2001

Mouchet, A., Ullmo, D. Physics World 14 (2001) 24

Patricio Leboeuf 1, Nicolas Pavloff 1 Physical Review A: Atomic, Molecular and Optical Physics 64 (2001) 033602 We compute the stationary profiles of a coherent beam of Bose condensed atoms propagating through a guide. Special emphasis is put on the effect of an obstacle present on the trajectory of the beam. The obstacle considered (such as a bend in

Schlagheck, P., Buchleitner, A. Physical Review A 63 (2001) 024701

Alexei A. Naidenov 1, Sergei K. Nechaev 1, 2 Journal of Physics A 34 (2001) 5625-5634 The adsorption of an ideal heteropolymer loop at a potential point well is investigated within the frameworks of a standard random matrix theory. On the basis of semi-analytical/semi-numerical approach the histogram of transition points for the ensemble of quenched heteropolymer structures with bimodal symmetric distribution of

Jesper-Lykke Jacobsen 1, Paul Zinn-Justin 1 Journal of Knot Theory and Its Ramifications 10 (2001) 1233-1267 We propose a transfer matrix algorithm for the enumeration of alternating link diagrams with external legs, giving a weight $n$ to each connected component. Considering more general tetravalent diagrams with self-intersections and tangencies allows us to treat topological (flype) equivalences. This is done

Jérôme Houdayer 1, Olivier C. Martin 2 Physical Review E: Statistical, Nonlinear, and Soft Matter Physics 64 (2001) 056704 We describe a numerical algorithm for computing spin glass ground states with a high level of reliability. The method uses a population based search and applies optimization on multiple scales. Benchmarks are given leading to estimates of the performance on large

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