The effect of large quantum fluctuation on the noise of a single-electron transistor

TL;DR

This paper theoretically examines how large quantum fluctuations influence charge noise in a single-electron transistor, revealing charge noise suppression due to charge renormalization but not eliminating charge quantization, impacting electrometer performance.

Contribution

It introduces a theoretical analysis of quantum fluctuation effects on noise and charge quantization in single-electron transistors, highlighting the impact on device performance.

Findings

Charge noise is suppressed by charge renormalization.

Quantum fluctuations do not eliminate charge quantization.

Renormalization reduces electrometer performance.

Abstract

We theoretically investigate the noise of a single-electron transistor in the regime of large quantum fluctuation of charge out of equilibrium. We show that the charge noise is suppressed due to the charge renormalization caused by the quantum fluctuation. However the fluctuation is not strong enough to wash out the charge quantization. We find that the renormalization effect reduces the performance of a single-electron electrometer.