On Classical Fluctuations of Ballistic Conductance

TL;DR

This paper explores how classical phase space bending in chaotic ballistic systems enhances conductance fluctuations beyond the universal quantum mesoscopic effects, highlighting a classical origin of large sample-to-sample variations.

Contribution

It demonstrates that classical phase space dynamics significantly increase conductance fluctuations in ballistic cavities with chaotic behavior, extending understanding beyond quantum effects.

Findings

Classical phase space bending amplifies conductance fluctuations.

Chaotic dynamics lead to larger sample-to-sample variations.

Classical effects can dominate over quantum fluctuations in certain systems.

Abstract

Universal conductance fluctuations in disordered systems are one of the most known quantum mesoscopic effects. For ballistic cavity with smooth confining potential however, one should observe a much larger classical sample-to-sample conductance fluctuations. It is shown, how bending of the phase space in case of chaotic dynamics leads to additional enhancement of such fluctuations.