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Silvio Franz 1, Marc Mézard 2, Federico Ricci-Tersenghi 1, Martin Weigt 3, Riccardo Zecchina 1 Europhysics Letters (EPL) 55 (2001) 465 We introduce a finite-connectivity ferromagnetic model with a three-spin interaction which has a crystalline (ferromagnetic) phase as well as a glass phase. The model is not frustrated, it has a ferromagnetic equilibrium phase at low temperature which is not reached dynamically in a quench […]

Olivier Benichou 1, 2, Jean Desbois 2 Journal of Physics A 33 (2000) 6655-6665 We study long time dynamical properties of a chain of harmonically bound Brownian particles. This chain is allowed to wander everywhere in the plane. We show that the scaling variables for the occupation times T_j, areas A_j and winding angles \theta_j (j=1,…,n labels the particles) take

Texier, C., Comtet, A. in Quantum physics at mesoscopic scale ed. by C. Glattli, M. Sanquer, J. Trân Thanh Vân, EDP Sciences, (2000), p.475 proceedings of the XXXIVth Moriond conference 23-30 january 1999

N. Kirova 1, S. Brazovskii 1 Journal de Physique IV Colloque 10 (2000) 3-189 The rich order parameter of Spin Density Waves allows for unusual object of a complex topological nature: a half-integer dislocation combined with a semi-vortex of a staggered magnetization. It becomes energetically preferable to ordinary dislocation due to enhanced Coulomb interactions in the semiconducting regime. Generation

Desbois, J. European Physical Journal B 15 (2000) 201-203

Marklof, J. Ergodic Theory and Dynamical Systems 20 (2000) 1127-1172

Olivier Benichou 1, 2, Jean Desbois 2 Journal of Statistical Physics 101 (2000) 921-931 We study various dynamical properties (winding angles, areas) of a set of harmonically bound Brownian particles (monomers), one endpoint of this chain being kept fixed at the origin 0. In particular, we show that, for long times t, the areas {A_i} enclosed by the monomers scale

Vershik, A., Nechaev, S., Bibkov, R. Communications in Mathematical Physics 212 (2000) 469-501

F. Krzakala 1, O. C. Martin 1 Physical Review Letters 85 (2000) 3013-3016 Excitations of three-dimensional spin glasses are computed numerically. We find that one can flip a finite fraction of an LxLxL lattice with an O(1) energy cost, confirming the mean field picture of a non-trivial spin overlap distribution P(q). These low energy excitations are not domain-wall-like, rather

Eugene Bogomolny 1, Patricio Leboeuf 1, Charles Schmit 1 Physical Review Letters 85 (2000) 2486-2489 The statistical properties of a Hamiltonian $H_0$ perturbed by a localized scatterer are considered. We prove that when $H_0$ describes a bounded chaotic motion, the universal part of the spectral statistics are not changed by the perturbation. This is done first within the random matrix model.