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
• 来源期刊: 中国物理B（英文版）
• 年，卷（期）: 2021,（6）
• 所属期刊栏目: ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS
• 页码范围: 437-442
• 页数: 6页
• 语种: 英文
• DOI: 10.1088/1674-1056/abcfa0

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 post-selected 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.