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cond-mat9711302
i
it is known that quenched disorder can strongly affect the large - scale , long - time behaviour of nonequilibrium driven systems with interacting constituents . the interplay of disorder , interactions and drive opens up the possibility of new regimes of complex and interesting behaviour arising in these systems @xcit...
we study the effect of quenched spatial disorder on the steady states of driven systems of interacting particles . two sorts of models are studied : disordered drop - push processes and their generalizations , and the disordered asymmetric simple exclusion process . we find that three qualitatively different regimes of...
we study the effect of quenched spatial disorder on the steady states of driven systems of interacting particles . two sorts of models are studied : disordered drop - push processes and their generalizations , and the disordered asymmetric simple exclusion process . we write down the exact steady - state measure , and ...
cond-mat9711302
c
in this paper , we have studied the stationary current - carrying states of driven lattice gas models with quenched disordered hopping rates . the principal results are of two types first the exact determination of the steady states for a class of disordered models , and second the demarcation of distinct regimes of b...
we write down the exact steady - state measure , and consequently a number of physical quantities explicitly , for the drop - push dynamics in any dimensions for arbitrary disorder . . a system with a non - zero current can either be in the homogeneous regime , chracterized by a single macroscopic density , or the segr...
we study the effect of quenched spatial disorder on the steady states of driven systems of interacting particles . two sorts of models are studied : disordered drop - push processes and their generalizations , and the disordered asymmetric simple exclusion process . we write down the exact steady - state measure , and ...
1702.03782
i
this paper concerns one - dimensional quasilinear reaction - diffusion pdes . we study the existence of monotone heteroclinic connections of traveling - wave type for reaction - diffusion equations with saturating and density - dependent diffusion , in presence of a convective term ; precisely , we deal with the equati...
we study the existence of monotone heteroclinic traveling waves for a general fisher - burgers equation with nonlinear and possibly density - dependent diffusion . we give an estimate for the critical speed ( namely , the first speed for which a monotone heteroclinic traveling wave exists ) for some different shapes of...
we study the existence of monotone heteroclinic traveling waves for a general fisher - burgers equation with nonlinear and possibly density - dependent diffusion . such a model arises , for instance , in physical phenomena where a saturation effect appears for large values of the gradient . we give an estimate for the ...
1611.05620
i
the togliatti surface in @xmath6 is the rational surface parametrized by the cubic monomials in three variables @xmath7 . it was introduced and studied by eugenio togliatti in his two articles @xcite , @xcite about rational surfaces satisfying laplace equations . the apolar system of cubics , i.e. the ideal @xmath8 gen...
we prove that they are all monomial togliatti systems , and that they are minimal if the action is defined by a diagonal matrix having on the diagonal , where is a primitive-th root of the unity . we get a complete description when is prime or a power of a prime . we also establish the relation of these systems with li...
we study the homogeneous artinian ideals of the polynomial ring $ ] generated by the homogenous polynomials of degree which are invariant under an action of the cyclic group , for any . we prove that they are all monomial togliatti systems , and that they are minimal if the action is defined by a diagonal matrix having...
hep-th0408071
i
over the latest years a great deal of work and effort has been done in the direction of understanding canonical noncommutative field theories and quantum mechanics ( see @xcite and references therein ) . the recent interest in these theories is motivated by works that establish a connection between noncommutative geome...
the investigation is carried out by means of a comparative study of the universe evolution in four different scenarios : classical commutative , classical noncommutative , quantum commutative , and quantum noncommutative , the last two employing the bohmian formalism of quantum trajectories . , we find that noncommutat...
we study the implications of a noncommutative geometry of the minisuperspace variables for the frw universe with a conformally coupled scalar field . the investigation is carried out by means of a comparative study of the universe evolution in four different scenarios : classical commutative , classical noncommutative...
hep-th0408071
c
in this work , we carried out an investigation into the role of noncommutative geometry in the cosmological scenario by introducing a noncommutative deformation in the algebra of the minisuperspace variables along the same lines proposed in @xcite and followed in @xcite . as a cosmological model to carry out such an in...
we study the implications of a noncommutative geometry of the minisuperspace variables for the frw universe with a conformally coupled scalar field . the role of noncommutativity is discussed by drawing a parallel between its realizations in two possible frameworks for physical interpretation : the nc - frame , where ...
we study the implications of a noncommutative geometry of the minisuperspace variables for the frw universe with a conformally coupled scalar field . the investigation is carried out by means of a comparative study of the universe evolution in four different scenarios : classical commutative , classical noncommutative...
cond-mat0605165
i
in monte carlo studies of statistical systems undergoing phase transitions , critical slowing down is one of the prominent problems . consider a monte carlo algorithm with dynamic exponent @xmath6 . in order to generate a given number of effectively independent samples , one has to spend computing effort @xmath7 , wher...
can be simulated by means of an embedding swendsen - wang - type cluster method . by taking into account the symmetry among loops of different colors , the numerical data strongly suggest that our cluster algorithm _ hardly _ suffers from critical slowing down . s h p [ section ] [ theorem]definition [ theore...
we study the loop model on the honeycomb lattice with real value by means of a cluster algorithm . the formulation of the algorithm is based on the equivalence of the loop model and the low - temperature graphical representation of a-color ashkin - teller model on the triangular lattice . the latter model with integer ...
cond-mat0605165
c
by making use of the equivalence of the loop configurations of the @xmath0 loop model and the low - temperature graph of the ashkin - teller model in the infinite - coupling limit ( iat ) , we formulated an embedding swendsen - wang - type algorithm for the @xmath0 loop model with real value @xmath1 . for @xmath22 , th...
the formulation of the algorithm is based on the equivalence of the loop model and the low - temperature graphical representation of a-color ashkin - teller model on the triangular lattice . the latter model with integer in particular , from quantities associated with half of the loops , we determine some critical expo...
we study the loop model on the honeycomb lattice with real value by means of a cluster algorithm . the formulation of the algorithm is based on the equivalence of the loop model and the low - temperature graphical representation of a-color ashkin - teller model on the triangular lattice . the latter model with integer ...
1204.5738
i
the physics of nano - sized metallic grains has attracted much attention following a series of experiments by ralph , black and tinkham , @xcite in which individual energy levels of ultra - small aluminum grains were resolved by single - electron - tunneling spectroscopy . recent advances have made it possible to achi...
we study the mesoscopic fluctuations of thermodynamic observables in a nanosized metallic grain in which the single - particle dynamics are chaotic and the dimensionless thouless conductance is large . such a grain is modeled by the universal hamiltonian describing the competition between exchange and pairing correlati...
we study the mesoscopic fluctuations of thermodynamic observables in a nanosized metallic grain in which the single - particle dynamics are chaotic and the dimensionless thouless conductance is large . such a grain is modeled by the universal hamiltonian describing the competition between exchange and pairing correlati...
1204.5738
c
in conclusion , we have studied the thermodynamic properties of ultra - small chaotic metallic grains with a large dimensionless thouless conductance in the presence of both superconducting and ferromagnetic correlations . we have used the so - called universal hamiltonian ( [ universal_hamiltonian ] ) as our model , i...
the exchange term is taken into account exactly by a spin - projection method , and the pairing term is treated in the static - path approximation together with small - amplitude quantal fluctuations around each static fluctuation of the pairing field . we find that the exchange interaction shifts the number - parity e...
we study the mesoscopic fluctuations of thermodynamic observables in a nanosized metallic grain in which the single - particle dynamics are chaotic and the dimensionless thouless conductance is large . such a grain is modeled by the universal hamiltonian describing the competition between exchange and pairing correlati...
1412.4839
i
the optimization of trading strategies has long been an important goal for investors in financial markets . as demonstrated in the context of a linear equilibrium model by kyle almost thirty years ago @xcite , the optimal strategy for an investor with insider information on the fundamental price of an asset is to trade...
we find that the optimal solution is front loaded for concave impact and that its expected cost is significantly lower than that of conventional strategies . we then consider brute force numerical optimization of the cost functional ; we find that the optimal solution for a buy program typically features a few short in...
we study the problem of the optimal execution of a large trade in the presence of nonlinear transient impact . we propose an approach based on homotopy analysis , whereby a well behaved initial strategy is continuously deformed to lower the expected execution cost . we find that the optimal solution is front loaded for...
1612.03098
c
in this work we developed a theory for the melting of stripe phases in two dimensional quantum systems with competing interactions of variable range , considering both quantum and thermal fluctuations . our main conclusion is that the nature of the phase transitions as a consequence of the melting process can be very d...
we find a two step disordering of the stripe phases with the growth of quantum fluctuations . critical exponents as a function of are computed at one loop order in an expansion and , whenever available , compared with known results . for finite temperatures it is found that for orientational order decays algebraically ...
we study the quantum melting of stripe phases in models with competing short range and long range interactions decaying with distance as in two space dimensions . at zero temperature we find a two step disordering of the stripe phases with the growth of quantum fluctuations . a quantum critical point separating a phase...
