id large_stringlengths 9 16 | title large_stringlengths 1 382 | abstract large_stringlengths 3 6.09k | publish_date date32 | update_date date32 | categories large listlengths 1 13 | authors large_stringlengths 3 62.8k |
|---|---|---|---|---|---|---|
cond-mat/9503142 | Integro-Difference Equation for a correlation function of the
spin-${1\over2}$ Heisenberg XXZ chain | We consider the Ferromagnetic-String-Formation-Probability correlation
function (FSFP) for the spin-$1\over 2$ Heisenberg XXZ chain. We construct a
completely integrable system of integro-difference equations (IDE), which has
the FSFP as a $\tau$-function. We derive the associated Riemann-Hilbert problem
and obtain the... | 1995-03-28 | 2009-10-28 | [
"cond-mat",
"hep-th",
"nlin.SI",
"solv-int"
] | F.H.L. Essler, H. Frahm, A.R. Its and V.E.K. Korepin |
cond-mat/9503145 | Critical point and coexistence curve properties of the Lennard-Jones
fluid: A finite-size scaling study | Monte Carlo simulations within the grand canonical ensemble are used to
explore the liquid-vapour coexistence curve and critical point properties of
the Lennard-Jones fluid. Attention is focused on the joint distribution of
density and energy fluctuations at coexistence. In the vicinity of the critical
point, this dist... | 1995-03-28 | 2009-10-28 | [
"cond-mat",
"chem-ph"
] | Nigel B. Wilding |
cond-mat/9503148 | FIBONACCI SUPERLATTICES OF NARROW-GAP III-V SEMICONDUCTORS | We report theoretical electronic structure of Fibonacci superlattices of
narrow-gap III-V semiconductors. Electron dynamics is accurately described
within the envelope-function approximation in a two-band model.
Quasiperiodicity is introduced by considering two different III-V semiconductor
layers and arranging them ac... | 1995-03-28 | 2009-10-28 | [
"cond-mat"
] | F. Dominguez-Adame, E. Macia, B. Mendez, C. L. Roy, and A. Khan |
cond-mat/9503143 | Spin Dependence of Correlations in Two-Dimensional Quantum Heisenberg
Antiferromagnets | We present a series expansion study of spin-S square-lattice Heisenberg
antiferromagnets. The numerical data are in excellent agreement with recent
neutron scattering measurements. Our key result is that the correlation length
for S>1/2 strongly deviates from the exact T->0 (renormalized classical, or RC)
scaling predi... | 1995-03-28 | 2009-10-28 | [
"cond-mat"
] | N. Elstner, A. Sokol, R.R.P. Singh, M. Greven, and R.J. Birgeneau |
cond-mat/9503144 | SCALING AND INTERMITTENCY IN BURGERS' TURBULENCE | We use the mapping between Burgers' equation and the problem of a directed
polymer in a random medium in order to study the fully developped turbulence in
the $N$ dimensional forced Burgers' equation. The stirring force corresponds to
a quenched (spatio temporal) random potential for the polymer. The properties
of the ... | 1995-03-28 | 2009-10-28 | [
"cond-mat",
"chao-dyn",
"nlin.CD"
] | J.P. Bouchaud, M. Mezard and G. Parisi |
cond-mat/9503141 | Spectral Statistics Beyond Random Matrix Theory | Using a nonperturbative approach we examine the large frequency asymptotics
of the two-point level density correlator in weakly disordered metallic grains.
This allows us to study the behavior of the two-level structure factor close to
the Heisenberg time. We find that the singularities (present for random matrix
ensem... | 1995-03-27 | 2016-08-31 | [
"cond-mat"
] | A. V. Andreev and B. L. Altshuler (MIT and NECI) |
cond-mat/9503138 | Charged Pseudospin Textures in Double-Layer Quantum Hall Systems with
Spontaneous Interlayer Coherence | We report on a Hartree-Fock approximation study of the meron
pseudospin-texture excitations of the broken-symmetry incompressible ground
states of double-layer quantum Hall states at $\nu =1$. We have obtained
results for meron core energies and core sizes. We use these to estimate the
charge gap which determines the a... | 1995-03-27 | 2009-10-28 | [
"cond-mat"
] | Kun Yang and A.H. MacDonald |
cond-mat/9503136 | Equilibrium Properties of the Gas of Atoms of Which a Part is Excited
within Cluster Expansion Method | A gas of atoms some of which are in excited electronic state is under
consideration. Since the lifetime of an excited state is to great extent larger
than the time required for establishing the equilibrium over translational
degrees of freedom the system possesses equilibrium properties. They are
determined essentially... | 1995-03-27 | 2007-05-23 | [
"cond-mat"
] | O.Derzhko, R.Levitskii, O.Chernyavskii (Institute for Condensed Matter
Physics of the Ukrainian National Academy of Sciences) |
cond-mat/9503134 | Critical phenomena in superlattices: Reentrant dimensional crossover and
anomalous critical amplitudes | A crossover from $d$ to $d-1$, and then back to $d$-dimensional critical
behavior is argued to be a generic feature characterizing ordering in a
$d$-dimensional superlattice composed of atomically {\em thick} films of two
ferromagnets. The crossover leads to anomalous changes in the amplitudes of
critical singularities... | 1995-03-27 | 2007-05-23 | [
"cond-mat"
] | Lev Mikheev (Nordita) |
cond-mat/9503133 | Dynamics of a Strongly Damped Two-Level System: Beyond the DBGA | Dynamics of a dissipative two-level system is studied using quantum
relaxation theory. This calculation for the first time goes beyond the commonly
used dilute bounce gas approximation (DBGA), even for strong damping. The new
results obtained here deviate from the DBGA results at low temperatures,
however, the DBGA for... | 1995-03-27 | 2011-12-13 | [
"cond-mat"
] | Tabish Qureshi |
cond-mat/9503137 | Excitons in type-II quantum dots: Finite offsets | Quantum size effects for an exciton attached to a spherical quantum dot are
calculated by a variational approach. The band line-ups are assumed to be
type-II with finite offsets. The dependence of the exciton binding energy upon
the dot radius and the offsets is studied for different sets of electron and
hole effective... | 1995-03-27 | 2009-10-28 | [
"cond-mat"
] | U. E. H. Laheld, F. B. Pedersen, P. C. Hemmer |
cond-mat/9503140 | DESTRUCTION OF THE QUANTUM HALL EFFECT WITH INCREASING DISORDER | We report experimental studies of disorder-induced transitions between
quantum-Hall, metallic, and insulating states in a very dilute two-dimensional
electron system in silicon at a magnetic field corresponding to Landau level
filling factor $\nu=1$. At low disorder, the lowest extended state at $\nu=1$
is below the Fe... | 1995-03-27 | 2009-10-28 | [
"cond-mat"
] | J. E. Furneaux, S. V. Kravchenko, Whitney Mason, G. E. Bowker, and V.
