The third moment of current fluctuations in a tunnel junction: experiments in the classical and quantum regimes

TL;DR

This paper presents the first experimental measurement of the third moment of current fluctuations in a tunnel junction, demonstrating it equals e^2 times the current in both classical and quantum regimes, with environmental effects considered.

Contribution

It provides the first experimental data of the third moment of current fluctuations in a tunnel junction across classical and quantum regimes.

Findings

Third moment equals e^2 I in both regimes

Environmental effects influence the measurements

Results confirm theoretical predictions

Abstract

We report the first experimental data of the third moment of current fluctuations in a tunnel junction. We show that both in the classical and quantum regimes (low or high frequency as compared to voltage), it is given by $S_{I^3}=e^2I$. We discuss environmental effects in both regimes.