum quenches in the two - dimensional kitaev toric code model and compute exactly the time - dependent entanglement entropy of the non - equilibrium wave - function evolving from a paramagnetic initial state with the toric code hamiltonian . we find that the area law survives at all times . adding disorder...
astro-ph9907342
i
the presence of dust in galaxies has a profound impact on observable characteristics such as their apparent uv / optical / near - ir luminosity , their spectral energy distribution , their recognizable level of star - formation activity , and their morphology . in addition , dust directly affects and often controls the...
extinction and scattering properties for two types of interstellar dust , similar to those found in the average diffuse medium of the milky way galaxy ( mw ) and the bar of the small magellanic cloud ( smc ) , are considered . the examination of the models concentrates on the study of uv / visual / near - ir reddening ...
we present and discuss the results of new multiple - scattering radiative transfer calculations for three representative types of galactic environments , filled with either homogeneous or two - phase clumpy dust distributions . extinction and scattering properties for two types of interstellar dust , similar to those f...
astro-ph9907342
c
in this section we discuss which of our models with respect to geometry , optical depth , and dust type might best be used for the analysis of observations of different kinds of galaxies . in particular , we concentrate on dust attenuation studies of nearby starburst galaxies and lyman break galaxies . + + starbur...
embedded dust , especially when clumpy , leads to saturation at fairly low reddening values with correspondingly gray attenuation functions . the average far - uv attenuation factor for the calzetti sample is found to be 7.4 . the only relatively reliable measure for the uv attenuation factor for single galaxies was fo...
we present and discuss the results of new multiple - scattering radiative transfer calculations for three representative types of galactic environments , filled with either homogeneous or two - phase clumpy dust distributions . extinction and scattering properties for two types of interstellar dust , similar to those f...
astro-ph9907342
i
we have presented new multiple - scattering radiative transfer calculations for three representative types of galactic environments and two dust types , as found within the local group in the form of the average mw and smc type dust . both homogeneous and two - phase clumpy dust distributions have been explored over a ...
we present and discuss the results of new multiple - scattering radiative transfer calculations for three representative types of galactic environments , filled with either homogeneous or two - phase clumpy dust distributions . the wavelength coverage extends from 1000 to 30,000 , with particular emphasis on the res...
we present and discuss the results of new multiple - scattering radiative transfer calculations for three representative types of galactic environments , filled with either homogeneous or two - phase clumpy dust distributions . extinction and scattering properties for two types of interstellar dust , similar to those f...
0804.4520
c
as mentioned in @xmath68 , per ob1 is unusual in that it is not associated with a giant molecular cloud . based on the results described in @xmath69 , we now find that per ob1 is unusual in at least two other respects . first , most of its members exhibit a bulk motion away from the galactic plane with those at large...
we show from _ hipparcos _ data that the luminous members of this association exhibits a bulk motion away from the galactic plane , such that their average velocity increases with height above the galactic plane . the star - forming regions located at even larger heights above the galactic plane presumably correspond t...
the per ob1 association , which contains the remarkable double cluster and per , is unusual in not having a giant molecular cloud in its vicinity . we show from _ hipparcos _ data that the luminous members of this association exhibits a bulk motion away from the galactic plane , such that their average velocity incre...
0804.4520
i
the per ob1 association comprises the remarkable @xmath0 and @xmath1 per double cluster ( among the brightest and densest open clusters known ) , surrounded by luminous o / b and both early- and late - type supergiant stars . unlike virtually all other known ob associations in the galaxy , there is no known giant mol...
the per ob1 association , which contains the remarkable double cluster and per , is unusual in not having a giant molecular cloud in its vicinity . we argue that the observed motion of the luminous member stars is most naturally explained if many formed from molecular gas pushed and accelerated outwards by an expandi...
the per ob1 association , which contains the remarkable double cluster and per , is unusual in not having a giant molecular cloud in its vicinity . we show from _ hipparcos _ data that the luminous members of this association exhibits a bulk motion away from the galactic plane , such that their average velocity incre...
1008.2957
i
the epoch of reionization in hydrogen has become a topic of considerable interest ( barkana & loeb 2001 ; fan , carilli , & keating 2006 ; meiksin 2009 ; furlanetto et al . 2009 ) as a probe of the transition from neutral to ionized hydrogen in the intergalactic medium ( igm ) . this transition occurred somewhere betw...
we report ultraviolet spectra of the high - redshift ( ) quasar , he 2347 , taken by the cosmic origins spectrograph ( cos ) on the _ hubble space telescope _ ( _ hst _ ) . spectra in the g130 m ( medium - resolution , 11351440 ) and g140l ( low - resolution , 10302000 ) gratings exhibit patchy gunn - peterson abs...
we report ultraviolet spectra of the high - redshift ( ) quasar , he 2347 , taken by the cosmic origins spectrograph ( cos ) on the _ hubble space telescope _ ( _ hst _ ) . spectra in the g130 m ( medium - resolution , 11351440 ) and g140l ( low - resolution , 10302000 ) gratings exhibit patchy gunn - peterson abs...
1008.2957
r
the systemic redshift of he 2347@xmath14342 is of interest , both to fix the expected location of the edge and to infer the metagalactic radiation field from the qso proximity effect ( dallaglio , wisotzki , & worseck 2008a , b ) . a significant puzzle for this sight line is the 6 offset between the extent of stro...
the / optical - depth ratio varies ( 10100 for , and 5500 for ) on scales ( 10.8 mpc in comoving radial distance at ) , with numerous flux - transmission windows between 11351186 . the absorption extends to 1186.26 ( ) , including associated absorbers with and minimal proximity effect " of flux transmission a...
we report ultraviolet spectra of the high - redshift ( ) quasar , he 2347 , taken by the cosmic origins spectrograph ( cos ) on the _ hubble space telescope _ ( _ hst _ ) . spectra in the g130 m ( medium - resolution , 11351440 ) and g140l ( low - resolution , 10302000 ) gratings exhibit patchy gunn - peterson abs...
1504.08273
i
dwarf spheroidals ( dsphs ) are very faint galaxies ( some of the recently discovered dsph satellites of milky way are the faintest known galaxies , @xcite ) which tend to cluster around large galaxies @xcite . among the 50 or so local group dsphs discovered so far , only two ( tucana and cetus ) are relatively isolate...
using a flexible galactic model with variable stellar velocity anisotropy , i apply the classical jeans mass modeling approach to the five dwarf spheroidal galaxies with the largest homogeneous datasets of stellar line - of - sight velocities ( between 330 and 2500 stars per galaxy ) carina , fornax , leo i , sculpto...
using a flexible galactic model with variable stellar velocity anisotropy , i apply the classical jeans mass modeling approach to the five dwarf spheroidal galaxies with the largest homogeneous datasets of stellar line - of - sight velocities ( between 330 and 2500 stars per galaxy ) carina , fornax , leo i , sculpto...
