Measuring small longitudinal phase shifts via weak measurement amplification

Weak measurement amplification, which is considered as a very promising scheme in precision measurement, has been applied to various small physical quantities estimations. Since many physical quantities can be converted into phase signals, it is interesting and important to consider measuring small...

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Bibliographic Details
Published inChinese physics B Vol. 33; no. 3; pp. 30602 - 120
Main Authors Xu, Kai, Hu, Xiao-Min, Hu, Meng-Jun, Wang, Ning-Ning, Zhang, Chao, Huang, Yun-Feng, Liu, Bi-Heng, Li, Chuan-Feng, Guo, Guang-Can, Zhang, Yong-Sheng
Format Journal Article
LanguageEnglish
Published Chinese Physical Society and IOP Publishing Ltd 01.02.2024
Subjects
phase estimation
quantum optics
weak measurement
phase estimation
weak measurement
quantum optics
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ISSN1674-1056
2058-3834
DOI10.1088/1674-1056/ad1c5a

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Summary:Weak measurement amplification, which is considered as a very promising scheme in precision measurement, has been applied to various small physical quantities estimations. Since many physical quantities can be converted into phase signals, it is interesting and important to consider measuring small longitudinal phase shifts by using weak measurement. Here, we propose and experimentally demonstrate a novel weak measurement amplification-based small longitudinal phase estimation, which is suitable for polarization interferometry. We realize one order of magnitude amplification measurement of a small phase signal directly introduced by a liquid crystal variable retarder and show that it is robust to the imperfection of interference. Besides, we analyze the effect of magnification error which is never considered in the previous works, and find the constraint on the magnification. Our results may find important applications in high-precision measurements, e.g., gravitational wave detection.
ISSN:1674-1056
2058-3834
DOI:10.1088/1674-1056/ad1c5a