Entanglement of two Jaynes-Cummings atoms in single-excitation space

作     者：Ya Yang Yan Liu Jing Lu Lan Zhou Ya Yang;Yan Liu;Jing Lu;Lan Zhou

作者机构：Key Laboratory of Low Dimensional Quantum Strncures and Quantum Control of Ministry of EducationDepartment of Phlysics and Synergetic Innovation Center of Quantum Effects and ApplicationsKey Laboratory for Matter Microstructure and Function of Hunan ProvinceHunan Normal UniversityChangsha 410081China Collge of Physics and Electronic EngineeringHengyang Normal UniversityHengyang 421002China 

出 版 物：《Communications in Theoretical Physics》 (理论物理通讯（英文版）)

年 卷 期：2021年第73卷第2期

页      面：52-58页

核心收录：

学科分类：07[理学] 070201[理学-理论物理] 0704[理学-天文学] 0702[理学-物理学] 

基　　金：This work was supported by the National Natural Science Foundation of China(Grants No.11935006,11975095,12075082,11947081 and 11847010) the Hunan Provincial Natural Science Foundation of China(Grant Nos.2019JJ50007) the Science Foundation of Hengyang Normal University(Grant No.17D18) the Hunan Normal University Open Foundation of the Key Laboratory of Low-Dimensional Quantum Strutures and Quantum Control of the Ministry of Education(Grants Nos.QSQC2008). 

主　　题：cavity optomechanics Jaynes-Cummings cavities single excitation entanglement dynamics 

摘      要：We study the entanglement dynamics of two atoms coupled to their own Jaynes-Cummings cavities in single-excitation space.Here,we use concurrence to measure atomic entanglement,and consider the Bell-like states to be initial states.Our analysis suggests that collapse and revival take place in entanglement dynamics.The physical mechanism behind entanglement dynamics is periodic information and energy exchange between atoms and light fields.For the initial Bell-like states,evolutionary periodicity of the atomic entanglement can only be found if the ratio of the two atom-cavity coupling strengths is a rational number.Also,whether there is a time translation between two kinds of initial Bel-like state depends on odd versus even numbers of the coupling strength ratio.