2003

On Breaking Time Reversal in a Simple, Smooth, Chaotic System

Steven Tomsovic 1, Denis Ullmo 2, 3, Tatsuro Nagano 1 Physical Review E: Statistical, Nonlinear, and Soft Matter Physics 67 (2003) 067201 Within random matrix theory, the statistics of the eigensolutions depend fundamentally on the presence (or absence) of time reversal symmetry. Accepting the Bohigas-Giannoni-Schmit conjecture, this statement extends to quantum systems with chaotic classical analogs. For practical reasons, much of the […]

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Near optimal configurations in mean field disordered systems

Andrea Pagnani 1, Giorgio Parisi 2, Mathieu Ratieville 1, 2 Physical Review E: Statistical, Nonlinear, and Soft Matter Physics 68 (2003) 046706 We present a general technique to compute how the energy of a configuration varies as a function of its overlap with the ground state in the case of optimization problems. Our approach is based on a generalization of the cavity

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Mesoscopic Fluctuations in Quantum Dots in the Kondo Regime

Ribhu K. Kaul 1, Denis Ullmo 1, 2, Harold U. Baranger 1 Physical Review B 68 (2003) 161305 Properties of the Kondo effect in quantum dots depend sensitively on the coupling parameters and so on the realization of the quantum dot — the Kondo temperature itself becomes a mesoscopic quantity. Assuming chaotic dynamics in the dot, we use random matrix theory to calculate the

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Loop models from Coulomb gases and supersymmetry: Goldstone phases in two-dimensional polymers. Dans Gazeau J-P. et al (eds), Physical and mathematical aspects of symmetries: proceedings of the 24th international colloquium on group theoretical methods in physics

Jacobsen, J.L. Institute of Physics Conference Series 173 (2003) 323-326

Loop models from Coulomb gases and supersymmetry: Goldstone phases in two-dimensional polymers. Dans Gazeau J-P. et al (eds), Physical and mathematical aspects of symmetries: proceedings of the 24th international colloquium on group theoretical methods in physics Lire la suite »

Local Friedel sum rule on graphs

Christophe Texier 1, 2, Markus Buttiker 3 Physical Review B 67 (2003) 245410 We consider graphs made of one-dimensional wires connected at vertices and on which may live a scalar potential. We are interested in a scattering situation where the graph is connected to infinite leads. We investigate relations between the scattering matrix and the continuous part of the local

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