Superradiance Startup at Finite Temperatures of the Electromagnetic Field

TL;DR

This paper investigates the initial superradiant emission from two-level atoms at finite temperatures using a quantum-electrodynamical approach and the Magnus approximation, accounting for thermal fluctuations.

Contribution

It introduces a quantum-electrodynamical framework with the Magnus approximation to analyze superradiance at finite temperatures, incorporating thermal field effects.

Findings

Derived an expression for emitted quanta considering thermal fluctuations.

Analyzed the initial superradiance stage with thermal electromagnetic fields.

Provided insights into temperature effects on superradiant emission.

Abstract

We use quantum-electrodynamical approach to study the initial stage of Dicke superradiance from a system of two-level atoms. Applying the zeroth-order Magnus approximation, we obtain the expression for the mean number of quanta emitted in the presence of thermal fluctuations of the electromagnetic field.