Multilevel atomic Ramsey interferometry for precise parameter estimations

作     者：X N Feng L F Wei 冯夏宁;韦联福

作者机构：Guangdong Provincial Key Laboratory of Quantum Metrology and Sensing&School of Physics and AstronomySun Yat-Sen University(Zhuhai Campus)Zhuhai 519082China Information Quantum Technology LaboratorySchool of Information Science and TechnologySouthwest Jiaotong UniversityChengdu 610031China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2021年第30卷第12期

页      面：321-328页

核心收录：

学科分类：07[理学] 070201[理学-理论物理] 0702[理学-物理学] 

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.11974290) 

主　　题：quantum metrology multi-path interferometers quantum measurement 

摘      要：Multi-path(or multi-mode)entanglement has been proved to be a useful resource for sub-shot-noise sensitivity of phase estimation,which has aroused much research interest in quantum metrology *** schemes of multi-path interferometers based on optical systems have been put ***,we study a multi-state interferometer with multilevel atoms by projective ***,we investigate its ultimate sensitivity described by quantum Fisher information theory and find that the Cramer-Rao bound can be *** particular,we investigate a specific scheme to improve the sensitivity of magnetometery with a three-state interferometry delivered by a single nitrogen-vacancy(NV)center of diamond with tailor *** impacts of imperfections of the atomic beam-splitter,described by the three-level quantum Fourier transform,on the sensitivity of phase estimation is also discussed.