2018/03/21 by Kai Xu, Xu, Kai, Xiao‐Min Hu +15
Engineering · Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #Optical Polarization and Ellipsometry #Pulsars and Gravitational Waves Research #Quantum Physics (quant-ph)
paper · pdf · doi:10.48550/arxiv.1803.07746
openalex publication_date 2018/03/21 · openalex created_date 2022/10/03 · openalex updated_date 2026/07/28
Weak measurement amplification, which is considered as a very promising scheme in precision measurement, has been applied to various small physical quantities estimation. Since many quantities can be converted to phase signal, it is thus interesting and important to consider measuring ultra-small longitudinal phase shifts by using weak measurement. Here, we propose and experimentally demonstrate a novel weak measurement amplification based ultra-small longitudinal phase estimation, which is suitable for polarization interferometry. We realize one order of magnitude amplification measurement of small phase signal directly introduced by Liquid Crystal Variable Retarder and show its robust to finite visibility of interference. Our results may find important applications in high-precision measurements, such as gravitational waves detection.