M. Pudalov |
cond-mat/9503139 | Singularity of the density of states in the two-dimensional Hubbard
model from finite size scaling of Yang-Lee zeros | A finite size scaling is applied to the Yang-Lee zeros of the grand canonical
partition function for the 2-D Hubbard model in the complex chemical potential
plane. The logarithmic scaling of the imaginary part of the zeros with the
system size indicates a singular dependence of the carrier density on the
chemical poten... | 1995-03-27 | 2009-10-28 | [
"cond-mat",
"hep-lat"
] | E. Abraham, I.M. Barbour, P.H. Cullen, E.G. Klepfish, E.R. Pike and
Sarben Sarkar |
cond-mat/9503132 | Transport properties of nonlinear double-barrier structures | We introduce a solvable model of a nonlinear double-barrier structure,
described by a generalized effective-mass equation with a nonlinear coupling
term. This model is interesting in its own right for possible new applications,
as well as to help understand the combined effect of spatial correlations and
nonlinearity o... | 1995-03-27 | 2007-05-23 | [
"cond-mat"
] | E. Diez, A. Sanchez, and F. Dominguez-Adame |
cond-mat/9503135 | Scaling Of The Coulomb Energy Due To Quantum Fluctuations In The Charge
Of A Quantum Dot | The charging energy of a quantum dot is measured through the effect of its
potential on the conductance of a second dot. This technique allows a
measurement of the scaling of the dot's charging energy with the conductance of
the tunnel barriers leading to the dot. We find that the charging energy scales
quadratically w... | 1995-03-27 | 2009-10-28 | [
"cond-mat"
] | L. W. Molenkamp, K. Flensberg, and M. Kemerink |
cond-mat/9503129 | Bounds for the phonon-roton dispersion in superfluid 4He | The sum rule approach is used to derive upper bounds for the dispersion law
$\omega_0(q)$ of the elementary excitations of a Bose superfluid. Bounds are
explicitly calculated for the phonon-roton dispersion in superfluid $^4$He,
both at equilibrium ($\rho=0.02186$ \AA$^{-3}$) and close to freezing
($\rho=0.02622$ \AA$^... | 1995-03-24 | 2009-10-28 | [
"cond-mat"
] | J. Boronat, J. Casulleras, F. Dalfovo, S. Moroni, and S. Stringari |
cond-mat/9503130 | Spatial Organization in the Reaction A + B --> inert for Particles with
a Drift | We describe the spatial structure of particles in the (one dimensional)
two-species annihilation reaction A + B --> 0, where both species have a
uniform drift in the same direction and like species have a hard core
exclusion. For the case of equal initial concentration, at long times, there
are three relevant length sc... | 1995-03-24 | 2009-10-28 | [
"cond-mat",
"comp-gas",
"nlin.CG"
] | S. A. Janowsky (Department of Mathematics, University of Texas at
Austin) |
cond-mat/9503131 | Effects of distance dependence of exciton hopping on the Davydov soliton | The Davydov model of energy transfer in molecular chains is reconsidered
assuming the distance dependence of the exciton hopping term. New equations of
motion for phonons and excitons are derived within the coherent state
approximation. Solving these nonlinear equations result in the existence of
Davydov-like solitons.... | 1995-03-24 | 2009-10-28 | [
"cond-mat"
] | E.A. Bartnik, J.A. Tuszynski and D. Sept |
cond-mat/9503128 | Concentration for One and Two Species One-Dimensional Reaction-Diffusion
Systems | We look for similarity transformations which yield mappings between different
one-dimensional reaction-diffusion processes. In this way results obtained for
special systems can be generalized to equivalent reaction-diffusion models. The
coagulation (A + A -> A) or the annihilation (A + A -> 0) models can be mapped
onto... | 1995-03-24 | 2016-08-31 | [
"cond-mat"
] | Horatiu Simon |
cond-mat/9503125 | Doping Effects and Electronic States in C60-Polymers | Band structures of C60-polymers are studied changing conjugation conditions
and the electron number. We use a Su-Schrieffer-Heeger type semiempirical
model. In the neutral C60-polymer, electronic structures change among
direct-gap insulator and the metal, depending on the degree of conjugations.
The C60-polymer doped w... | 1995-03-23 | 2008-02-03 | [
"cond-mat",
"chem-ph",
"mtrl-th",
"supr-con"
] | Kikuo Harigaya |
cond-mat/9503127 | ORIGIN OF LIGHT SCATTERING FROM DISORDERED SYSTEMS | Anelastic light scattering is computed numerically for model disordered
systems (linear chains and 2-dimensional site and bond percolators), with and
without electrical disorder. A detailed analysis of the vibrational modes and
of their Raman activity evidences that two extreme mechanisms for scattering
may be singled ... | 1995-03-23 | 2015-06-25 | [
"cond-mat"
] | P.Benassi, W.Frizzera, M.Montagna, G.Viliani (Universita' di Trento),
V.Mazzacurati, G.Ruocco, G.Signorelli (Universita' dell'Aquila). |
cond-mat/9503126 | Self-avoiding Tethered Membranes at the Tricritical Point | The scaling properties of self-avoiding tethered membranes at the tricritical
point (theta-point) are studied by perturbative renormalization group methods.
To treat the 3-body repulsive interaction (known to be relevant for polymers),
new analytical and numerical tools are developped and applied to 1-loop
calculations... | 1995-03-23 | 2009-10-28 | [
"cond-mat",
"hep-th"
] | K. J. Wiese and F. David |
cond-mat/9503124 | Study of theoretical models for the liquid-vapor and metal-nonmetal
transitions of alkali fluids | Theoretical models for the liquid-vapor and metal-nonmetal transitions of
alkali fluids are investigated. Mean-field models are considered first but
shown to be inadequate. An alternate approach is then studied in which each
statistical configuration of the material is treated as inhomogeneous, with the
energy of each ... | 1995-03-22 | 2009-10-28 | [
"cond-mat"
] | E. Chacon(^1), J. P. Hernandez(^2), and P. Tarazona(^3), ((^1) CSIC
and UNED Madrid;(^2) UNC-Physics, Chapel Hill NC; (^3) C-XII UAM Madrid) |
cond-mat/9503123 | Soliton pinning by long-range order in aperiodic systems | We investigate propagation of a kink soliton along inhomogeneous chains with
two different constituents, arranged either periodically, aperiodically, or
randomly. For the discrete sine-Gordon equation and the Fibonacci and
Thue-Morse chains taken as examples, we have found that the phenomenology of
aperiodic systems is... | 1995-03-22 | 2009-10-28 | [
"cond-mat",
"nlin.PS",
"patt-sol"
] | F. Dominguez-Adame, A. Sanchez and Yu. S. Kivshar |
cond-mat/9503117 | Submonolayer Epitaxy Without A Critical Nucleus | The nucleation and growth of two--dimensional islands is studied with Monte
Carlo simulations of a pair--bond solid--on--solid model of epitaxial growth.
