Counting statistics of cotunneling electrons

Details Counting statistics of cotunneling electrons Counting statistics of cotunneling electrons

2009-02-20

arxiv.org/abs/0902.3544v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

11 pages, 6 figures

Scientific paper

We describe a method for calculating the counting statistics of electronic transport through nanoscale devices with both sequential and cotunneling contributions. The method is based upon a perturbative expansion of the von Neumann equation in Liouvillian space, with current cumulants calculated from the resulting nonMarkovian master equation without further approximation. As application, we consider transport through a single quantum dot and discuss the effects of cotunneling on noise and skewness, as well as the properties of various approximation schemes.

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