Enhancing tripartite photon-phonon-magnon entanglement by synergizing parametric amplifications

TL;DR

This paper proposes a method to significantly enhance tripartite entanglement among magnons, photons, and phonons in a hybrid system by combining optical and mechanical parametric amplifications, improving robustness against noise.

Contribution

It introduces a synergistic approach using phase-matched optical and mechanical parametric amplifications to boost and protect tripartite entanglement in hybrid quantum systems.

Findings

Tripartite entanglement can be enhanced several folds by individual parametric amplifications.

Constructive interference of OPA and MPA further boosts entanglement strength.

The method improves entanglement robustness against thermal noise.

Abstract

Tripartite entanglement as a remarkable resource in quantum information science has been extensively investigated in hybrid quantum systems, whereas it is generally weak and prone to be suppressed by noise, restricting its practical application in quantum technologies. Here, we propose how to enhance the tripartite entanglement among magnons, photons and phonons in a hybrid cavity-magnon optomechanical system by exploiting a synergistic effect of the optical parametric amplification (OPA) and mechanical parametric amplification (MPA). We find that in the case of individually applying the OPA or MPA, the tripartite entanglement can be enhanced by several folds. Remarkably, upon suitably tuning the phase matching of the two parametric fields presented simultaneously, the strengths of the entanglement can be further enhanced due to the constructive interference between the OPA and MPA. We also show that our method can improve the robustness of the entanglement against thermal noise. Our work provides a promising method for manipulating the entanglement with easy tunability and may serve as a useful tool for the enhancement and protection of fragile quantum resources.