Quasi-Langevin method for shot noise calculation in single-electron tunneling

TL;DR

This paper introduces a quasi-Langevin method for calculating shot noise in correlated single-electron tunneling, extending existing approaches to include high-frequency quantum effects.

Contribution

It generalizes the Fokker-Planck approach and demonstrates its equivalence to the quasi-Langevin method, enabling simultaneous high-frequency analysis.

Findings

Quasi-Langevin method effectively calculates shot noise in single-electron tunneling.

The approach captures high-frequency quantum effects.

Equivalence between Fokker-Planck and quasi-Langevin methods is established.

Abstract

It is shown that quasi-Langevin method can be used for the calculation of the shot noise in correlated single-electron tunneling. We generalize the existing Fokker-Plank-type approach and show its equivalence to quasi-Langevin approach. The advantage of the quasi-Langevin method is a natural possibility to describe simultaneously the high (``quantum'') frequency range.