1504.08273
c
i carried out the classical jeans mass modeling of the five dwarf spheroidal galaxies with the highest quality observational data carina , fornax , leo i , sculptor , and sextans . my primary goal was to push the analysis to its limits , by developing a flexible enough galactic model ( with variable stellar velocity ...
i carry out an exhaustive model parameter search , assigning absolute probabilities to each parameter combination . my main finding is that there is a well defined radius ( unique for each galaxy ) where the jeans analysis constraints on the enclosed mass are tightest , and are much better than the constraints at previ...
using a flexible galactic model with variable stellar velocity anisotropy , i apply the classical jeans mass modeling approach to the five dwarf spheroidal galaxies with the largest homogeneous datasets of stellar line - of - sight velocities ( between 330 and 2500 stars per galaxy ) carina , fornax , leo i , sculpto...
1212.1306
c
we have performed global 3d mhd simulations of turbulent accretion disks which start from fully equilibrium mhd initial conditions . the local linear theory of the mri is used as a predictor of the growth of magnetic field perturbations in the global simulations . additional tests have also been performed to compare re...
global three dimensional magnetohydrodynamic ( mhd ) simulations of turbulent accretion disks are presented which start from fully equilibrium initial conditions in which the magnetic forces are accounted for and the induction equation is satisfied . the local linear theory of the magnetorotational instability ( mri ) ...
global three dimensional magnetohydrodynamic ( mhd ) simulations of turbulent accretion disks are presented which start from fully equilibrium initial conditions in which the magnetic forces are accounted for and the induction equation is satisfied . the local linear theory of the magnetorotational instability ( mri ) ...
nucl-th0307035
i
in this work we have calculated the in - medium @xmath298 cross section within the opem taking into account the exchange pion collectivity , vertex corrections by the contact nuclear interactions and the effective masses of the nucleon and @xmath8 resonance . \(i ) we have observed that even without the effective mass ...
we present calculations of the cross section in nuclear matter within the one - pion exchange model taking into account pion collectivity , vertex renormalization by the contact nuclear interactions and dirac effective masses of the baryons due to coupling with the scalar field . introducing the dirac effective masses ...
we present calculations of the cross section in nuclear matter within the one - pion exchange model taking into account pion collectivity , vertex renormalization by the contact nuclear interactions and dirac effective masses of the baryons due to coupling with the scalar field . introducing the dirac effective masses ...
gr-qc0510111
i
there is growing concern in the numerical relativity community about the accuracy that can be achieved as robust implementations of the einstein equations become available . as has been discussed a number of times , the simulation of strongly gravitating astrophysical systems in 3d requires the stable and accurate hand...
efforts to achieve better accuracy in numerical relativity have so far focused either on implementing second order accurate adaptive mesh refinement or on defining higher order accurate differences and update schemes . here , we argue for the combination , that is a higher order accurate adaptive scheme . this combines...
efforts to achieve better accuracy in numerical relativity have so far focused either on implementing second order accurate adaptive mesh refinement or on defining higher order accurate differences and update schemes . here , we argue for the combination , that is a higher order accurate adaptive scheme . this combines...
1407.6695
i
a primary activity of the lhc program is the exploration of the properties of the higgs boson , which was discovered over two years ago by the atlas and cms collaborations @xcite . currently , only couplings to gauge bosons and third - generation fermions are measured directly @xcite . the couplings that are fixed th...
we improve the theoretical predictions for the decays of the higgs boson to an-wave vector quarkonium plus a photon by calculating the relativistic correction of order , where is the heavy - quark velocity in the quarkonium rest frame . these refinements reduce the theoretical uncertainties in the direct - production a...
we improve the theoretical predictions for the decays of the higgs boson to an-wave vector quarkonium plus a photon by calculating the relativistic correction of order , where is the heavy - quark velocity in the quarkonium rest frame . our numerical results are given for the and channels , with . the numerical results...
0805.3646
i
the muon - spin rotation ( @xmath0sr ) technique is one of the most powerful and unique tool to study the internal magnetic field distribution @xmath7 associated with the vortex lattice in type - ii superconductors ( see , e.g. refs . ) . in the vortex state for an applied magnetic field @xmath8 , or @xmath9 ( @xmath5 ...
a detailed analysis of muon - spin rotation (sr ) spectra in the vortex state of type - ii superconductors using different theoretical models is presented . analytical approximations of the london and ginzburg - landau ( gl ) models , as well as an exact solution of the gl model were used . the limits of the validity o...
a detailed analysis of muon - spin rotation (sr ) spectra in the vortex state of type - ii superconductors using different theoretical models is presented . analytical approximations of the london and ginzburg - landau ( gl ) models , as well as an exact solution of the gl model were used . the limits of the validity o...
0707.4182
i
observational cosmology has recently witnessed a tremendous increase in proficiency in the identification of galaxies at the earliest cosmic epochs . thanks in large part to the availability of large - format mosaic ccds well - suited for wide - field imaging and spectroscopic multiplexing , we are now transitioning fr...
we present a catalog of 59 -emitting galaxies spectroscopically confirmed in a campaign of keck / deimos follow - up observations to candidates selected in the large area lyman alpha ( lala ) narrow - band imaging survey . we targeted 97 candidates for spectroscopic follow - up ; by accounting for the variety of condit...
we present a catalog of 59 -emitting galaxies spectroscopically confirmed in a campaign of keck / deimos follow - up observations to candidates selected in the large area lyman alpha ( lala ) narrow - band imaging survey . we targeted 97 candidates for spectroscopic follow - up ; by accounting for the variety of condit...
0707.4182
c
together with the observations presented in paper i ( and accounting for minor overlap in the samples ) , the 59 -emitters confirmed herein bring the total catalog of spectroscopically confirmed @xmath0 -emitting galaxies to 73 objects in the @xmath3 degrees@xmath4 surveyed by the lala imaging . we now update the chara...
the 59 sources confirmed herein bring the total catalog to 73 spectroscopically confirmed -emitting galaxies in the degrees covered by the lala imaging . we find no significant evidence for luminosity function evolution from to . this result supports the conclusion that the intergalactic medium remains largely reioniz...
we present a catalog of 59 -emitting galaxies spectroscopically confirmed in a campaign of keck / deimos follow - up observations to candidates selected in the large area lyman alpha ( lala ) narrow - band imaging survey . we targeted 97 candidates for spectroscopic follow - up ; by accounting for the variety of condit...
