Analysis of shot noise suppression in mesoscopic cavities in a magnetic field

TL;DR

This paper numerically investigates how shot noise is suppressed in mesoscopic cavities under magnetic fields, explaining the phenomenon through semiclassical analysis and matching experimental data without fitting parameters.

Contribution

It provides a novel semiclassical explanation for shot noise suppression in mesoscopic cavities influenced by magnetic fields, supported by numerical simulations and experimental agreement.

Findings

Shot noise decreases with increasing magnetic field.

Suppression is due to interplay between cyclotron orbits and cavity apertures.

Numerical results align with experimental data without fitting parameters.

Abstract

We present a numerical investigation of shot noise suppression in mesoscopic cavities and an intuitive semiclassical explanation of the behavior observed in the presence of an orthogonal magnetic field. In particular, we conclude that the decrease of shot noise for increasing magnetic field is the result of the interplay between the diameter of classical cyclotron orbits and the width of the apertures defining the cavity. Good agreement with published experimental results is obtained, without the need of introducing fitting parameters.