Delocalized single-photon Dicke states and the Leggett- Garg inequality in solid state systems

TL;DR

This paper proposes a method to create and analyze delocalized single-photon Dicke states in solid-state systems, demonstrating their quantum properties through Leggett-Garg inequality tests in large emitter arrays.

Contribution

It introduces a way to realize single-photon Dicke states in solid-state arrays and suggests testing their quantum nature using Leggett-Garg inequalities.

Findings

Large arrays exhibit Rabi-like oscillations.

Arrays can act as mirror-less cavities.

Quantum properties can be tested with Leggett-Garg inequality.

Abstract

We show how to realize a single-photon Dicke state in a large one-dimensional array of two- level systems, and discuss how to test its quantum properties. Realization of single-photon Dicke states relies on the cooperative nature of the interaction between a field reservoir and an array of two-level-emitters. The resulting dynamics of the delocalized state can display Rabi-like oscillations when the number of two-level emitters exceeds several hundred. In this case the large array of emitters is essentially behaving like a mirror-less cavity. We outline how this might be realized using a multiple-quantum-well structure and discuss how the quantum nature of these oscillations could be tested with the Leggett-Garg inequality and its extensions.