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/9404094 | Towards exact bosonization of the Calogero-Sutherland model | We demonstrate that the exact form-factors of the Calogero-Sutherland model
which were recently found in Ref.[10] in confirmation of the congectures
earlier made by Haldane (Ref.[9]) can be reproduced in the framework of some
bosonization procedure in momentum space. This observation implies a
possibility of an exact b... | 1994-04-28 | 2009-10-22 | [
"cond-mat"
] | D.V.Khveshchenko |
cond-mat/9404091 | Differential equation for a correlation function of the spin-${1\over2}$
Heisenberg chain | We consider the probability to find a string of $x$ adjacent parallel spins
in the antiferromagnetic ground state of the model (in a magnetic field). We
derive a system of integro-difference equations which define this probability.
This system is completely integrable, it has Lax representation and a
corresponding Riem... | 1994-04-28 | 2009-10-22 | [
"cond-mat",
"hep-th"
] | Holger Frahm, Alexander R. Its and Vladimir E. Korepin |
cond-mat/9404088 | Non-Equilibrium Magnetization in a Ballistic Quantum Dot | We show that Aharonov-Bohm (AB) oscillations in the magnetic moment of an
integrable ballistic quantum dot can be destroyed by a time dependent magnetic
flux. The effect is due to a nonequilibrium population of perfectly coherent
electronic states. For real ballistic systems the equilibrization process,
which involves ... | 1994-04-27 | 2009-10-22 | [
"cond-mat"
] | T. Swahn, E. N. Bogachek, Yu. M. Galperin, M. Jonson, and R. I.
Shekhter |
cond-mat/9404087 | Three-State Anti-ferromagnetic Potts Model in Three Dimensions:
Universality and Critical Amplitudes | We present the results of a Monte Carlo study of the three-dimensional
anti-ferromagnetic 3-state Potts model. We compute various cumulants in the
neighbourhood of the critical coupling. The comparison of the results with a
recent high statistics study of the 3D XY model strongly supports the
hypothesis that both model... | 1994-04-27 | 2009-10-22 | [
"cond-mat"
] | A.P. Gottlob and M. Hasenbusch |
cond-mat/9404086 | Localized-orbital computation of linear and nonlinear susceptibilities | We present a method to compute high-order derivatives of the total energy
which can be used in the framework of density functional theory. We provide a
proof of the $2n+1$ theorem for a general class of energy functionals in which
the orbitals are not constrained to be orthonormal. Furthermore, by combining
this result... | 1994-04-27 | 2007-05-23 | [
"cond-mat"
] | Andrea Dal Corso and Francesco Mauri |
cond-mat/9404089 | Electronic structure calculations and molecular dynamics simulations
with linear system-size scaling | We present a method for total energy minimizations and molecular dynamics
simulations based either on tight-binding or on Kohn-Sham hamiltonians. The
method leads to an algorithm whose computational cost scales linearly with the
system size. The key features of our approach are
(i) an orbital formulation with single ... | 1994-04-27 | 2009-10-22 | [
"cond-mat"
] | Francesco Mauri and Giulia Galli |
cond-mat/9404084 | Universal Spectral Correlations in Diffusive Quantum Systems | We have studied numerically several statistical properties of the spectra of
disordered electronic systems under the influence of an Aharonov Bohm flux
$\varphi$, which acts as a time--reversal symmetry breaking parameter. The
distribution of curvatures of the single electron energy levels has a modified
Lorentz form w... | 1994-04-26 | 2009-10-22 | [
"cond-mat"
] | Daniel Braun and Gilles Montambaux |
cond-mat/9404082 | Aging and domain growth in the two--dimensional Ising spin glass model | Interrupted aging in the two-dimensional Ising spin glass model with Gaussian
couplings is established and investigated via extensive Monte-Carlo
simulations. The spin autocorrelation function scales with $t/\tau(t_w)$, where
$t_w$ is the waiting time and $\tau$ is equal to $t_w$ for waiting times
smaller than the equi... | 1994-04-26 | 2015-06-25 | [
"cond-mat",
"hep-lat"
] | H. Rieger B.Steckemetz and M. Schreckenberg |
cond-mat/9404083 | Phonon Properties of Knbo3 and Ktao3 from First-Principles Calculations | The frequencies of transverse-optical $\Gamma$ phonons in KNbO$_3$ and
KTaO$_3$ are calculated in the frozen-phonon scheme making use of the
full-potential linearized muffin-tin orbital method. The calculated frequencies
in the cubic phase of KNbO$_3$ and in the tetragonal ferroelectric phase are in
good agreement with... | 1994-04-26 | 2009-10-22 | [
"cond-mat"
] | A.V.Postnikov, T.Neumann, and G.Borstel |
cond-mat/9404085 | Spin-1/2 Heisenberg-Antiferromagnet on the Kagome Lattice: High
Temperature Expansion and Exact Diagonalisation Studies | For the spin-$\frac{1}{2}$ Heisenberg antiferromagnet on the Kagom\'e lattice
we calculate the high temperature series for the specific heat and the
structure factor. A comparison of the series with exact diagonalisation studies
shows that the specific heat has further structure at lower temperature in
addition to a hi... | 1994-04-26 | 2009-10-22 | [
"cond-mat"
] | N. Elstner and A. P. Young (Physics Department, University of
California, Santa Cruz, CA) |
cond-mat/9404081 | Relation of Extended Van Hove Singularities to High-Temperature
Superconductivity within Strong-Coupling Theory | Recent angle-resolved photoemission (ARPES) experiments have indicated that
the electronic dispersion in some of the cuprates possesses an extended saddle
point near the Fermi level which gives rise to a density of states that
diverges like a power law instead of the weaker logarithmic divergence usually
considered. We... | 1994-04-26 | 2009-10-22 | [
"cond-mat"
] | R. J. Radtke and M. R. Norman |
cond-mat/9404076 | Pseudogap Formation in the Symmetric Anderson Lattice Model | We present self-consistent calculations for the self-energy and magnetic
susceptibility of the 2D and 3D symmetric Anderson lattice Hamiltonian, in the
fluctuation exchange approximation. At high temperatures, strong f-electron
scattering leads to broad quasiparticle spectral functions, a reduced
quasiparticle band gap... | 1994-04-25 | 2009-10-22 | [
"cond-mat"
] | P.G. McQueen, D.W. Hess and J.W. Serene |
cond-mat/9404079 | A model for the shapes of islands and pits on (111) surfaces of fcc
metals | It is experimentally observed that adsorbate atoms and vacancies on (111)
surfaces of fcc metals cluster into islands which are approximately hexagonal,
but which on closer inspection turn out to have equilibrium facets which
alternate in length $ABABAB$ around the six sides of the island. By contrast,
previous theoret... | 1994-04-25 | 2009-10-22 | [
"cond-mat"
] | G. T. Barkema, M. E. J. Newman and M. Breeman |
cond-mat/9404080 | Statistical Mechanics of Relativistic Aynon-like Systems | To study the manifestation of the Aharonov-Bohm effect in many-body systems
we consider the statistical mechanics of the Gross-Neveu model on a ring (1+1
dimensions) and on a cylinder (2+1 dimensions) with a thin solenoid coinciding
with the axis. For such systems with a non-trivial magnetic flux ($\theta$)
many thermo... | 1994-04-25 | 2007-05-23 | [
"cond-mat"
] | Suzhou Huang and Bernd Schreiber |
cond-mat/9404078 | Persistent Current of Free Electrons in the Plane | Predictions of Akkermans et al. are essentially changed when the Krein
spectral displacement operator is regularized by means of zeta function.