1508.02049
c
we have studied implications of the presence of the positive and negative correlation with the radio flux for the soft and hard x - ray fluxes , respectively , in the hard spectral state of cyg x-3 . we have found that the radio flux is then completely uncorrelated with the observed , absorbed , broad - band , 1.3100 k...
we study the radio / x - ray correlation in cyg x-3 . we show that this implies that the observed kev flux ( which is a fair approximation to the bolometric flux ) is completely uncorrelated with the radio flux . we can recover a positive correlation ( seen in other sources and expected theoretically ) if the soft x - ...
we study the radio / x - ray correlation in cyg x-3 . it has been known that the soft and hard x - ray fluxes in the hard spectral state are correlated positively and negatively , respectively , with the radio flux . we show that this implies that the observed kev flux ( which is a fair approximation to the bolometric ...
astro-ph0303098
i
the nature of the sources responsible for ionising the neutral hydrogen in the intergalactic medium ( igm ) has been the subject of a long - standing debate . there are both observational and theoretical indications that some or perhaps all of this ionising background comes from stars and not hard sources , such as qua...
we study the reionisation of the universe by stellar sources using a numerical approach that combines fast 3d radiative transfer calculations with high resolution hydrodynamical simulations . by supplementing a _ this allows us to study how dim low - mass sources , excluded in previous investigations owing to computati...
we study the reionisation of the universe by stellar sources using a numerical approach that combines fast 3d radiative transfer calculations with high resolution hydrodynamical simulations . by supplementing a _ one - step _ radiative transfer code specifically designed for following ionisation processes with an adapt...
astro-ph0303098
r
in our analysis , we carefully follow the reionisation process from a set of models parameterised by the escape fraction . in this context , the escape fraction is defined to be the fraction of ionising photons intrinsic to each source that escape and enter into the radiative transfer calculations . it must be noted he...
this result stems from the fact that low - mass sources preferentially reside in less clumpy environments than their massive counterparts . , reionisation is expected to have occurred between , although the igm remains fairly opaque until . the recent wmap measurements of the electron scattering optical depth ( acco...
we study the reionisation of the universe by stellar sources using a numerical approach that combines fast 3d radiative transfer calculations with high resolution hydrodynamical simulations . by supplementing a _ one - step _ radiative transfer code specifically designed for following ionisation processes with an adapt...
astro-ph0303098
c
we have utilised a fast radiative transfer code to study the reionisation of the universe by stellar sources . our method has been applied to a high resolution cosmological hydrodynamical simulation which enables us to probe scales previously unresolved in similar type of studies . by supplementing a _ one - step _ rad...
one - step _ radiative transfer code specifically designed for following ionisation processes with an adaptive ray - tracing algorithm , we are able to significantly speed up the calculations to the point where handling a vast number of sources becomes technically feasible . analysis of numerically converged results fo...
we study the reionisation of the universe by stellar sources using a numerical approach that combines fast 3d radiative transfer calculations with high resolution hydrodynamical simulations . by supplementing a _ one - step _ radiative transfer code specifically designed for following ionisation processes with an adapt...
1506.05548
i
in this paper we consider a directed random polymer model in random media in two ( one discrete and one continuous ) dimension introduced by oconnell and yor @xcite . for @xmath0 independent one - dimensional standard brownian motions @xmath1 and the parameter @xmath2 representing the inverse temperature , the polymer...
we study the semi - discrete directed random polymer model introduced by oconnell and yor . this measure is an extension of the probability measure of the eigenvalues for the gaussian unitary ensemble ( gue ) in random matrix theory . to establish the relation , we introduce another determinantal measure on larger degr...
we study the semi - discrete directed random polymer model introduced by oconnell and yor . we obtain a representation for the moment generating function of the polymer partition function in terms of a determinantal measure . this measure is an extension of the probability measure of the eigenvalues for the gaussian un...
1003.0056
c
we have studied the statistical nature of primordial fluctuations from an anisotropic inflation which is realized by a vector field coupled to an inflaton . first , we have classified metric fluctuations according to the 2-dimensional rotational symmetry . to choose a convenient gauge in an anisotropic universe , we ha...
we study the statistical nature of primordial fluctuations from an anisotropic inflation which is realized by a vector field coupled to an inflaton . using the canonical gauge , we reveal the structure of the couplings between curvature perturbations , vector waves , and gravitational waves . we identify two sources of...
we study the statistical nature of primordial fluctuations from an anisotropic inflation which is realized by a vector field coupled to an inflaton . we find a suitable gauge , which we call the canonical gauge , for anisotropic inflation by generalizing the flat slicing gauge in conventional isotropic inflation . usin...
1411.5222
i
surface tension of ionic solutions strongly depends on their salt composition and , in general , increases with ionic strength for low salt concentrations @xcite . wagner @xcite was the first to connect this finding with the dielectric discontinuity at the air / water interface , suggesting that dielectric image char...
the free energy is expanded to first - order in a loop expansion beyond the mean - field result . we calculate the excess surface tension and obtain analytical predictions that reunite the onsager - samaras pioneering result ( which does not agree with experimental data ) , with the ionic specificity of the hofmeister ...
we study the surface tension of ionic solutions at air / water and oil / water interfaces . by using field - theoretical methods and including a finite proximal surface - region with ionic - specific interactions . the free energy is expanded to first - order in a loop expansion beyond the mean - field result . we calc...
1411.5222
c
our work presents a general self - consistent theory for calculating free energies up to one - loop order for ionic solutions with a surface proximal layer of finite width . in this layer , we consider a slowly varying ion - specific surface potential . the loop expansion we use can be computed systematically to higher...
we study the surface tension of ionic solutions at air / water and oil / water interfaces . by using field - theoretical methods and including a finite proximal surface - region with ionic - specific interactions . our theory fits well a wide range of salt concentrations for different monovalent ions using one fit para...
we study the surface tension of ionic solutions at air / water and oil / water interfaces . by using field - theoretical methods and including a finite proximal surface - region with ionic - specific interactions . the free energy is expanded to first - order in a loop expansion beyond the mean - field result . we calc...
1104.3148
c
we have studied the complexity of the two - variable fragments of dependence logic and independence - friendly logic . we have shown ( theorem [ dtwo nexptime ] ) that both the satisfiablity and finite satisfiability problems for @xmath34are decidable , @xmath2-complete to be exact . we have also proved ( theorems [ i...
we study the two - variable fragments and of dependence logic and independence - friendly logic . we consider the satisfiability and finite satisfiability problems of these logics and show that for , both problems are-complete , whereas for , the problems areand-complete , respectively . we also show that is strictly l...
we study the two - variable fragments and of dependence logic and independence - friendly logic . we consider the satisfiability and finite satisfiability problems of these logics and show that for , both problems are-complete , whereas for , the problems areand-complete , respectively . we also show that is strictly l...
1112.5807
i
nanoscale electromechanical systems ( nems ) convert small amplitude mechanical motion into measurable electrical currents @xcite . devices based on nems have found applications as sensitive detectors of mass @xcite , force @xcite and electrical charge @xcite . considerable research efforts have been dedicated to impro...
we study theoretically dynamics in a josephson junction coupled to a mechanical resonator looking at the signatures of the resonance in d.c . electrical response of the junction . a nearby gate electrode can be used to tune the junction parameters and to excite mechanical motion . we augment theoretical estimations wit...
we study theoretically dynamics in a josephson junction coupled to a mechanical resonator looking at the signatures of the resonance in d.c . electrical response of the junction . such a system can be realized experimentally as a suspended ultra - clean carbon nanotube brought in contact with two superconducting leads ...
1201.2256
i
let @xmath0 be a stationary stochastic process of @xmath4-valued random variables with marginal distribution @xmath5 . we denote the empirical measure of order @xmath6 by @xmath7 . the classical empirical process is defined by @xmath8)-\mu((-\infty , t]))$ ] , @xmath9 . in the case of i.i.d . processes , the limit beha...
we study weak convergence of empirical processes of dependent data , indexed by classes of functions . our results are especially suitable for data arising from dynamical systems and markov chains , where the central limit theorem for partial sums of observables is commonly derived via the spectral gap technique . our ...
we study weak convergence of empirical processes of dependent data , indexed by classes of functions . our results are especially suitable for data arising from dynamical systems and markov chains , where the central limit theorem for partial sums of observables is commonly derived via the spectral gap technique . we a...
1301.7131
i
the possibility that irregular distributions of satellite galaxies may be a common feature of large galaxy halos was originally bolstered by several studies of the anisotropic distribution of our own galaxy s satellites . @xcite found that the magellanic stream along with sculptor and the draco - ursa minor stream and ...
we undertake an investigation into the spatial structure of the m31 satellite system utilizing the distance distributions presented in a previous publication . these distances make use of the unique combination of depth and spatial coverage of the pan - andromeda archaeological survey ( pandas ) to provide a large , ho...
we undertake an investigation into the spatial structure of the m31 satellite system utilizing the distance distributions presented in a previous publication . these distances make use of the unique combination of depth and spatial coverage of the pan - andromeda archaeological survey ( pandas ) to provide a large , ho...
1301.7131
c
it is clear that whilst the satellites of m31 when taken as a whole are no more planar than one can expect from a random distribution , a subset consisting of roughly half the sample _ is _ remarkably planar . the presence of this thin disk of satellites has been conspicuous throughout the analysis contained in this pa...
we find that the satellite distribution , when viewed as a whole , is no more planar than one would expect from a random distribution of equal size . a disk consisting of 15 of the satellites is however found to be highly significant , and strikingly thin , with a root - mean - square thickness of just kpc . this lopsi...
we undertake an investigation into the spatial structure of the m31 satellite system utilizing the distance distributions presented in a previous publication . these distances make use of the unique combination of depth and spatial coverage of the pan - andromeda archaeological survey ( pandas ) to provide a large , ho...
