Theory of Dephasing by External Perturbation in Open Quantum Dots

TL;DR

This paper develops a random matrix theory to analyze how time-dependent external fields affect the magnetoresistance in open quantum dots, considering all orders of perturbation for both weak and strong fields.

Contribution

It introduces a comprehensive random matrix framework that captures the influence of external perturbations on quantum dot magnetoresistance across different field strengths.

Findings

Applicable to both weak and strong external fields.

Provides a perturbation theory that sums all orders.

Enhances understanding of quantum dot transport properties.

Abstract

We propose a random matrix theory describing the influence of a time dependent external field on the average magnetoresistance of open quantum dots. The effect is taken into account in all orders of perturbation theory, and the result is applicable to both weak and strong external fields.