Mirrors-light-atoms entanglement in ring optomechanical cavity

TL;DR

This paper demonstrates how an atomic ensemble in a ring optomechanical cavity can generate robust multimode entanglement, enhancing quantum correlations and resilience to temperature effects in continuous variable systems.

Contribution

It introduces a novel atom-optomechanical system with a ring cavity, analyzing its dynamics and showing improved entanglement properties under realistic conditions.

Findings

Larger entanglement plateau achieved with atomic medium

Enhanced resilience of entanglement to temperature decoherence

Successful simulation of steady-state bipartite and tripartite entanglement

Abstract

The present paper illustrates the realization of an atom-optomechanical system where an atomic ensemble is confined in a ring optomechanical cavity consisting of a fixed mirror and two movable ones. An analysis of the dynamics and the linearization of the equations allows to derive the multimode covariance matrix. Under realistic experimental conditions, we numerically simulate the steady-state bipartite and tripartite continuous variable entanglement using the logarithmic negativity, and analyze the shared entanglement in the multimode system. The introduction of the atomic medium allows to obtain a larger plateau for the entanglement and make more resilient to the temperature decohering effects.