Instead of piecewise constant persistent current of free electrons on the plane
one has a current which varies linearly with the flux and is antisymmetric with
regard to all ti... | 1994-04-25 | 2016-08-14 | [
"cond-mat",
"hep-th"
] | Alain Comtet, Alexander Moroz, and St\'ephane Ouvry |
cond-mat/9404077 | Soft Disorder Effects in the Conductance Quantization in Quantum Point
Contacts: Indirect Backscattering Statistics | The breakdown of conductance quantization in a quantum point contact in the
presence of random long-range impurity potential is discussed. It is shown that
in the linear response regime a decisive role is played by the indirect
backscattering mechanism via quasilocalized states at the Fermi level; this can
provide much... | 1994-04-25 | 2007-05-23 | [
"cond-mat"
] | A.M. Zagoskin, S.N. Rashkeev, R.I. Shekhter, and G. Wendin |
cond-mat/9404075 | Long-Distance Universality of Laughlin State and Calogero-Sutherland
Model | We study the universal long-distance behaviour of the Laughlin state for the
fractional quantum Hall effect and the ground state of the Calogero-Sutherland
model (one dimensional $1/r^2$ interaction model). In particular, it is shown
that these two wave functions coincide exactly when Laughlin state is confined
in a na... | 1994-04-23 | 2015-06-25 | [
"cond-mat"
] | Satoshi Iso |
cond-mat/9404074 | Theoretical Study of Friction: A Case of One-Dimensional Clean Surfaces | A new method has been proposed to evaluate the frictional force in the
stationary state. This method is applied to the 1-dimensional model of clean
surfaces. The kinetic frictional force is seen to depend on velocity in
general, but the dependence becomes weaker as the maximum static frictional
force increases and in t... | 1994-04-22 | 2009-10-22 | [
"cond-mat"
] | Hiroshi Matsukawa and Hidetoshi Fukuyama |
cond-mat/9404072 | Persistent Current of a One-Dimensional Wigner Crystal-Ring | We calculate the magnetic moment (`persistent current') in a strongly
correlated electron system --- a Wigner crystal --- in a one-dimensional
ballistic ring. The flux- and temperature dependence of the persistent current
is shown to be essentially the same as for a system of non-interacting
electrons. In contrast, by ... | 1994-04-22 | 2007-05-23 | [
"cond-mat"
] | I. V. Krive, R. I. Shekhter, S. M. Girvin, and M. Jonson |
cond-mat/9404073 | Thermodynamics and Excitation Spectrum of a Quasi-One-Dimensional
Superconductor in a High Magnetic Field | At high magnetic field, the semiclassical approximation which underlies the
Ginzburg-Landau theory of the mixed state of type II superconductors breaks
down. In a quasi-1D superconductor with an {\it open Fermi surface}, a high
magnetic field stabilizes a cascade of superconducting phases which ends in a
strong reentra... | 1994-04-22 | 2009-10-22 | [
"cond-mat"
] | N. Dupuis |
cond-mat/9404065 | Perturbational Approach to the Anderson Model: New Results from a
Post-Nca Treatment | We present selected results from combined analytical and numerical studies of
the Anderson-impurity model within the framework of infinite order perturbation
theory with respect to the hybridization. Our approximation goes considerably
beyond the well known non\-cross\-ing approximation (NCA): The re-summations
include... | 1994-04-21 | 2009-10-22 | [
"cond-mat"
] | F.B. Anders and N. Grewe |
cond-mat/9404066 | Statistical Dependence and Related Topics | On the basis of the dynamical interpretation of Monte Carlo simulations, we
discuss the relation of the equilibrium relaxation time, the susceptibility and
the statistical error. We introduce a new quantity called {\it the statistical
dependence time} $\tau_{dep}$, which gives the reduction factor for the
statistical d... | 1994-04-21 | 2007-05-23 | [
"cond-mat"
] | Macoto Kikuchi, Nobuyasu Ito, and Yutaka Okabe (Department of Physics,
Osaka University Toyonaka 560, Japan) |
cond-mat/9404069 | Phase Separation Dynamics in a Concentration Gradient | Phase separation dynamics with an initially non-uniform concentration are
studied. Critical and off-critical behavior is observed simultaneously. A
mechanism for an expanding phase separated region is demonstrated and the time
dependence of the concentration is determined. The final equilibrium state
consists of a plan... | 1994-04-21 | 2009-10-22 | [
"cond-mat"
] | A.M. Lacasta, J.M. Sancho and Chuck Yeung |
cond-mat/9404068 | Mapping of the Sutherland Hamiltonian to anyons on a ring authors | It is demonstrated that the Sutherland Hamiltonian is equivalent to particles
interacting with the vector statistical interaction on the rim of a circle, to
within a nonsingular gauge transformation. | 1994-04-21 | 2007-05-23 | [
"cond-mat"
] | Shuxi Li and R.K. Bhaduri |
cond-mat/9404071 | Single Particle Relaxation in a Random Magnetic Field | We consider the single particle relaxation rate of 2D electrons subject to a
random magnetic field. The density of states (DOS) oscillations in a uniform
magnetic field (in addition to a random one) are studied. We define a gauge
invariant single particle relaxation time as a parameter describing the
amplitude of DOS o... | 1994-04-21 | 2007-05-23 | [
"cond-mat"
] | E.Altshuler, A.G.Aronov, A.D.Mirlin, P.Woelfle |
cond-mat/9404070 | Localization of Charged Quantum Particles in a Static Random Magnetic
