Ehrenfest time and the coherent backscattering off ballistic cavities

Details Ehrenfest time and the coherent backscattering off ballistic cavities Ehrenfest time and the coherent backscattering off ballistic cavities

2005-12-30

arxiv.org/abs/cond-mat/0512711v2

Phys. Rev. Lett. 96, 196804 (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Revised version, 4 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.96.196804

If the Ehrenfest time tau_E of a ballistic cavity is not negligible in comparison to its dwell time tau_D, the weak localization correction to the cavity's transmission is suppressed proportional to exp(-tau_E/tau_D). At the same time, quantum interference enhances the probability of reflection into the mode of incidence by a factor two. This `enhanced backscattering' does not depend on the Ehrenfest time. We show that, in addition to the diagonal enhanced backscattering, there are off-diagonal contributions to coherent backscattering that become relevant if the Ehrenfest time is not negligible.

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