Emergence of entanglement from a noisy environment: The case of polaritons

TL;DR

This paper theoretically demonstrates that highly entangled polariton pairs can be generated via parametric scattering in noisy environments, showing robustness of entanglement in solid-state systems despite incoherent noise.

Contribution

It introduces a microscopic quantum statistical model that quantitatively assesses entanglement in polaritons under realistic noisy conditions.

Findings

High polarization entanglement achievable at low excitation densities

Entanglement persists despite dominance of incoherent photoluminescence

Model confirms robustness of pair correlations in noisy solid-state environments

Abstract

We show theoretically that polariton pairs with a high degree of polarization entanglement can be produced through parametric scattering. We demonstrate that it can emerge in coincidence experiments, even at low excitation densities where the dynamics is dominated by incoherent photoluminesce. Our analysis is based on a microscopic quantum statistical approach that treats coherent and incoherent processes on an equal footing, thus allowing for a quantitative assessment of the amount of entanglement under realistic experimental conditions. This result puts forward the robustness of pair correlations in solid-state devices, even when noise dominates one-body correlations.