0910.4279
c
the herschel atlas is the largest open - time key project that will be carried out with the herschel space observatory . it will survey 510 square degrees of the extragalactic sky , four times larger than all the other herschel surveys combined , in five far - infrared and submillimetre bands . we have described the su...
the herschel atlas is the largest open - time key project that will be carried out on the herschel space observatory . it will survey 510 square degrees of the extragalactic sky , four times larger than all the other herschel surveys combined , in five far - infrared and submillimetre bands . we describe the survey , t...
the herschel atlas is the largest open - time key project that will be carried out on the herschel space observatory . it will survey 510 square degrees of the extragalactic sky , four times larger than all the other herschel surveys combined , in five far - infrared and submillimetre bands . we describe the survey , t...
hep-ph0605285
i
we have studied in detail the possibility to describe the neutrino masses and mixing angles in the context of split supersymmetric scenarios where the sfermions and/or higgses are very heavy . we have considered all relevant contributions to the neutrino mass matrix up to one - loop level coming from the r - parity vio...
we investigate the possibility to generate neutrino masses in the context of split supersymmetric scenarios where all sfermions are very heavy . all relevant contributions coming from the r - parity violating terms to the neutrino mass matrix up to one - loop level are computed , showing the importance of the higgs one...
we investigate the possibility to generate neutrino masses in the context of split supersymmetric scenarios where all sfermions are very heavy . all relevant contributions coming from the r - parity violating terms to the neutrino mass matrix up to one - loop level are computed , showing the importance of the higgs one...
1410.5912
i
it is important to investigate the relationships between the power sources of galaxies ( i.e. , active galactic nuclei ( agn ) and/or starbursts ) and the chemical properties of the surrounding dense interstellar medium in order to study the effects on molecular abundances and to probe the power source with molecular l...
we present 0.8-mm band molecular images and spectra obtained with the atacama large millimeter / submillimeter array ( alma ) toward one of the nearest galaxies with an active galactic nucleus ( agn ) , ngc 1068 . we find that the abundances of shock - related molecules are more similar to abundances in hot cores and/o...
we present 0.8-mm band molecular images and spectra obtained with the atacama large millimeter / submillimeter array ( alma ) toward one of the nearest galaxies with an active galactic nucleus ( agn ) , ngc 1068 . distributions of co isotopic species (co and co ) = 32 , cn = 32 and cs = 76 are observed toward the circu...
1410.5912
c
we observed the seyfert 2 galaxy ngc 1068 with the 0.8-mm band in the cnd and starburst ring during the alma early science program . the analyses were carried out with our data obtained at 3-mm band ( paper-1 ) . the main results of this work are summarized in the following list . we successfully observed images of @xm...
distributions of co isotopic species (co and co ) = 32 , cn = 32 and cs = 76 are observed toward the circumnuclear disk ( cnd ) and a part of the starburst ring with an angular resolution of. 1. . the physical properties of these molecules and shock - related molecules such as hnco , chcn , so , and choh detected in th...
we present 0.8-mm band molecular images and spectra obtained with the atacama large millimeter / submillimeter array ( alma ) toward one of the nearest galaxies with an active galactic nucleus ( agn ) , ngc 1068 . distributions of co isotopic species (co and co ) = 32 , cn = 32 and cs = 76 are observed toward the circu...
1210.5409
i
the universal features of a large class of one - dimensional quantum models , exhibiting gapless excitations with linear spectrum , are successfully described @xcite by the tomonaga - luttinger ( tl ) liquid theory @xcite-@xcite . this theory applies to various systems , including nanowire junctions and carbon nanotube...
the boundary condition at the junction is fixed by an orthogonal matrix , which describes the splitting of the electric current among the leads . we develop a non - equilibrium bosonization procedure and compute some basic correlation functions . luttinger liquids with general anyon statistics are considered . both the...
we propose and investigate an exactly solvable model of non - equilibrium luttinger liquid on a star graph , modeling a multi - terminal quantum wire junction . the boundary condition at the junction is fixed by an orthogonal matrix , which describes the splitting of the electric current among the leads . the system is...
1210.5409
c
in this paper we constructed and investigated an exactly solvable model of a non - equilibrium luttinger junction . the basic points of our approach are : ( i ) : : a scale invariant point - like interaction , which is described by a scattering matrix @xmath0 and drives the system away from equilibrium ; ( ...
we propose and investigate an exactly solvable model of non - equilibrium luttinger liquid on a star graph , modeling a multi - terminal quantum wire junction . the system is driven away from equilibrium by connecting the leads to heat baths at different temperatures and chemical potentials . the associated non - equil...
we propose and investigate an exactly solvable model of non - equilibrium luttinger liquid on a star graph , modeling a multi - terminal quantum wire junction . the boundary condition at the junction is fixed by an orthogonal matrix , which describes the splitting of the electric current among the leads . the system is...
astro-ph0202175
i
the value of equipping telescopes with a large field of view has been recognised for some time . in 1986 the royal astronomical society report `` review of scientific priorities for uk astronomical research 19902000 '' @xcite put a wide - field multi - object spectroscopic facility at the top of its priority list for n...
the 2df ( two - degree field ) facility at the prime focus of the anglo - australian telescope provides multiple object spectroscopy over a field of view . the 2df facility began routine observations in 1997 . 2df has achieved its initial astronomical goals . we also briefly review its scientific applications and po...
the 2df ( two - degree field ) facility at the prime focus of the anglo - australian telescope provides multiple object spectroscopy over a field of view . up to 400 target fibres can be independently positioned by a complex robot . two spectrographs provide spectra with resolutions of between 500 and 2000 , over wavel...
1506.02540
i
the mathematical theory for the spread of infectious diseases has a long history and is by now quite rich ( e.g. , @xcite ) . one of the more common type of disease models is called sir ( susceptible @xmath1 infective @xmath1 recovered ) meaning that individuals are at first susceptible . if infected ( by someone ) th...
consider a large uniformly mixing dynamic population , which has constant birth rate and exponentially distributed lifetimes , with mean population size . a markovian sir ( susceptible infective recovered ) infectious disease , having importation of infectives , taking place in this population is analysed . the main si...
consider a large uniformly mixing dynamic population , which has constant birth rate and exponentially distributed lifetimes , with mean population size . a markovian sir ( susceptible infective recovered ) infectious disease , having importation of infectives , taking place in this population is analysed . the main si...
hep-ph9211304
i
effective low energy hamiltonians for non leptonic weak decays of hadrons are usually written as linear combinations of four quark operators . the coefficients of these operators , the wilson coefficient functions , can be calculated in the renormalization group improved perturbation theory , as long as the normaliza...
we calculate the two the calculation is performed in two schemes for : the dimensional regularization scheme with anticommuting ( ndr ) , and in the t hooft veltman scheme . we demonstrate how a direct calculation of diagrams involving in closed fermion loops can be avoided thus allowing a consistent calculation in t...
we calculate the two loop anomalous dimension matrix involving current current operators , qcd penguin operators , and electroweak penguin operators especially relevant for weak non leptonic decays , but also important for decays . the calculation is performed in two schemes for : the dimensional regularization sche...
hep-ph9211304
i
we have presented the details and the explicit results of the calculation of the two loop anomalous dimension matrix @xmath284 involving current - current , qcd - penguin and electroweak - penguin operators . performing the calculation in two schemes for @xmath5 , ndr and hv , we have verified the compatibility of the...
loop anomalous dimension matrix involving current current operators , qcd penguin operators , and electroweak penguin operators especially relevant for weak non leptonic decays , but also important for decays . the two loop anomalous dimension matrix , required for a consistent inclusion of electroweak penguin opera...
we calculate the two loop anomalous dimension matrix involving current current operators , qcd penguin operators , and electroweak penguin operators especially relevant for weak non leptonic decays , but also important for decays . the calculation is performed in two schemes for : the dimensional regularization sche...
