Calculation of dephasing times in closed quantum dots

Details Calculation of dephasing times in closed quantum dots Calculation of dephasing times in closed quantum dots

2001-10-30

arxiv.org/abs/cond-mat/0110609v1

Phys. Rev. Lett. 88, 136801 (2002)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.88.136801

Dephasing of one-particle states in closed quantum dots is analyzed within the framework of random matrix theory and Master equation. Combination of this analysis with recent experiments on the magnetoconductance allows for the first time to evaluate the dephasing times of closed quantum dots. These dephasing times turn out to depend on the mean level spacing and to be significantly enhanced as compared with the case of open dots. Moreover, the experimental data available are consistent with the prediction that the dephasing of one-particle states in finite closed systems disappears at low enough energies and temperatures.

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