Wave function Monte Carlo method for polariton condensates

TL;DR

This paper introduces a quantum jump method combining classical and quantum descriptions to model polariton condensates, accurately capturing linewidth broadening effects due to interactions.

Contribution

It develops a novel wave function Monte Carlo approach for coupled quantum-classical systems in polariton condensates, bridging classical rate equations with quantum mode dynamics.

Findings

Method is equivalent to master equation approach

Successfully computes polariton linewidth including interactions

Provides a new tool for studying polariton condensate dynamics

Abstract

We present a quantum jump approach to describe coupled quantum and classical systems in the context of Bose-Einstein condensation in the solid state. In our formalism, the excitonic gain medium is described by classical rate equations, while the polariton modes are described fully quantum mechanically. We show the equivalence of our method with a master equation approach. As an application, we compute the linewidth of a single mode polariton condensate. Both the line broadening due to the interactions between polaritons and the interactions with the reservoir excitons is taken into account.