Generating quantum entanglement between macroscopic objects with continuous measurement and feedback control
Generating quantum entanglement between macroscopic objects with continuous measurement and feedback control
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通过连续测量和反馈控制在宏观物体之间产生量子纠缠
DOI：
10.1103/physreva.107.032410
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发表时间：
2023
期刊：
影响因子：
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通讯作者：
Naoki Yamamoto
中科院分区：
文献类型：
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作者：
Daisuke Miki;Nobuyuki Matsumoto;Akira Matsumura;Tomoya Shichijo;Yuuki Sugiyama;Kazuhiro Yamamoto;Naoki Yamamoto
研究了在连续测量和反馈控制条件下，在光机系统中宏观力学镜之间产生量子条件纠缠的可行性。本文研究了在法布里-珀罗-迈克尔逊干涉仪中，通过测量普通和微分输出光束的作用，镜的机械普通和微分运动态的压缩。我们仔细推导出一个协方差矩阵的机械镜在稳态下，采用卡尔曼滤波问题与耗散腔。我们表明，高斯纠缠的机械镜之间产生时，在一个不对称的方式压缩的高纯度的机械镜的公共和差分模式的状态。我们的结果还表明，7-mg镜之间的量子纠缠是可以实现的，在短期内。
This paper is aimed at investigating the feasibility of generating quantum conditional entanglement between macroscopic mechanical mirrors in optomechanical systems while under continuous measurement and feedback control. We consider the squeezing of the states of the mechanical common and the differential motions of the mirrors by the action of measuring the common and the differential output light beams in the Fabry-Pérot-Michelson interferometer. We carefully derive a covariance matrix for the mechanical mirrors in a steady state, employing the Kalman filtering problem with dissipative cavities. We demonstrate that Gaussian entanglement between the mechanical mirrors is generated when the states of the mechanical common and differential modes of the mirrors are squeezed with high purity in an asymmetric manner. Our results also show that quantum entanglement between 7-mg mirrors is achievable in the short term.