The conventional description of this problem in terms of a well--defined
critical island size fails because no islands are absolutely stable against
single atom detac... | 1995-03-21 | 2009-10-28 | [
"cond-mat"
] | C. Ratsch, P. \v{S}milauer, A. Zangwill, and D.D. Vvedensky |
cond-mat/9503118 | Re-entrant Layer-by-Layer Etching of GaAs(001) | We report the first observation of re-entrant layer-by-layer etching based on
{\it in situ\/} reflection high-energy electron-diffraction measurements. With
AsBr$_3$ used to etch GaAs(001), sustained specular-beam intensity oscillations
are seen at high substrate temperatures, a decaying intensity with no
oscillations ... | 1995-03-21 | 2016-08-31 | [
"cond-mat"
] | T. Kaneko, P. \v{S}milauer, B.A. Joyce, T. Kawamura, and D.D.
Vvedensky |
cond-mat/9503122 | Exact ground states of generalized Hubbard models | We present a simple method for the construction of exact ground states of
generalized Hubbard models in arbitrary dimensions. This method is used to
derive rigorous criteria for the stability of various ground state types, like
the $\eta$-pairing state, or N\'eel and ferromagnetic states. Although the
approach presente... | 1995-03-21 | 2009-10-28 | [
"cond-mat"
] | Jan de Boer and Andreas Schadschneider |
cond-mat/9503120 | $h/2e$--Oscillations for Correlated Electron Pairs in Disordered
Mesoscopic Rings | The full spectrum of two interacting electrons in a disordered mesoscopic
one--dimensional ring threaded by a magnetic flux is calculated numerically.
For ring sizes far exceeding the one--particle localization length $L_1$ we
find several $h/2e$--periodic states whose eigenfunctions exhibit a pairing
effect. This repr... | 1995-03-21 | 2009-10-28 | [
"cond-mat"
] | D. Weinmann, A. Mueller-Groeling, J.-L. Pichard and K. Frahm |
cond-mat/9503119 | Determination of step--edge barriers to interlayer transport from
surface morphology during the initial stages of homoepitaxial growth | We use analytic formulae obtained from a simple model of crystal growth by
molecular--beam epitaxy to determine step--edge barriers to interlayer
transport. The method is based on information about the surface morphology at
the onset of nucleation on top of first--layer islands in the submonolayer
coverage regime of ho... | 1995-03-21 | 2009-10-28 | [
"cond-mat"
] | P. \v{S}milauer and S. Harris |
cond-mat/9503121 | Scaling Law for a Magnetic Impurity Model with Two-Body Hybridization | We consider a magnetic impurity coupled to the hybridizing and screening
channels of a conduction band. The model is solved in the framework of poor
man's scaling and Cardy's generalized theories. We point out that it is
important to include a two-body hybridization if the scaling theory is to be
valid for the band wid... | 1995-03-21 | 2009-10-28 | [
"cond-mat"
] | Yue Yu, Yanmin Li, Nick d'Ambrumenil |
cond-mat/9612219 | Critical Finite-Size-Scaling Amplitudes of a Fully Anisotropic
Three-Dimensional Ising Model | A fully anisotropic simple-cubic Ising lattice in the geometry of periodic
cylinders $n\times n\times\infty$ is investigated by the transfer-matrix
finite-size scaling method. In addition to the previously obtained critical
amplitudes of the inverse correlation lengths and singular part of the free
energy [M. A. Yurish... | 1995-03-20 | 2007-05-23 | [
"cond-mat"
] | M. A. Yurishchev |
cond-mat/9503112 | Quasiparticle damping in two-dimensional superconductors with
unconventional pairing. | We calculate the damping of excitations due to four-fermionic interaction in
the case of two-dimensional superconductor with nodes in the spectrum. At zero
temperature and low frequencies it reveals gapless $\omega^3$ behavior at the
nodal points. With the frequency increasing the crossover to the normal-state
regimes ... | 1995-03-20 | 2010-05-19 | [
"cond-mat"
] | M. L. Titov, A. G. Yashenkin and D. N. Aristov |
cond-mat/9503113 | A CLASSIFICATION OF QUANTUM HALL FLUIDS | In this paper, the key ideas of characterizing universality classes of
dissipation-free (incompressible) quantum Hall fluids by mathematical objects
called quantum Hall lattices are reviewed. Many general theorems about the
classification of quantum Hall lattices are stated and their physical
implications are discussed... | 1995-03-20 | 2007-05-23 | [
"cond-mat",
"hep-th"
] | J. Froehlich, U.M. Studer, and E. Thiran |
cond-mat/9503115 | Spin Gaps in High Temperature Superconductors | The phenomenology and theory of spin gap effects in high temperature
superconductors is summarized. It is argued that the spin gap behavior can only
be explained by a model of charge 0 spin 1/2 fermions which become paired into
singlets and that there are both theoretical and experimental reasons for
believing that the... | 1995-03-20 | 2009-10-28 | [
"cond-mat"
] | A. J. Millis, L. B. Ioffe and H. Monien |
cond-mat/9503116 | Scaling of the specific heat in superfluid films | We study the specific heat of the $x-y$ model on lattices $L \times L \times
H$ with $L \gg H$ (i.e. on lattices representing a film geometry) using the
Cluster Monte--Carlo method. In the $H$--direction we apply Dirichlet boundary
conditions so that the order parameter in the top and bottom layers is zero. We
find tha... | 1995-03-20 | 2009-10-28 | [
"cond-mat"
] | N. Schultka and E. Manousakis |
cond-mat/9503114 | Ordering Kinetics of Conserved XY Models | The zero-temperature ordering kinetics of conserved XY models in spatial
dimensions $d=2$ and 3 is studied using cell dynamical simulations. The growth
of the characteristic length scale $L(t)$ is fully consistent with recent
theoretical predictions: $L(t) \sim t^{1/4}$ for $d=2$ and $L(t) \sim (t\ln
t)^{1/4}$ for $d=3... | 1995-03-20 | 2009-10-28 | [
"cond-mat"
] | Sanjay Puri, A. J. Bray, and F. Rojas |
cond-mat/9503111 | Diffusion of electrons in random magnetic fields, | Diffusion of electrons in a two-dimensional system in static random magnetic
fields is studied by solving the time-dependent Schr\"{o}dinger equation
numerically. The asymptotic behaviors of the second moment of the wave packets
and the temporal auto-correlation function in such systems are investigated. It
is shown th... | 1995-03-20 | 2009-10-28 | [
"cond-mat"
] | Tohru Kawarabayashi and Tomi Ohtsuki |
cond-mat/9503110 | The Specific Heat of a Ferromagnetic Film. | We analyze the specific heat for the $O(N)$ vector model on a $d$-dimensional
film geometry of thickness $L$ using ``environmentally friendly''
renormalization. We consider periodic, Dirichlet and antiperiodic boundary
conditions, deriving expressions for the specific heat and an effective
specific heat exponent, $\alp... | 1995-03-19 | 2009-10-28 | [
"cond-mat",
"hep-th"
] | F. Freire, Denjoe O'Connor and C.R. Stephens |
cond-mat/9503108 | Coulomb Systems Seen as Critical Systems: Ideal Conductor Boundaries | The grand potential of a classical Coulomb system has universal finite-size
corrections similar to the ones which occur in the free energy of a simple
critical system : the massless Gaussian field. Here, the Coulomb system is
assumed to be confined by walls made of an ideal conductor material; this
choice corresponds t... | 1995-03-18 | 2016-08-31 | [
"cond-mat"
] | B.Jancovici and G.Tellez |
cond-mat/9503106 | Infrared Conductivity in Layered $d$-wave Superconductors | We calculate the infrared conductivity of a stack of coupled, two-dimensional
superconducting planes within the Fermi liquid theory of superconductivity. We
include the effects of random scattering processes and show that the presence
of even a small concentration of resonant impurities, in a $d$-wave
superconductor, h... | 1995-03-18 | 2009-10-28 | [
"cond-mat"
] | M. J. Graf, Mario Palumbo, D. Rainer (Universit\"at Bayreuth), J. A.
