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Quantum transport through ballistic cavities: soft vs hard quantum chaos.

作者信息

Huckestein B, Ketzmerick R, Lewenkopf CH

机构信息

Institut fur Theoretische Physik, Universitat zu Koln, D-50937 Koln, Germany.

出版信息

Phys Rev Lett. 2000 Jun 12;84(24):5504-7. doi: 10.1103/PhysRevLett.84.5504.

DOI:10.1103/PhysRevLett.84.5504
PMID:10990980
Abstract

We study transport through a two-dimensional billiard attached to two infinite leads by numerically calculating the Landauer conductance and the Wigner time delay. In the generic case of a mixed phase space we find a power-law distribution of resonance widths and a power-law dependence of conductance increments apparently reflecting the classical dwell time exponent, in striking difference to the case of a fully chaotic phase space. Surprisingly, these power laws appear on energy scales below the mean level spacing, in contrast to semiclassical expectations.

摘要

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