单模腔场与Ξ型三能级原子相互作用熵的纠缠演化  

Atom entropy evolution of the interaction between aΞ-type three-level atom and a single-mode cavity field

作　　者：张蕾[1] 郝丹辉[1] 强稳朝[2] ZHANG Lei;HAO Dan-Hui;QIANG Wen-Chao(Huaqing College, Xi’an University of Architecture and Technology, Xi’an 710043, China;Faculty of Science, Xi’an University of Architecture and Technology, Xi’an 710055, China)

机构地区：[1]西安建筑科技大学华清学院,西安710043 [2]西安建筑科技大学理学院,西安710055

出　　处：《原子与分子物理学报》2020年第3期420-424,共5页Journal of Atomic and Molecular Physics

基　　金：陕西省教育厅科研项目(18JK025)。

摘　　要：文章运用量子熵理论,研究了一个三能级原子与一个单模腔场发生非共振相互作用时系统原子熵的演化特性,讨论了原子初始状态以及失谐量大小对原子熵演化的影响.结果表明:原子的初始状态影响系统原子熵的震荡特性,当θ取合适值时可以获得稳定的、周期性震荡的量子纠缠态;失谐量对系统熵的崩塌~回复现象有影响,当δ取合适值时崩塌~回复现象近乎消失.This paper studies the evolution properties of atom entropy by means of nonresonant interaction between aΞ-type three-level atom and a single-mode field by using the quantum entropy theory.The influences of the initial state of atom and the frequency detuningδon the atom entropy are discussed.The results indicate that the initial state of atom affects the oscillation properties of atom entropy evolution.The stable,periodically oscillating entangled state can be obtained when the parameterθare appropriate;The frequency detuningδaffects collapse-recovery phenomenon of atom entropy evolution and collapse-recovery phenomenon of atom entropy evolution almost disappears by choosing proper detuningδ.

关 键 词：单模真空腔场 密度矩阵 熵 

分 类 号：O56[理学—原子与分子物理]