We report our study of the real-time charge counting statistics measured by a quantum point contact (QPC) coupled to a single quantum dot (QD) under different back-action strength. By tuning the QD-QPC coupling or QPC bias, we controlled the QPC back-action which drives the QD electrons out of thermal equilibrium. The random telegraph signal (RTS) statistics showed strong and tunable non-thermal-equilibrium saturation effect, which can be quantitatively characterized as a back-action induced tunneling out rate. We found that the QD-QPC coupling and QPC bias voltage played different roles on the back-action strength and cut-off energy.
Cite
@article{arxiv.1108.4302,
title = {Back-action Induced Non-equilibrium Effect in Electron Charge Counting Statistics},
author = {HaiOu Li and Ming Xiao and Gang Cao and Cheng Zhou and RuNan Shang and Tao Tu and GuangCan Guo and GuoPing Guo and HongWen Jiang},
journal= {arXiv preprint arXiv:1108.4302},
year = {2015}
}