Sub-Poissonian Shot Noise In A Diffusive Conductor

TL;DR

This paper reviews the shot-noise properties of diffusive metallic conductors, highlighting the universal one-third suppression of shot noise due to transmission eigenvalue distribution, supported by semiclassical and theoretical derivations.

Contribution

It demonstrates that the one-third shot noise suppression is a fundamental property of diffusive conductors, derived from both semiclassical calculations and Oseledec's theorem.

Findings

Shot noise is one third of Poisson noise in diffusive conductors.

Bimodal distribution of transmission eigenvalues explains shot noise suppression.

The result is consistent with semiclassical and theoretical approaches.

Abstract

A review is given of the shot-noise properties of metallic, diffusive conductors. The shot noise is one third of the Poisson noise, due to the bimodal distribution of transmission eigenvalues. The same result can be obtained from a semiclassical calculation. Starting from Oseledec's theorem it is shown that the bimodal distribution is required by Ohm's law.