1010.4504
i
the covariance graph ( aka bi - directed graph ) of a probability distribution @xmath0 is the undirected graph @xmath1 where two nodes are adjacent iff their corresponding random variables are marginally dependent in @xmath0 . covariance graphs were introduced in @xcite to represent independence models . since then , t...
the covariance graph ( aka bi - directed graph ) of a probability distribution is the undirected graph where two nodes are adjacent iff their corresponding random variables are marginally dependent in . implies that their corresponding random variables are marginally independent in . this difference in the definition i...
the covariance graph ( aka bi - directed graph ) of a probability distribution is the undirected graph where two nodes are adjacent iff their corresponding random variables are marginally dependent in . implies that their corresponding random variables are marginally independent in . this difference in the definition i...
0905.0020
i
after many years of preparation , interferometric gravitational wave ( gw ) detectors have now begun an era of long - duration observing . the three detectors of the laser interferometer gravitational - wave observatory ( ligo ) @xcite reached their design sensitivity levels in 2005 and began a `` science run '' that ...
we present the results obtained from an all - sky search for gravitational - wave ( gw ) bursts in the 642000hz frequency range in data collected by the ligo detectors during the first year ( november 2005 november 2006 ) of their fifth science run.the total analyzed livetime was 268.6 days . multiple hierarchical dat...
we present the results obtained from an all - sky search for gravitational - wave ( gw ) bursts in the 642000hz frequency range in data collected by the ligo detectors during the first year ( november 2005 november 2006 ) of their fifth science run.the total analyzed livetime was 268.6 days . multiple hierarchical dat...
cond-mat0505420
i
interactions between localized defects which are mediated by the continuum they are embedded in , play an important role in many areas of physics . typical examples are the rkky interaction between spins in a fermi liquid or the interaction between vortices in superfluids . in the present work , we discuss interactions...
the friedel oscillations of the interacting system are replaced , at long distances , by a universal casimir - type interaction which depends only on the sound velocity and decays inversely with the separation . the casimir - type interaction between localized perturbations embedded in a fermionic environment gives ris...
we discuss the effective interactions between two localized perturbations in one - dimensional ( 1d ) quantum liquids . for non - interacting fermions , the interactions exhibit friedel oscillations , giving rise to a rkky - type interaction familiar from impurity spins in metals . in the interacting case , at low ener...
astro-ph0309292
i
the spin down luminosity of a rotating pulsar powers the emission of an associated synchrotron nebula by driving an initially poynting flux - dominated wind ( the poynting - to - matter energy flux ratio is @xmath4 ) that flows along the open magnetic field lines . the density of the outflowing matter is enhanced by pa...
using relativistic , steady , axisymmetric , ideal magnetohydrodynamics ( mhd ) we analyze the super - alfvnic regime of a pulsar wind by means of solving the momentum equation along the flow as well as in the transfield direction . employing a self - similar model , we demonstrate that ideal mhd can account for the fu...
using relativistic , steady , axisymmetric , ideal magnetohydrodynamics ( mhd ) we analyze the super - alfvnic regime of a pulsar wind by means of solving the momentum equation along the flow as well as in the transfield direction . employing a self - similar model , we demonstrate that ideal mhd can account for the fu...
1402.4813
i
how do coefficients of a wave - function change at continuous quantum phase transitions ? in a given basis , this question can be addressed by monitoring the behavior of ( inverse ) participation ratios , which have a long history _ e.g. _ in localization physics @xcite . more recently , the study of related quantities...
universal features in the scalings of shannon - rnyi entropies of many - body groundstates are studied for interacting spin- systems across ( 2 + 1 ) dimensional critical points , using quantum monte carlo simulations on dimerized and plaquettized heisenberg models on the square lattice . considering both full systems ...
universal features in the scalings of shannon - rnyi entropies of many - body groundstates are studied for interacting spin- systems across ( 2 + 1 ) dimensional critical points , using quantum monte carlo simulations on dimerized and plaquettized heisenberg models on the square lattice . considering both full systems ...
1606.04889
i
on september 14 , 2015 the advanced ligo interferometer ( aligo ) detected the event gw150914 , which has been interpreted as the first direct observation of gravitational waves ( gws ) from the inspiral and merger of a pair of black holes ( bhs ; * ? ? ? * ) . the event gw150914 was produced by two bhs with masses of ...
motivated by the recent detection of gravitational waves from the black hole binary merger gw150914 , we study the dynamical evolution of ( stellar mass ) black holes in galactic nuclei where massive star clusters reside . with masses of and sizes of only a few parsecs , nuclear star clusters are the densest stellar sy...
motivated by the recent detection of gravitational waves from the black hole binary merger gw150914 , we study the dynamical evolution of ( stellar mass ) black holes in galactic nuclei where massive star clusters reside . with masses of and sizes of only a few parsecs , nuclear star clusters are the densest stellar sy...
astro-ph0203188
r
figure [ fig : comp ] shows a plot comparing the heliocentric radial velocities derived from our new optical rotation curves with the values derived from global spectra by fouqu et al . ( 1990 ) and matthews et al . overall the agreement is excellent . this agreement suggests that most extreme late - type spirals see...
the p - v curves show significant asymmetries in shape , extent , and/or amplitude on the approaching and receding sides of the disk . at least 6 of the galaxies in our sample possess semi - stellar nuclei that appear to be compact nuclear star clusters ; in 5 of these cases we see kinematic signatures in the p - v cur...
we present optical longslit spectroscopic observations of 21 low - luminosity , extreme late - type spiral galaxies . our sample is comprised of sc - sm local supercluster spirals with moderate - to - low optical surface brightnesses and with luminosities at the low end for spiral disk galaxies ( ) . for each galaxy we...
astro-ph0203188
c
we have presented new optical longslit kinematic measurements for 21 low - luminosity , extreme late - type spiral galaxies using the h@xmath1 emission line . we have derived position - velocity ( p - v ) curves for all 21 galaxies , as well as deprojected major axis rotation curves for 15 of the objects . to facilitat...
we present optical longslit spectroscopic observations of 21 low - luminosity , extreme late - type spiral galaxies . we have measured high spatial resolution position - velocity ( p - v ) curves using the h emission line , and for 15 of the galaxies we also derive major axis rotation curves . in% of our sample , final...
we present optical longslit spectroscopic observations of 21 low - luminosity , extreme late - type spiral galaxies . our sample is comprised of sc - sm local supercluster spirals with moderate - to - low optical surface brightnesses and with luminosities at the low end for spiral disk galaxies ( ) . for each galaxy we...
hep-ph0303184
i
scattering processes have played a crucial role in establishing the fundamental interactions of nature . they represent the most important source of information on short - distance physics . with increasing energy , multiparticle events are becoming more and more dominant . thus , in testing various aspects of qcd , th...
