Interference effects in the counting statistics of electron transfers through a double quantum dot

Details Interference effects in the counting statistics of electron transfers through a double quantum dot Interference effects in the counting statistics of electron transfers through a double quantum dot

2007-09-21

arxiv.org/abs/0709.3551v2

Phys. Rev. B 77, 195315 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

11 pages, 12 figures

Scientific paper

10.1103/PhysRevB.77.195315

We investigate the effect of quantum interferences and Coulomb interaction on the counting statistics of electrons crossing a double quantum dot in a parallel geometry using a generating function technique based on a quantum master equation approach. The skewness and the average residence time of electrons in the dots are shown to be the quantities most sensitive to interferences and Coulomb coupling. The joint probabilities of consecutive electron transfer processes show characteristic temporal oscillations due to interference. The steady-state fluctuation theorem which predicts a universal connection between the number of forward and backward transfer events is shown to hold even in the presence of Coulomb coupling and interference.

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