文献类型：期刊文献

英文题名：Sensitivity of Rydberg microwave electrometry limited by laser frequency noise

作者：Yang, Bowen[1,2,3,4];Yan, Yuhan[1,2,3,5];Li, Xuejie[1,2,3,5];Zhao, Haojie[1,2,3,4];Xiao, Ling[1,2,3];Li, Xiaolin[6];Deng, Jianliao[1,2,3];Cheng, Huadong[1,2,3,4]

机构：[1]Chinese Acad Sci, Key Lab Quantum Opt, Shanghai 201800, Peoples R China;[2]Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Ctr Cold Atom Phys, Shanghai 201800, Peoples R China;[3]Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Wangzhijiang Innovat Ctr Laser, Aerosp Laser Technol & Syst Dept, Shanghai 201800, Peoples R China;[4]Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China;[5]East China Normal Univ, Dept Phys & Elect Sci, Shanghai 200062, Peoples R China;[6]East China Univ Sci & Technol, Sch Phys, Shanghai 200237, Peoples R China

年份：2024

卷号：109

期号：3

外文期刊名：PHYSICAL REVIEW A

收录：;EI(收录号：20241115748523);WOS:【SCI-EXPANDED(收录号:WOS:001198653400010)】；

基金：This study was financially supported by the National Nat- ural Science Foundation of China (Grants No. 12174409 and No. 61835013) .

语种：英文

外文关键词：Atoms - Diffusion - Phase noise - Quantum optics

摘要：Laser frequency or phase noise is a main factor that limits the sensitivity of Rydberg microwave (MW) electrometry. In this study, we proposed a theoretical approach to estimate the effect of laser frequency noise on the atomic coherence of Rydberg sensors based on an atomic superheterodyne receiver. The noisy lasers were characterized using a phase-diffusion model. In particular, explicit formulas were derived to evaluate the noise-limited sensitivity for a given laser linewidth. Furthermore, the effect of Doppler broadening on the sensitivity of the Rydberg sensor at different atomic temperatures was estimated. Our theoretical results provide guidance for the development of Rydberg MW sensors and the method discussed herein can be applied to many other quantum systems.