0710.0964
i
using a suite of carefully controlled 3d hydrodynamic simulations , we have investigated the ram pressure stripping of hot gas in the halos of galaxies as they fall into groups and clusters . we have proposed a physically simple analytic model that describes the stripping seen in the simulations remarkably well . this ...
we use a large suite of carefully controlled full hydrodynamic simulations to study the ram pressure stripping of the hot gaseous halos of galaxies as they fall into massive groups and clusters . the sensitivity of the results to the orbit , total galaxy mass , and galaxy structural properties is explored . for typical...
we use a large suite of carefully controlled full hydrodynamic simulations to study the ram pressure stripping of the hot gaseous halos of galaxies as they fall into massive groups and clusters . the sensitivity of the results to the orbit , total galaxy mass , and galaxy structural properties is explored . for typical...
cond-mat9607088
i
man - tailored semiconductor heterostructures @xcite offer , for the first time , the possibility to test quantum mechanics at a mesoscopic level @xcite . the scenario of systems which can be investigated is so rich that the art of their realization deserves the name of quantum design . in the simplest case , a quan...
we use an adiabatic approximation in terms of instantaneous resonances to study the steady - state and time - dependent transport properties of interacting electrons in biased resonant tunneling heterostructures . this approach leads , in a natural way , to a transport model of large applicability consisting of reservo...
we use an adiabatic approximation in terms of instantaneous resonances to study the steady - state and time - dependent transport properties of interacting electrons in biased resonant tunneling heterostructures . this approach leads , in a natural way , to a transport model of large applicability consisting of reservo...
1409.2529
c
we have proposed to use the natural concept of homotopy theory to extend the results from @xmath3-theory ( and the intermediate step of considering isomorphism classes of vector bundles ) to the non - stable regime , which includes _ all _ insulators independent of the number of occupied / empty bands . we showed that ...
we use homotopy theory to extend the notion of strong and weak topological insulators to the non - stable regime ( low numbers of occupied / empty energy bands ) . additionally , we prove some useful technical results , including the homotopy theoretic derivation of the factorization of invariants over the torus into i...
we use homotopy theory to extend the notion of strong and weak topological insulators to the non - stable regime ( low numbers of occupied / empty energy bands ) . we show that for strong topological insulators in spatial dimensions to be `` truly-dimensional '' , i.e. not realizable by stacking lower - dimensional ins...
1410.8329
i
fix the nonnegative integer @xmath2 and let @xmath3 be the grassmannian which parametrizes isotropic subspaces of dimension @xmath4 in the vector space @xmath5 , equipped with a symplectic form . in 2008 , buch , kresch , and tamvakis @xcite introduced the theta polynomials @xmath6 , a family of polynomials in independ...
we use young s raising operators to introduce and study _ double theta polynomials _ , which specialize to both the theta polynomials of buch , kresch , and tamvakis , and to double ( or factorial ) schur-polynomials and-polynomials . these double theta polynomials give giambelli formulas which represent the equivarian...
we use young s raising operators to introduce and study _ double theta polynomials _ , which specialize to both the theta polynomials of buch , kresch , and tamvakis , and to double ( or factorial ) schur-polynomials and-polynomials . these double theta polynomials give giambelli formulas which represent the equivarian...
astro-ph9809056
i
in this paper we have presented new hst / wfpc2 images of 11 high redshift radio galaxies , all complemented with vla radio maps of comparable resolution . the images reveal a wide variety in the morphology of the host galaxies of these high redshift radio sources : in particular most objects have a clumpy , irregular ...
we present the images overlayed on vla radio maps of comparable resolution . we find that on the scale of the hst observations there is a wide variety of morphological structures of the hosting galaxies : most objects have a clumpy , irregular appearance , consisting of a bright nucleus and a number of smaller componen...
with the hubble space telescope we have obtained images of 9 of the most distant radio galaxies . the galaxies , which have redshifts between and , were observed with the wfpc2 camera in a broad band filter ( f606w or f707w , roughly equivalent to v or r - band ) , corresponding to the near ultraviolet emission in the ...
hep-ph0107200
c
for the example of @xmath1-theory we have shown that self - consistent dyson resummations based on a @xmath0-derivable scheme can be renormalized with local counter terms defined on the self - consistently determined vacuum level . this result was obtained with help of weinberg s power counting theorem and using the bp...
within finite temperature field theory , we show that truncated non - perturbative self - consistent dyson resummation schemes can be renormalized with local counter terms defined at the vacuum level . this guarantees the standard-derivable properties like thermodynamic consistency and exact conservation laws also for ...
within finite temperature field theory , we show that truncated non - perturbative self - consistent dyson resummation schemes can be renormalized with local counter terms defined at the vacuum level . the requirements are that the underlying theory is renormalizable and that the self - consistent scheme follows baym s...
1510.02896
i
let @xmath1 be a 3-manifold with positive ricci curvature . in this paper we obtain quantitative results about sweepouts of @xmath1 by 1-cycles and surfaces . [ main_cycle ] every closed 3-manifold @xmath1 of positive ricci curvature admits a map @xmath5 with fibers of length at most @xmath6 for a universal constant @x...
* abstract : * we prove that given a three manifold with an arbitrary metric of positive ricci curvature , there exists a sweepout of by surfaces of genus and areas bounded by . we use this result to construct a sweepout of by 1-cycles of length at most , giving a partial answer to a question of l. guth . the sweepo...
* abstract : * we prove that given a three manifold with an arbitrary metric of positive ricci curvature , there exists a sweepout of by surfaces of genus and areas bounded by . we use this result to construct a sweepout of by 1-cycles of length at most , giving a partial answer to a question of l. guth . the sweepo...
1408.4407
i
the classical and pioneering works in the field of stellar physics include dynamics of supernova explosion by baade @xmath5 zwicky @xcite , energy production in stars and stellar evolution by bethe @xcite , and , synthesis of elements in stars by burbidge et al . since then the microphysics of supernova explosion has c...
-decay and positron decay are believed to play a consequential role during the late phases of stellar evolution of a massive star culminating in a supernova explosion . the-decay contributes in maintaining a respectable lepton - to - baryon ratio , , of the core prior to collapse which results in a larger shock energy ...
-decay and positron decay are believed to play a consequential role during the late phases of stellar evolution of a massive star culminating in a supernova explosion . the-decay contributes in maintaining a respectable lepton - to - baryon ratio , , of the core prior to collapse which results in a larger shock energy ...
1408.4407
r
the improved pn - qrpa model , as described in the previous section , was used to calculate the gt@xmath6 strength distributions of iron isotopes in astrophysical conditions . the model incorporated experimental excitation energies , log@xmath33 values and deformations as discussed earlier . the gt strength distributio...
excited state gamow - teller distributions are much different from ground state and a microscopic calculation of decay rates from these excited states greatly increases the reliability of the total decay rate calculation specially during the late stages of stellar evolution . the reported decay rates are also compared ...
-decay and positron decay are believed to play a consequential role during the late phases of stellar evolution of a massive star culminating in a supernova explosion . the-decay contributes in maintaining a respectable lepton - to - baryon ratio , , of the core prior to collapse which results in a larger shock energy ...
1610.00814
i
let @xmath2 be a continuous endomorphism , and @xmath3 be a non - degenerate interval on the real line . let @xmath4 be an @xmath0th iteration of @xmath5 . a point @xmath6 is called a periodic point of @xmath5 with period @xmath7 if @xmath8 , @xmath9 for @xmath10 . the set of @xmath7 distinct points @xmath11 is called ...
[ sec : abstract ] this paper introduces the notion of second minimal-periodic orbit of the continuous map on the interval according as if is a successor of the minimal period of the map in sharkovski ordering . we pursue classification of second minimal-orbits in terms of cyclic permutations and digraphs . it is prove...
[ sec : abstract ] this paper introduces the notion of second minimal-periodic orbit of the continuous map on the interval according as if is a successor of the minimal period of the map in sharkovski ordering . we pursue classification of second minimal-orbits in terms of cyclic permutations and digraphs . it is prove...
cond-mat0110467
c
to conclude , we have implemented a field theoretic scheme to explore the structure of the dos close to the edge of the support of two linear non - hermitian operators describing a quantum particle subject to a random imaginary scalar and an imaginary vector potential . in doing so , we have provided a general scheme f...
_ a statistical field theory is developed to explore the density of states and spatial profile of ` tail states ' at the edge of the spectral support of a general class of disordered non - hermitian operators . these states , which are identified with symmetry broken , instanton field configurations of the theory , are...
_ a statistical field theory is developed to explore the density of states and spatial profile of ` tail states ' at the edge of the spectral support of a general class of disordered non - hermitian operators . these states , which are identified with symmetry broken , instanton field configurations of the theory , are...
astro-ph0201317
i
[ se29:intro ] a rich chemical and physical interplay exists between gas and grains in which molecules are formed on grains , creating ice mantles that are preserved in environments ranging from quiescent dense molecular clouds to envelopes and disks around protostars . various processes , among which are bombardmen...
a ( sub-)millimeter line and continuum study of the class i protostar elias 29 in the ophiuchi molecular cloud is presented , whose goals are to understand the nature of this source , and to locate the ices that are abundantly present along this line of sight . within 1560 beams , several different components contribut...
a ( sub-)millimeter line and continuum study of the class i protostar elias 29 in the ophiuchi molecular cloud is presented , whose goals are to understand the nature of this source , and to locate the ices that are abundantly present along this line of sight . within 1560 beams , several different components contribut...
astro-ph0201317
r
the single dish maps show that elias 29 is not a particularly prominent center of molecular line emission . within a radius of @xmath37 , the @xmath2 3 - 2 and @xmath31 2 - 1 emission is highly structured , and quite differently distributed ( figs . [ f : hcop ] and [ f : csochan ] ) . [ f : hcop ] [ f : csoch...
the disk is in a relatively face - on orientation ( ) , which explains many of the remarkable observational features of elias 29 , such as its flat sed , its brightness in the near infrared , the extended components found in speckle interferometry observations , and its high velocity molecular outflow .
a ( sub-)millimeter line and continuum study of the class i protostar elias 29 in the ophiuchi molecular cloud is presented , whose goals are to understand the nature of this source , and to locate the ices that are abundantly present along this line of sight . within 1560 beams , several different components contribut...
astro-ph0201317
i
we have analyzed infrared and millimeter wave line and continuum observations to construct a model of the class i protostar elias 29 and its environment . this model has to contain a number of different components ( summarized in fig . [ f : schem ] ) : a disk to account for the @xmath5250 @xmath20 sed , an envelope c...
this explains the observed absence of thermally processed ices ( crystallized ho ) toward elias 29 . nevertheless , the temperatures could be sufficiently high to account for the low abundance of apolar ( co , n , o ) ices . this work shows that it is crucial to obtain spectrally and spatially resolved information from...
a ( sub-)millimeter line and continuum study of the class i protostar elias 29 in the ophiuchi molecular cloud is presented , whose goals are to understand the nature of this source , and to locate the ices that are abundantly present along this line of sight . within 1560 beams , several different components contribut...