Sauls (Northwestern University) |
cond-mat/9503105 | Effects of Magnetic Order on the Upper Critical Field of UPt$_3$ | I present a Ginzburg-Landau theory for hexagonal oscillations of the upper
critical field of UPt$_3$ near $T_c$. The model is based on a $2D$
representation for the superconducting order parameter,
$\vec{\eta}=(\eta_1,\eta_2)$, coupled to an in-plane AFM order parameter,
$\vec{m}_s$. Hexagonal anisotropy of $H_{c2}$ ar... | 1995-03-18 | 2016-08-31 | [
"cond-mat"
] | J. A. Sauls (Northwestern University) |
cond-mat/9503109 | Classical Coulomb Systems:Screening and Correlations Revisited | From the laws of macroscopic electrostatics of conductors (in particular the
existence of screening) taken for granted, one can deduce universal properties
for the thermal fluctuations in a classical Coulomb system at equilibrium. The
universality is especially apparent in the long-range correlations of the
electrical ... | 1995-03-18 | 2016-08-31 | [
"cond-mat"
] | B.Jancovici |
cond-mat/9503089 | Motion of heavy particles coupled to fermionic and bosonic environments
in one dimension | Making use of a simple unitary transformation we change the hamiltonian of a
particle coupled to an one dimensional gas of bosons or fermions to a new form
from which the many body degrees of freedom can be easily traced out. The
effective dynamics of the particle allows us to compute its damping constant in
terms of t... | 1995-03-17 | 2016-08-31 | [
"cond-mat"
] | A.O. Caldeira and A.H. Castro Neto |
cond-mat/9503096 | Multifractality: generic property of eigenstates of 2D disordered
metals. | The distribution function of local amplitudes of eigenstates of a
two-dimensional disordered metal is calculated. Although the distribution of
comparatively small amplitudes is governed by laws similar to those known from
the random matrix theory, its decay at larger amplitudes is non-universal and
much slower. This le... | 1995-03-17 | 2016-08-31 | [
"cond-mat"
] | Vladimir I. Fal'ko and K.B. Efetov (Max-Planck-Institut fur
Festkorperforschung, Stuttgart, Germany) |
cond-mat/9503098 | Consistent Application of Maximum Entropy to Quantum-Monte-Carlo Data | Bayesian statistics in the frame of the maximum entropy concept has widely
been used for inferential problems, particularly, to infer dynamic properties
of strongly correlated fermion systems from Quantum-Monte-Carlo (QMC) imaginary
time data. In current applications, however, a consistent treatment of the
error-covari... | 1995-03-17 | 2016-08-31 | [
"cond-mat"
] | W. von der Linden, R. Preuss, and W. Hanke |
cond-mat/9503104 | Equivalence of the antiferromagnetic Heisenberg ladder to a single $S=1$
chain | I introduce two continuous transformations between the $S=1$ Heisenberg chain
and the antiferromagnetic $S=1/2$ Heisenberg ladder. Both transformations
couple diagonally situated {\it next nearest neighbor} $S=1/2$'s to form each
$S=1$. Using the density matrix renormalization group, I demonstrate that the
two systems ... | 1995-03-17 | 2016-08-31 | [
"cond-mat"
] | Steven R. White |
cond-mat/9503102 | FINITE SIZE SCALING FOR FIRST ORDER TRANSITIONS: POTTS MODEL | The finite-size scaling algorithm based on bulk and surface renormalization
of de Oliveira (1992) is tested on q-state Potts models in dimensions D = 2 and
3. Our Monte Carlo data clearly distinguish between first- and second-order
phase transitions. Continuous-q analytic calculations performed for small
lattices show ... | 1995-03-17 | 2016-08-31 | [
"cond-mat"
] | P.M.C. de Oliveira, S.M. Moss de Oliveira, C.E. Cordeiro and D.
