Nom de l’auteur/autrice :admin

R. Voituriez 1, S. Nechaev 1, 2 Journal of Physics A 33 (2000) 5631-5652 Multifractal properties of the distribution of topological invariants for a model of trajectories randomly entangled with a nonsymmetric lattice of obstacles are investigated. Using the equivalence of the model to random walks on a locally nonsymmetric tree, statistical properties of topological invariants, such as drift and […]

Madsen, L.B., Schlagheck, P., Lambropoulos, P. Physical Review A 62 (2000) 062719

Jérôme Houdayer 1, Florent Krzakala 2, Olivier C. Martin 2 European Physical Journal B 18 (2000) 467-477 We numerically extract large-scale excitations above the ground state in the 3-dimensional Edwards-Anderson spin glass with Gaussian couplings. We find that associated energies are O(1), in agreement with the mean field picture. Of further interest are the position-space properties of these excitations. First, our study

Harold U. Baranger 1, 2, Denis Ullmo 3, Leonid I. Glazman 4 Physical Review B 61 (2000) R2425-2428 We investigate the spin of the ground state of a geometrically confined many-electron system. For atoms, shell structure simplifies this problem– the spin is prescribed by the well-known Hund’s rule. In contrast, quantum dots provide a controllable setting for studying the interplay of quantum interference and

F. Von Oppen 1, D. Ullmo 2, H. U. Baranger 3 Physical Review B 62 (2000) 1935-1942 We consider the contribution of electron-electron interactions to the orbital magnetization of a two-dimensional electron gas, focusing on the ballistic limit in the regime of negligible Landau-level spacing. This regime can be described by combining diagrammatic perturbation theory with semiclassical techniques. At sufficiently low

Christophe Texier 1 Journal of Physics A 33 (2000) 6095-6128 We study the distribution of the $n$-th energy level for two different one-dimensional random potentials. This distribution is shown to be related to the distribution of the distance between two consecutive nodes of the wave function. We first consider the case of a white noise potential and

O. Benichou 1, 2, J. Klafter, M. Moreau 2, G. Oshanin 2 Physical Review E: Statistical, Nonlinear, and Soft Matter Physics 62 (2000) 3327-3339 We study the dynamics of a carrier, which performs a biased motion under the influence of an external field E, in an environment which is modeled by dynamic percolation and created by hard-core particles. The particles move randomly on

Dembrowski, C., Graf, H.D., Heine, A., Rehfeld, H., Richter, A., Schmit, C. Physical Review E 62 (2000) R4516-R4519

Rouzière, S., Ravy, S., Pouget, P.P., Brazovskii, S. Physical Review B 62 (2000) R16231-16234

Philippe Di Francesco 1, Emmanuel Guitter 1, Jesper Lykke Jacobsen 2 Nuclear Physics B 580 (2000) 757-795 This note addresses the meander enumeration problem: \’Count all topologically inequivalent configurations of a closed planar non self-intersecting curve crossing a line through a given number of points\’. We review a description of meanders introduced recently in terms of the coupling to gravity of