1612.08057
i
let @xmath0 be a simple and undirected graph . a subset @xmath15 is an _ independent set _ , respectively , a _ clique _ if no two , respectively , every two vertices of @xmath16 are adjacent . the complete graph with @xmath17 vertices is denoted by @xmath18 . the path and cycle with @xmath17 vertices of length @xmath1...
the complete width of is the minimum such that there exist independent sets , , such that the graph obtained from by adding some new edges between certain vertices inside the sets , , is a complete graph . the complete width problem is to decide whether the complete width of a given graph is at most or not . in this pa...
a complete graph is the graph in which every two vertices are adjacent . for a graph , the complete width of is the minimum such that there exist independent sets , , such that the graph obtained from by adding some new edges between certain vertices inside the sets , , is a complete graph . the complete width problem ...
cs0405077
i
dynamic systems with many interacting components are encountered in areas ranging from econometric modeling to communications to material science . individual components and their local interactions may or may not be complex , but their mere multiplicity often creates a complexity which needs to be addressed . as an...
a computer simulation has to be fast to be helpful , if it is employed to study the behavior of a multicomponent dynamic system . this paper discusses modeling concepts and algorithmic techniques useful for creating such fast simulations . concrete examples of simulations that range from econometric modeling to communi...
a computer simulation has to be fast to be helpful , if it is employed to study the behavior of a multicomponent dynamic system . this paper discusses modeling concepts and algorithmic techniques useful for creating such fast simulations . concrete examples of simulations that range from econometric modeling to communi...
0909.1276
i
the understanding of the structure of nuclei far from stability with extreme isospin is one the most exciting challenges of present nuclear physics . new experimental facilities with radioactive nuclear beams make it possible to investigate the nuclear chart to the very limits of nuclear binding . a wealth of structure...
both methods are in principle exact , but landau - migdal theory can not describe ground state properties and density functional theory does not take into account the energy dependence of the self - energy and therefore fails to yield proper single - particle spectra as well as the coupling to complex configurations in...
a consistent combination of covariant density functional theory ( cdft ) and landau - migdal theory of finite fermi systems ( tffs ) is presented . both methods are in principle exact , but landau - migdal theory can not describe ground state properties and density functional theory does not take into account the energ...
math0510204
i
there has been new and encouraging evidence that the language and methods of the theory of groupoids , after being successfully applied in other major mathematical fields , offer new insights and perspectives for applications in combinatorics and discrete and computational geometry . the groupoids ( groups of projectiv...
a foundation is laid for a theory of _ combinatorial groupoids _ , allowing us to use concepts like `` holonomy '' , `` parallel transport '' , `` bundles '' , `` combinatorial curvature '' etc . in the context of simplicial ( polyhedral ) complexes , posets , graphs , polytopes and other combinatorial objects . a new...
a foundation is laid for a theory of _ combinatorial groupoids _ , allowing us to use concepts like `` holonomy '' , `` parallel transport '' , `` bundles '' , `` combinatorial curvature '' etc . in the context of simplicial ( polyhedral ) complexes , posets , graphs , polytopes and other combinatorial objects . a new...
0710.3572
i
semiconductor based concepts for quantum information processing promise a high degree of scalability . however , the implementation of even a single qubit proves to be more difficult in semiconductors than in alternative approaches . @xcite the reasons lie in the short decoherence times and strong interactions between ...
we have developed a two - particle green s function method of open systems and calculate the properties of three - dimensional interacting entangled systems non - perturbatively . we present concrete device designs and detailed , charge self - consistent predictions . one of the qubits is an all - electric mach - zehnd...
a gaas / algaas based two - qubit quantum device that allows the controlled generation and straightforward detection of entanglement by measuring a stationary current - voltage characteristic is proposed . we have developed a two - particle green s function method of open systems and calculate the properties of three -...
0710.3572
c
we have theoretically analyzed semiconductor single- and two - qubit quantum gates based on electrostatically defined qwrs and quantum dots . we predict the detailed three - dimensional geometry , material composition , doping profile , and bias voltage of an all - electric mach - zehnder interferometer . our calculati...
a gaas / algaas based two - qubit quantum device that allows the controlled generation and straightforward detection of entanglement by measuring a stationary current - voltage characteristic is proposed . we find that the entanglement of the device can be controlled externally by tuning the tunneling coupling between ...
a gaas / algaas based two - qubit quantum device that allows the controlled generation and straightforward detection of entanglement by measuring a stationary current - voltage characteristic is proposed . we have developed a two - particle green s function method of open systems and calculate the properties of three -...
1110.1452
i
a model was developed for the excitation of the uibs by h atom impacts in the interstellar medium . it builds upon the fact that , in the presence of far uv radiation and hydrocarbon grains , the hydrogen gas will be partially dissociated and the grain surface will be partially hydrogenated and partially covered with f...
a model was developed for the excitation of the uibs by h atom impacts in the interstellar medium . it builds upon the fact that , in the presence of far uv radiation and hydrocarbon grains , the hydrogen gas will be partially dissociated and the grain surface will be partially hydrogenated and partially covered with f...
a model was developed for the excitation of the uibs by h atom impacts in the interstellar medium . it builds upon the fact that , in the presence of far uv radiation and hydrocarbon grains , the hydrogen gas will be partially dissociated and the grain surface will be partially hydrogenated and partially covered with f...
astro-ph9612152
i
uit fuv images and derived stellar photometry for most of the bar of the smc are presented . the uv morphology of the smc s bar shows four concentrations of uv - bright stars spread from northeast to southwest at nearly equal ( @xmath130 arcmin ) spacings . one of the concentrations , near dem 55 , appears as a well - ...
a mosaic of four uit far - uv ( fuv ) ( = 1620 ) images , with derived stellar and hii region photometry , is presented for most of the bar of the smc . the uv morphology of the smc s bar shows that recent star formation there has left striking features including : a ) four concentrations of uv - bright stars spread...
a mosaic of four uit far - uv ( fuv ) ( = 1620 ) images , with derived stellar and hii region photometry , is presented for most of the bar of the smc . the uv morphology of the smc s bar shows that recent star formation there has left striking features including : a ) four concentrations of uv - bright stars spread...
1212.3446
c
instrumental distortion of the total intensity profile introduces significant systematic timing errors that are correlated between pulsars observed with the same instrument . therefore , high - fidelity polarimetry is inextricably linked with the long - term objectives of high - precision timing and the primary goals o...
a new method of polarimetric calibration is presented in which the instrumental response is derived from regular observations of psrj0437 based on the assumption that the mean polarized emission from this millisecond pulsar remains constant over time . application of the new technique followed by arrival time estimatio...
a new method of polarimetric calibration is presented in which the instrumental response is derived from regular observations of psrj0437 based on the assumption that the mean polarized emission from this millisecond pulsar remains constant over time . the technique is applicable to any experiment in which high - fidel...
hep-th9903259
i
it has been proposed @xcite that supergravity ( and string theory ) on @xmath6 times a compact manifold is equivalent to a conformal field theory living on the boundary of @xmath6 . supergravity ( and string theory ) on asymptotically @xmath6 space - time is also expected @xcite to be realized by a boundary field theor...
a quantization of-dimensional gravity with negative cosmological constant is presented and quantum aspects of the-dimensional black holes are studied thereby . the quantization consists of two procedures . one is related with quantization of the asymptotic virasoro symmetry . a notion of the virasoro deformation of-geo...
a quantization of-dimensional gravity with negative cosmological constant is presented and quantum aspects of the-dimensional black holes are studied thereby . the quantization consists of two procedures . one is related with quantization of the asymptotic virasoro symmetry . a notion of the virasoro deformation of-geo...
1401.7939
i
the ability to store a quantum state over long times is a desirable feature in many quantum information protocols . in the optical domain , quantum memories ( qm ) are necessary to implement the quantum repeaters needed for future long - distance quantum networks , and are the object of active research @xcite . quantu...
a quantum memory at microwave frequencies , able to store the state of multiple superconducting qubits for long times , is a key element for quantum information processing . electronic and nuclear spins are natural candidates for the storage medium as their coherence time can be well above one second . benefiting from ...
a quantum memory at microwave frequencies , able to store the state of multiple superconducting qubits for long times , is a key element for quantum information processing . electronic and nuclear spins are natural candidates for the storage medium as their coherence time can be well above one second . benefiting from ...
1502.06562
i
glass transition on surface / interface / thin film has drawn intensive interests in the last two decades for two reasons . firstly , the importance of surface and thin film in materials science and engineering requires a better understanding of its dynamic and thermodynamic properties . secondly , the confined geometr...
a quasi 2-dimensional recursive lattice formed by planar elements have been designed to investigate the surface thermodynamics of ising spin glass system with the aim to study the metastability of supercooled liquids and the ideal glass transition . the recursive properties of the lattices were adopted to achieve exact...
a quasi 2-dimensional recursive lattice formed by planar elements have been designed to investigate the surface thermodynamics of ising spin glass system with the aim to study the metastability of supercooled liquids and the ideal glass transition . the lattice is constructed as a hybrid of partial husimi lattice repre...