Stauffer |
cond-mat/9503099 | A Bit-String Model for Biological Aging | We present a simple model for biological aging. We studied it through
computer simulations and we have found this model to reflect some features of
real populations. | 1995-03-17 | 2009-10-28 | [
"cond-mat",
"q-bio"
] | Thadeu J.P. Penna |
cond-mat/9503094 | Density matrix algorithm for the calculation of dynamical properties of
low dimensional systems | I extend the scope of the density matrix renormalization group technique
developed by White to the calculation of dynamical correlation functions. As an
application and performance evaluation I calculate the spin dynamics of the 1D
Heisenberg chain. | 1995-03-17 | 2009-10-28 | [
"cond-mat"
] | Karen A. Hallberg |
cond-mat/9503092 | Comment on: Dynamic and Static Properties of the Randomly Pinned Flux
Array | We reconsider the model of the randomly pinned planar flux array (or the
two-dimensional XY-model with random fields and no vortices) in extensive Monte
Carlo simulations. We show that contrary to what has been reported recently
[Phys.\ Rev.\ Lett.\ {\bf 72}, 4133 (1994)] the disorder-averaged displacement
correlation ... | 1995-03-17 | 2009-10-28 | [
"cond-mat",
"hep-lat"
] | Heiko Rieger |
cond-mat/9503107 | Thermodynamic limit of the density matrix renormalization for the spin-1
Heisenberg chain | The density matrix renormalization group (``DMRG'') discovered by White has
shown to be a powerful method to understand the properties of many one
dimensional quantum systems. In the case where renormalization eventually
converges to a fixed point we show that quantum states in the thermodynamic
limit with periodic bou... | 1995-03-17 | 2016-08-31 | [
"cond-mat"
] | Stellan Ostlund and Stefan Rommer |
cond-mat/9503101 | Preprocessing in Attractor Neural Networks | Preprocessing the input patterns seems the simplest approach to invariant
pattern recognition by neural networks. The Fourier transform has been proposed
as an appropriate and elegant preprocessor. Nevertheless, we show in this work
that the performance of this kind of preprocessor is strongly affected by the
number of... | 1995-03-17 | 2015-06-25 | [
"cond-mat"
] | C.G. Carvalhaes, A.T. Costa Jr. and T.J.P. Penna |
cond-mat/9503100 | Efficient Monte Carlo Simulation of Biological Aging | A bit-string model of biological life-histories is parallelized, with
hundreds of millions of individuals. It gives the desired drastic decay of
survival probabilities with increasing age for 32 age intervals. | 1995-03-17 | 2015-06-25 | [
"cond-mat",
"q-bio"
] | T.J.P.Penna and D.Stauffer |
cond-mat/9503103 | On the Thermodynamic Stability of Odd-Frequency Superconductors | The thermodynamic stability of odd-frequency pairing states is investigated
within an Eliashberg-type framework. We find the rigorous result that in the
weak coupling limit a continuous transition from the normal state to a
spatially homogeneous odd-in-$\omega$ superconducting state is forbidden,
irrespective of detail... | 1995-03-17 | 2016-08-31 | [
"cond-mat"
] | R. Heid |
cond-mat/9503095 | Conductance fluctuations due to a single bistable scatterer in a weakly
connected conductor. | We study the effect of a single bistable scatterer on conductance of
mesoscopic conductors in the crossover regime from open to closed systems.
After the resistance of the contact between the metallic grain and bulk
electrode exceeds the resistance of a grain, the effect of a bistability is
enhanced and takes the unive... | 1995-03-17 | 2016-08-31 | [
"cond-mat"
] | Vladimir I. Fal'ko (Max-Planck-Institut fur Festkorperforschung,
Stuttgart, Germany) |
cond-mat/9503093 | From the Zero--bias Anomaly to the Coulomb Blockade: an Exactly Solvable
Model. | A microscopic theory of zero wavelength (q=0) interaction in finite--size
systems is proposed. Its exact solution interpolates between the Coulomb
blockade and the perturbative Altshuler--Aronov theory, in the strong and weak
interaction limits respectively. The tunneling density of states and the
quasiparticle life--t... | 1995-03-17 | 2008-02-03 | [
"cond-mat"
] | Alex Kamenev and Yuval Gefen |
cond-mat/9503097 | Quantum conductance fluctuations in 3D ballistic adiabatic wires. | Quantum conductance of 3D ballistic wires with idealy flat boundaries obeys
fluctuations with the properties quite distinguishable from those of universal
conductance fluctuations: Both their amplitude and the sensitivity to the
magnetic field flux $\Phi =HS$ penetrated into the sample cross-sectional area
$S$ are diff... | 1995-03-17 | 2016-08-31 | [
"cond-mat"
] | Vladimir I. Fal'ko (Max-Planck-Institut fur Festkorperforschung,
Stuttgart, Germany) and G.B. Lesovik (Institute of Solid State Physics,
Chernogolovka, Russia) |
cond-mat/9503090 | Non-Relativistic Fermions Coupled to Transverse Gauge-Fields: The
Single-Particle Green's Function in Arbitrary Dimension | We use a bosonization approach to calculate the single-particle Green's
function $G ( {\bf{r}} , \tau )$ of non-relativistic fermions coupled to
transverse gauge-fields in arbitrary dimension $d$. We find that in $d>3$
transverse gauge-fields do not destroy the Fermi liquid, although for $d < 6$
the quasi-particle damp... | 1995-03-17 | 2016-08-31 | [
"cond-mat"
] | Peter Kopietz |
cond-mat/9503091 | Sedimentation and Flow Through Porous Media: Simulating Dynamically
Coupled Discrete and Continuum Phases | We describe a method to address efficiently problems of two-phase flow in the
regime of low particle Reynolds number and negligible Brownian motion. One of
the phases is an incompressible continuous fluid and the other a discrete
particulate phase which we simulate by following the motion of single
particles. Interacti... | 1995-03-17 | 2016-08-31 | [
"cond-mat"
] | Stefan Schwarzer |
cond-mat/9503088 | On a class of integrable interacting electronic systems with
off-diagonal disorder | We report a class of {\it integrable} one-dimensional interacting electronic
sy$ with {\it off-diagonal disorder}. For these systems, the disorder can be
``gauged away,''and the spectrum can be mapped completely onto the spectrum of
the ordered problem, which can be solved by Bethe ansatz or by bosonization. We
study t... | 1995-03-16 | 2016-08-31 | [
"cond-mat"
] | A.H. Castro Neto, D.K. Campbell and Philip Phillips |
cond-mat/9503087 | GAPS IN THE HEISENBERG-ISING MODEL | We report on the closing of gaps in the ground state of the critical
Heisenberg-Ising chain at momentum $\pi$. For half-filling, the gap closes at
special values of the anisotropy $\Delta= \cos(\pi/Q)$, $Q$ integer. We explain
this behavior with the help of the Bethe Ansatz and show that the gap scales as
a power of th... | 1995-03-16 | 2016-08-31 | [
"cond-mat"
] | R. A. Roemer (JNCASR), H.-P. Eckle (Princeton) and B. Sutherland
(Utah) |
cond-mat/9503086 | Diffusion-Annihilation in the Presence of a Driving Field | We study the effect of an external driving force on a simple stochastic
