Current fluctuations of an interacting quantum dot

Details Current fluctuations of an interacting quantum dot Current fluctuations of an interacting quantum dot

2004-08-31

arxiv.org/abs/cond-mat/0408666v2

Phys. Rev. Lett. 94, 166803 (2005)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 2 figures, published version

Scientific paper

10.1103/PhysRevLett.94.166803

We calculate the counting statistics of electron transfer through an open quantum dot with charging interaction. A dot that is connected to leads by two single-channel quantum point contacts in an in-plane magnetic field is described by a Luttinger liquid with impurity at the Toulouse point. We find that the fluctuations of the current through this conductor exhibit distinctive interaction effects. Fluctuations saturate at high voltages, while the mean current increases linearly with the bias voltage. All cumulants higher than the second one reach at large bias a temperature independent limit.

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