Multipartite optomechanical entanglement from competing nonlinearities

TL;DR

This paper explores the generation and characterization of tripartite entanglement in a microtoroid optomechanical system with nonlinear chi^(2) interactions, highlighting its potential for observing complex quantum dynamics.

Contribution

It introduces a novel approach to produce and analyze three-mode entanglement in microtoroids with significant nonlinearities, advancing quantum optomechanics.

Findings

Potential to observe genuine tripartite steady-state entanglement

Method for full characterization of three-mode quantum states

Relevance of nonlinear chi^(2) interactions in microtoroids

Abstract

We investigate the nature of the three-mode interaction inside an optomechanically-active microtoroid with a sizeable chi^(2) coefficient. Experimental techniques are quickly advancing to the point where structures with the necessary properties can be made, and we argue that these provide a natural setting in which to observe rich dynamics leading, for instance, to genuine tripartite steady-state entanglement. We also show that this approach lends itself to a full characterisation of the three-mode state of the system.