AI 中文总结
该研究提出通过相位控制磁振子压缩在光磁机械环形腔中产生可切换纠缠的理论方案，利用磁致伸缩耦合使亚铁磁微桥与腔场、机械运动纠缠，通过相位相关贡献实现原位控制，为实现高对比度纠缠提供途径，确立磁振子压缩为实用量子资源。
AI 中文摘要
腔光磁机械为探索宏观量子关联，特别是非互易纠缠提供了一个通用平台。在这项工作中，我们提出了一种理论方案，通过利用相位控制的磁振子压缩在光磁机械环形腔中产生可切换的二分体和三分体纠缠。两个空间分离的亚铁磁YIG微桥通过磁致伸缩介导的耦合与机械运动以及通过辐射压力相互作用的共同腔场纠缠。压缩过程对磁振子响应引入了两个与相位相关的贡献，即有效失谐位移$\Delta_{\theta_j}$和正交阻尼贡献$\kappa_{\theta_j}$，两者在$\pi$相移时符号反转，提供了对纠缠响应切换的原位控制。非互易纠缠通过相位反转$\theta_j \to \theta_j + \pi$下的不对称纠缠响应来操作定义，由归一化对比度$C_E$和$C_{\mathcal{R}}$量化，它们测量在$\theta_j$和相位反转配置$\theta_j+\pi$处获得的纠缠之间的相对差异。由此产生的相位调谐方法提供了一条灵活且稳健的途径，以在稳定参数区域内实现高对比度的二分体和三分体纠缠，将磁振子压缩确立为混合平台中可切换量子关联的实用量子资源。
英文摘要
Cavity optomagnomechanics provides a versatile platform to explore macroscopic quantum correlations, particularly nonreciprocal entanglement. In this work, we propose a theoretical scheme to generate switchable bipartite and tripartite entanglement in an optomagnomechanical ring cavity by exploiting phase-controlled magnon squeezing. Indeed, two spatially separated ferrimagnetic YIG microbridges become entangled through their magnetostriction-mediated coupling to mechanical motion and a common cavity field via radiation-pressure interaction. The squeezing process introduces two phase-dependent contributions to the magnon response, namely an effective detuning shift $Δ_{θ_j}$ and a quadrature-damping contribution $κ_{θ_j}$, both of which reverse sign upon a $π$ phase shift, providing an in situ control to switch the entanglement response. The nonreciprocal entanglement is defined operationally through the asymmetric entanglement response under the phase reversal $θ_j \to θ_j + π$, quantified by normalized contrast ratios $C_E$ and $C_{\mathcal{R}}$, which measure the relative difference between the entanglement obtained at $θ_j$ and at the phase-reversed configuration $θ_j+π$. The resulting phase-tuning method provides a flexible and robust route to achieve high-contrast bipartite and tripartite entanglement within stable parameter regions, establishing magnon squeezing as a practical quantum resource for switchable quantum correlations in hybrid platforms.
Comments7 figures. Accepted for publication in Phys. Rev. A
Journal refPhys. Rev. A 114, 012460 (2026)
