Parameter accuracy analysis of weak-value amplification process in the presence of noise  

作　　者：Jiangdong Qiu Zhaoxue Li Linguo Xie Lan Luo Yu He Changliang Ren Zhiyou Zhang Jinglei Du 邱疆冬;李兆雪;谢林果;罗兰;何宇;任昌亮;张志友;杜惊雷(College of Physics,Sichuan University,Chengdu 610064,China;Key Laboratory of Photonic and Optical Detection in Civil Aviation and Atmospheric Lidar Institute,Civil Aviation Flight University of China,Guanghan 618300,China;Center for Nanofabrication and System Integration,Chongqing Institute of Green and Intelligent Technology,Chinese Academy of Sciences,Chongqing 400714,China)

机构地区：[1]College of Physics,Sichuan University,Chengdu 610064,China [2]Key Laboratory of Photonic and Optical Detection in Civil Aviation and Atmospheric Lidar Institute,Civil Aviation Flight University of China,Guanghan 618300,China [3]Center for Nanofabrication and System Integration,Chongqing Institute of Green and Intelligent Technology,Chinese Academy of Sciences,Chongqing 400714,China

出　　处：《Chinese Physics B》2021年第6期385-389,共5页中国物理B（英文版）

基　　金：supported by the National Key Research and Development Program of China (Grant No. 2017YFA0305200);the National Natural Science Foundation of China (Grant Nos. 11674234 and 11605205);the Natural Science Foundation of Chongqing (Grant Nos. cstc2015jcyjA00021 and cstc2018jcyjAX0656);the Innovation Project of Sichuan University (Grant No. 2018SCUH0021);the Youth Innovation Promotion Association Program of the Chinese Academy of Sciences (CAS)(Grant No. No. 2015317);the Entrepreneurship and Innovation Support Program for Chongqing Overseas Returnees (Grant Nos. cx2017134and cx2018040);the Fund of CAS Key Laboratory of Microscale Magnetic Resonance;the Fund of CAS Key Laboratory of Quantum Information。

摘　　要：We theoretically introduce the statistical uncertainty of photon number and phase error to discuss the precision of parameters to be measured based on weak measurements. When the photon counting scheme is used, we discuss the relative accuracy of the system in the presence of phase error by using the orthogonal and nonorthogonal pre-and postselected states, respectively. When using the measurement scheme of pointer shift, we discuss the measurement accuracy in the presence of phase error, pointer resolution, and statistical uncertainty. These results give a guide way to get the smallest relative precision and deepen our understanding about weak measurement.

关 键 词：weak measurement quantum measurement accuracy analysis 

分 类 号：O43[机械工程—光学工程]