Field | We consider a charged quantum particle in a random magnetic field with
Gaussian, delta-correlated statistics. We show that although the single
particle properties are peculiar, two particle quantities such as the diffusion
constant can be calculated in perturbation theory. We map the problem onto a
non-linear sigma-mod... | 1994-04-21 | 2009-10-22 | [
"cond-mat"
] | A.G.Aronov, A.D.Mirlin and P.Woelfle |
cond-mat/9404067 | Calculation of the singlet-triplet gap of the antiferromagnetic
Heisenberg Model on the ladder | The ground state energy and the singlet-triplet energy gap of the
antiferromagnetic Heisenberg model on a ladder is investigated using a mean
field theory and the density matrix renormalization group. Spin wave theory
shows that the corrections to the local magnetization are infinite. This
indicates that no long range ... | 1994-04-21 | 2009-10-22 | [
"cond-mat"
] | M. Azzouz, Liang Chen, and S. Moukouri |
cond-mat/9404063 | Gapless Phases in an s=1/2 Quantum Spin Chain with Bond Alternation | The $S=1/2$ XXZ spin chain with the staggered XY anisotropy $$ H = J
\sum_{n}^{N} (S^{x}_{n} S^{x}_{n+1} + S^{y}_{n} S^{y}_{n+1} + \Delta S^{z}_{n}
S^{z}_{n+1}) - \delta \sum_{n}^{N} (-1)^{n} (S^{x}_{n} S^{x}_{n+1} - S^{y}_{n}
S^{y}_{n+1}) $$ is shown to possess gapless, Luttinger-liquid-like phases in a
wide range of ... | 1994-04-20 | 2009-10-22 | [
"cond-mat"
] | A. A. Nersesyan and A.Luther |
cond-mat/9404064 | Non-equilibrium Dynamics of Finite Interfaces | We present an exact solution to an interface model representing the dynamics
of a domain wall in a two-phase Ising system. The model is microscopically
motivated, yet we find that in the scaling regime our results are consistent
with those obtained previously from a phenomenological, coarse-grained Langevin
approach. | 1994-04-20 | 2016-08-14 | [
"cond-mat"
] | D. B. Abraham, T. J. Newman and G. M. Sch\"utz |
cond-mat/9404058 | Optical absorption spectra of A6C60: Reduction of effective
Coulombinteractions | Optical absorption spectra of C60^6- are theoretically investigated in order
to analyze the optical properties of alkali metal doped fullerites A6C60. We
use a tight binding model with long ranged Coulomb interactions and bond
disorder. Optical spectra are obtained by the Hartree-Fock approximation and
the CI method. T... | 1994-04-19 | 2009-10-22 | [
"cond-mat"
] | Kikuo Harigaya (ETL - Japan) |
cond-mat/9404061 | Correlated local distortions of the TlO layers in Tl$_2$Ba$_2$CuO$_{y}$:
An x-ray absorption study | We have used the XAFS (x-ray-absorption fine structure) technique to
investigate the local structure about the Cu, Ba, and Tl atoms in orthorhombic
Tl-2201 with a superconducting transition temperature T$_c$=60 K. Our results
clearly show that the O(1), O(2), Cu, and Ba atoms are at their ideal sites as
given by the di... | 1994-04-19 | 2016-08-14 | [
"cond-mat"
] | G. G. Li, F. Bridges, J. B. Boyce, T. Claeson, C. Str\"om, S.-G.
Eriksson, S. D. Conradson |
cond-mat/9404060 | The susceptibility and excitation spectrum of (VO)$_2$P$_2$O$_7$ in
ladder and dimer chain models | We present numerical results for the magnetic susceptibility of a Heisenberg
antiferromagnetic spin ladder, as a function of temperature and the spin-spin
interaction strengths $J_\perp$ and $J_{||}$. These are contrasted with new
bulk limit results for the dimer chain. A fit to the experimental
susceptibility of the c... | 1994-04-19 | 2009-10-22 | [
"cond-mat"
] | T. Barnes and J. Riera |
cond-mat/9404059 | Exact thermostatic results for the n-vector model on the harmonic chain | Revised Version with corrections of misprints. | 1994-04-19 | 2009-10-22 | [
"cond-mat",
"nlin.SI",
"solv-int"
] | Georg Junker and Hajo Leschke |
cond-mat/9404062 | Susceptibility of the Spin 1/2 Heisenberg Antiferromagnetic Chain | Highly accurate results are presented for the susceptibility, $\chi (T)$ of
the $s=1/2$ Heisenberg antiferromagnetic chain for all temperatures, using the
Bethe ansatz and field theory methods. After going through a rounded peak,
$\chi (T)$ approaches its asympotic zero-temperature value with infinite slope. | 1994-04-19 | 2009-10-22 | [
"cond-mat",
"hep-th"
] | Sebastian Eggert, Ian Affleck, Minoru Takahashi |
cond-mat/9404057 | Novel A-B type oscillations in a 2-D electron gas in inhomogenous
magnetic fields | We present results from a quantum and semiclassical theoretical study of the
$\rho_{xy}$ and $\rho_{xx}$ resistivities of a high mobility 2-D electron gas
in the presence of a dilute random distribution of tubes with magnetic flux
$\Phi$ and radius $R$, for arbitrary values of $k_f R$ and $F=e\Phi/h$. We
report on nove... | 1994-04-19 | 2009-10-22 | [
"cond-mat"
] | Michel Carreau and Jorge V. Jos\'e |
cond-mat/9404052 | Statistics transmutations in two-dimensional systems and the fractional
quantum Hall effect | Statistics transmutations to composite fermions in
fractional-quantum-Hall-effect systems are considered in the Hartree-Fock
approximation and in the RPA. The Hartree-Fock ground-state energy shows that
the transmutations are not energetically preferable. Within the RPA it is found
that the system exhibits a fractional... | 1994-04-18 | 2009-10-22 | [
"cond-mat"
] | P. Sitko |
cond-mat/9404050 | Saddle Points Stability in the Replica Approach Off Equilibrium | We study the replica free energy surface for a spin glass model near the
