Irreversibility on the Level of Single-Electron Tunneling

Details Irreversibility on the Level of Single-Electron Tunneling Irreversibility on the Level of Single-Electron Tunneling

2011-07-21

arxiv.org/abs/1107.4240v2

Physical Review X 2, 011001 (2012)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1103/PhysRevX.2.011001

We present a low-temperature experimental test of the fluctuation theorem for electron transport through a double quantum dot. The rare entropy-consuming system trajectories are detected in the form of single charges flowing against the source-drain bias by using time-resolved charge detection with a quantum point contact. We find that these trajectories appear with a frequency that agrees with the theoretical predictions even under strong nonequilibrium conditions, when the finite bandwidth of the charge detection is taken into account.

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