Single-Electron Tunneling and the Fluctuation Theorem

Details Single-Electron Tunneling and the Fluctuation Theorem Single-Electron Tunneling and the Fluctuation Theorem

2009-11-29

arxiv.org/abs/0911.5469v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Prepared for "Perspectives of Mesoscopic Physics - Dedicated to Prof. Yoseph Imry's 70th Birthday"

Scientific paper

Experiments on the direction-resolved full-counting statistics of single-electron tunneling allow testing the fundamentally important Fluctuation Theorem (FT). At the same time, the FT provides a frame for analyzing such data. Here we consider tunneling through a double quantum dot system which is coupled capacitively to a quantum point contact (QPC) detector. Fluctuations of the environment, including the shot noise of the QPC, lead to an enhancement of the effective temperature in the FT. We provide a quantitative explanation of this effect; in addition we discuss the influence of the finite detector bandwidth on the measurements.

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