Direct signatures of Anderson orthogonality catastrophe in nonequilibrium quantum dots

TL;DR

This paper proposes experimental schemes to directly observe Anderson orthogonality catastrophe effects in quantum dots, demonstrating how measurable observables depend on the AOC exponent in non-equilibrium conditions.

Contribution

It introduces a rate equation formalism that accurately incorporates AOC effects into tunnel rate calculations for quantum dots.

Findings

Observable dependence on AOC exponent in non-equilibrium regimes

Robust measurable signatures of AOC effects

Method to estimate AOC strength from experimental data

Abstract

We propose schemes for unambiguous direct observation of Anderson orthogonality catastrophe (AOC) effects in a quantum dot coupled to a charge detector, and to estimate the strength of the AOC exponent $\alpha$. We show that certain easy-to-measure observables have a robust dependence on $\alpha$ in the non-equilibrium regimes of source-drain voltage bias or thermal imbalance. Our results are obtained using a rate equation formalism in which the AOC effects on tunnel rates are incorporated in an exact manner.