干涉测量
零差检测
分束器
直接转换接收机
光学
物理
灵敏度(控制系统)
量子极限
参数统计
光参量放大器
干涉可见度
光放大器
天文干涉仪
激光器
电子工程
量子
工程类
数学
量子力学
统计
作者
Tao Shao,Minyang Zhang,Chenlu Li,Yuanxiang Wang,Youyou Hu,Mingming Zhang,Jun Liu
标识
DOI:10.1088/1361-6455/ad065c
摘要
Abstract We have theoretically investigated the phase sensitivity of the hybrid interferometer with two coherent beams using the method of balance homodyne detection. The measurement device is a nonlinear–linear hybrid interferometer consisting of an optical parametric amplifier and a beam splitter. We prove that the phase sensitivity can beat the shot noise limit in the optimal conditions. Furthermore, we derive the quantum Cramér–Rao bound of the hybrid interferometer. The effects of transmission loss and detection loss on the measurement accuracy are discussed. The detection accuracy of this scheme is compared with that of the conventional SU (1,1) interferometer. Our results show that this scheme outperforms the conventional SU (1,1) interferometer scheme at high parametric strength. This scheme can be implemented with existing experimental techniques and will have important applications in quantum precision measurements.
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