Can the exciton--polariton regime be defined by its quantum properties?

TL;DR

This paper investigates whether the exciton-polariton regime can be characterized by its quantum properties, using a quantum model to analyze system-environment interactions and identify regime transitions.

Contribution

It introduces a quantum model that incorporates environment effects to define the exciton-polariton regime via quantum correlations and entropy measures.

Findings

Transition points identified by negativity and linear entropy.

Qualitative agreement with experimental emission properties.

Quantum measures effectively distinguish different regimes.

Abstract

Using a simple fully quantum model in an effective exciton scheme that takes into account the system--environment interaction, we study the different regimes arising in a microcavity--quantum dot system. Our numerical calculations of the emission linewidth, emission energy, integrated intensity and second- and third-order correlation functions are in good qualitative agreement with reported experimental results. We show that the transition from the polariton-laser to the photon-laser regime can be defined through the critical points of both the negativity and the linear entropy of the steady state.