Rabi和Ramsey原子光谱最优测量点的选取  

Selection of Optimal Measurement Points for Rabi and Ramsey Atomic Spectra

作　　者：吴嘉瑜 张秀荣 李卫东 WU Jiayu;ZHANG Xiurong;LI Weidong(Institute of Theoretical Physics,Shanxi University,Taiyuan 030006,China;School of Physics and Electronic Engineering,Shanxi University,Taiyuan 030006,China;Shenzhen Key Laboratory of Ultraintense Laser and Advanced Material Technology,Center for Advanced Material Diagnostic Technology,and College of Engineering Physics,Shenzhen Technology University,Shenzhen 518118,China;Guangdong Provincial Key Laboratory of Quantum Science and Engineering,Southern University of Science and Technology,Shenzhen 518055,China)

机构地区：[1]山西大学理论物理研究所,山西太原030006 [2]山西大学物理电子工程学院,山西太原030006 [3]深圳技术大学工程物理学院,先进材料诊断技术中心,超强激光与先进材料技术深圳重点实验室,广东深圳518118 [4]广东省量子科学技术与工程重点实验室(南方科技大学),广东深圳518055

出　　处：《山西大学学报（自然科学版）》2023年第3期636-641,共6页Journal of Shanxi University(Natural Science Edition)

基　　金：国家自然科学基金(11874247);中国国家重点研究开发计划(2017YFA0304500);广东省重点实验室(2019B121203002);中国量子光学与量子光学器件国家重点实验室计划(KF201703)。

摘　　要：利用量子Fisher信息,对二能级原子的Rabi光谱和Ramsey光谱,在量子投影测量下的最优测量条件进行了研究。结果表明,Rabi光谱的量子Fisher信息与Rabi频率2b密切相关,当光和原子作用时间越接近π/(2b),量子Fisher信息值越大,并且可依据量子Fisher信息值确定实验中所需的最佳测量位置。在相同Rabi频率的条件下,Ramsey光谱的量子Fisher信息大于Rabi光谱;且间歇时间越长,Ramsey光谱共振峰半高宽处的量子Fisher信息值越大,其失谐量可作为最佳测量位置。With the quantum Fisher information,the optimal measurement conditions of Rabi spectrum and Ramsey spectrum of twolevel atom system under quantum projection measurement are studied.The results show that the quantum Fisher information of Rabi spectrum is closely related to Rabi frequency 2b.When the interaction time between light and atoms is closer toπ/(2b),the quantum Fisher information is larger,and the detuning value position required in the experiment can be determined according to the quantum Fisher information.At the same Rabi frequency,the quantum Fisher information of Ramsey spectrum is larger than that of Rabi spectrum.The longer interval time,the larger quantum Fisher information at the half height width of the resonance peak of Ramsey spectrum,and its detuning can be used as the best measurement position.

关 键 词：原子钟 Rabi谱 Ramsey谱 量子Fisher信息 

分 类 号：O436[机械工程—光学工程]