glassy temperature. In this model the simplicity of the equilibrium solution
hides non trivial metastable saddle points. By means of the stability analysis
performed for one and two real replicas constrained, an interpretation for some
of them is ... | 1994-04-18 | 2009-10-22 | [
"cond-mat"
] | Marco E. Ferrero and Miguel A. Virasoro |
cond-mat/9404055 | Universal parametric correlations in the transmission eigenvalue spectra
of disordered conductors | We study the response of the transmission eigenvalue spectrum of disordered
metallic conductors to an arbitrary external perturbation. For systems without
time-reversal symmetry we find an exact non-perturbative solution for the
two-point correlation function, which exhibits a new kind of universal behavior
characteris... | 1994-04-18 | 2009-10-22 | [
"cond-mat"
] | A. M. S. Macedo |
cond-mat/9404049 | Density-of-States Calculations and Multiple-Scattering Theory for
Photons | The density of states for a finite or an infinite cluster of scatterers in
the case of both electrons and photons can be represented in a general form as
the sum over all Krein-Friedel contributions of individual scatterers and a
contribution due to the presence of multiple scatterers. The latter is given by
the sum ov... | 1994-04-18 | 2008-02-03 | [
"cond-mat",
"chao-dyn",
"nlin.CD"
] | Alexander Moroz |
cond-mat/9404053 | Two dimensional electron transport in disordered and ordered
distributions of magnetic flux vortices | We have considered the conductivity properties of a two dimensional electron
gas (2DEG) in two different kinds of inhomogeneous magnetic fields, i.e.\ a
disordered distribution of magnetic flux vortices, and a periodic array of
magnetic flux vortices. The work falls in two parts. In the first part we show
how the phase... | 1994-04-18 | 2016-08-14 | [
"cond-mat"
] | Mads Nielsen and Per Hedeg{\aa}rd (Niels Bohr Institute, Copenhagen) |
cond-mat/9404056 | Temperature dependence of the superconducting gap anisotropy in
Bi$_{2}$Sr$_{2}$Ca$_{1}$Cu$_{2}$O$_{8+x}$ | We present the first detailed data of the momentum-resolved, temperature
dependence of the superconducting gap of $Bi_{2}Sr_{2}Ca_{1}Cu_{2}O_{8+x}$,
complemented by similar data on the intensity of the photoemission
superconducting condensate spectral area. The gap anisotropy between the
$\Gamma-\bar{M}$ and $\Gamma-X$... | 1994-04-18 | 2016-08-14 | [
"cond-mat"
] | Jian Ma, C.Quitmann, R.J.Kelley, H.Berger, G. Margaritondo, and
M.Onellion (Dept. of Phys., Univ. of Wisconsin-Madison. Institut de Physique
Appliqu\'ee, EPFL, Switzerland.) |
cond-mat/9404054 | Intensity correlations in electronic wave propagation in a disordered
medium: the influence of spin-orbit scattering | We obtain explicit expressions for the correlation functions of transmission
and reflection coefficients of coherent electronic waves propagating through a
disordered quasi-one-dimensional medium with purely elastic diffusive
scattering in the presence of spin-orbit interactions. We find in the metallic
regime both lar... | 1994-04-18 | 2009-10-22 | [
"cond-mat"
] | A. M. S. Macedo |
cond-mat/9404051 | Dispersion of Ripplons in Superfluid 4he | A detailed study of the dispersion law of surface excitations in liquid \hef
at zero temperature is presented, with special emphasis to the short wave
length region. The hybridization mechanism between surface and bulk modes is
discussed on a general basis, investigating the scattering of slow rotons from
the surface. ... | 1994-04-18 | 2009-10-22 | [
"cond-mat"
] | A. Lastri, F. Dalfovo, L. Pitaevskii, and S. Stringari |
cond-mat/9404048 | Optical Absorption in Higher Fullerenes: Effects of Symmetry Reduction | Optical absorption spectra of higher fullerenes (C70 and C76) as well as of
C60 are calculated by a tight binding model with a long range Coulomb
interaction. A reasonable parameter set gives calculated spectra which are in
overall agreement with the experiments of of C60 and C76 in solutions. The
variations of the spe... | 1994-04-16 | 2007-05-23 | [
"cond-mat",
"chem-ph"
] | Kikuo Harigaya (Fundamental Physics Section, Electrotechnical
Laboratory, Umezono 1-1-4, Tsukuba 305, Japan) |
cond-mat/9404045 | Spin-charge separation at small lengthscales in the 2D t-J model | We consider projected wavefunctions for the 2D $t-J$ model. For various
wavefunctions, including correlated Fermi-liquid and Luttinger-type
wavefunctions we present the static charge-charge and spin-spin structure
factors. Comparison with recent results from a high-temperature expansion by
Putikka {\it et al.} indicate... | 1994-04-15 | 2009-10-22 | [
"cond-mat"
] | Claudius Gros, Roser Valenti |
cond-mat/9404047 | Comment on Tuning of the CDW in MX Chains | In M. Alouani et al., Phys. Rev. Lett. 71, 1415 (1993), the authors performed
local-density-approximation (LDA) calculations and fit to the two-band model
[J.T. Gammel et al., Phys. Rev. B 45, 6408 (1992)] we proposed for
halogen-bridged transition-metal linear-chain compounds ($M$$X$ chains). Based
on that fit, the au... | 1994-04-15 | 2007-05-23 | [
"cond-mat"
] | J. Tinka Gammel |
cond-mat/9404046 | Phase Ordering Kinetics of One-Dimensional Non-Conserved Scalar Systems | We consider the phase-ordering kinetics of one-dimensional scalar systems.