being derived with no restrictions regarding the external momenta , the method is completely general and applicable for arbitrary kinematics . in particular , it applies to the integrals in which the set of external momenta contains subsets comprised of two or more collinear momenta , which are unavoidable when calcula...
we present a systematic method for reducing an arbitrary onelooppoint massless feynman integral with generic 4dimensional momenta to a set comprised of eight fundamental scalar integrals : six box integrals in , a triangle integral in , and a general twopoint integral in space time dimensions . all the divergences pres...
hep-ph0303184
c
in this work we have considered one@xmath0loop scalar and tensor feynman integrals with an arbitrary number of external lines which are relevant for construction of multi@xmath0parton one@xmath0loop amplitudes in massless field theories . main result of this paper is a scalar reduction approach by which an arbitrary @x...
we present a systematic method for reducing an arbitrary onelooppoint massless feynman integral with generic 4dimensional momenta to a set comprised of eight fundamental scalar integrals : six box integrals in , a triangle integral in , and a general twopoint integral in space time dimensions . all the divergences pres...
we present a systematic method for reducing an arbitrary onelooppoint massless feynman integral with generic 4dimensional momenta to a set comprised of eight fundamental scalar integrals : six box integrals in , a triangle integral in , and a general twopoint integral in space time dimensions . all the divergences pres...
1608.06448
i
atomic and molecular ultracold gases offer many advantages for studying quantum phenomena , especially within the realm of many - body physics , due to the high degree of tunability of inter - atomic interactions @xcite . in particular , dipolar quantum gases of atoms and molecules have received much attention in recen...
a recent time - of - flight ( tof ) expansion experiment with polarized fermionic erbium atoms measured a fermi surface deformation from a sphere to an ellipsoid due to dipole - dipole interaction , thus confirming previous theoretical predictions . here we perform a systematic study of the ground - state properties an...
a recent time - of - flight ( tof ) expansion experiment with polarized fermionic erbium atoms measured a fermi surface deformation from a sphere to an ellipsoid due to dipole - dipole interaction , thus confirming previous theoretical predictions . here we perform a systematic study of the ground - state properties an...
1108.2719
i
m dwarfs are main sequence stars whose spectra display bands of tio and other molecules such as cah , vo , feh , and crh @xcite . the high molecular opacities are the result of a cool atmosphere with effective temperatures in the range 2400k-3700k @xcite . observed orbital motion of astrometric binaries @xcite show tha...
we present an all - sky catalog of m dwarf stars with apparent infrared magnitude j . these bright m dwarfs are all prime targets for exoplanet surveys using the doppler radial velocity or transit methods ; the combination of low - mass and bright apparent magnitude should make possible the detection of earth - size pl...
we present an all - sky catalog of m dwarf stars with apparent infrared magnitude j . the 8,889 stars are selected from the ongoing superblink survey of stars with proper motion mas yr , supplemented on the bright end with the tycho-2 catalog . completeness tests which account for kinematic ( proper motion ) bias sugge...
1108.2719
m
the superblink proper motion survey is an all - sky search for stars with large proper motions based on a re - analysis of images from the digitized sky surveys ( dss ) using a specialized image - differencing algorithm and software . the basic search method is described in @xcite . quality control procedures , includi...
the 8,889 stars are selected from the ongoing superblink survey of stars with proper motion mas yr , supplemented on the bright end with the tycho-2 catalog . our catalog is , however , significantly more complete for the northern sky (% ) than it is for the south (% ) . stars are identified as cool , red m dwarfs from...
we present an all - sky catalog of m dwarf stars with apparent infrared magnitude j . the 8,889 stars are selected from the ongoing superblink survey of stars with proper motion mas yr , supplemented on the bright end with the tycho-2 catalog . completeness tests which account for kinematic ( proper motion ) bias sugge...
1510.02860
i
a ballistic atom pump is a system containing two or more reservoirs of neutral atoms or molecules and a junction connecting them containing a time - dependent potential . `` ballistic '' means that atoms move through the pump as independent particles . the theoretical description may be given by classical , semiclassic...
we examine a classically - chaotic system consisting of two reservoirs of particles connected by a channel containing oscillating potential - energy barriers . we investigate whether such a system can preferentially pump particles from one reservoir to the other , a process often called `` quantum pumping . '' then we ...
we examine a classically - chaotic system consisting of two reservoirs of particles connected by a channel containing oscillating potential - energy barriers . we investigate whether such a system can preferentially pump particles from one reservoir to the other , a process often called `` quantum pumping . '' we show ...
1103.1910
i
_ shards _ were introduced in @xcite as a way to understand lattice congruences of the weak order on a finite coxeter group . they are defined in terms of the geometry of the associated simplicial hyperplane arrangement . the collection @xmath1 of arbitrary intersections of shards studied in @xcite , forms a lattice ...
the shard intersection order is a new lattice structure on a finite coxeter group which encodes the geometry of the reflection arrangement and the lattice theory of the weak order . in the case where is the symmetric group , we characterize shard intersections as certain pre - orders which we call permutation pre - ord...
the shard intersection order is a new lattice structure on a finite coxeter group which encodes the geometry of the reflection arrangement and the lattice theory of the weak order . in the case where is the symmetric group , we characterize shard intersections as certain pre - orders which we call permutation pre - ord...
0905.4784
i
it is now generally accepted that accretion of circumstellar disk material onto the surface of classical t tauri stars ( cttss ) is controlled by strong stellar magnetic fields ( e.g. see review by bouvier et al . cttss represent class ii sources in the classification system defined by lada ( 1987 ) . the definition is...
strong stellar magnetic fields are believed to truncate the inner accretion disks around young stars , redirecting the accreting material to the high latitude regions of the stellar surface . in the past few years , observations of strong stellar fields on t tauri currently , nothing is known about the magnetic field p...
strong stellar magnetic fields are believed to truncate the inner accretion disks around young stars , redirecting the accreting material to the high latitude regions of the stellar surface . in the past few years , observations of strong stellar fields on t tauri stars with field strengths in general agreement with th...
1701.04433
i
quantum annealing ( qa ) , the quantum counterpart of simulated annealing , is an approach for harnessing quantum mechanical effects in searching the energy landscapes of classical np - hard optimization problems @xcite . the development of a quantum annealer by _ d - wave systems _ @xcite has initiated a great deal of...
considerable progress has been made in the development of a physical quantum annealer , motivating the study of methods to enhance the efficiency of such a solver . in this work , we present a quantum annealing approach to measure similarity among molecular structures . the authors would like to thank clemens adolphs ,...
quantum annealing is a promising technique which leverages quantum mechanics to solve hard optimization problems . considerable progress has been made in the development of a physical quantum annealer , motivating the study of methods to enhance the efficiency of such a solver . in this work , we present a quantum anne...