reaction-diffusion system in one dimension. In our model each lattice site may
be occupied by at most one particle. These particles hop with rates
$(1\pm\eta)/2$ to the right and left nearest neighbouring site resp. if this
site is vacant and annih... | 1995-03-16 | 2015-06-25 | [
"cond-mat"
] | Gunter M. Sch\"utz |
cond-mat/9503082 | Sign Change of the Flux Flow Hall Effect in HTSC | A novel mechanism for the sign change of the Hall effect in the flux flow
region is proposed. The difference $\delta n $ between the electron density at
the center of the vortex core and that far outside the vortex causes the
additional contribution to the Hall conductivity $\delta\sigma_{xy}=-\delta n
ec/B$. This cont... | 1995-03-15 | 2007-05-23 | [
"cond-mat"
] | M. V. Feigel'man, V. B. Geshkenbein, A. I. Larkin, and V. M. Vinokur |
cond-mat/9503080 | Nonlinear Response Approach to Cooper Pair Tunneling in Ultrasmall SIS
Junctions | Single-charge tunneling in ultrasmall voltage biased SIS junctions in a
high-impedance electromagnetic environment is considered. The Cooper pair
current is calculated at T=0 on the basis of the elementary tunnel Hamiltonian
for quasiparticles. Therefore, the transfer of Cooper pairs emerges
automatically as an effect ... | 1995-03-15 | 2016-08-15 | [
"cond-mat"
] | A. H\"adicke and W. Krech |
cond-mat/9503085 | Strongly Interacting Spinless Fermions in D=1 and 2 Dimensions: A
Perturbative-Variational Approach | We propose a perturbative-variational approach to interacting fermion systems
on 1D and 2D lattices at half-filling. We address relevant issues such as the
existence of Long Range Order, quantum phase transitions and the evaluation of
ground state energy. In 1D our method is capable of unveiling the existence of
a crit... | 1995-03-15 | 2007-05-23 | [
"cond-mat",
"hep-th"
] | Miguel A. Martin-Delgado and German Sierra |
cond-mat/9503079 | Pulse-coupled relaxation oscillators: from biological synchronization to
Self-Organized Criticality | It is shown that globally-coupled oscillators with pulse interaction can
synchronize under broader conditions than widely believed from a theorem of
Mirollo \& Strogatz \cite{MirolloII}. This behavior is stable against frozen
disorder. Beside the relevance to biology, it is argued that synchronization in
relaxation osc... | 1995-03-15 | 2016-08-31 | [
"cond-mat",
"adap-org",
"nlin.AO"
] | Samuele Bottani |
cond-mat/9503084 | Quantum Smectic and Supersolid Order in Helium Films and Vortex Arrays | A flux liquid can condense into a smectic crystal in a pure layered
superconductor with the magnetic field oriented nearly parallel to the layers.
Similar order can arise in low temperature $^4$He films with a highly
anisotropic periodic substrate potential. If the smectic order is commensurate
with the layering, this ... | 1995-03-15 | 2016-08-31 | [
"cond-mat"
] | Leon Balents and David R. Nelson |
cond-mat/9503083 | Iterated Function System and Diffusion in the Presence of Disorder and
Traps | The escape probability $\xi_{x}$ from a site $x$ of a one-dimensional
disordered lattice with trapping is treated as a discrete dynamical evolution
by random iterations over nonlinear maps parametrized by the right and left
jump probabilities. The invariant measure of the dynamics is found to be a
multifractal. However... | 1995-03-15 | 2016-08-31 | [
"cond-mat"
] | Thomas Wichmann, Achille Giacometti and K. P. N. Murthy |
cond-mat/9503078 | Dynamic response of mesoscopic metal rings and thermodynamics at
constant particle number | We show by means of simple exact manipulations that the thermodynamic
persistent current $I ( \phi , N )$ in a mesoscopic metal ring threaded by a
magnetic flux $\phi$ at constant particle number $N$ agrees even beyond linear
response with the dynamic current $I_{dy} ( \phi , N )$ that is defined via the
response to a ... | 1995-03-15 | 2009-10-28 | [
"cond-mat"
] | Jens Fricke and Peter Kopietz |
cond-mat/9503077 | Statistics of random quasi 1D Hamiltonian with slowly varying
parameters. Painlev\'{e} again. | The statistics of random band--matrices with width and strength of the band
slowly varying along the diagonal is considered. The Dyson equation for the
averaged Green function close to the edge of spectrum is reduced to the
Painlev\'{e} I equation. The analytical properties of the Green function allow
to fix the soluti... | 1995-03-15 | 2016-08-31 | [
"cond-mat",
"chao-dyn",
"hep-th",
"nlin.CD"
] | P.G.Silvestrov |
cond-mat/9503081 | Charge Transfer Excitons and Possible Exitonic Pairing in the Extended
Three Band Hubbard Model | Exact diagonalisations of the extended Hubbard model are performed. In the
insulating regime it is shown that the nearest neighbour copper-oxygen
repulsion, $V$, leads to Frenkel excitons in the charge transfer gap at values
of $V$ of the order of copper-oxygen hybridisation, $t$. In the metallic regime
it is shown tha... | 1995-03-15 | 2009-10-28 | [
"cond-mat"
] | C. Vermeulen, W. Barford and E. R. Gagliano |
cond-mat/9503073 | A Method to Study Relaxation of Metastable Phases: Macroscopic
Mean-Field Dynamics | We propose two different macroscopic dynamics to describe the decay of
metastable phases in many-particle systems with local interactions. These
dynamics depend on the macroscopic order parameter $m$ through the restricted
free energy $F(m)$ and are designed to give the correct equilibrium
distribution for $m$. The con... | 1995-03-14 | 2016-08-31 | [
"cond-mat",
"hep-lat",
"mtrl-th"
] | J. Lee, M.A. Novotny, and P.A. Rikvold |
cond-mat/9503074 | How (Super) Rough is the Glassy Phase of a Crystalline Surface with a
Disordered Substrate? | We discuss the behavior of a crystalline surface with a disordered substrate.
We focus on the possible existence of a {\em super-rough} glassy phase, with
height-height correlation functions which vary as the square logarithm of the
distance. With numerical simulations we establish the presence of such a
behavior, that... | 1995-03-14 | 2009-10-28 | [
"cond-mat",
"hep-lat"
] | Enzo Marinari, Remi Monasson, Juan J. Ruiz-Lorenzo |
cond-mat/9503075 | Enhancement of localization length for two interacting kicked rotators | We study the effect of coherent propagation of two interacting particles in a
disordered potential. The dependence of the enhancement factor for coherent
localization length due to interaction is investigated numerically in the model
of quantum chaos. The effect of interaction for two particles in many
dimensions is al... | 1995-03-14 | 2016-08-31 | [
"cond-mat",
"chao-dyn",
"nlin.CD"
] | Fausto Borgonovi, Dima L. Shepelyansky |
cond-mat/9503076 | Fractal versus QuasiClassical Diffusive Transport in a class of quantum
systems | We compare the properties of transmission across one-dimensional finite
samples which are associated with two types of "quantum diffusion", one related
to a classical chaotic dynamics, the other to a multifractal energy spectrum.
