Optimal initial states for quantum parameter estimation based on Jaynes–Cummings model[Invited]  

作　　者：乔莉文 彭家鑫 朱百强 张卫平 张可烨 Liwen Qiao;Jia-Xin Peng;Baiqiang Zhu;Weiping Zhang;Keye Zhang(Quantum Institute for Light and Atoms,State Key Laboratory of Precision Spectroscopy,Department of Physics,School of Physics and Electronic Science,East China Normal University,Shanghai 200062,China;Shanghai Branch,Hefei National Laboratory,Shanghai 201315,China;School of Physics and Astronomy,and Tsung-Dao Lee Institute,Shanghai Jiao Tong University,Shanghai 200240,China;Shanghai Research Center for Quantum Sciences,Shanghai 201315,China;Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,China)

机构地区：[1]Quantum Institute for Light and Atoms,State Key Laboratory of Precision Spectroscopy,Department of Physics,School of Physics and Electronic Science,East China Normal University,Shanghai 200062,China [2]Shanghai Branch,Hefei National Laboratory,Shanghai 201315,China [3]School of Physics and Astronomy,and Tsung-Dao Lee Institute,Shanghai Jiao Tong University,Shanghai 200240,China [4]Shanghai Research Center for Quantum Sciences,Shanghai 201315,China [5]Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,China

出　　处：《Chinese Optics Letters》2023年第10期106-113,共8页中国光学快报（英文版）

基　　金：supported by the Innovation Program for Quantum Science and Technology(No.2021ZD0303200);the National Key Research and Development Program of China(No.2016YFA0302001);the National Natural Science Foundation of China(Nos.11974116,12234014,and 11654005);the Shanghai Municipal Science and Technology Major Project(No.2019SHZDZX01);the Fundamental Research Funds for the Central Universities;the Chinese National Youth Talent Support Program;and the Shanghai Talent Program.

摘　　要：Quantum parameter estimation is a crucial tool for inferring unknown parameters in physical models from experimental data.The Jaynes–Cummings model is a widely used model in quantum optics that describes the interaction between an atom and a single-mode quantum optical field.In this Letter,we systematically investigate the problem of estimating the atom-light coupling strength in this model and optimize the initial state in the full Hilbert space.We compare the precision limits achievable for different optical field quantum states,including coherent states,amplitude-and phase-squeezed states,and provide experimental suggestions with an easily prepared substitute for the optimal state.Our results provide valuable insights into optimizing quantum parameter estimation in the Jaynes–Cummings model and can have practical implications for quantum metrology with hybrid quantum systems.

关 键 词：quantum Fisher information Jaynes-Cummings model parameter estimation theory 

分 类 号：O431.2[机械工程—光学工程]