# Superradiance with local phase-breaking effects

## TL;DR

This paper analyzes how phase-breaking effects like non-radiative losses and dephasing influence superradiance in two-level systems, revealing that superfluorescent bursts can still occur under realistic solid-state conditions.

## Contribution

It introduces a comprehensive model of superradiance considering phase-breaking mechanisms and applies it to dilute excitation regimes in solid-state systems.

## Key findings

- Superfluorescent bursts are observable despite high dephasing rates.
- Dephasing and losses affect inter-mode scattering and quasiparticle lifetimes.
- Superradiance persists in solid-state systems with realistic phase-breaking effects.

## Abstract

We study the superradiant evolution of a set of $N$ two-level systems spontaneously radiating under the effect of phase-breaking mechanisms. We investigate the dynamics generated by non-radiative losses and pure dephasing, and their interplay with spontaneous emission. Our results show that in the parameter region relevant to many solid-state cavity quantum electrodynamics experiments, even with a dephasing rate much faster than the radiative lifetime of a single two-level system, a sub-optimal collective superfluorescent burst is still observable. We also apply our theory to the dilute excitation regime, often used to describe optical excitations in solid-state systems. In this regime, excitations can be described in terms of bright and dark bosonic quasiparticles. We show how the effect of dephasing and losses in this regime translates into inter-mode scattering rates and quasiparticle lifetimes.