Nonreciprocal entanglement in exciton optomechanics with an optical parametric amplifier

TL;DR

This paper demonstrates how an optical parametric amplifier can induce and control nonreciprocal entanglement among photons, excitons, and phonons in a spinning exciton-optomechanical system, even at room temperature.

Contribution

It introduces a method to achieve and regulate nonreciprocal entanglement in an exciton-optomechanical system using an optical parametric amplifier, with experimental feasibility.

Findings

Nonreciprocal entanglement can be achieved with feasible parameters.

OPA enhances photon-exciton and tripartite entanglement.

Photon-exciton entanglement is robust at high temperatures.

Abstract

We study nonreciprocal bipartite and tripartite entanglement in a spinning exciton-optomechanical system (EOMS) with an optical parametric amplifier (OPA). We demonstrate that nonreciprocal entanglement among photons, excitons, and phonons can be achieved under experimentally feasible parameters. We find that the nonreciprocal entanglement induced by Sagnac effects can be regulated through the OPA. Particularly, We show that the OPA significantly enhances photon-exciton entanglement and tripartite entanglement but weakens photon-phonon and exciton-phonon entanglement. Moreover, we find that the photon-exciton nonreciprocal entanglement not only can be generated at room temperature and even higher temperature but also exhibits highly robustness to cavity dissipation. Our works open a way to manipulate the room-temperature nonreciprocal entanglement, which may be useful for developing nonreciprocal quantum technologies.