For attractive long-range ($r^{-(1+\sigma)}$) interactions with $\sigma>0$,
``Energy-Scaling'' arguments predict a growth-law of the average domain size $L
\sim t^{1/(1+\sigma)}$ for all $\sigma >0$. Numerical results for $\sigma=0.5$,
$1.0$, an... | 1994-04-15 | 2009-10-22 | [
"cond-mat"
] | A.D. Rutenberg and A.J. Bray |
cond-mat/9404044 | Dynamics by White-Noise Hamiltonians | A new class of random quantum--dynamical systems in continuous space is
introduced and studied in some detail. Each member of the class is
characterized by a Hamiltonian which is the sum of two parts. While one part is
deterministic, time--independent, and quadratic, the Weyl--Wigner symbol of the
other part is a homog... | 1994-04-15 | 2009-10-22 | [
"cond-mat"
] | Werner Fischer, Hajo Leschke, and Peter Mu"ller |
cond-mat/9404038 | Universal Parametric correlations at the soft edge of the spectrum of
random matrix ensembles | We extend a recent theory of parametric correlations in the spectrum of
random matrices to study the response to an external perturbation of
eigenvalues near the soft edge of the support. We demonstrate by explicit
non-perturbative calculation that the two-point function for level density
fluctuations becomes, after ap... | 1994-04-14 | 2009-10-22 | [
"cond-mat"
] | A. M. S. Macedo |
cond-mat/9404041 | Excess Charge in Polyampholytes | Polyampholytes (PAs) are polymers composed of (quenched) random sequences of
positive and negatively charged monomeric groups. We show that the radius of
gyration, $R_g$, of a PA strongly depends on its overall excess charge $Q$, and
is very weakly influenced by other aspects of the sequence. For $Q<Q_c\approx
q_0 \sqr... | 1994-04-14 | 2009-10-22 | [
"cond-mat"
] | Yacov Kantor and Mehran Kardar |
cond-mat/9404043 | Polarons as Nucleation Droplets in Non-Degenerate Polymers | We present a study of the nucleation mechanism that allows the decay of the
metastable phase (trans-cisoid) to the stable phase
(cis-transoid) in quasi one-dimensional non-degenerate polymers within the
continuum electron-phonon model. The electron-phonon configurations that lead
to the decay, i.e. the critical dropl... | 1994-04-14 | 2009-10-22 | [
"cond-mat"
] | D. Boyanovsky, C.A.A. de Carvalho and E. S. Fraga |
cond-mat/9404040 | Sub-Poissonian Shot Noise In A Diffusive Conductor | A review is given of the shot-noise properties of metallic, diffusive
conductors. The shot noise is one third of the Poisson noise, due to the
bimodal distribution of transmission eigenvalues. The same result can be
obtained from a semiclassical calculation. Starting from Oseledec's theorem it
is shown that the bimodal... | 1994-04-14 | 2016-08-31 | [
"cond-mat"
] | M. J. M. de Jong and C. W. J. Beenakker |
cond-mat/9404042 | Supersolids in the Bose-Hubbard Hamiltonian | We use a combination of numeric and analytic techniques to determine the
groun d state phase diagram of the Bose--Hubbard Hamiltonian with longer range
repulsi ve interactions. At half filling one finds superfluidity and an
insulating solid phase. Depending on the relative sizes of near--neighbor and
next near--neighbo... | 1994-04-14 | 2009-10-22 | [
"cond-mat"
] | G.G. Batrouni, R.T. Scalettar, G.T. Zimanyi, A.P. Kampf |
cond-mat/9404039 | Parametric S-matrix fluctuations in quantum theory of chaotic scattering | We study the effects of an arbitrary external perturbation in the statistical
properties of the S-matrix of quantum chaotic scattering systems in the limit
of isolated resonances. We derive, using supersymmetry, an exact
non-perturbative expression for the parameter dependent autocorrelator of two
S-matrix elements. Un... | 1994-04-14 | 2009-10-22 | [
"cond-mat"
] | A. M. S. Macedo |
cond-mat/9404034 | Four State Models and Clifford Algebras | With appropriate boundary conditions the anisotropic $XY$ chain in a magnetic
field is known to be invariant under quantum group transformations. We
generalize this model defining a class of integrable chains with several
fermionic degrees of freedom per site. In order to maintain the quantum group
symmetry a general c... | 1994-04-13 | 2009-10-22 | [
"cond-mat",
"hep-th",
"nlin.SI",
"solv-int"
] | Haye Hinrichsen |
cond-mat/9404037 | Spectra of Hamiltonians with Generalized Single-Site Dynamical Disorder | Starting from the deformed commutation relations \ba a_q(t) \,a_q^{\dag}(s) \
- \ q\,a_q^{\dag}(s)\,a_q(t)
\ = \ \Gam(t-s) {\bf 1} , \quad -1\ \le \ q\ \le\ 1\nn \ea with a covariance
$\Gam(t-s)$ and a parameter $q$ varying between $-1$ and $1$, a stochastic
process is constructed which continuously deforms the class... | 1994-04-13 | 2009-10-22 | [
"cond-mat"
] | Peter Neu and Roland Speicher |
cond-mat/9404032 | Excitation Spectrum of $S=1$ Antiferromagnetic Chains | The dynamical structure factor $S(Q,\omega)$ of the $S=1$ antiferromagnetic
Heisenberg chain with length 20 at zero temperature is calculated. The lowest
energy states have the delta-function peak at the region $\pi\ge \vert Q\vert
>0.3\pi$. At $\vert Q\vert<0.3\pi$ the lowest energy states are the lower-edge
of the co... | 1994-04-13 | 2009-10-22 | [
"cond-mat"
] | Minoru Takahashi |
cond-mat/9404033 | Optical Diffraction from Fractals with a Structural Transition | A macroscopic characterization of fractals showing up a structural transition
from dense to multibranched growth is made using optical diffraction theory.
Such fractals are generated via the numerical solution of the 2D Poisson and
Biharmonic equations and are compared to more 'regular'irreversible clusters
such as dif... | 1994-04-13 | 2009-10-22 | [
"cond-mat"
] | F. Perez-Rodriguez (Instituto de Fisica, Universidad Autonoma de
Puebla, Mexico), Wei Wang (Physics Department, Nanjing University, People's
Republic of China) and E. Canessa (ICTP-International Centre for Theoretical
Physics, Trieste, Italy) |
cond-mat/9404035 | Accurate Measurements of the Chemical Potential of Polymeric Systems by
Monte-Carlo Simulation | We present a new Monte-Carlo method for estimating the chemical potential of
model polymer systems. The method is based upon the gradual insertion of a
penetrable `ghost' polymer into the system and is effective for large chain
lengths and at high densities. Insertion of the ghost chain is facilitated by
use of an expa... | 1994-04-13 | 2009-10-22 | [
"cond-mat"
] | Nigel B. Wilding and Marcus Mueller |
cond-mat/9404036 | Replica Symmetry Breaking in Attractor Neural Network Models | The phenomenon of replica symmetry breaking is investigated for the retrieval
phases of Hopfield-type network models. The basic calculation is done for the
generalized version of the standard model introduced by Horner [1] and by
Perez-Vicente and Amit [2] which can exhibit low mean levels of neural
activity. For a mea... | 1994-04-13 | 2009-10-22 | [
"cond-mat"
] | H. Steffan and R. K\"uhn |
cond-mat/9404030 | Some Numerical Results on the Block Spin Transformation for the 2D Ising
Model at the Critical Point | We study the block spin transformation for the 2D Ising model at the critical
temperature $T_c$. We consider the model with the constraint that the total
spin in each block is zero. An old argument by Cassandro and Gallavotti allows
to show that the Gibbs potential for the transformed measure is well defined,
provided ... | 1994-04-12 | 2009-10-22 | [
"cond-mat",
"hep-lat",
"hep-th"
] | G. Benfatto, E. Marinari and E. Olivieri |
cond-mat/9404026 | Crossover Driven by Time-reversal Symmetry Breaking in Quantum Chaos | Parametric correlations of energy spectra of quantum chaotic systems are
presented in the orthogonal-unitary and symplectic-unitary crossover region.
