Superradiant and Aharonov-Bohm effect for the quantum ring exciton

TL;DR

This paper investigates how the Aharonov-Bohm effect and superradiance influence the exciton decay rate in quantum rings, revealing a competitive relationship that varies with ring size and could be observed experimentally.

Contribution

It provides a detailed analysis of the interplay between superradiance and Aharonov-Bohm oscillations in quantum ring excitons, highlighting their dependence on ring radius.

Findings

Decay rate increases with ring radius due to superradiance.

Aharonov-Bohm oscillation amplitude decreases as ring size grows.

The competition between effects is observable in time-resolved experiments.

Abstract

The Aharonov-Bohm and superradiant effect on the redaitive decay rate of an exciton in a quantum ring is studied. With the increasing of ring radius, the exciton decay rate is enhanced by superradiance, while the amplitude of AB oscillation is decreased. The competition between these two effects is shown explicitly and may be observable in time-resolved exeriments.