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arXiv:2412.18732 · Physical Review A

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

Yan Wang, Jin‐Lei Wu, Ya‐Feng Jiao, Tian-Xiang Lu, Hui-Lai Zhang, Liying Jiang, Le‐Man Kuang, Hui Jing

Published Jan 9, 2025• 10 citations
arXivHTMLPDF

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.

DOI
10.1103/physreva.111.013709

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We propose a method to enhance bipartite and tripartite entanglement in cavity magnomechanics using an optical parametric amplifier (OPA). We analyze this system and identified parametric regimes where different types of entanglement are enhanced. We show that a proper choice of phase of the parametric amplifier leads to the enhancement of the bipartite entanglements. Moreover, the tripartite entanglement is also significantly enhanced in the presence of the OPA. The OPA not only enhances the strength of entanglement but also increases the domain of entanglement over a wider space of detunings as compared to the system when no OPA is present. Similarly, the robustness of entanglement against temperature is also enhanced. Another important consequence of the OPA is the fact that it relaxes the requirement of strong magnon-phonon coupling to generate cavity-magnon entanglement which is necessary for the case when the OPA is not present. We believe that the presented scheme is a step forward to realize robust quantum entanglement using current technology.
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Quantum entanglement stands as an intriguing and pivotal phenomenon in quantum mechanics, forming the cornerstone for the realization of technologies transcending classical boundaries and enabling the practical deployment of diverse quantum devices. Here, we propose a method to manipulate both the pairwise entanglement among exciton-photon, exciton-phonon, and photon-phonon modes, and the tripartite entanglement involving exciton, photon, and phonon modes, within a hybrid exciton-optomechanics system, utilizing two pump lasers propagating in different directions. We find that all three distinct types of bipartite quantum entanglement and the tripartite entanglement can be effectively controlled and even enhanced along with improved robustness against environmental thermal noise by properly adjusting the phase difference between the two pump lasers. Our findings open up an easily accessible method for manipulating and protecting quantum entanglement, which is crucial in a wide range of practical applications requiring purely quantum resources, such as noise-tolerant quantum processing and quantum precision measurements. © 2026 American Physical Society