Enhancement of angular displacement measurement sensitivity by modified-SU(2) interferometry

Karunesh Kumar Mishra; Priyanka Sharma; Devendra Kumar Mishra

doi:10.1117/12.2669992

11 May 2023 Enhancement of angular displacement measurement sensitivity by modified-SU(2) interferometry

Karunesh Kumar Mishra, Priyanka Sharma, Devendra Kumar Mishra

Proceedings Volume 12638, Women in Optics and Photonics in India 2022; 126380L (2023) https://doi.org/10.1117/12.2669992
Event: Women in Optics and Photonics in India, 2022, Bangalore, India

Conference Poster

Abstract

In this paper, we investigate the angular displacement measurements using the homodyne detection method in a modified-SU(2) Mach-Zehnder interferometer (MZI). Three parametric amplifiers (PAs) are used. PA’s role is to increase the number of photons and to reduce the shot-noise. We also consider quantum Fisher information (QFI) and derive expressions for single- and twoparameter cases and corresponding quantum Cramer-Rao bounds (QCRB). We find that angular displacement sensitivity exceeds the standard quantum limit (SQL) or shot-noise limit (SNL) and approaches single- and two-parameter QCRB. Finally, we investigate the impact of photon losses on the sensitivity of interferometer

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Karunesh Kumar Mishra, Priyanka Sharma, and Devendra Kumar Mishra "Enhancement of angular displacement measurement sensitivity by modified-SU(2) interferometry", Proc. SPIE 12638, Women in Optics and Photonics in India 2022, 126380L (11 May 2023); https://doi.org/10.1117/12.2669992

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