We numerically investigate models exhibiting one or both of these features, and
we find in... | 1995-03-14 | 2016-08-31 | [
"cond-mat",
"chao-dyn",
"nlin.CD"
] | Fausto Borgonovi, Italo Guarneri |
cond-mat/9503069 | Scaling in Late Stage Spinodal Decomposition with Quenched Disorder | We study the late stages of spinodal decomposition in a Ginzburg-Landau mean
field model with quenched disorder. Random spatial dependence in the coupling
constants is introduced to model the quenched disorder. The effect of the
disorder on the scaling of the structure factor and on the domain growth is
investigated in... | 1995-03-13 | 2016-08-31 | [
"cond-mat"
] | M.F. Gyure, S.T. Harrington, R. Strilka, and H.E. Stanley (Center for
Polymer Studies and Dept. of Physics, Boston University) |
cond-mat/9503067 | Magnetic Frustration and Spin-Charge Separation in 2D Strongly
Correlated Electron Systems | I propose that the ground state of the 2D $t$-$J$ model near half-filling
with $J/t\sim1/3$ has both ferromagnetic and antiferromagnetic fluctuations
leading to a magnetically frustrated ground state. I further argue that the
frustrated state is spin-charge separated to account for the observed behavior
of the equal ti... | 1995-03-13 | 2016-08-31 | [
"cond-mat"
] | William Putikka, NHMFL |
cond-mat/9503071 | Properties of Odd Gap Superconductors | We discuss the class of superconductors which have pairing correlations which
are odd in frequency, as introduced originally by Berezinskii and more recently
by Balatsky and Abrahams. As follows from the equations of motion, a natural
definition of the thermodynamic order parameter of the odd-pairing state is the
expec... | 1995-03-13 | 2016-08-31 | [
"cond-mat"
] | Elihu Abrahams (Rutgers), A.V. Balatsky (Los Alamos), D.J. Scalapino
(Santa Barbara), and J.R. Schrieffer (Florida State) |
cond-mat/9503070 | RELAXATION TO SPIN GLASS GROUND STATE IN ONE TO SIX DIMENSIONS | In the +-J Edwards-Anderson spin glass, we find by Monte Carlo simulation the
(approximate) ground state energy. Also, we check how in the relaxation towards
this ground state the fraction of never flipped spins diminishes with time. | 1995-03-13 | 2015-06-25 | [
"cond-mat"
] | D. Stauffer and P.M.C. de Oliveira |
cond-mat/9503072 | Phason elasticity of a three-dimensional quasicrystal: transfer-matrix
method | We introduce a new transfer matrix method for calculating the thermodynamic
properties of random-tiling models of quasicrystals in any number of
dimensions, and describe how it may be used to calculate the phason elastic
properties of these models, which are related to experimental measurables such
as phason Debye-Wall... | 1995-03-13 | 2016-08-31 | [
"cond-mat"
] | M. E. J. Newman and C. L. Henley (LASSP, Cornell University) |
cond-mat/9503068 | Dynamics of overlapping vortices in complex scalar fields | We investigate dynamics of overlapping vortices in the nonlinear
Schr\"{o}dinger equation, the nonlinear heat equation and in the equation with
an intermediate Schr\"{o}dinger-diffusion dynamics. Because of formal
similarity on a perturbative level we discuss also the nonlinear wave equation
(Goldstone model). Special ... | 1995-03-13 | 2008-02-03 | [
"cond-mat",
"hep-ph",
"hep-th"
] | Jacek Dziarmaga |
cond-mat/9503066 | Exact Calculation of the Vortex-Antivortex Interaction Energy in the
Anisotropic 3D XY-model | We have developed an exact method to calculate the vortex-antivortex
interaction energy in the anisotropic 3D-XY model. For this calculation, dual
transformation which is already known for the 2D XY-model was extended. We
found an explicit form of this interaction energy as a function of the
anisotropic ratio and the s... | 1995-03-13 | 2016-08-31 | [
"cond-mat"
] | Mahn-Soo Choi and Sung-Ik Lee |
cond-mat/9503065 | Anisotropic Diffusion-Limited Reactions with Coagulation and
Annihilation | One-dimensional reaction-diffusion models A+A -> 0, A+A -> A, and $A+B -> 0,
where in the latter case like particles coagulate on encounters and move as
clusters, are solved exactly with anisotropic hopping rates and assuming
synchronous dynamics. Asymptotic large-time results for particle densities are
derived and dis... | 1995-03-12 | 2011-10-26 | [
"cond-mat"
] | Vladimir Privman, Antonio M.R. Cadilhe, M. Lawrence Glasser |
cond-mat/9503063 | Dynamics of Nonequilibrium Deposition with Diffusional Relaxation | Models of adhesion of extended particles on linear and planar substrates are
of interest in interpreting surface deposition in colloid, polymer, and certain
biological systems. An introduction is presented to recent theoretical advances
in modeling these processes. Effects of diffusional relaxation are surveyed in
deta... | 1995-03-12 | 2016-11-03 | [
"cond-mat"
] | Vladimir Privman |
cond-mat/9503064 | Exact Solutions of Anisotropic Diffusion-Limited Reactions with
Coagulation and Annihilation | We report exact results for one-dimensional reaction-diffusion models A+A ->
inert, A+A -> A, and A+B -> inert, where in the latter case like particles
coagulate on encounters and move as clusters. Our study emphasized anisotropy
of hopping rates; no changes in universal properties were found, due to
anisotropy, in all... | 1995-03-12 | 2010-09-22 | [
"cond-mat"
] | Vladimir Privman, Antonio M.R. Cadilhe, M. Lawrence Glasser |
cond-mat/9503062 | Series Analysis of Tricritical Behavior: Mean-Field Model and Slicewise
Pade Approximants | A mean-field model is proposed as a test case for tricritical series analyses
methods. Derivation of the 50th order series for the magnetization is reported.