1701.04433
c
in this work , we have studied the performance of a quantum annealer in solving instances of the molecular similarity problem utilizing a real data set . the effective use of a quantum annealer presents many challenges . here , we focused on challenges derived from encoding and decoding real - world problems . we addre...
a problem must be reformulated using minor - embedding techniques . using a real data set , we investigate the performance of a quantum annealer in solving the molecular similarity problem . although our results are limited to the problems considered here , they can be generalized to guide future benchmarking studies ....
quantum annealing is a promising technique which leverages quantum mechanics to solve hard optimization problems . considerable progress has been made in the development of a physical quantum annealer , motivating the study of methods to enhance the efficiency of such a solver . in this work , we present a quantum anne...
cs0702033
i
let @xmath0 be a finite alphabet of size @xmath1 viewed as an additive group mod @xmath1 . consider the set @xmath2 of vectors of dimension @xmath3 over @xmath0 . a vector @xmath4 will be written as a concatenation of @xmath5 blocks of length @xmath6 each , @xmath7 for a given vector @xmath4 let @xmath8 be the number o...
we derive new estimates of the size of codes and orthogonal arrays in the ordered hamming space ( the niederreiter - rosenbloom - tsfasman space ) . we also show that the eigenvalues of the ordered hamming scheme , the association scheme that describes the combinatorics of the space , are given by the multivariate kraw...
we derive new estimates of the size of codes and orthogonal arrays in the ordered hamming space ( the niederreiter - rosenbloom - tsfasman space ) . we also show that the eigenvalues of the ordered hamming scheme , the association scheme that describes the combinatorics of the space , are given by the multivariate kraw...
math0410132
i
the study of billiards on euclidean polygonal tables has benefitted greatly from the use of the theory of riemann surfaces . a classical unfolding process associates to each rational - angled polygonal table a riemann surface with holomorphic 1-form , see @xcite . using this , kerkhoff - masur - smillie @xcite showed t...
veech groups uniformize teichmller geodesic curves in riemann moduli space . recently , examples of infinitely generated veech groups have been given . we show that these can even have infinitely many cusps and infinitely many infinite ends . we further show that examples exist for which each direction of an infinite e...
veech groups uniformize teichmller geodesic curves in riemann moduli space . recently , examples of infinitely generated veech groups have been given . we show that these can even have infinitely many cusps and infinitely many infinite ends . we further show that examples exist for which each direction of an infinite e...
astro-ph0603198
i
deep irac mosaics identify infrared counterparts for 17 of 20 scuba galaxies in the cudss 14@xmath1 field . the recovery rate of scuba galaxies at 8.0 @xmath0 m is comparable to or better than that found in other counterpart surveys , once the likelihood of mistaken identifications is estimated ( three or fewer for th...
we argue that 8.0 m selection offers a better means for identifying counterparts to submillimeter galaxies than near - infrared or optical selection . based on the panchromatic seds , power - law fits to the seds suggest that five objects in the 8.0 m - selected counterpart sample harbor dominant agns ; a sixth object...
we identify 17 possible 8.0 m - selected counterparts to the submillimeter galaxies in the cudss 14 field , derived from deep imaging carried out with the irac and mips instruments aboard the _ spitzer space telescope_. ten of the 17 counterparts are not the same as those previously identified at shorter wavelengths . ...
hep-ph9709214
i
when a high - energy electron emits a soft photon via bremsstrahlung , the process occurs over a rather long distance , known as the formation length . if anything happens to an electron or a photon while traveling this distance , the emission can be disrupted . landau and pomeranchuk were the first who showed that if ...
bremsstrahlung of photons from highly relativistic electrons is investigated . the cross section of the processes , which is suppressed due to a multiple scattering of an emitting electron in dense media ( lpm effect ) and due to photon interaction with electrons of a medium , is calculated with an accuracy up to `` ne...
bremsstrahlung of photons from highly relativistic electrons is investigated . the cross section of the processes , which is suppressed due to a multiple scattering of an emitting electron in dense media ( lpm effect ) and due to photon interaction with electrons of a medium , is calculated with an accuracy up to `` ne...
math0408170
i
let @xmath17 be a prime number , @xmath0 a number field , and @xmath18 a finite set of places of @xmath0 . let @xmath19 be the compositum of all extensions of @xmath0 ( in a fixed algebraic closure @xmath20 ) which are unramified outside @xmath18 , and put @xmath21 for its galois group . these _ arithmetic fundamental ...
let be a number field , a parameter , , and $ ] a polynomial of degree . the polynomial $ ] , where is the-fold iterate of , is absolutely irreducible over ; we compute a recursion for its discriminant . let be the field obtained by adjoining to all roots ( in a fixed ) of for all ; its galois group is the iterated mon...
let be a number field , a parameter , , and $ ] a polynomial of degree . the polynomial $ ] , where is the-fold iterate of , is absolutely irreducible over ; we compute a recursion for its discriminant . let be the field obtained by adjoining to all roots ( in a fixed ) of for all ; its galois group is the iterated mon...
1501.01629
i
the density at which a particular molecular transition is excited has always been an interesting quantity for studies of molecular gas in the interstellar medium . two concepts have been developed , the critical density and the effective excitation density , to quantify the excitation density of a transition . a tradit...
the optically thin critical densities and the effective excitation densities to produce a 1 k km / s ( or jy km / s ) spectral line are tabulated for 12 commonly observed dense gas molecular tracers . the dependence of the critical density and effective excitation density on physical assumptions ( i.e. gas kinetic temp...
the optically thin critical densities and the effective excitation densities to produce a 1 k km / s ( or jy km / s ) spectral line are tabulated for 12 commonly observed dense gas molecular tracers . the dependence of the critical density and effective excitation density on physical assumptions ( i.e. gas kinetic temp...
1501.01629
i
in this tutorial , @xmath51 and are defined and their properties analyzed . the values for @xmath51 and are calculated for multiple transitions of 12 commonly observed dense molecular gas species in table 1 . inversely depends on the choice of column density and increases non - linearly as gas kinetic temperatures ar...
the use of effective excitation density has a distinct advantage over the use of critical density in characterizing the differences in density traced by species such as nh , hco , nh , and hcn as well as their isotpologues ; but , the effective excitation density has the disadvantage that it is undefined for transition...
the optically thin critical densities and the effective excitation densities to produce a 1 k km / s ( or jy km / s ) spectral line are tabulated for 12 commonly observed dense gas molecular tracers . the dependence of the critical density and effective excitation density on physical assumptions ( i.e. gas kinetic temp...
1603.07354
i
two particle correlations in high - energy collisions have played significant role to unravel qcd novel phenomena @xcite . the recent discovery of the so - called ridge phenomenon , namely di - hadron collimation in the relative azimuthal angle @xmath0 between pairs at near - side @xmath1 ( and at away - side @xmath2 )...
we investigate long range rapidity correlations of pairs of prompt photon and jet in the color glass condensate ( cgc ) framework in proton - proton and proton - nucleus collisions at rhic and the lhc . we show that photon - jet correlations exhibit long - range azimuthal collimation at near - side for low transverse m...
we investigate long range rapidity correlations of pairs of prompt photon and jet in the color glass condensate ( cgc ) framework in proton - proton and proton - nucleus collisions at rhic and the lhc . we show that photon - jet correlations exhibit long - range azimuthal collimation at near - side for low transverse m...
