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arXiv · 1105.3134

Fluctuation theorem for a double quantum dot coupled to a point-contact electrometer

D. S. Golubev·Y. Utsumi·M. Marthaler·Gerd Schoen
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Abstract

We study single-electron transport through a double quantum dot (DQD) monitored by a capacitively coupled quantum point-contact (QPC) electrometer. We derive the full counting statistics for the coupled DQD - QPC system and obtain the joint probability distribution of the charges transferred through the DQD and the QPC consistent with the fluctuation theorem (FT). The system can be described by a master equation with tunneling rates depending of the counting fields and satisfying a generalized local detailed-balance relation. Furthermore, we derive universal relations between the non-linear corrections to the current and noise, which can be verified in experiment.

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D. S. Golubev, Y. Utsumi, M. Marthaler, Gerd Schoen. 2011-05-16. Fluctuation theorem for a double quantum dot coupled to a point-contact electrometer. https://doi.org/10.1103/physrevb.84.075323

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