Counting statistics of single-electron transport in a quantum dot

Details Counting statistics of single-electron transport in a quantum dot Counting statistics of single-electron transport in a quantum dot

2005-10-11

arxiv.org/abs/cond-mat/0510269v3

Phys. Rev. Lett. 96, 076605 (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1103/PhysRevLett.96.076605

We have measured the full counting statistics (FCS) of current fluctuations in a semiconductor quantum dot (QD) by real-time detection of single electron tunneling with a quantum point contact (QPC). This method gives direct access to the distribution function of current fluctuations. Suppression of the second moment (related to the shot noise) and the third moment (related to the asymmetry of the distribution) in a tunable semiconductor QD is demonstrated experimentally. With this method we demonstrate the ability to measure very low current and noise levels.

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