Tunable dynamical channel blockade in double-dot Aharonov-Bohm interferometers

TL;DR

This paper investigates how magnetic flux can tune dynamical channel blockade in a double-dot Aharonov-Bohm interferometer, revealing super-Poissonian noise behavior linked to interference effects and charging energy.

Contribution

It introduces a detailed analysis of tunable dynamical channel blockade in quantum dot interferometers considering full counting statistics.

Findings

Super-Poissonian noise with diverging cumulants near flux quanta

Interference and charging energy interplay causes channel blockade

Magnetic flux controls the blockade and noise characteristics

Abstract

We study electronic transport through an Aharonov-Bohm interferometer with single-level quantum dots embedded in the two arms. The full counting statistics in the shot-noise regime is calculated to first order in the tunnel-coupling strength. The interplay of interference and charging energy in the dots leads to a dynamical channel blockade that is tunable by the magnetic flux penetrating the Aharonov-Bohm ring. We find super-Poissonian behavior with diverging second and higher cumulants when the Aharonov-Bohm flux approaches an integer multiple of the flux quantum.