As the first application this series is analyzed by the traditional slicewise
Pade approximant method popular in earlier studies of tricriticality. | 1995-03-12 | 2010-10-12 | [
"cond-mat"
] | Joan Adler, Vladimir Privman |
cond-mat/9503060 | Nonuniversality in Imbibition | We report an imbibition experiment in 2D random porous media in which height
- height correlation function grows with a nonuniversal exponent; rather it
depends on evaporation. We present an imbibition model which is consistent with
the experiment. It also takes account of the size of the diffusing particles
and can ea... | 1995-03-11 | 2016-08-31 | [
"cond-mat"
] | P. B. Sunil Kumar and Debnarayan Jana |
cond-mat/9503061 | Stability of periodic domain structures in a two-dimensional dipolar
model | We investigate the energetic ground states of a model two-phase system with
1/r^3 dipolar interactions in two dimensions. The model exhibits spontaneous
formation of two kinds of periodic domain structure. A striped domain structure
is stable near half filling, but as the area fraction is changed, a transition
to a hex... | 1995-03-11 | 2009-10-28 | [
"cond-mat"
] | Kwok-On Ng and David Vanderbilt (Department of Physics and Astronomy,
Rutgers University) |
cond-mat/9503059 | Energy Gap Induced by Impurity Scattering: New Phase Transition in
Anisotropic Superconductors | It is shown that layered superconductors are subjected to a phase transition
at zero temperature provided the order parameter (OP) reverses its sign on the
Fermi-surface but its angular average is finite. The transition is regulated by
an elastic impurity scattering rate $1/\tau$. The excitation energy spectrum,
being ... | 1995-03-10 | 2016-08-31 | [
"cond-mat"
] | S. V. Pokrovsky and V. L. Pokrovsky |
cond-mat/9503055 | A Constrained Path Quantum Monte Carlo Method for Fermion Ground States | We propose a new quantum Monte Carlo algorithm to compute fermion
ground-state properties. The ground state is projected from an initial
wavefunction by a branching random walk in an over-complete basis space of
Slater determinants. By constraining the determinants according to a trial
wavefunction $|\Psi_T \rangle$, w... | 1995-03-10 | 2016-08-31 | [
"cond-mat"
] | Shiwei Zhang, J. Carlson, and J.E. Gubernatis |
cond-mat/9503057 | The Fate of Lifshitz Tails in Magnetic Fields | We investigate the integrated density of states of the Schr\"odinger operator
in the Euclidean plane with a perpendicular constant magnetic field and a
random potential. For a Poisson random potential with a non-negative
algebraically decaying single-impurity potential we prove that the leading
asymptotic behaviour for... | 1995-03-10 | 2015-06-25 | [
"cond-mat"
] | Kurt Broderix, Dirk Hundertmark, Werner Kirsch, Hajo Leschke |
cond-mat/9503058 | Spectral Statistics in the Lowest Landau Band | We study the spectral statistics in the center of the lowest Landau band of a
2D disordered system with smooth potential and strong transverse magnetic
field. Due to the finite size of the system, the energy range in which there
are extended states is finite as well. The behavior in this range can be viewed
as the anal... | 1995-03-10 | 2016-08-31 | [
"cond-mat",
"chao-dyn",
"nlin.CD"
] | Mario Feingold (Dept. of Physics, Ben-Gurion University), Yshai
Avishai (Dept. of Physics, Ben-Gurion University), and Richard Berkovits
(Dept. of Physics, Bar-Ilan University ) |
cond-mat/9503054 | Superconductivity in the two dimensional Hubbard Model. | Quasiparticle bands of the two-dimensional Hubbard model are calculated using
the Roth two-pole approximation to the one particle Green's function. Excellent
agreement is obtained with recent Monte Carlo calculations, including an
anomalous volume of the Fermi surface near half-filling, which can possibly be
explained ... | 1995-03-09 | 2016-08-31 | [
"cond-mat",
"supr-con"
] | J. Beenen and D.M. Edwards (Imperial College London) |
cond-mat/9503051 | Mean-Field Theory for the Spin-Triplet Exciton Liquid in Quantum Wells | Using a mean-field theory, we study the possible existence of a spin-triplet
intersubband exciton liquid ground state in semiconductor quantum well systems
as a function of the electronic density and the strength of the intersubband
Coulomb interaction matrix element at low temperatures. We find the excitonic
phase to ... | 1995-03-09 | 2016-08-31 | [
"cond-mat"
] | R. J. Radtke and S. Das Sarma |
cond-mat/9503056 | Random systems and replica field theory | Contents:
I. Introduction
II. Manifolds in random media
III. Thermal fluctuations without disorder
IV. Random forces
V. Random potential: variational approach
VI. Physical interpretation of the solution | 1995-03-09 | 2016-08-31 | [
"cond-mat",
"hep-th"
] | Marc Mezard |
cond-mat/9503050 | Microscopic Modeling of the Growth of Order in an Alloy: Nucleated and
Continuous Ordering | We study the early-stages of ordering in $Cu_3 Au$ using a model Hamiltonian
derived from the effective medium theory of cohesion in metals: an approach
providing a microscopic description of interatomic interactions in alloys. Our
simulations show a crossover from a nucleated growth regime to a region where
the orderi... | 1995-03-09 | 2016-08-31 | [
"cond-mat",
"mtrl-th"
] | Bulbul Chakraborty and Zhigang Xi (Brandeis University) |
cond-mat/9503045 | Weak Coupling Phase Diagram of the Two Chain Hubbard Model | We present a general method for determining the phase diagram of systems of a
finite number of one dimensional Hubbard--like systems coupled by
single--particle hopping with weak interactions. The technique is illustrated
by detailed calculations for the two--chain Hubbard model, providing the first
controlled results ... | 1995-03-09 | 2016-08-31 | [
"cond-mat"
] | Leon Balents and Matthew P. A. Fisher |
cond-mat/9503052 | Scaling in Interaction-Assisted Coherent Transport | The pair localization length $L_2$ of two interacting electrons in
one--dimensional disordered systems is studied numerically. Using two direct
approaches, we find $L_2 \propto L_1^{\alpha}$, where $L_1$ is the one-electron
localization length and $\alpha \approx 1.65$. This demonstrates the
enhancement effect proposed... | 1995-03-09 | 2016-08-31 | [
"cond-mat"
] | K. Frahm, A. Mueller-Groeling, J.-L. Pichard and D. Weinmann |
cond-mat/9503046 | The Hofstadter Spectrum and Photoluminescence | The observability of the Hofstadter spectrum generated by a Wigner crystal
using photoluminescence techniques is studied. Itinerant hole geometries are
examined, in which a hole may combine directly with electrons in the lattice.
It is found that when the effect of lattice distortions of the WC due to
interactions with... | 1995-03-09 | 2007-05-23 | [
"cond-mat"
] | Lian Zheng and H.A. Fertig (Univ. of Kentucky) |
cond-mat/9503049 | THERMODYNAMICS OF A BROWNIAN BRIDGE POLYMER MODEL IN A RANDOM
ENVIRONMENT | We consider a directed random walk making either 0 or $+1$ moves and a
Brownian bridge, independent of the walk, conditioned to arrive at point $b$ on
time $T$. The Hamiltonian is defined as the sum of the square of increments of
the bridge between the moments of jump of the random walk and interpreted as an
energy fun... | 1995-03-09 | 2016-08-31 | [
"cond-mat"
] | Servet Martinez, Dimitri Petritis |
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