Optomechanical entanglement induced by backward stimulated Brillouin scattering

TL;DR

This paper introduces a new scheme for generating robust optomechanical entanglement using backward stimulated Brillouin scattering within an optomechanical structure, showing significant enhancement with strong mechanical coupling.

Contribution

The work demonstrates a novel entanglement generation method based on BSBS, with robustness against thermal fluctuations and potential applications in quantum technologies.

Findings

Entanglement strength increases with mechanical coupling

Entanglement remains robust against thermal noise

Potential extension to microwave and hybrid systems

Abstract

We propose a scheme to generate robust optomechanical entanglement. This scheme is based on a Backward Stimulated Brillouin Scattering (BSBS) process, which is hosted within an optomechanical structure. Our benchmark system consists of an acoustic (mechanical) mode coupled to two optical modes through the BSBS (radiation pressure) process. For a moderate values of the effective mechanical coupling, the BSBS induces a relatively weak entanglement. This entanglement is greatly enhanced, for at least up to one order of magnitude, when the mechanical coupling strength is strong enough. The generated entanglement is robust enough against thermal fluctuation. Our work provides a new scheme for entanglement generation based on BSBS effect, and can be extended to microwaves and hybrid optomechanical structures. Such a generated entangled states can be used for quantum information processing, quantum sensing, and quantum computing.