Entangled light from driven dissipative microcavities

TL;DR

This paper demonstrates how driven dissipative microcavities can generate robust entangled light, specifically in a W-state, using nonlinear polariton dynamics influenced by losses, vibrations, and external driving.

Contribution

It introduces a novel pump configuration in microcavities that produces entangled light through dissipative polariton interactions, analyzed with a comprehensive Langevin approach.

Findings

Entangled light in a W-state can be generated in microcavities.

The entanglement remains robust against decoherence.

Solid-state pair correlations can stabilize nonlocal radiation properties.

Abstract

We study the generation of entangled light in planar semiconductor microcavities. The focus is on a particular pump configuration where the dissipative internal polariton dynamics leads to the emission of entangled light in a W-state. Our study is based on the nonlinear equations of motion for the polariton operators derived within the dynamics-controlled truncation formalism. They include the losses through the cavity mirrors, the interaction with lattice vibrations, and the external laser driving in a Langevin approach. We find that the generated entanglement is robust against decoherence under realistic experimental conditions. The results show that pair correlations in solid-state devices can be used to stabilize the nonlocal properties of the emitted radiation.