Dynamical quantum depletion in polariton condensates

TL;DR

This paper provides a theoretical analysis of quantum depletion in microcavity polariton condensates excited by resonant laser pulses, exploring quantum fluctuations, correlation functions, and effects akin to the dynamical Casimir effect.

Contribution

It introduces a comprehensive theoretical framework combining analytical and numerical methods to study quantum depletion dynamics in polariton condensates.

Findings

Quantum depletion dynamics characterized in polariton condensates.

Analytical results derived for homogeneous systems.

Numerical simulations performed for inhomogeneous systems.

Abstract

We present a theoretical study of the quantum depletion of microcavity polaritons that are excited with a resonant laser pulse. The dynamics of the quantum fluctuations are interpreted in the context of quantum quenches in general and in terms of the dynamical Casimir effect in particular. We compute the time evolution of the first and second order correlation functions of the polariton condensate. Our theoretical modelling is based on the truncated Wigner approximation for interacting Bose gases. For homogeneous systems, analytical results are obtained in the linearised Bogoliubov approximation. Inhomogeneous systems are studied numerically by Monte Carlo simulations.