Dynamics of Phase Coherence Onset in Bose Condensates of Photons by Incoherent Phonon Emission

TL;DR

This paper investigates how photon Bose-Einstein condensation can occur through incoherent phonon interactions alone, without direct particle-particle interactions, and demonstrates the potential for spontaneous quantum coherence amplification.

Contribution

It provides theoretical evidence that incoherent phonon interactions can induce Bose condensation and coherence in photon systems, expanding understanding beyond particle-particle interaction models.

Findings

Photon systems can Bose condense via incoherent phonon interactions.

Spontaneous amplification of quantum coherence is possible without particle-particle interactions.

Theoretical framework supports experimental observations of photon Bose condensation.

Abstract

Recent experiments with photons equilibrating inside a dye medium in a cavity have raised the question of whether Bose condensation can occur in a system with only incoherent interaction with phonons in a bath but without particle-particle interaction. Analytical calculations analogous to those done for a system with particle-particle interactions indicate that a system of bosons interacting only with incoherent phonons can indeed undergo Bose condensation and furthermore can exhibit spontaneous amplification of quantum coherence. We review the basic theory for these calculations.