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Condensed Matter papers — page 249

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Continuous Elastic Phase Transitions in Pure and Disordered Crystals
We review the theory of second--order (ferro--)elastic phase transitions, where the order parameter consists of a certain linear combination of strain tensor components, and the accompanying soft…
F. Schwabl, U. C. TäuberJul 4, 1996
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On Metal-Insulator Transitions due to Self-Doping
We investigate the influence of an unoccupied band on the transport properties of a strongly correlated electron system. For that purpose, additional orbitals are coupled to a Hubbard model via…
Stefan Blawid, Hoangh Anh Tuan, Takashi Yanagisawa et al.Jul 4, 1996
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Exponents appearing in heterogeneous reaction-diffusion models in one dimension
We study the following 1D two-species reaction diffusion model : there is a small concentration of B-particles with diffusion constant DB in an homogenous background of W-particles with diffusion…
Cécile MonthusJul 4, 1996
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Traveling-Wave Chemotaxis
A simple model is studied for the chemotactic movement of biological cells in the presence of a periodic chemical wave. It incorporates the feature of adaptation that may play an important role in…
Raymond E. GoldsteinJul 4, 1996
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On the Kinetics of Multi-dimensional Fragmentation
We present two classes of exact solutions to a geometric model which describes the kinetics of fragmentation of d-dimensional hypercuboid-shaped objects. The first class of exact solutions is…
P. Singh, M. K. HassanJul 4, 1996
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Equilibrium properties of the Ising frustrated lattice gas
We study the equilibrium properties of an Ising frustrated lattice gas with a mean field replica approach. This model bridges usual Spin Glasses and a version of Frustrated Percolation…
Jeferson J. Arenzon, Mario Nicodemi, Mauro SellittoJul 4, 1996
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Monte Carlo simulation of a two-dimensional continuum Coulomb gas
We study the classical two-dimensional Coulomb gas model for thermal vortex fluctuations in thin superconducting/superfluid films by Monte Carlo simulation of a grand canonical vortex ensemble…
Jack Lidmar, Mats WallinJul 4, 1996
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Fractal formation and ordering in Random Sequential Adsorption
We study the kinetics of random sequential adsorption of a mixture of particles with continuous distribution of sizes for different deposition rules. It appears in the long time limit the resulting…
M. K. HassanJul 3, 1996
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How to derive a protein folding potential? A new approach to the old problem
In this paper we introduce a novel method of deriving a pairwise potential for protein folding. The potential is obtained by optimization procedure, which simultaneously maximizes the energy gap for…
L. A. Mirny, E. I. ShakhnovichJul 3, 1996
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Velocity Selection for Propagating Fronts in Superconductors
Using the time-dependent Ginzburg-Landau equations we study the propagation of planar fronts in superconductors, which would appear after a quench to zero applied magnetic field. Our numerical…
S. John Di Bartolo, Alan T. DorseyJul 3, 1996
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Improved Power Counting and Fermi Surface Renormalization
The naive perturbation expansion for many-fermion systems is infrared divergent. One can remove these divergences by introducing counterterms. To do this without changing the model, one has to solve…
Manfred SalmhoferJul 3, 1996
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Laplacian growth as one-dimensional turbulence
A new model of Laplacian stochastic growth is formulated using conformal mappings. The model describes two growth regimes, stable and turbulent, separated by a sharp phase transition. The first few…
M. B. Hastings, L. S. LevitovJul 3, 1996
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Medium-range interactions and crossover to classical critical behavior
We study the crossover from Ising-like to classical critical behavior as a function of the range R of interactions. The power-law dependence on R of several critical amplitudes is calculated from…
Erik Luijten, Henk W. J. Blöte, Kurt BinderJul 3, 1996
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Quantum Ergodicity and Localization in Conservative Systems: the Wigner Band Random Matrix Model
First theoretical and numerical results on the global structure of the energy shell, the Green function spectra and the eigenfunctions, both localized and ergodic, in a generic conservative quantum…
G. Casati, B. V. Chirikov, I. Guarneri et al.Jul 3, 1996
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Point interactions in a strip
We study the behavior of a quantum particle confined to a hard--wall strip of a constant width in which there is a finite number N of point perturbations. Constructing the resolvent of the…
P. Exner, R. Gawlista, P. Šeba et al.Jul 3, 1996
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Point interaction in dimension two and three as models of small scatterers
In addition to the conventional renormalized--coupling--constant picture, point interactions in dimension two and three are shown to model within a suitable energy range scattering on localized…
P. Exner, P. ŠebaJul 3, 1996
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Manifestation of the Hofstadter butterfly in far-infrared absorption
The far-infrared absorption of a two-dimensional electron gas with a square-lattice modulation in a perpendicular constant magnetic field is calculated self-consistently within the Hartree…
Vidar Gudmundsson, Rolf R. GerhardtsJul 3, 1996
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Quantum Hall quarks or Short distance physics of quantized Hall fluids
In order to obtain a local description of the short distance physics of fractionally quantized Hall states for realistic (e.g. Coulomb) interactions, I propose to view the zeros of the ground state…
Martin GreiterJul 3, 1996
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Novel Correlations in Arbitrary Dimensions
We present a new three dimensional many-body Hamiltonian with three-body and five-body interactions. We obtain the exact ground state as well as some excited states of this Hamiltonian for arbitrary…
Pijush K. GhoshJul 2, 1996
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Generalized Dynamic Scaling for Critical Relaxations
The dynamic relaxation process for the two dimensional Potts model at criticality starting from an initial state with very high temperature and arbitrary magnetization is investigated with Monte…
B. ZhengJul 2, 1996
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Gap States in Dilute Magnetic Alloy Superconductors
We study states in the superconducting gap induced by magnetic impurities using self-consistent quantum Monte Carlo with maximum entropy and formally exact analytic continuation methods. The magnetic…
Woonki Chung, Mark JarrellJul 2, 1996
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Phase separation in the one-dimensional Hubbard model
The Hartree-Fock ground-state phase diagram of the one-dimensional Hubbard model is calculated in the μ-U plane, restricted to phases with no charge density modulation, extending the results…
J. H. SamsonJul 2, 1996
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Cooling rate effects in amorphous Silica: A Computer Simulation Study
Using molecular dynamics computer simulations we investigate how in silica the glass transition and the properties of the resulting glass depend on the cooling rate with which the sample is cooled.…
Katharina Vollmayr, Walter Kob, Kurt BinderJul 2, 1996
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Thermoelectric Response of an Interacting Two-Dimensional Electron Gas in Quantizing Magnetic Field
We present a discussion of the linear thermoelectric response of an interacting electron gas in a quantizing magnetic field. Boundary currents can carry a significant fraction of the net current…
N. R. Cooper, B. I. Halperin, I. M. RuzinJul 1, 1996
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Theoretical study of hydrogen-covered diamond (100) surfaces: A chemical potential analysis
The bare and hydrogen-covered diamond (100) surfaces were investigated through pseudopotential density-functional calculations within the local-density approximation. Different coverages, ranging…
Suklyun Hong, M. Y. ChouJul 1, 1996
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