publications

Oriol Bohigas 1, Patricio Leboeuf 1 Physical Review Letters 88 (2002) 092502 Shell corrections are important in the determination of nuclear ground-state masses and shapes. Although general arguments favor a regular single-particle dynamics, symmetry-breaking and the presence of chaotic layers cannot be excluded. The latter provide a natural framework that explains the observed differences between experimental and computed masses. […]

Julien Lamarcq 1, Jean-Philippe Bouchaud 1, Olivier C. Martin 2, Marc Mézard 2 Europhysics Letters (EPL) 58 (2002) 321 We study numerically the local low-energy excitations in the 3-d Edwards-Anderson model for spin glasses. Given the ground state, we determine the lowest-lying connected cluster of flipped spins with a fixed volume containing one given spin. These excitations are not compact, having a fractal dimension

Florent Krzakala 1, Marc Mézard 1, Markus Muller 1 Europhysics Letters (EPL) 57 (2002) 752-758 We characterize the low temperature phase of a simple model for RNA secondary structures by determining the typical energy scale E(l) of excitations involving l bases. At zero temperature, we find a scaling law E(l) \sim l^\theta with \theta \approx 0.23, and this same scaling holds

Jesper-Lykke Jacobsen 1, Paul Zinn-Justin 1 Physical Review E: Statistical, Nonlinear, and Soft Matter Physics 66 (2002) 055102 We consider the fractal dimensions d_k of the k-connected part of percolation clusters in two dimensions, generalizing the cluster (k=1) and backbone (k=2) dimensions. The codimensions X_k = 2-d_k describe the asymptotic decay of the probabilities P(r,R) ~ (r/R)^{X_k} that an

Paul Zinn-Justin 1, Jean-Bernard Zuber 2 Disc. Math. 246 (2002) 343 Using matrix model techniques for the counting of planar Feynman diagrams, recent results of Sundberg and Thistlethwaite on the counting of alternating tangles and links are reproduced. 1. Laboratoire de Physique Théorique et Hautes Energies (LPTHE), CNRS : UMR7589 – Université Paris VI – Pierre et Marie Curie – Université Paris VII

Giulio Biroli 1, Marc Mézard 2 Physical Review Letters 88 (2002) 025501 Motivated by the concept of geometrical frustration, we introduce a class of statistical mechanics lattice models for the glass transition. Monte Carlo simulations in three dimensions show that they display a dynamical glass transition which is very similar to that observed in other off-lattice systems and which

Macris, N., Ouvry, S. Proceedings of the Third Sakharov Conference, Lebedev Institute, Moscou, June (2002)

Brazovskii, S., Kirova, N. Paris-Sud, Spéciale Recherche (2002) 90

Helena R. Lourenco 1, Olivier C. Martin 2, Thomas Stützle 3 Science Kluwer 57 (2002) 321-353 This is a survey of ‘Iterated Local Search’, a general purpose metaheuristic for finding good solutions of combinatorial optimization problems. It is based on building a sequence of (locally optimal) solutions by: (1) perturbing the current solution; (2) applying local search to that modified solution. At a

Vladimir Korepin 1, Paul Zinn-Justin 1 Journal of Mathematical Physics 43 (2002) 3261-3267 In this note, we consider the six-vertex model with domain wall boundary conditions, defined on a $M\times M$ lattice, in the inhomogeneous case where the partition function depends on 2M inhomogeneities $\lambda_j$ and $\mu_k$. For a particular choice of the set of $\lambda_j$ we find a