The spectra are allowed to disperse as a function of two external
perturbations: one of which preserves time-reversal symmetry, while the other
violates it. Exact analyti... | 1994-04-12 | 2009-10-22 | [
"cond-mat"
] | N. Taniguchi, A. Hashimoto, B. D. Simons and B. L. Altshuler |
cond-mat/9404027 | Time-dependent transport in interacting and non-interacting mesoscopic
systems | We consider a mesoscopic region coupled to two leads under the influence of
external time-dependent voltages. The time dependence is coupled to source and
drain contacts, the gates controlling the tunnel- barrier heights, or to the
gates which define the mesoscopic region. We derive, with the Keldysh
nonequilibrium Gre... | 1994-04-12 | 2009-10-22 | [
"cond-mat"
] | Antti-Pekka Jauho, Ned S.Wingreen, and Yigal Meir |
cond-mat/9404025 | A Note on Statistical Interactions and the Thermodynamic Bethe Ansatz | We show that the thermodynamic Bethe ansatz equations for one-dimensional
integrable many-body systems can be reinterpreted in such a way that they only
code the statistical interactions, in the sense of Haldane, between particles
of identical or different momenta. Thus, the thermodynamic properties of these
systems ca... | 1994-04-12 | 2008-02-03 | [
"cond-mat",
"hep-th"
] | Denis Bernard and Yong-Shi Wu |
cond-mat/9404029 | Bend conductance of crossed wires in the presence of Andreev scattering | We study the 4-probe bend conductance $G_{14,32}$ of a mesoscopic crossed
wire structure in the ballistic regime in the absence of a magnetic field,
which for normal devices is usually negative. We predict that for sufficiently
large devices and for small applied voltages $G_{14,32}$ becomes positive in
the presence of... | 1994-04-12 | 2007-05-23 | [
"cond-mat"
] | Simon Robinson |
cond-mat/9404028 | Numerical Diagonalisation Study of the Trimer Deposition-Evaporation
Model in One Dimension | We study the model of deposition-evaporation of trimers on a line recently
introduced by Barma, Grynberg and Stinchcombe. The stochastic matrix of the
model can be written in the form of the Hamiltonian of a quantum spin-1/2 chain
with three-spin couplings given by $ H= \sum\displaylimits_i [(1 -
\sigma_i^-\sigma_{i+1}... | 1994-04-12 | 2009-10-22 | [
"cond-mat"
] | Peter B. Thomas, M. K. Hari Menon and Deepak Dhar |
cond-mat/9404031 | Disorder-Induced Depinning Transition | The competition in the pinning of a directed polymer by a columnar pin and a
background of random point impurities is investigated systematically using the
renormalization group method. With the aid of the mapping to the noisy-Burgers'
equation and the use of the mode-coupling method, the directed polymer is shown
to b... | 1994-04-12 | 2009-10-22 | [
"cond-mat"
] | Terence Hwa and Thomas Nattermann |
cond-mat/9404024 | Resonant Transport in Coupled Quantum Wells: a Probe for Scattering
Mechanisms | We present a microscopical theory and experimental results concerning
resistance resonance in two tunneling coupled quantum wells with different
mobilities. The shape of the resonance appears to be sensitive to the small
angle scattering rate on remote impurities and to the electron--electron
scattering rate. This allo... | 1994-04-11 | 2009-10-22 | [
"cond-mat"
] | Y. Berk, A. Kamenev, A. Palevski, L. N. Pfeiffer, and K. W. West |
cond-mat/9404023 | Failure of Fermi Liquid Theory in 2-D: A Signal from Perturbation Theory | We study the perturbative correction to the ground state energy eigenvalue of
a 2-dimensional dilute fermi gas with weak short-range two body repulsion. From
the structure of the energy shift we infer the presence of an induced two body
long range repulsive interaction $ {\displaystyle {1\over{r^2}} }$ among the
consti... | 1994-04-11 | 2007-05-23 | [
"cond-mat"
] | G. Baskaran |
cond-mat/9404021 | Phase-Locking in Strongly Coupled Squid Cells | Within the RSJ model we performed an analytical and numerical investigation
of SQUID cells consisting of two Josephson junctions shunted by an extremely
small inductance leading to strong coupling of the elements. Contrary to the
well-known behavior of cells shunted by a high inductance voltage phases of the
junctions ... | 1994-04-11 | 2009-10-22 | [
"cond-mat"
] | M. Basler, W. Krech and K. Yu. Platov |
cond-mat/9404022 | Nonlinear Viscous Vortex Motion in Two-Dimensional Josephson-Junction
Arrays | When a vortex in a two-dimensional Josephson junction array is driven by a
constant external current it may move as a particle in a viscous medium. Here
we study the nature of this viscous motion. We model the junctions in a square
array as resistively and capacitively shunted Josephson junctions and carry out
numerica... | 1994-04-11 | 2016-08-14 | [
"cond-mat"
] | T. J. Hagenaars, P. H. E. Tiesinga, J. E. van Himbergen and Jorge V.
