发表机构
IMEC; Hasselt University; University of Ngaoundere; Stellenbosch Institute for Advanced Study (STIAS), Wallenberg Research Centre at Stellenbosch University; CNRS, Université de Lille, Centrale Lille, Université Polytechnique Hauts-de-France（IMEC; 哈瑟尔特大学; 恩冈德雷大学; 斯泰伦博斯大学瓦伦伯格高级研究院（STIAS）; 法国国家科学研究中心、里尔大学、中央里尔学院、上法兰西理工学院）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究提出耦合双机械振子的光机械系统方案，发现纠缠与贝尔非定域性存在权衡，引入相位依赖声子隧穿可选择性增强特定暗模式下的贝尔非定域性，为量子通信提供实验可行平台。
AI 中文摘要
本研究提出了一个由两个机械振子耦合到一个共同腔构成的光机械系统的详细方案，旨在产生纯的、纠缠的双模压缩机械稳态。我们发现，在纠缠最大的地方可能不会出现贝尔测量违反；相反，对于较低纠缠态可观察到非定域性。一个核心结果是，光机械耦合缺陷可通过降低机械态的纯度来增强机械纠缠，同时抑制贝尔非定域性。为缓解这种权衡，我们引入机械振子间的相位依赖声子隧穿，并表明，即使整体纠缠降低，在特定暗模式构型中仍可选择性增强贝尔非定域性。我们将这种对比行为归因于与玻戈留波夫模式占据不平衡相关的态纯度变化。该方案与现有微波腔光机械平台兼容，为控制多模机械系统中的非局域量子关联提供了实验可及的途径，可作为连续变量隐形传态和高保真量子通信部署的有吸引力的平台。
英文摘要
This study presents a detailed proposal for an optomechanical system consisting of two mechanical oscillators coupled to a common cavity, aimed at generating pure and entangled two-mode squeezed mechanical steady states. We found that the violation of Bell's measurement may not occur where the entanglement is maximum; rather, nonlocality can be observed for lower entangled states. A central result is that optomechanical coupling imperfections can enhance mechanical entanglement while simultaneously suppressing Bell nonlocality by reducing the purity of the mechanical state. To mitigate this trade-off, we introduce phase-dependent phonon hopping between the mechanical oscillators and show that Bell nonlocality can be selectively enhanced in specific dark-mode configurations, even when the overall entanglement is reduced. We trace this contrasting behaviorto changes in state purity associated with the imbalance of the Bogoliubov-mode occupations. Compatible with existing microwave cavity optomechanical platforms, the proposed architecture provides an experimentally accessible route for controlling nonlocal quantum correlations in multimode mechanical systems. Our proposed scheme serves as an attractive platform for the deployment of continuous-variable teleportation and high-fidelity quantum communication.
Comments13 pages, 10 figures
