2005

J. N. Fuchs 1, D. M. Gangardt 2, T. Keilmann 3, G. V. Shlyapnikov 2, 4 Physical Review Letters 95 (2005) 150402 We study a one-dimensional (iso)spin 1/2 Bose gas with repulsive delta-function interaction by the Bethe Ansatz method and discuss the excitations above the polarized ground state. In addition to phonons the system features spin waves with a quadratic dispersion. We compute analytically […]

Cirano De Dominicis 1, Irene Giardina 2, Enzo Marinari 3, Olivier C. Martin 4, Francesco Zuliani 4 Physical Review B 72 (2005) 014443 We investigate spin-spin correlation functions in the low temperature phase of spin-glasses. With the replica field theory formalism, we examine in detail their infrared (long distance) behavior. In particular we identify a longitudinal mode that remains massive in the infinite volume limit.

Jesper Lykke Jacobsen 1, Jesus Salas 2, Alan D. Sokal 3 Journal of Statistical Physics 119 (2005) 1153-1281 We study the q-state Potts model with nearest-neighbor coupling v=e^{\\beta J}-1 in the limit q,v \\to 0 with the ratio w = v/q held fixed. Combinatorially, this limit gives rise to the generating polynomial of spanning forests; physically, it provides information about the

Kirova, N., Brazovskii, S. Journal de Physique IV France 131 (2005) 147-150

Hong Jiang 1, Denis Ullmo 2, 3, Weitao Yang 1, Harold U. Baranger 2 Physical Review B 71 (2005) 085313 We evaluate the magnitude of two important mesoscopic effects using a realistic model of typical quantum dots. « Scrambling\’\’ and « gate effect\’\’ are defined as the change in the single-particle spectrum due to added electrons or gate-induced shape deformation, respectively. These two effects are investigated

D. S. Petrov 1, 2, 3, C. Salomon 4, G. V. Shlyapnikov 2, 3, 5, 6 Physical Review A: Atomic, Molecular and Optical Physics 71 (2005) 012708 We consider weakly bound diatomic molecules (dimers) formed in a two-component atomic Fermi gas with a large positive scattering length for the interspecies interaction. We develop a theoretical approach for calculating atom-dimer and dimer-dimer elastic scattering and for analyzing

Richard, J.-F., Jacobsen, J.L. Nuclear Physics B 731 (2005) 335-351

P. Leboeuf 1 Lecture Notes in Physics 652 (2005) 245 Shell effects in atomic nuclei are a quantum mechanical manifestation of the single–particle motion of the nucleons. They are directly related to the structure and fluctuations of the single–particle spectrum. Our understanding of these fluctuations and of their connections with the regular or chaotic nature of the

Brazovskii, S., Latyshev, Yu.I., Matveenko, S.I., Monceau, P. Journal de Physique IV France 131 (2005) 77-80

O. C. Martin 1, M. Mezard 1, O. Rivoire 1 Journal of Statistical Mechanics: Theory and Experiment 1 (2005) P09006 The multi-index matching problem (MIMP) generalizes the well known matching problem by going from pairs to d-uplets. We use the cavity method from statistical physics to analyze its properties when the costs of the d-uplets are random. At low temperatures we