Jos\'e |
cond-mat/9404020 | Static chaos and scaling behaviour in the spin-glass phase | We discuss the problem of static chaos in spin glasses. In the case of
magnetic field perturbations, we propose a scaling theory for the spin-glass
phase. Using the mean-field approach we argue that some pure states are
suppressed by the magnetic field and their free energy cost is determined by
the finite-temperature ... | 1994-04-09 | 2009-10-22 | [
"cond-mat"
] | Felix Ritort |
cond-mat/9404019 | The Electron-Phonon Interaction in the Presence of Strong Correlations | We investigate the effect of strong electron-electron repulsion on the
electron-phonon interaction from a Fermi-liquid point of view: the strong
interaction is responsible for vertex corrections, which are strongly dependent
on the $v_Fq/\omega$ ratio. These corrections generically lead to a strong
suppression of the e... | 1994-04-09 | 2009-10-22 | [
"cond-mat"
] | M. Grilli and C. Castellani (Dipartimento di Fisica, Universit\'a La
Sapienza, Piazzale Aldo Moro, Roma, Italy) |
cond-mat/9404018 | Spin Susceptibility and Gap Structure of the Fractional-Statistics Gas | This paper establishes and tests procedures which can determine the electron
energy gap of the high-temperature superconductors using the $t\!-\!J$ model
with spinon and holon quasiparticles obeying fractional statistics. A simpler
problem with similar physics, the spin susceptibility spectrum of the spin 1/2
fractiona... | 1994-04-09 | 2009-10-22 | [
"cond-mat"
] | J. L. Levy and R. B. Laughlin |
cond-mat/9404017 | Excitation Spectrum of the Spin-1/2 Ferromagnetic-Antiferromagnetic
Alternating Heisenberg Chain: | The natural explanation of the excitation spectrum of the spin-1
antiferromagnetic Heisenberg chain is given from the viewpoint of the spin-1/2
ferromagnetic-antiferromagnetic alternating Heisenberg chain. The energy
spectrum of the latter is calculated with fixed momentum $k$ by numerical
diagonalization of finite siz... | 1994-04-08 | 2009-10-22 | [
"cond-mat"
] | Kazuo Hida |
cond-mat/9404014 | Tunneling Between a Pair of Parallel Hall Droplets | In this paper, we examine interwell tunneling between a pair of fractional
quantum Hall liquids in a double quantum well system in a tilted magnetic
field. Using a variational Monte Carlo method, we calculate moments of the
intra-Landau level tunneling spectrum as a function of in-plane field component
$B_{\parallel}$ ... | 1994-04-07 | 2009-10-22 | [
"cond-mat"
] | S. R. Renn and B. W. Roberts |
cond-mat/9404016 | Damage Spreading During Domain Growth | We study damage spreading in models of two-dimensional systems undergoing
first order phase transitions. We consider several models from the same
non-conserved order parameter universality class, and find unexpected
differences between them. An exact solution of the Ohta-Jasnow-Kawasaki model
yields the damage growth l... | 1994-04-07 | 2009-10-22 | [
"cond-mat",
"hep-lat"
] | I.S. Graham, E. Hernandez-Garcia, and M. Grant |
cond-mat/9404012 | Dynamics of a Grafted Chain into a Rubber Network: A Monte Carlo Study
(minor grammatical changes) | The dynamics of a single chain tethered to an interface and in contact with a
cross-linked network is examined numerically. When the network is put in
contact with the tethered chain, the chain moves with dynamics that are highly
constrained due to entanglements. When the surface is repulsive, the chain runs
straight a... | 1994-04-07 | 2008-02-03 | [
"cond-mat"
] | J.M. Deutsch and Hyoungsoo Yoon |
cond-mat/9404013 | Exact result on the Mott transition in a two-dimensional model of
strongly correlated electrons | We study the properties of a quarter-filled system of electrons on a square
lattice interacting through a local repulsion $U$ and a nearest-neighbour
repulsion $V$ in the limit $V=+\infty$. We identify the ground-state for $U$
large enough and show that domain walls appear below a critical value
$U_c=4t/\pi$. We argue ... | 1994-04-07 | 2009-10-22 | [
"cond-mat"
] | Frederic Mila |
cond-mat/9404015 | Mutifractal Analysis of Broadly Distributed Observables at Criticality | The multifractal analysis of disorder induced localization-delocalization
transitions is reviewed. Scaling properties of this transition are generic for
multi parameter coherent systems which show broadly distributed observables at
criticality. The multifractal analysis of local measures is extended to more
general obs... | 1994-04-07 | 2015-06-25 | [
"cond-mat"
] | Martin Janssen |
cond-mat/9404009 | New perturbation theory of low-dimensional quantum liquids II: operator
description of Virasoro algebras in integrable systems | We show that the recently developed {\it pseudoparticle operator algebra}
which generates the low-energy Hamiltonian eigenstates of multicomponent
integrable systems also provides a natural operator representation for the the
Virasoro algebras associated with the conformal-invariant character of the
low-energy spectrum... | 1994-04-06 | 2009-10-22 | [
"cond-mat"
] | J.M.P. Carmelo, A.H. Castro Neto, and D.K. Campbell |
cond-mat/9404010 | Network Models of Quantum Percolation and Their Field-Theory
Representations | We obtain the field-theory representations of several network models that are
relevant to 2D transport in high magnetic fields. Among them, the simplest one,
which is relevant to the plateau transition in the quantum Hall effect, is
equivalent to a particular representation of an antiferromagnetic SU(2N) ($N\to
0$) spi... | 1994-04-06 | 2009-10-22 | [
"cond-mat"
] | Dung-Hai Lee |
cond-mat/9404011 | Network Models of Quantum Percolation and Their Field-Theory
Representations | We obtain the field-theory representations of several network models that are
relevant to 2D transport in high magnetic fields. Among them, the simplest one,
which is relevant to the plateau transition in the quantum Hall effect, is
equivalent to a particular representation of an antiferromagnetic SU(2N)
($N\rightarrow... | 1994-04-06 | 2007-05-23 | [
"cond-mat"
] | Dung-Hai Lee (U.C. Berkeley) |
cond-mat/9404007 | Zero--Temperature Quantum Phase Transition of a Two--Dimensional Ising
Spin--Glass | We study the quantum transition at $T=0$ in the spin-$\frac12$ Ising
spin--glass in a transverse field in two dimensions. The world line path
integral representation of this model corresponds to an effective classical
system in (2+1) dimensions, which we study by Monte Carlo simulations. Values
of the critical exponent... | 1994-04-06 | 2009-10-22 | [
"cond-mat",
"hep-lat"
] | Heiko Rieger and A. Peter Young |
cond-mat/9404008 | New perturbation theory of low-dimensional quantum liquids I: the
pseudoparticle operator basis | We introduce a new operator algebra for the description of the low-energy
physics of one-dimensional, integrable, multicomponent quantum liquids.