1311.3818
i
the deformation properties of bulk metallic glasses are characterised by two temperature regimes @xcite . at high temperatures , close to the glass transition temperature , bmgs deform homogeneously with the strain rate properties being reasonably well understood by thermally activated plastic flow . at lower temperat...
2013 , doi : 10.1080/14786435.2013.826396 ) which uses a distribution of barrier energies and some aspects of under - cooled liquid physics is developed further . in particular , a log - normal distribution is now employed to describe the statistics of barrier energies . a high temperature mean - field description of h...
a thermal activation model to describe the plasticity of bulk metallic glasses ( derlet and maa , phil . mag . 2013 , doi : 10.1080/14786435.2013.826396 ) which uses a distribution of barrier energies and some aspects of under - cooled liquid physics is developed further . in particular , a log - normal distribution is...
astro-ph0407270
i
[ sec : intro ] among the suite of molecules observed in interstellar and circum - protostellar media , methane is relatively poorly studied . ch@xmath1 has no permanent dipole moment , and therefore can not be observed by pure rotational transitions at radio wavelengths . its strongest fundamental ( @xmath8 ) ro - ...
it is concluded that the gas phase ch abundance varies by an order of magnitude in this line of sight : it is low in the envelope and the outflow ( x[ch] ) , and at least a factor of 10 larger in the central core . the discovery of solid ch in independent ground and space based data sets shows that methane is nearly en...
absorption and emission lines originating from the c - h stretching manifold of gas phase ch were discovered in the high resolution (=25,000 ) infrared l band spectrum along the line of sight toward ngc 7538 : irs9 . these observations provide a diagnostic of the complex dynamics and chemistry in a massive star forming...
astro-ph0407270
c
[ sec : disc ] [ t : col ] lllccccl species & location@xmath65 & phase@xmath66 & @xmath104&@xmath105 & @xmath106 & @xmath107@xmath108 & notes + & & & @xmath4 & k & @xmath109 @xmath48 & 10@xmath110 & + ch@xmath1 & outflow & gas / abs . & @xmath2216 & 270 & @xmath111 & @xmath112 & assumed @xmath80 + ch@xmath1 & c...
absorption and emission lines originating from the c - h stretching manifold of gas phase ch were discovered in the high resolution (=25,000 ) infrared l band spectrum along the line of sight toward ngc 7538 : irs9 . the line shapes resemble p cygni profiles with the absorption and emission components shifted by with ...
absorption and emission lines originating from the c - h stretching manifold of gas phase ch were discovered in the high resolution (=25,000 ) infrared l band spectrum along the line of sight toward ngc 7538 : irs9 . these observations provide a diagnostic of the complex dynamics and chemistry in a massive star forming...
astro-ph0407270
c
[ sec : concl ] using high resolution l and m band spectroscopy we have shown that the gas phase ch@xmath1 abundance varies considerably in the line of sight of the massive protostar ngc 7538 : irs9 . this is a result of specific molecule formation and destruction processes : ch@xmath1 is formed on grain surfaces an...
these observations provide a diagnostic of the complex dynamics and chemistry in a massive star forming region . it thus appears that ch is formed by grain surface reactions , evaporates into the gas phase in the warm inner regions of protostellar cores and is efficiently destroyed in shocks related to outflows .
absorption and emission lines originating from the c - h stretching manifold of gas phase ch were discovered in the high resolution (=25,000 ) infrared l band spectrum along the line of sight toward ngc 7538 : irs9 . these observations provide a diagnostic of the complex dynamics and chemistry in a massive star forming...
1107.0678
i
according to recent models , the accretion disk and the bh in agns are surrounded by a clumpy torus , with its inner radius governed by the dust sublimation process . regarding the inner radius of the torus , there was a systematic deviation between the observational results and the theory . in paper i , we showed that...
according to recent models , the accretion disk and black hole in active galactic nuclei are surrounded by a clumpy torus . we investigate the nir flux variation of the torus in response to a uv flash for various geometries . both the waning effect of each clump and the torus self - occultation selectively reduce the e...
according to recent models , the accretion disk and black hole in active galactic nuclei are surrounded by a clumpy torus . we investigate the nir flux variation of the torus in response to a uv flash for various geometries . anisotropic illumination by the disk and the torus self - occultation contrast our study with ...
0801.2068
c
the mass values and the corresponding nuclear binding energies represent the underlying forces acting in a nucleus . in analogy to the ionization potential of atoms , plots of separation energies for the removal of two protons , @xmath272 or two neutrons , @xmath273 reveal the details of nuclear shell structure . in th...
the masses of , , , , , , , , , , , and were determined . the resulting separation energies are discussed and the mass spectrometric and laser spectroscopic data are examined for possible correlations . , , , , , , , , , and atomic mass , binding energy , penning trap , radionuclide , isom...
accurate atomic mass measurements of neutron - deficient and neutron - rich nuclides around the doubly - magic and of neutron - rich cesium isotopes were performed with the penning trap mass spectrometer isoltrap at isolde / cern . the masses of , , , , , , , , , , , and were determined . the obtained relative mass unc...
1302.5234
i
despite of the simplicity of the molecular ion h@xmath0 and its isotopomers d@xmath0 and t@xmath0 , the three body schrdinger equation can not be solved exactly . however , high precision results , for energies and wave functions , have been obtained using different approaches . for the particular case of the deuterium...
after the study of the three body molecular system h ( _ j . phys . opt . phys . _ * 45 * 065101 ) , its isotopomer , the deuterium molecular ion d is studied . the three - body schrdinger equation is solved using the lagrange - mesh method in perimetric coordinates .
after the study of the three body molecular system h ( _ j . phys . b : at . mol . opt . phys . _ * 45 * 065101 ) , its isotopomer , the deuterium molecular ion d is studied . the three - body schrdinger equation is solved using the lagrange - mesh method in perimetric coordinates . energies and wave functions for four...
gr-qc0311018
i
the description of the motion of binary black holes within the einsteinian theory of gravity is quite a challenging problem and is likely to be finally solvable by numerical means only . however , it seems that the full success will occur in a far future . it has turned out in the past that analytical developments did ...
an approximate analytical and non - linear solution of the einstein field equations is derived for a system of multiple non - rotating black holes . the associated space - time has the same asymptotic structure as the brill - lindquist initial data solution for multiple black holes . _ approximate solution of the einst...
an approximate analytical and non - linear solution of the einstein field equations is derived for a system of multiple non - rotating black holes . the associated space - time has the same asymptotic structure as the brill - lindquist initial data solution for multiple black holes . the system admits an arnowitt - des...
1505.00708
i
in some solids thermal energy can be transmitted by the mechanism of _ wave - like _ propagation of heat , unlike the usual mechanism of conduction by diffusion . this phenomenon of heat conduction as waves , known as _ second sound _ , has been observed experimentally ( see , for example , @xcite for an extensive surv...
the non - classical theory incorporates three models ; the classical theory based on fourier s law of heat conduction resulting in a hyperbolic - parabolic coupled system , a non - classical theory of a fully hyperbolic extension , and a combination of the two . a number of numerical examples are presented to demonstra...
an efficient time - stepping algorithm is proposed based on operator - splitting and the space - time discontinuous galerkin finite element method for problems in the non - classical theory of thermoelasticity . the non - classical theory incorporates three models ; the classical theory based on fourier s law of heat c...
1505.00708
c
an operator - splitting strategy coupled with a space - time discontinuous galerkin finite element method for the solution of transient and fully coupled initial - boundary problem of generalized thermoelasticity was presented . well - posdeness of the problem in the general setting ( type iii ) is proven using the the...
an efficient time - stepping algorithm is proposed based on operator - splitting and the space - time discontinuous galerkin finite element method for problems in the non - classical theory of thermoelasticity . each sub - problem is discretised using space - time discontinuous galerkin finite element method resulting ...
an efficient time - stepping algorithm is proposed based on operator - splitting and the space - time discontinuous galerkin finite element method for problems in the non - classical theory of thermoelasticity . the non - classical theory incorporates three models ; the classical theory based on fourier s law of heat c...
1403.1130
i
let @xmath0 be a coxeter group . an element @xmath1 is said to be fully commutative ( fc ) if any reduced word for @xmath2 can be obtained from any other one by only short braid relations . these elements were introduced and studied independently by fan in @xcite , graham in @xcite and stembridge in @xcite , where amon...
these elements were studied by boothby _ et al_. in particular the authors enumerated cyclically fully commutative elements in all coxeter groups having a finite number of them . in this work we characterize and enumerate cyclically fully commutative elements according to their coxeter length in all finite or affine co...
an element of a coxeter group is fully commutative if any two of its reduced decompositions are related by a series of transpositions of adjacent commuting generators . an element of a coxeter group is cyclically fully commutative if any of its cyclic shifts remains fully commutative . these elements were studied by bo...
1106.3424
i
the zero - temperature random - field ising model ( zt - rfim ) is a prototype model for systems that exhibit avalanche dynamics when slowly driven accross athermal first - order phase transitions @xcite . examples of such transitions include the condensation of fluids in porous media @xcite , the martensitic transfo...
separated from the intrinsic topological length scale of the bethe lattice is shown to diverge as a power law at the critical point . the critical exponents governing the behaviour of the correlation length are consistent with the mean - field values found for a hypercubic lattice with dimension greater than the upper ...
an exact expression for the spin - spin correlation function is derived for the zero - temperature random - field ising model defined on a bethe lattice of arbitrary coordination number . the correlation length describing dynamic spin - spin correlations and separated from the intrinsic topological length scale of the ...
hep-th0308052
i
in a recent paper @xcite simple theorems pertaining to the correspondence between quantum and classical dynamics are proved for the general multi - particle quantum mechanical systems with discrete eigenvalues . the theorems relate quantum mechanical eigenvalues and eigenfunctions to the properties of the classical mec...
an interesting observation was reported by corrigan - sasaki that all the frequencies of small oscillations around equilibrium are _ quantised _ " for calogero and sutherland ( c - s ) systems , typical integrable multi - particle dynamics . we present an analytic proof by applying recent results of loris - sasaki . e...
an interesting observation was reported by corrigan - sasaki that all the frequencies of small oscillations around equilibrium are _ quantised _ " for calogero and sutherland ( c - s ) systems , typical integrable multi - particle dynamics . we present an analytic proof by applying recent results of loris - sasaki . e...
