Dense dipole-dipole-coupled two-level systems in a thermal bath

TL;DR

This paper investigates the quantum dynamics of dense, dipole-dipole coupled two-level systems in a thermal bath, revealing how environmental interactions influence collective emission and the quantum nature of scattered light.

Contribution

It provides a detailed analysis of how strong but sub-transition frequency dipole-dipole interactions affect quantum equilibrium and emission properties in thermal environments.

Findings

Quantum nature of scattered light confirmed under various thermal conditions.

Collective emission intensity can be suppressed or enhanced by thermal bath strength.

Dipole-dipole interactions significantly influence the quantum dynamics of the ensemble.

Abstract

The quantum dynamics of a dense and dipole-dipole coupled ensemble of two-level emitters interacting via their environmental thermostat is investigated. The static dipole-dipole interaction strengths are being considered strong enough but smaller than the transition frequency. Therefore, the established thermal equilibrium of ensemble's quantum dynamics is described with respect to the dipole-dipole coupling strengths. We have demonstrated the quantum nature of the spontaneously scattered light field in this process for weaker thermal baths as well as non-negligible dipole-dipole couplings compared to the emitter's transition frequency. Furthermore, the collectively emitted photon intensity suppresses or enhances depending on the environmental thermal baths intensities.