Considering the particular case of the Hubbard chain in a constant external
magnetic field and with varying chemical potential, we show that at low energy
its Bethe-ansatz so... | 1994-04-06 | 2009-10-22 | [
"cond-mat"
] | J.M.P. Carmelo, A.H. Castro Neto, and D.K. Campbell |
cond-mat/9404005 | Manifestation of Quantum Chaos in Electronic Band Structures | We use semiconductors as an example to show that quantum chaos manifests
itself in the energy spectrum of crystals. We analyze the {\it ab initio} band
structure of silicon and the tight-binding spectrum of the alloy
$Al_xGa_{1-x}As$, and show that some of their statistical properties obey the
universal predictions of ... | 1994-04-05 | 2009-10-22 | [
"cond-mat"
] | E. R. Mucciolo, R. B. Capaz, B. L. Altshuler, and J. D. Joannopoulos |
cond-mat/9404006 | Effects of atomic clustering on the optical properties of III-V alloys | Self-consistent electronic structure calculations together with a structural
model are used to study the effect of short-range atomic order on the optical
properties of otherwise random Al(0.5)Ga(0.5)As, Ga(0.5)In(0.5)P, and
Al(0.5)In(0.5)As alloys. We find that clustering can reduce the direct band gap
of these alloys... | 1994-04-05 | 2015-06-25 | [
"cond-mat"
] | Kurt A. Mader and Alex Zunger |
cond-mat/9404004 | Crossover from Isotropic to Directed Percolation | Percolation clusters are probably the simplest example for scale--invariant
structures which either are governed by isotropic scaling--laws
(``self--similarity'') or --- as in the case of directed percolation --- may
display anisotropic scaling behavior (``self--affinity''). Taking advantage of
the fact that both isotr... | 1994-04-04 | 2009-10-22 | [
"cond-mat"
] | E. Frey, U.C. T\"auber, and F. Schwabl |
cond-mat/9404003 | Ferromagnetism in the Infinite-U Hubbard Model | We have studied the stability of the ferromagnetic state in the infinite-U
Hubbard model on a square lattice by approximate diagonalization of finite
lattices using the density matrix renormalization group technique. By studying
lattices with up to 5X20 sites, we have found the ferromagnetic state to be
stable below th... | 1994-04-04 | 2009-10-22 | [
"cond-mat"
] | Shoudan Liang and Hanbin Pang |
cond-mat/9404002 | Scaling in high-temperature superconductors | A Hartree approximation is used to study the interplay of two kinds of
scaling which arise in high-temperature superconductors, namely critical-point
scaling and that due to the confinement of electron pairs to their lowest
Landau level in the presence of an applied magnetic field. In the neighbourhood
of the zero-fiel... | 1994-04-01 | 2009-10-22 | [
"cond-mat"
] | Ian D Lawrie |
cond-mat/9404001 | Folding Kinetics of Protein Like Heteropolymers | Using a simple three-dimensional lattice copolymer model and Monte Carlo
dynamics, we study the collapse and folding of protein-like heteropolymers. The
polymers are 27 monomers long and consist of two monomer types. Although these
chains are too long for exhaustive enumeration of all conformations, it is
possible to e... | 1994-04-01 | 2009-10-22 | [
"cond-mat",
"q-bio.BM"
] | Nicholas D. Socci and Jose' Nelson Onuchic |
cond-mat/9403094 | Off-Diagonal Long Range Order and Scaling in a Disordered Quantum Hall
System | We have numerically studied the bosonic off-diagonal long range order,
introduced by Read to describe the ordering in ideal quantum Hall states, for
noninteracting electrons in random potentials confined to the lowest Landau
level. We find that it also describes the ordering in disordered quantum Hall
states: the propo... | 1994-03-31 | 2009-10-22 | [
"cond-mat"
] | S. L. Sondhi and M. P. Gelfand |
cond-mat/9403095 | Exact Theory of Polymer Adsorption in Analogy with the Kondo Problem | We conjecture the exact scaling theory for the adsorption of two-dimensional
polymers by using boundary S matrices. We compute the boundary free energy (the
``g-function''), study the flow from adsorbed to desorbed phase, and derive the
crossover exponent and all the geometrical exponents at the transition. More
genera... | 1994-03-31 | 2009-10-22 | [
"cond-mat",
"hep-th"
] | P. Fendley and H. Saleur |
cond-mat/9403090 | A comparison of FQHE quasi electron trial wave functions on the sphere | We study Haldane's and Jain's proposals for the quasiparticle wave function
on the sphere. The expectation values of the energy and the pair angular
momenta distribution are calculated at filling factor 1/3 and compared with the
data of an exact numerical diagonalization for up to 10 electrons with Coulomb
and truncate... | 1994-03-30 | 2009-10-22 | [
"cond-mat"
] | Uwe Girlich, Meik Hellmund |
cond-mat/9403092 | Eigenspectrum and Localization for Diffusion with Traps | We investigate the {\em survival-return} probability distribution and the
eigenspectrum for the transition probability matrix, for diffusion in the
presence of perfectly absorbing traps distributed with critical disorder in two
and three dimensions. The density of states is found to have a Lifshitz tail in
the low freq... | 1994-03-30 | 2009-10-22 | [
"cond-mat"
] | Achille Giacometti and Hisao Nakanishi |
cond-mat/9403091 | Universality of Frequency and Field Scaling of the Conductivity Measured
by Ac-Susceptibility of a Ybco-Film | Utilizing a novel and exact inversion scheme, we determine the complex linear
conductivity $\sigma (\omega )$ from the linear magnetic ac-susceptibility
which has been measured from 3\,mHz to 50\,MHz in fields between 0.4\,T and
4\,T applied parallel to the c-axis of a 250\,nm thin disk. The frequency
derivative of the... | 1994-03-30 | 2009-10-22 | [
"cond-mat"
] | J. K\"otzler(1), G. Nakielski(1), M. Baumann(1), R. Behr(1), F.
Goerke(1), E.H. Brandt(2) ((1)Institut f\"ur Angewandte Physik, Jungiusstr.
11, D 20355 Hamburg; (2)Max-Planck-Institut f\"ur Metallforschung,
Heisenbergstr. 1, D 70569 Stuttgart) |
cond-mat/9403093 | Crossover from Self--Similar to Self--Affine Structures in Percolation | We study the crossover from self--similar scaling behavior to asymptotically
self--affine (anisotropic) structures. As an example, we consider bond
percolation with one preferred direction. Our theory is based on a
field--theoretical representation, and takes advantage of a renormalization
group approach designed for c... | 1994-03-30 | 2009-10-22 | [
"cond-mat"
] | Erwin Frey, Uwe Claus T\"auber, and Franz Schwabl |
cond-mat/9403087 | On the Josephson Coupling between a disk of one superconductor and a
surrounding superconducting film of a different symmetry | A cylindrical Josephson junction with a spatially dependent Josephson
coupling which averages to zero is studied in order to model the physics of a
disk of d-wave superconductor embedded in a superconducting film of a different
symmetry. It is found that the system always introduces Josepshon vortices in
order to gain ... | 1994-03-29 | 2009-10-22 | [
"cond-mat"
] | A. J. Millis (A.T.& T. Bell Laboratories, 600 Mountain Avenue, Murray
Hill, N. J.USA) |
cond-mat/9403088 | Recent Developments in Supersymmetric Quantum Mechanics | Some recent results in supersymmetric quantum mechanics are presented. New
semi-classical approximation formulas for Witten's realization of
supersymmetric quantum mechanics are discussed. Implications of the
supersymmetric structure of Pauli's Hamiltonian are also considered. In
particular, the paramagnetisation of a ... | 1994-03-29 | 2008-02-03 | [
"cond-mat",
"chem-ph",
"hep-th"
] | Georg Junker |
cond-mat/9403089 | Universality Classes for Interface Growth with Quenched Disorder | We present numerical evidence that there are two distinct universality
classes characterizing driven interface roughening in the presence of quenched
disorder. The evidence is based on the behavior of $\lambda$, the coefficient
of the nonlinear term in the growth equation. Specifically, for three of the
models studied,... | 1994-03-29 | 2009-10-22 | [
"cond-mat"
] | LAN Amaral, A-L Barabasi, and HE Stanley |
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