From quantum disorder to quantum chaos

Details From quantum disorder to quantum chaos From quantum disorder to quantum chaos

2001-07-26

arxiv.org/abs/cond-mat/0107552v1

J. Low Temp. Phys., 126, 1339 (2002)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

15 pages, no figures. Contribution to a special issue of J. Low Temp. Phys. dedicated to Peter Woelfle's 60th birthday

Scientific paper

10.1023/A:1013848220378

We study the statistics of wave functions in a ballistic chaotic system. The statistical ensemble is generated by adding weak smooth random potential, which allows us to apply the ballistic $\sigma$-model approach. We analyze conditions of applicability of the $\sigma$-model, emphasizing the role played by the single-particle mean free path and the Lyapunov exponent due to the random potential. In particular, we present a resolution of the puzzle of repetitions of periodic orbits counted differently by the $\sigma$-model and by the trace formula.

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