Weak localization of short pulses in disordered waveguides

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We consider the phenomenon of weak localization of a short wave pulse in a quasi-1D disordered waveguide. We show that the long-time decay of the average transmission coefficient is not purely exponential, in contradiction with predictions of the diffusion theory. The diffusion theory breaks down completely for times exceeding the Heisenberg time. We also study the survival probability of a quantum particle in a disordered waveguide and compare our results with previous calculations using the super-symmetric nonlinear sigma model.
4 pages, to appear in Acta Phys. Pol. A (Proceedings of the 2nd Workshop on Quantum Chaos and Localization Phenomena, May 19-22, 2005, Warsaw)

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Disordered Systems and Neural Networks, Mesoscale and Nanoscale Physics

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http://salesiana.dossiersoluciones.com/handle/123456789/97468

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0508104
 http://arxiv.org/abs/cond-mat/0508104
 Acta Physica Polonica A 109, 101-108 (2006)

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arXiv