Waiting time distributions of electron transfers through quantum dot Aharonov-Bohm interferometers

TL;DR

This paper introduces a statistical method to analyze quantum interference effects in electron transfers through a double quantum dot Aharonov-Bohm interferometer, revealing phase-sensitive oscillations and interference signatures.

Contribution

It presents a novel time series analysis approach for detecting quantum interference in electron transfer waiting time distributions.

Findings

Waiting time distributions reveal quantum interference effects.

Interdot transfer oscillations are phase-sensitive.

Interference signatures are clearer with weakly coupled detectors.

Abstract

We present a statistical readout method for quantum interferences based on time series analysis of consecutive single electron transfers through a double quantum dot Aharonov-Bohm interferometer. Waiting time distributions qualitatively indicate the presence of interferences and provide information on orbital-detuning and coherent interdot-electron transfer. Interdot transfer induced oscillations are Aharonov-Bohm phase sensitive, while those due to level detuning are phase-independent. The signature of the quantum interference in the waiting time distribution is more apparent for weakly coupled electron transfer detectors.