1612.01201
i
nanoscale electronic devices in contact with superconducting contacts ( s ) exhibit a large variety of fundamental physical phenomena and play , for example , a central role in schemes for quantum computation.@xcite if s is in contact with the many quantum channels of a normal metal ( n ) , phase - coherent andreev ref...
andreev bound states ( abss ) are well - defined many - body quantum states that emerge from the hybridization of individual quantum dot ( qd ) states with a superconductor and exhibit very rich and fundamental phenomena . we demonstrate several new electron transport phenomena mediated by abss that form on three - ter...
andreev bound states ( abss ) are well - defined many - body quantum states that emerge from the hybridization of individual quantum dot ( qd ) states with a superconductor and exhibit very rich and fundamental phenomena . we demonstrate several new electron transport phenomena mediated by abss that form on three - ter...
1612.01201
c
in summary , we investigate electronic transport mediated by andreev bound states in a three - terminal s - qd device and identify the coupling to the normal metal leads as the main source for the spectroscopic broadening of the andreev resonances , and establish how the coupling to the superconductor determines the gr...
three - terminal spectroscopy allows us to identify the coupling to the n contacts as the origin of the andreev resonance ( ar ) linewidths and to determine the critical coupling strengths to s , for which a ground state ( or quantum phase ) transition in such s - qd systems can occur . surprisingly , we find that , de...
andreev bound states ( abss ) are well - defined many - body quantum states that emerge from the hybridization of individual quantum dot ( qd ) states with a superconductor and exhibit very rich and fundamental phenomena . we demonstrate several new electron transport phenomena mediated by abss that form on three - ter...
0801.1111
i
characterizing old stellar populations provide important constraints on the early star formation histories of galaxies . only the satellite galaxies of the milky way ( mw ) are sufficiently close to resolve individual stars well below the oldest main - sequence turn - offs , which is a pre - condition for accurate phot...
we derive the age of ngc121 using both absolute and relative age - dating methods . therefore we confirm the earlier finding that the oldest globular cluster in the small magellanic cloud , ngc121 , is a few gyr younger than its oldest counterparts in the milky way and in other nearby dwarf galaxies such as the large m...
as first paper of a series devoted to study the old stellar population in clusters and fields in the small magellanic cloud , we present deep observations of ngc121 in the f555w and f814w filters , obtained with the advanced camera for surveys on the _ hubble space telescope_. the resulting color - magnitude diagram re...
0801.1111
i
we derived ages for the old smc globular cluster ngc121 based on our high dynamic range hst / acs photometry that extends at least three magnitudes below its msto . in order to obtain absolute ages , we applied three different isochrone models . these isochrone models yielded ages of @xmath110 gyr ( padova ) , @xmath1...
as first paper of a series devoted to study the old stellar population in clusters and fields in the small magellanic cloud , we present deep observations of ngc121 in the f555w and f814w filters , obtained with the advanced camera for surveys on the _ hubble space telescope_. the resulting color - magnitude diagram re...
as first paper of a series devoted to study the old stellar population in clusters and fields in the small magellanic cloud , we present deep observations of ngc121 in the f555w and f814w filters , obtained with the advanced camera for surveys on the _ hubble space telescope_. the resulting color - magnitude diagram re...
hep-ph0402263
i
at high temperature and/or baryon density , the system governed by qcd will show a transition from an ordinary hadronic phase to a chirally symmetric , deconfined plasma phase@xcite . the main objective of the heavy ion programs at rhic and at future lhc is to create this long - sought plasma state and to study collec...
assuming a tricritical point of the two flavor qcd in the space of temperature , baryon number chemical potential and quark mass , we study the change of the associated soft mode along the critical line within the ginzburg landau approach and the nambu jona - lasinio model . the ordering density along the chiral cri...
assuming a tricritical point of the two flavor qcd in the space of temperature , baryon number chemical potential and quark mass , we study the change of the associated soft mode along the critical line within the ginzburg landau approach and the nambu jona - lasinio model . the ordering density along the chiral cri...
1408.0168
i
in this paper , we investigate numerically the behavior of granular material at the surface of an asteroid during close approach to the earth . we focus on the specific case of asteroid ( 99942 ) apophis , which will come as close as @xmath3 earth radii on april 13th , 2029 . we provide predictions about possible resha...
asteroid ( 99942 ) apophis close approach in 2029 will be one of the most significant small - body encounter events in the near future and offers a good opportunity for exploration to determine the asteroid s surface properties and measure any tidal effects that might alter its regolith configuration . resurfacing mech...
asteroid ( 99942 ) apophis close approach in 2029 will be one of the most significant small - body encounter events in the near future and offers a good opportunity for exploration to determine the asteroid s surface properties and measure any tidal effects that might alter its regolith configuration . resurfacing mech...
1408.0168
r
richardson et al . ( 1998 ) showed the complicated behavior of a rotating rubble pile due to a tidal encounter . generally , a variation in rotational state is usually induced because of the coupling effect between librational motion and orbital motion . especially for elongated bodies like apophis , the terrestrial t...
the potential shape modification of the object due to the tidal encounter is first confirmed to be negligibly small with systematic simulations , thus only the external perturbations are taken into account for this work ( despite this , seismic shaking induced by shifting blocks might still play a weak role and we will...
asteroid ( 99942 ) apophis close approach in 2029 will be one of the most significant small - body encounter events in the near future and offers a good opportunity for exploration to determine the asteroid s surface properties and measure any tidal effects that might alter its regolith configuration . resurfacing mech...
1408.0168
c
this paper provides a numerically derived prediction for the surface effects on ( 99942 ) apophis during its 2029 approach , which is likely to be one of the most significant asteroid encounter events in the near future . a two - stage scheme was developed based on the soft - sphere code implementation in ` pkdgrav ` t...
this paper provides a prediction for the tidal effects during the 2029 encounter , with an emphasis on whether surface refreshing due to regolith movement will occur . the local mechanical environment on the asteroid surface is represented in detail , leading to an estimation of the change in global surface environment...
asteroid ( 99942 ) apophis close approach in 2029 will be one of the most significant small - body encounter events in the near future and offers a good opportunity for exploration to determine the asteroid s surface properties and measure any tidal effects that might alter its regolith configuration . resurfacing mech...
1610.05810
i
topology has played an increasingly important role in condensed matter physics . an early application involved using topological chern - simons theory in quantum hall systems @xcite . more recently , topological ideas applied to brillouin zone ( bz ) have played a significant role in classifying topological phases of m...
berry connection is conventionally defined as a static gauge field in the brillouin zone . here we show that for three - dimensional ( 3d ) time - reversal invariant superconductors , a generalized berry gauge field behaves as a dynamical fluctuating field of a chern - simons gauge theory . the gapless nodal lines in t...
berry connection is conventionally defined as a static gauge field in the brillouin zone . here we show that for three - dimensional ( 3d ) time - reversal invariant superconductors , a generalized berry gauge field behaves as a dynamical fluctuating field of a chern - simons gauge theory . the gapless nodal lines in t...
math0506242
i
reduced decompositions of permutations are classical objects in combinatorics that appear throughout the literature . following the work of rodica simion and frank schmidt in @xcite , the study of permutation patterns , particularly pattern avoidance , has become a frequently studied field as well . in @xcite , sara...
this paper generalizes that result with a detailed study of permutations via their reduced decompositions and the notion of pattern containment . additionally , the combined frameworks yield several new results about the commutation classes of a permutation . in particular , these describe structural aspects of the cor...
billey , jockusch , and stanley characterized-avoiding permutations by a property of their reduced decompositions . this paper generalizes that result with a detailed study of permutations via their reduced decompositions and the notion of pattern containment . these techniques are used to prove a new characterization ...
math-ph0401054
i
in recent years there has been an increasing interest in the geometric treatment of non - holonomic mechanical systems , see , e.g. , @xcite . in particular , it has been recognised that the hamiltonian formulation of such systems can be stated in terms of an _ almost - poisson _ bracket , that is , a biderivation of f...
borisov , mamaev and kilin have recently found certain poisson structures with respect to which the reduced and rescaled systems of certain non - holonomic problems , involving rolling bodies without slipping , become hamiltonian , the hamiltonian function being the reduced energy . we show that they are determined , u...
borisov , mamaev and kilin have recently found certain poisson structures with respect to which the reduced and rescaled systems of certain non - holonomic problems , involving rolling bodies without slipping , become hamiltonian , the hamiltonian function being the reduced energy . we study further the algebraic origi...
astro-ph0312315
c
that significant and correlated star - to - star differences in c and n , as well as o , na , al , and mg have been found among the sgb , msto , and ms stars of several clusters ( see references above ) , implies the operation of some process external to the present stars , presumably having taken place early in the cl...
we presume these differences to be the result of some process operating early in the cluster history . a comparison of c abundances derived using the present methods and those from the literature yield a mean difference of 0.03.14 dex for four stars in common with and 0.14.07 dex for stars also observed by ( if one ...
building upon earlier observations which demonstrate substantial star - to - star differences in the carbon abundances of m13 subgiants , we present new keck lris spectra reaching more that 1.5 mag below the m13 main - sequence turn - off ( to v 20 ) . our analysis reveals a distribution of c abundances similar to that...
