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

Welack, Sven; Esposito, Massimiliano; Harbola, Upendra; Mukamel, Shaul

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

Authors

Welack, Sven

Esposito, Massimiliano

Harbola, Upendra

Mukamel, Shaul

Description

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.
11 pages, 12 figures