Dephasing and Dynamic Localization in Quantum Dots

Details Dephasing and Dynamic Localization in Quantum Dots Dephasing and Dynamic Localization in Quantum Dots

2003-12-12

arxiv.org/abs/cond-mat/0312316v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

24 pages, 7 figures, Proceeding of the NATO Conference "Fundamental Problems of Mesoscopic Physics: Interaction and Decoherenc

Scientific paper

The effects of dynamic localization in a solid-state system -- a quantum dot -- are considered. The theory of weak dynamic localization is developed for non-interacting electrons in a closed quantum dot under arbitrary time-dependent perturbation and its equivalence to the theory of weak Anderson localization is demonstrated. The dephasing due to inelastic electron scattering is shown to destroy the dynamic localization in a closed quantum dot leading to the classical energy absorption at times much greater than the inelastic scattering time. Finally a realistic case of a dot weakly connected to leads is studied and it is shown that the dynamic localization may lead to a drastic change of the shape of the Coulomb blockade peak in the dc conductance vs the gate voltage.

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