Weak localization of short pulses in disordered waveguides

Details Weak localization of short pulses in disordered waveguides Weak localization of short pulses in disordered waveguides

2005-08-03

arxiv.org/abs/cond-mat/0508104v1

Acta Physica Polonica A 109, 101-108 (2006)

Physics

Condensed Matter

Disordered Systems and Neural Networks

4 pages, to appear in Acta Phys. Pol. A (Proceedings of the 2nd Workshop on Quantum Chaos and Localization Phenomena, May 19-2

Scientific paper

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.

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