2013

Coherent topological defect dynamics and collective modes in superconductors and electronic crystals

Dragan Mihailovic 1, 2, Tomaz Mertelj 1, Viktor V Kabanov 1, Serguei Brazovskii 3 Journal of Physics: Condensed Matter 25 (2013) 404206 The control of condensed matter systems out of equilibrium by laser pulses allows us to investigate the system trajectories through symmetry-breaking phase transitions. Thus the evolution of both collective modes and single particle excitations can be followed through diverse phase transitions with […]

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Calculation of mean spectral density for statistically uniform tree-like random models

E. Bogomolny 1, O. Giraud 1 Physical Review E 88 (2013) 062811 For random matrices with tree-like structure there exists a recursive relation for the local Green functions whose solution permits to find directly many important quantities in the limit of infinite matrix dimensions. The purpose of this note is to investigate and compare expressions for the spectral density

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Belief Propagation Reconstruction for Discrete Tomography

Emmanuelle Gouillart 1, Florent Krzakala 2, Marc Mezard 3, Lenka Zdeborová 4 Inverse Problems 29, 3 (2013) 035003 We consider the reconstruction of a two-dimensional discrete image from a set of tomographic measurements corresponding to the Radon projection. Assuming that the image has a structure where neighbouring pixels have a larger probability to take the same value, we follow a Bayesian approach and

Belief Propagation Reconstruction for Discrete Tomography Lire la suite »

Asymmetric Lévy flights in the presence of absorbing boundaries

Clélia de Mulatier 1, 2, Alberto Rosso 1, Gregory Schehr 1 Journal of Statistical Mechanics: Theory and Experiment (2013) P10006 We consider a one dimensional asymmetric random walk whose jumps are identical, independent and drawn from a distribution \phi(\eta) displaying asymmetric power law tails (i.e. \phi(\eta) \sim c/\eta^{\alpha +1} for large positive jumps and \phi(\eta) \sim c/(\gamma |\eta|^{\alpha +1}) for large negative

Asymmetric Lévy flights in the presence of absorbing boundaries Lire la suite »

Asymmetric Lévy flights in the presence of absorbing boundaries

Clélia de Mulatier 1, 2, Alberto Rosso 1, Gregory Schehr 1 Journal of Statistical Mechanics: Theory and Experiment (2013) P10006 We consider a one dimensional asymmetric random walk whose jumps are identical, independent and drawn from a distribution \phi(\eta) displaying asymmetric power law tails (i.e. \phi(\eta) \sim c/\eta^{\alpha +1} for large positive jumps and \phi(\eta) \sim c/(\gamma |\eta|^{\alpha +1}) for large negative

Asymmetric Lévy flights in the presence of absorbing boundaries Lire la suite »

Archive ouverte HAL – Mesoscopic fluctuations in the Fermi-liquid regime of the Kondo problem

Denis Ullmo 1, * Dong E. Liu 2 Sébastien Burdin 3 Harold U. Baranger 2 European Physical Journal B: Condensed Matter and Complex Systems, Springer-Verlag, 2013, 86 (8), pp.353. 〈10.1140/epjb/e2013-40418-3〉 We consider the low temperature regime of the mesoscopic Kondo problem, and in particular the relevance of a Fermi-liquid description of this regime. Mesoscopic fluctuations

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Anomalous fluctuations of currents in Sinai-type random chains with strongly correlated disorder

Gleb Oshanin 1, Alberto Rosso 2, Gregory Schehr 2 Physical Review Letters 110 (2013) 100602 We study properties of a random walk in a generalized Sinai model, in which a quenched random potential is a trajectory of a fractional Brownian motion with arbitrary Hurst parameter H, 0< H

Anomalous fluctuations of currents in Sinai-type random chains with strongly correlated disorder Lire la suite »

A stochastic model of long-range interacting particles

Shamik Gupta 1, Thierry Dauxois 2, Stefano Ruffo 2 Journal of Statistical Mechanics: Theory and Experiment (2013) P11003 We introduce a model of long-range interacting particles evolving under a stochastic Monte Carlo dynamics, in which possible increase or decrease in the values of the dynamical variables is accepted with preassigned probabilities. For symmetric increments, the system at long times settles to

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A note on weakly discontinuous dynamical transitions

Silvio Franz 1, Giorgio Parisi 2, Federico Ricci-Tersenghi 2, Tommaso Rizzo 2, Pierfrancesco Urbani 1 Journal of Chemical Physics 138 (2013) 064504 We analyze Mode Coupling discontinuous transition in the limit of vanishing discontinuity, approaching the so called « $A_3$ » point. In these conditions structural relaxation and fluctuations appear to have universal form independent from the details of the system. The analysis of this limiting case

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A method for calculating spectral statistics based on random-matrix universality with an application to the three-point correlations of the Riemann zeros

E. Bogomolny 1, J. P. Keating 2 Journal of Physics A General Physics 46 (2013) 305203 We illustrate a general method for calculating spectral statistics that combines the universal (Random Matrix Theory limit) and the non-universal (trace-formula-related) contributions by giving a heuristic derivation of the three-point correlation function for the zeros of the Riemann zeta function. The main idea

A method for calculating spectral statistics based on random-matrix universality with an application to the three-point correlations of the Riemann zeros Lire la suite »

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