2008

Thomas Jorg 1, Helmut G. Katzgraber 2 Physical Review B 77 (2008) 214426 We study the four-dimensional Ising spin glass with Gaussian and bond-diluted bimodal distributed interactions via large-scale Monte Carlo simulations and show via an extensive finite-size scaling analysis that four-dimensional Ising spin glasses obey universality. 1. Laboratoire de Physique Théorique et Modèles Statistiques (LPTMS), CNRS : UMR8626 – Université […]

Satya N. Majumdar 1, Robert M. Ziff 2 Physical Review Letters 101 (2008) 050601 It is shown that statistics of records for time series generated by random walks are independent of the details of the jump distribution, as long as the latter is continuous and symmetric. In N steps, the mean of the record distribution grows as the sqrt(4N/pi)

Jacobsen, J.L. Physical Review Letters100 (2008) 118102

M. Colomé-Tatché 1 Physical Review A: Atomic, Molecular and Optical Physics 78 (2008) 033612 We study the two-component repulsive Fermi gas with imbalanced populations in one dimension. Starting from the Bethe Ansatz solution we calculate analytically the phase diagram for the homogeneous system. We show that two phases appear: the fully polarised phase and the partially polarised

Vivo, P., Majumdar, S.N. Physica A387 (2008) 4839-4855

E. Bogomolny 1, R. Dubertrand 1, C. Schmit 1 Physical Review E: Statistical, Nonlinear, and Soft Matter Physics 78 (2008) 056202 The construction of the trace formula for open dielectric cavities is examined in detail. Using the Krein formula it is shown that the sum over cavity resonances can be written as a sum over classical periodic orbits for the motion

S. Bustingorry 1, A. B. Kolton 2, A. Rosso 3, W. Krauth 4, T. Giamarchi 5 Physica B: Condensed Matter 404 (2008) 444-446 Many seemingly different macroscopic systems (magnets, ferroelectrics, CDW, vortices,..) can be described as generic disordered elastic systems. Understanding their static and dynamics thus poses challenging problems both from the point of view of fundamental physics and of practical applications. Despite important progress

S. Brazovskii 1, 2, S. I. Matveenko 1, 2 Physical Review B 77 (2008) 155432 We suggest a theory of internal coherent tunneling in the pseudogap region, when the applied voltage U is below the free electron gap 2Delta_0. We address quasi 1D systems, where the gap is originated by spontaneous lattice distortions of the Incommensurate Charge Density Wave (ICDW) type.

Holger Frahm 1, Temo Vekua 2 Journal of statistical mechanics-theory and experiment (2008) P01007 We study the low energy behavior of the one dimensional Hubbard model across the Mott metal-insulator phase transition in an external magnetic field. In particular we calculate elements of the dressed charge matrix at the critical point of the Mott transition for arbitrary Hubbard repulsion

M. A. Baranov 1, 2, 3, C. Lobo 4, G. V. Shlyapnikov 5 Physical Review B 78 (2008) 033620 We consider a superfluid state in a two-component gas of fermionic atoms with equal densities and unequal masses in the BCS limit. We develop a perturbation theory along the lines proposed by Gorkov and Melik-Barkhudarov and find that for a large difference in the