0905.3933
c
we present robust evidence for the prevailing existence of hot gas clumps , whose characteristic scales are @xmath0 @xmath1 kpc , in the central regions of a sample of nine intermediate - redshift galaxy clusters . these substructures are not caused by uncertainties in background subtraction , response calibration , an...
since if there were no significant non - gravitational heating sources , these substructures would have perished in yrs due to thermal conduction and turbulent flows , whose velocity is found to range from about 200 to 400 km , we conclude that the substructures can not be created and sustained by inhomogeneous radiati...
by analyzing the gas temperature maps created from the archive data , we reveal the prevailing existence of temperature substructures on kpc scales in the central regions of nine intermediate - redshift ( ) galaxy clusters , which resemble those found in the virgo and coma clusters . each substructure contains a clump ...
0905.3933
i
we reveal the prevailing existence of temperature substructures on @xmath0 @xmath1 kpc scales in the central regions of nine intermediate - redshift galaxy clusters . by comparing the characteristic destruction times of the temperature substructures with the gas cooling times and the rising times of agn - induced bubbl...
by analyzing the gas temperature maps created from the archive data , we reveal the prevailing existence of temperature substructures on kpc scales in the central regions of nine intermediate - redshift ( ) galaxy clusters , which resemble those found in the virgo and coma clusters . each substructure contains a clump ...
by analyzing the gas temperature maps created from the archive data , we reveal the prevailing existence of temperature substructures on kpc scales in the central regions of nine intermediate - redshift ( ) galaxy clusters , which resemble those found in the virgo and coma clusters . each substructure contains a clump ...
astro-ph0012365
i
ultraluminous infrared galaxies ( ulirgs ) with @xmath16 @xmath3 @xmath4 @xmath5 discovered by the @xmath17 @xmath18 @xmath19 ( iras ) are considered to be ideal laboratories for studying the formation of dusty starburst galaxies , elliptical galaxies , and qsos . detailed morphological studies of these ulirgs have rev...
main results are the following five . \(1 ) global colors and absolute magnitudes the during dusty starburst of a major merger do not change with time significantly , because interstellar dust heavily obscures young starburst populations that could cause rapid evolution of photometric properties of the merger . o...
by performing n - body simulations of chemodynamical evolution of galaxies with dusty starbursts , we investigate photometric evolution of gas - rich major mergers in order to explore the nature of ultraluminous infrared galaxies ( ulirgs ) with the total infrared luminosity ( for m ) of . main results are the followin...
astro-ph0012365
c
we have investigated in detail morphological , structural , and photometric evolution of gas - rich major mergers with strong dusty starburst in an explicitly self - consistent manner in order to explore the nature of ulirgs . main conclusions are summarized as follows . \(1 ) a massive starburst triggered by dynamical...
by performing n - body simulations of chemodynamical evolution of galaxies with dusty starbursts , we investigate photometric evolution of gas - rich major mergers in order to explore the nature of ultraluminous infrared galaxies ( ulirgs ) with the total infrared luminosity ( for m ) of . \(2 ) dust extinction of stel...
by performing n - body simulations of chemodynamical evolution of galaxies with dusty starbursts , we investigate photometric evolution of gas - rich major mergers in order to explore the nature of ultraluminous infrared galaxies ( ulirgs ) with the total infrared luminosity ( for m ) of . main results are the followin...
1204.3222
m
many of the standard methods of combinatorial game theory have proven ineffective for analyzing the effects of a pass in a game . in the case of nim , for instance , bouton s @xcite elegant solution method ( along with the more general sprague - grundy theory which generalizes it @xcite ) breaks down when a pass is int...
we consider two well known combinatorial games , 3-pile nim and 3-row chomp . in the case of nim = 1.5 combinatorial games like chess , checkers , go , nim , and chomp have been the focus of considerable attention in the fields of computer science , mathematics , artificial intelligence , and most recently , chaos a...
by treating combinatorial games as dynamical systems , we are able to address a longstanding open question in combinatorial game theory , namely , how the introduction of a `` pass '' move into a game affects its behavior . we consider two well known combinatorial games , 3-pile nim and 3-row chomp . in the case of nim...
1403.0032
i
cassiopeia a ( cas a ; 3c 461 , g111.7 - 2.1 ) is the 2nd - youngest - known supernova remnant ( snr ) and , at a distance of 3.4 kpc @xcite , it lies just beyond the perseus arm of the galaxy . with the discovery of light echoes from the explosion , we now know that cas a resulted from a type iib explosion @xcite ....
low frequency ( mhz ) radio observations of sufficient angular resolution offer a unique probe of unshocked ejecta revealed via free - free absorption against the synchrotron emitting shell . this is a significant improvement over the 100 upper limit offered by infrared [ ] line ratios from the _ spitzer space telesc...
characterizing the ejecta in young supernova remnants is a requisite step towards a better understanding of stellar evolution . in cassiopeia a the density and total mass remaining in the unshocked ejecta are important parameters for modeling its explosion and subsequent evolution . low frequency ( mhz ) radio observ...
1403.0032
c
we have imaged cas a from 5 ghz to 74 mhz in all four configurations of the legacy vla with follow - up observations at 74 and 330 mhz with the legacy vla+pt link . our spatially resolved spectral index maps confirm the interior spectral flattening measured earlier , but at higher signal - to - noise and resolution...
finally we reconcile the intrinsic absorption from unshocked ejecta with the turnover in cas a s integrated spectrum documented decades ago at much lower frequencies . these and other recent observations below 100 mhz confirm that spatially resolved thermal absorption , when extended to lower frequencies and higher r...
characterizing the ejecta in young supernova remnants is a requisite step towards a better understanding of stellar evolution . in cassiopeia a the density and total mass remaining in the unshocked ejecta are important parameters for modeling its explosion and subsequent evolution . low frequency ( mhz ) radio observ...
0906.0803
i
we identify 39,668 clusters of galaxies in the redshift range @xmath107 using photometric redshifts of galaxies from the sdss dr6 . a cluster is recognized if more than eight member galaxies of @xmath2 are found within a radius of 0.5 mpc and a photometric redshift gap between @xmath79 . this is the largest cluster cat...
clusters of galaxies in most previous catalogs have redshifts . using the photometric redshifts of galaxies from the sloan digital sky survey data release 6 ( sdss dr6 ) , we identify 39,668 clusters in the redshift range with more than eight luminous ( ) member galaxies . cluster redshifts are estimated accurately wit...
clusters of galaxies in most previous catalogs have redshifts . using the photometric redshifts of galaxies from the sloan digital sky survey data release 6 ( sdss dr6 ) , we identify 39,668 clusters in the redshift range with more than eight luminous ( ) member galaxies . cluster redshifts are estimated accurately wit...
1010.5116
i
we consider here the cauchy problem for the general scalar balance law @xmath4 this kind of equation has already been intensively studied : a fundamental result is the one of s. n. krukov ( * ? ? ? * theorem 1 & 5 ) , stating the existence and uniqueness of a weak entropy solution for an initial data @xmath5 . further...
consider the general scalar balance law in several space dimensions . the aim of this note is to improve the results of colombo , mercier , rosini who gave an estimate of the dependence of the solutions from the flow and from the source . the improvements are twofold : first the expression of the coefficients in these ...
consider the general scalar balance law in several space dimensions . the aim of this note is to improve the results of colombo , mercier , rosini who gave an estimate of the dependence of the solutions from the flow and from the source . the improvements are twofold : first the expression of the coefficients in these ...
1505.07607
i
a fundamental statistical problem is shrinkage estimation of a multivariate normal mean . see , for example , the february 2012 issue of _ statistical science _ for a broad range of theory , methods , and applications . let @xmath0 be multivariate normal with _ unknown _ mean vector @xmath1 and _ known _ variance matri...
consider the problem of estimating a multivariate normal mean with a known variance matrix , which is not necessarily proportional to the identity matrix . the coordinates are shrunk directly in proportion to their variances in efron and morris ( _ j . amer . statist . assoc . _ statist . _ * 4 * ( 1976 ) 223226 ) mini...
consider the problem of estimating a multivariate normal mean with a known variance matrix , which is not necessarily proportional to the identity matrix . the coordinates are shrunk directly in proportion to their variances in efron and morris ( _ j . amer . statist . assoc . _ * 68 * ( 1973 ) 117130 ) empirical bayes...
astro-ph0510348
i
gammma - ray bursts ( grbs ) were discovered serendipitously as flashes in the sky " by the nuclear test - ban monitoring satellites vela ( us ) and konus ( ussr ) . these were soon recognized to be a natural phenomenon . the first data were publicly released by @xcite and @xcite . the mysterious origin of this new as...
current phenomenology suggests the presence of a compact baryon - poor energy source to cosmological gamma - ray bursts reacting to high - density matter . the association of short and long gamma - ray bursts with hyper- and suspended accretion onto slowly and rapidly spinning black holes predicts weak x - ray afterglo...
current phenomenology suggests the presence of a compact baryon - poor energy source to cosmological gamma - ray bursts reacting to high - density matter . the association of short and long gamma - ray bursts with hyper- and suspended accretion onto slowly and rapidly spinning black holes predicts weak x - ray afterglo...
astro-ph0510348
c
the sixties saw two independent discoveries : the first grb670702 by the vela satellite and the exact solution of rotating black holes by roy p. kerr . through observational campaigns with batse , bepposax , the interplanetary network ( ipn ) , hete - ii and now swift , we have come to understand the phenomenology of g...
long gamma - ray bursts are probably the birth place of rapidly spinning high - mass black holes in core - collapse of massive stars , as in grb030329 with supernova sn2003dh . in contrast to mev - neutrino emissions , as in sn1987a , this can be tested by the advanced detectors ligo and virgo about once per year up to...
current phenomenology suggests the presence of a compact baryon - poor energy source to cosmological gamma - ray bursts reacting to high - density matter . the association of short and long gamma - ray bursts with hyper- and suspended accretion onto slowly and rapidly spinning black holes predicts weak x - ray afterglo...
