Interplay between electron pairing and Dicke effect in triple quantum dots structures

TL;DR

This paper investigates how electron pairing affects the Dicke effect in triple quantum dot structures, proposing an experimental detection method via subgap Andreev spectroscopy, with observations in the Kondo regime.

Contribution

It introduces the influence of proximity-induced pairing on the Dicke effect in quantum dots and suggests a feasible experimental detection approach.

Findings

Dicke effect manifests in differential conductance in the Kondo regime.

Proposed subgap Andreev spectroscopy to detect superradiant/subradiant states.

Electron pairing modifies the Dicke effect in quantum dot heterostructures.

Abstract

We study the influence of the proximity-induced pairing on electronic version of the Dicke effect in a heterostructure, comprising three quantum dots vertically coupled between the metallic and superconducting leads. We discuss a feasible experimental procedure for detecting the narrow/broad (subradiant/superradiant) contributions by means of the subgap Andreev spectroscopy. In the Kondo regime and for small energy level detuning the Dicke effect is manifested in the differential conductance.