1001.1107
i
the formation of roche lobe overflowing x - ray binaries ( xrbs ) with black hole ( bh ) accretors in galactic fields , involves the evolution of a primordial isolated binary of which at least one of the component stars is massive enough to form a bh . right before the supernova ( sn ) explosion that will create the bh...
in black hole x - ray binaries , a misalignment between the spin axis of the black hole and the orbital angular momentum can occur during the supernova explosion that forms the compact object . in this letter we present population synthesis models of galactic black hole x - ray binaries , and study the probability dens...
in black hole x - ray binaries , a misalignment between the spin axis of the black hole and the orbital angular momentum can occur during the supernova explosion that forms the compact object . in this letter we present population synthesis models of galactic black hole x - ray binaries , and study the probability dens...
1204.1521
i
the very first picture of an inflationary multiverse scenario was proposed in ref . @xcite , in which it would seem that the author wanted to suggest a universe without the cosmological singularity problem using an interesting feature of self - reproducting or regenerating exponential expansion of the universe . a majo...
the fubini instanton describes the decay of a vacuum state under tunneling instead of rolling in the presence of a tachyonic potential . the tunneling occurs from the maximum of the potential , which is a vacuum state , to any arbitrary state , belonging to the tunneling without any barrier . the other has both the qua...
we study fubini instantons of a self - gravitating scalar field . the fubini instanton describes the decay of a vacuum state under tunneling instead of rolling in the presence of a tachyonic potential . the tunneling occurs from the maximum of the potential , which is a vacuum state , to any arbitrary state , belonging...
1407.3694
i
the problem of dynamic resource allocation in constrained queueing networks is fundamental to modern communication networks . this has long been the subject of significant research , where the @xcite of tassiulas and ephremides proposed the mw ( maximum weight ) scheduling algorithm of throughput - optimality . it has ...
since tassiulas and ephremides proposed the maximum weight scheduling algorithm of throughput - optimality for constrained queueing networks in 1992 , extensive research efforts have been made for resolving its high complexity issue under various directions . in this paper , we resolve the issue by developing a generic...
since tassiulas and ephremides proposed the maximum weight scheduling algorithm of throughput - optimality for constrained queueing networks in 1992 , extensive research efforts have been made for resolving its high complexity issue under various directions . in this paper , we resolve the issue by developing a generic...
1607.03286
i
the collection , @xmath9 , of closed subsets of a topological space @xmath10 , ordered by inclusion , forms a distributive complete lattice often referred to as the _ closed set lattice _ of @xmath10 . if a lattice @xmath11 is isomorphic to the closed set lattice of some topological space @xmath10 , we say that @xma...
given a poset , the set , , of all scott closed sets ordered by inclusion forms a complete lattice . this subcategory subsumes all currently known-faithful subcategories . with this new concept in mind , we construct the desired counterexample which relies heavily on johnstone s famous dcpo which is not sober in its sc...
given a poset , the set , , of all scott closed sets ordered by inclusion forms a complete lattice . a subcategory of ( the category of posets and scott - continuous maps ) is said to be-faithful if for any posets and in , implies . it is known that the category of all continuous dcpos and the category of bounded compl...
1607.03286
r
a nonempty subset @xmath24 of a topological space @xmath46 is called _ irreducible _ if whenever @xmath47 for closed sets @xmath27 and @xmath48 , @xmath49 or @xmath50 follows . we say that @xmath24 is _ closed irreducible _ if it is closed and irreducible . the set of all closed irreducible subsets of @xmath10 is den...
a subcategory of ( the category of posets and scott - continuous maps ) is said to be-faithful if for any posets and in , implies . it is known that the category of all continuous dcpos and the category of bounded complete dcpos are-faithful , while is not . ho & zhao ( 2009 ) asked whether the category of dcpos is-fai...
given a poset , the set , , of all scott closed sets ordered by inclusion forms a complete lattice . a subcategory of ( the category of posets and scott - continuous maps ) is said to be-faithful if for any posets and in , implies . it is known that the category of all continuous dcpos and the category of bounded compl...
1508.01409
i
in various researches and scientific activities ranging from theoretical and simulation to technological approaches , surfaces and interfaces are ubiquitous . characterization of rough surfaces is necessary through the simulation and making stochastic field for further applications . the electromagnetic and mechanical ...
the directional dependency of difference between computed results in mentioned directions are clarify . finally we systematically recognize the anisotropy direction at confidence interval using p - value approach . in order to distinguish between nature of anisotropies , after applying a typical method in determining t...
we use crossing statistics and its generalization to determine the anisotropic direction imposed on a stochastic fields indimension . this approach enables us to examine not only the rotational invariance of morphology but also we can determine the gaussianity of underlying stochastic field in various dimensions . theo...
1508.01409
m
as explained in the introduction , we are interested in finding a criterion to distinguish the isotropic and anisotropic rough surfaces , consequently , the crossing statistics method will be carried out in the @xmath0dimensional framework @xcite . this method has been used to examine cosmological stochastic fields and...
we use crossing statistics and its generalization to determine the anisotropic direction imposed on a stochastic fields indimension . this approach enables us to examine not only the rotational invariance of morphology but also we can determine the gaussianity of underlying stochastic field in various dimensions . theo...
we use crossing statistics and its generalization to determine the anisotropic direction imposed on a stochastic fields indimension . this approach enables us to examine not only the rotational invariance of morphology but also we can determine the gaussianity of underlying stochastic field in various dimensions . theo...
1508.07183
c
we present a covariant study of the light isovector meson spectrum . via various comparisons of our calculated results for mass splittings to experimental data , we investigated the role and importance of the two characteristic features of the effective interaction used herein , which are the strength of the interactio...
we discuss splittings among as well as orbital angular momentum properties of various states in detail and analyze common features of mass splittings with regard to properties of the effective interaction . in particular , we predict the mass of exotic states , and identify orbital angular momentum content in the excit...
we investigate the light quarkonium spectrum using a covariant dyson - schwinger - bethe - salpeter - equation approach to qcd . we discuss splittings among as well as orbital angular momentum properties of various states in detail and analyze common features of mass splittings with regard to properties of the effectiv...
hep-ph9907319
i
signals from supersymmetry ( susy ) are important targets for particle physics experiments . these signals range from the direct discovery of supersymmetric particles at high energy colliders to indirect signals at lower energy experiments through measurements of flavor - changing processes , magnetic and electric dipo...
such a scenario is envisioned to arise when supersymmetry breaking takes place in another world , i.e. , on another brane . the renormalization group equations exhibit a novel `` focus point '' ( as opposed to fixed point ) behavior , which allows squark and slepton masses far above their usual naturalness bounds . we ...
we discuss the phenomenology of supersymmetric models in which supersymmetry breaking terms are induced by the super - weyl anomaly . such a scenario is envisioned to arise when supersymmetry breaking takes place in another world , i.e. , on another brane . we review the anomaly - mediated framework and study in detail...
astro-ph0001501
c
we developed a continuous jet model for the radio outbursts of galactic microquasars . the model naturally explains the observed rather flat decaying lightcurves of these bursts as the signature of synchrotron radiation of relativistic particles accelerated by internal shocks in the conical jets . the comparatively lon...
we present a model for the radio outbursts of microquasars based on the assumption of quasi - continuous jet ejection . the observed comparatively flat decay light curves combined with gradually steepening spectral slopes are explained by a superposition of the radiation of the aging relativistic particle population le...
we present a model for the radio outbursts of microquasars based on the assumption of quasi - continuous jet ejection . the jets are ` lit up ' by shock fronts traveling along the jets during outbursts . the shocks accelerate relativistic particles which emit the observed synchrotron radiation . the observed comparativ...