1503.04066
r
we consider data sets describing contacts between individuals , collected by the sociopatterns collaboration ( http://www.sociopatterns.org ) in three different settings : a workplace ( office building , invs ) @xcite , a high school ( thiers13 ) @xcite and a scientific conference ( sfhh ) @xcite . these data correspon...
data describing human interactions often suffer from incomplete sampling of the underlying population . as a consequence , the study of contagion processes using data - driven models can lead to a severe underestimation of the epidemic risk . here we present a systematic method to alleviate this issue and obtain a bett...
data describing human interactions often suffer from incomplete sampling of the underlying population . as a consequence , the study of contagion processes using data - driven models can lead to a severe underestimation of the epidemic risk . here we present a systematic method to alleviate this issue and obtain a bett...
1503.04066
c
the understanding of epidemic spreading phenomena has been vastly improved thanks to the use of data - driven models at different scales . high resolution contact data in particular have been used to evaluate epidemic risk or containment policies in specific populations or to perform contact tracing @xcite . in such st...
we simulate epidemic processes on the resulting reconstructed data sets and show that it is possible to obtain good estimates of the outcome of simulations performed using the complete data set . such data has been used to inform models of epidemic spreading phenomena used to evaluate epidemic risks and mitigation stra...
data describing human interactions often suffer from incomplete sampling of the underlying population . as a consequence , the study of contagion processes using data - driven models can lead to a severe underestimation of the epidemic risk . here we present a systematic method to alleviate this issue and obtain a bett...
1503.04066
m
we consider data sets collected using the sociopatterns proximity sensing platform ( http://www.sociopatterns.org ) based on wearable sensors that detect close face - to - face proximity of individuals wearing them . informed consent was obtained from all participants and the french national bodies responsible for ethi...
while surveys and diaries in which volunteer participants record their encounters have provided crucial insights ( see however for recent investigations of the memory biases inherent in self - reporting procedures ) , new approaches have recently emerged to measure contact patterns between individuals with high resolut...
data describing human interactions often suffer from incomplete sampling of the underlying population . as a consequence , the study of contagion processes using data - driven models can lead to a severe underestimation of the epidemic risk . here we present a systematic method to alleviate this issue and obtain a bett...
gr-qc0508118
c
we have demonstrated that , from currently available information , there is no contradiction between models and the full theory of loop quantum gravity . instead , a consistent picture emerges when all cases , isotropic as well as anisotropic or inhomogeneous models and the full theory , are considered . there is a tec...
significant features of this unboundedness are not a consequence of inhomogeneities but of non - abelian effects which can also be included in homogeneous models . aei2005133 + gr qc/0508118 + degenerate configurations , singularities and + the non - abelian nature of loop quantum gravity + martin bojowald + max...
degenerate geometrical configurations in quantum gravity are important to understand if the fate of classical singularities is to be revealed . however , not all degenerate configurations arise on an equal footing , and one must take into account dynamical aspects when interpreting results : while there are many degene...
1606.03392
c
at ambient temperature and strong tension , bubbles in metastable water are essentially voids in the liquid whose shape can deviate significantly from the assumption of a spherical nucleus made in cnt , depending on their size . nonetheless , provided the dependence of the surface tension on the average curvature is in...
comparison of the observed bubble dynamics to the predictions of the macroscopic rayleigh plesset ( rp ) equation , augmented with thermal fluctuations , demonstrates that the growth of nanoscale bubbles is governed by viscous forces . combining the dynamical prefactor determined from the rp equation with cnt based on...
despite its relevance in biology and engineering , the molecular mechanism driving cavitation in water remains unknown . using computer simulations , we investigate the structure and dynamics of vapor bubbles emerging from metastable water at negative pressures . we find that in the early stages of cavitation , bubbles...
1606.03392
m
we simulate @xmath75 water molecules in the isothermal isobaric ensemble at a temperature of @xmath24 using the rigid , non - polarisable tip4p/2005 model @xcite , where the long - range interactions are treated with ewald summation . the rate computations are carried out using molecular dynamics by integrating the e...
, we apply a combination of several complementary computer simulation methods to identify the molecular mechanism of cavitation . chandler approach for the computation of reaction rate constants . the obtained rates are validated for selected points by comparison to estimates from transition interface sampling and supp...
despite its relevance in biology and engineering , the molecular mechanism driving cavitation in water remains unknown . using computer simulations , we investigate the structure and dynamics of vapor bubbles emerging from metastable water at negative pressures . we find that in the early stages of cavitation , bubbles...
1606.03392
r
to put the cavitation pressure presented in fig . [ fig : rates ] into context , we discuss its relation to experimental results obtained from different setups . our estimate for the cavitation pressure , obtained from the cavitation rates calculated for typical experimental conditions , @xmath236 , can help disentangl...
this suggests that homogeneous nucleation is observed in inclusions , whereas only heterogeneous nucleation on impurities or defects occurs in other experiments . recently , cavitation in water under tension has drawn research interest due to its importance in biological processes , like water transport in natural a...
despite its relevance in biology and engineering , the molecular mechanism driving cavitation in water remains unknown . using computer simulations , we investigate the structure and dynamics of vapor bubbles emerging from metastable water at negative pressures . we find that in the early stages of cavitation , bubbles...
astro-ph9905371
i
compact x - ray sources exhibit a wide range of temporal variabilities ( from milliseconds to years ) . perhaps none of these is as exotic and diverse as the x - ray temporal variability observed from the black hole microquasar grs 1915 + 105 ( castro - tirado , brandt , & lund 1992 ; greiner , morgan , & remillard 19...
during the past two years , the galactic black hole microquasar grs 1915 + 105 has exhibited a bewildering diversity of large amplitude , chaotic variability in x - rays . although it is generally accepted that the variability in this source results from an accretion disk instability , the exact nature of the instabil...
during the past two years , the galactic black hole microquasar grs 1915 + 105 has exhibited a bewildering diversity of large amplitude , chaotic variability in x - rays . although it is generally accepted that the variability in this source results from an accretion disk instability , the exact nature of the instabil...
astro-ph9905371
r
there are essentially 5 free parameters of the model that need to be specified and/or systematically varied to ascertain the sensitivity of the results to their value : ( _ i _ ) the black hole mass , @xmath15 , ( _ ii _ ) the average accretion rate , @xmath10 , ( _ iii _ ) the viscosity parameter , @xmath69 , for the ...
here we investigate different accretion disk models and viscosity prescriptions in order to provide a basic explanation for the exotic temporal behavior in grs 1915 + 105 . based on the fact that the overall cycle times are very much longer than the rise / fall time scales in grs 1915 , we rule out the geometry of...
during the past two years , the galactic black hole microquasar grs 1915 + 105 has exhibited a bewildering diversity of large amplitude , chaotic variability in x - rays . although it is generally accepted that the variability in this source results from an accretion disk instability , the exact nature of the instabil...
1509.08688
i
[ smotivation ] for a smooth projective variety @xmath0 of dimension @xmath1 and a birational self - map @xmath2 one can define a tuple of real numbers @xmath3 where @xmath4 for @xmath5 , called the dynamical degrees of @xmath6 . see section [ sprelim ] for two equivalent definitions of these numbers . the dynamical...
dynamical degrees and spectra can serve to distinguish birational automorphism groups of varieties in quantitative , as opposed to only qualitative , ways . we also specialize to cubic fourfolds and show that under certain genericity assumptions the first and second dynamical degrees of a composition of reflections in ...
dynamical degrees and spectra can serve to distinguish birational automorphism groups of varieties in quantitative , as opposed to only qualitative , ways . we introduce and discuss some properties of those degrees and the cremona degrees , which facilitate computing or deriving inequalities for them in concrete cases ...
physics0310031
r
the post - stimuli dynamics are constrained by the steady states of the system . for loops longer than a minimum length @xmath75 , sustained reentries are stable attractor of the system . these sustained reentries can be either periodic ( period-1 ) or quasiperiodic ( qp ) , and hold a single ( sw ) , two ( dw ) or mor...
it follows that reentry can be stopped over a limited interval of the pathway length and that increasing the length beyond the upper limit of this interval yields to a transition to sustained double - wave reentry . a similar dynamical mechanism , labeled alternans amplification , is found to be responsible for both be...
electrical pacing is a common procedure that is used in both experimental and clinical settings for studying and/or annihilating anatomical reentry . in a recent study [ comtois and vinet , chaos * 12 * , 903 ( 2002 ) ] , new ways to terminate the one - dimensional reentry using a simple protocol consisting of only two...
1312.4891
c
the well - known static mp systems in gr include gravitational and electromagnetic fields and electrically charged dust with equal densities @xmath323 . we have considered a generalization of mp systems , including a dilatonic scalar field ( the dilatonic mp , or dmp systems ) with an arbitrary coupling function @xmath...
electrically charged dust is considered in the framework of einstein - maxwell - dilaton gravity with a lagrangian containing the interaction term , where is an arbitrary function of the dilaton scalar field , which can be normal or phantom . without assumption of spatial symmetry , we show that static configurations e...
electrically charged dust is considered in the framework of einstein - maxwell - dilaton gravity with a lagrangian containing the interaction term , where is an arbitrary function of the dilaton scalar field , which can be normal or phantom . without assumption of spatial symmetry , we show that static configurations e...