# Decondensation in non-equilibrium photonic condensates: when less is more

## TL;DR

This paper explores the complex phase behavior of photons in a dye-filled microcavity, revealing how varying pump and thermalization can lead to diverse states like Bose-Einstein condensation, multimode condensation, lasing, and unexpected decondensation phenomena.

## Contribution

It provides a detailed non-equilibrium phase diagram of photonic states, highlighting the novel decondensation of modes under certain conditions.

## Key findings

- Identification of multiple phase transitions including condensation and lasing
- Observation of mode decondensation in non-equilibrium conditions
- Rich phase diagram illustrating complex photon behaviors

## Abstract

We investigate the steady state of a system of photons in a pumped dye-filled microcavity. By varying pump and thermalization the system can be tuned between Bose-Einstein condensation, multimode condensation, and lasing. We present a rich non-equilibrium phase diagram which exhibits transitions between these phases, including decondensation of individual modes under conditions that would typically favor condensation.