1512.01022
i
multilevel monte carlo ( mlmc ) methods pioneered by @xcite and @xcite are now standard for estimation of expectations of functionals of processes defined by stochastic differential equations ( sdes ) . while the mlmc techniques have origins in the integral operators @xcite and sdes @xcite , they can be applied also in...
multilevel monte carlo ( mlmc ) and unbiased estimators recently proposed by mcleish ( _ monte carlo methods appl . _ , 2011 ) and rhee and glynn ( _ oper . _ , 2015 ) are closely related . new lower variance estimators are proposed , which are stratified versions of earlier unbiased schemes . under general conditions ...
multilevel monte carlo ( mlmc ) and unbiased estimators recently proposed by mcleish ( _ monte carlo methods appl . _ , 2011 ) and rhee and glynn ( _ oper . res . _ , 2015 ) are closely related . this connection is elaborated by presenting a new general class of unbiased estimators , which admits previous debiasing sch...
1512.06923
i
we work over an algebraically closed field @xmath2 of characteristic 2 . complex enriques surfaces with a finite group of automorphisms are completely classified into seven types . the main purpose of this paper is to determine which types of such enriques surfaces exist in characteristic 2 . recall that , over the com...
complex enriques surfaces with a finite group of automorphisms are classified into seven types . in this paper , we determine which types of such enriques surfaces exist in characteristic 2 . in particular we give a one dimensional family of classical and supersingular enriques surfaces with the automorphism group isom...
complex enriques surfaces with a finite group of automorphisms are classified into seven types . in this paper , we determine which types of such enriques surfaces exist in characteristic 2 . in particular we give a one dimensional family of classical and supersingular enriques surfaces with the automorphism group isom...
1407.1724
c
in this paper we study new - physics ( np ) contributions to top - quark decay . such effects can be significant only for decays that are suppressed in the sm . here we focus on @xmath0 , whose sm amplitude involves the small element @xmath11 ( @xmath12 ) of the ckm matrix . allowing for all lorentz structures , there ...
in this paper we study new - physics contributions to the top - quark decay . we find six observables that can be used to reveal the presence of new physics in . three are invariant mass - squared distributions involving two of the final - state particles in the top decay , and three are angular correlations between th...
in this paper we study new - physics contributions to the top - quark decay . we search for ways of detecting such new physics via measurements at the lhc . as top quarks are mainly produced at the lhc in production via gluon fusion , we analyze the process . we find six observables that can be used to reveal the prese...
1406.1196
i
this paper introduces a family of sorting maps on words that we call _ sweep maps_. in its simplest form , a sweep map @xmath1 uses coprime parameters @xmath2 and @xmath3 to associate a _ level _ @xmath4 to each letter @xmath5 in a word @xmath6 consisting of @xmath7 copies of the letter @xmath8 and @xmath9 copies of th...
the sweep maps give concise combinatorial formulas for the-catalan numbers , the higher-catalan numbers , the-square numbers , and many more general polynomials connected to the nabla operator and rational catalan combinatorics . we prove that many algorithms that have appeared in the literature ( including maps studie...
we define a family of maps on lattice paths , called _ sweep maps _ , that assign levels to each step in the path and sort steps according to their level . surprisingly , although sweep maps act by sorting , they appear to be bijective in general . the sweep maps give concise combinatorial formulas for the-catalan numb...
1611.00422
c
in this paper , we have presented a detailed analysis of the photometric performance of gems / gsaoi using data obtained during its science verification phase . in particular , we have focused on developing the optimal strategies for obtaining precise stellar photometry from mcao images using science based metrics to q...
we show that the psf produced by gems possesses significant spatial and temporal variability that must be accounted for during the photometric analysis by allowing the psf model a reasonably high degree of spatial variability and by treating all exposures independently . as with seeing - limited observations , we show ...
we present a detailed discussion of how to obtain precise stellar photometry in crowded fields using images obtained with multi - conjugate adaptive optics ( mcao ) , with the intent of informing the scientific development of this key technology for the extremely large telescopes . we use deep j and k exposures of ngc ...
physics0403048
i
clusters of heterogeneous materials show a much richer behavior than their homogeneous counterparts . in many bulk compounds , doping can significantly affect some global property , and alloying is a common way to tailor a completely new kind of material . at the mesoscale level , size is another complicating factor , ...
the method is applied to the more difficult case of the 38-atom cluster , for which the homogeneous clusters have a truncated octahedral shape . these trends are indeed also observed and further analysed on the 55-atom cluster . finally , we correlate the relative stability of cubic structures in these clusters to the ...
the low - energy structures of mixed ar xe and kr xe lennard - jones clusters are investigated using a newly developed parallel monte carlo minimization algorithm with specific exchange moves between particles or trajectories . tests on the 13- and 19- atom clusters show a significant improvement over the conventiona...
0809.0253
i
observations of a wide variety of astronomical objects suggests the existence of magnetic fields in relativistic environments . there have been many studies of magnetic fields emanating from differentially rotating systems . some of them confine themselves to the non - relativistic regime in which the displacement curr...
the magnetic field expands uniformly either within a cone or in all directions and it is therefore accompanied by an electric field . in the highly conducting plasma the charges move to annul the electric field in the frame of the moving plasma . the solutions presented are analytical and semi - analytical .
following prendergast we study the relativistically expanding electromagnetic fields generated by an axisymmetric explosion of magnetic energy in a small volume . the magnetic field expands uniformly either within a cone or in all directions and it is therefore accompanied by an electric field . in the highly conductin...
1602.05494
i
cluster algebras were introduced by fomin and zelevinsky in @xcite , and have since found applications across many types of mathematics . these are commutative subalgebras of @xmath0 generated by rational functions constructed using a certain combinatorial procedure starting from an initial seed which produces that se...
cluster automorphisms have been shown to have links to the mapping class groups of surfaces , maximal green sequences and to exchange graph automorphisms for skew - symmetric cluster algebras . in this paper we generalise these results to the skew - symmetrizable case by introducing a marking on the exchange graph . * ...
cluster automorphisms have been shown to have links to the mapping class groups of surfaces , maximal green sequences and to exchange graph automorphisms for skew - symmetric cluster algebras . in this paper we generalise these results to the skew - symmetrizable case by introducing a marking on the exchange graph . ma...