Bipartite and tripartite output entanglement in 3-mode optomechanical systems

TL;DR

This paper analytically investigates stationary entanglement in a 3-mode optomechanical system, revealing optimal conditions for strong bipartite and tripartite entanglement, including divergence near stability boundaries.

Contribution

It provides analytic insights into entanglement generation, identifying parameter regimes for maximal entanglement and demonstrating tripartite entanglement divergence at stability limits.

Findings

Strong bipartite entanglement achievable with weak couplings

Tripartite entanglement diverges near stability boundary

Optimal parameter regimes for maximal entanglement

Abstract

We provide analytic insight into the generation of stationary itinerant photon entanglement in a 3-mode optomechanical system. We identify the parameter regime of maximal entanglement, and show that strong entanglement is possible even for weak many-photon optomechanical couplings. We also show that strong tripartite entanglement is generated between the photonic and phononic output fields; unlike the bipartite photon-photon entanglement, this tripartite entanglement diverges as one approaches the boundary of system stability.