Entropy　and　Entanglement　of　the　Electromagnetically　Induced　Transparency　System

作     者：LIUXiao-Juan FANGMao-Fa ZHOUQing-Ping 

作者机构：DepartmentofPhysicsHumanNormalUniversityChangsha410081 AnhuiInstituteofOpticsandFineMechanicsChineseAcademyofSciencesHefei230031 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2004年第21卷第6期

页      面：1071-1074页

核心收录：

学科分类：07[理学] 070203[理学-原子与分子物理] 0702[理学-物理学] 

基　　金：国家自然科学基金 湖南省自然科学基金 湖南省教育厅项目 

主　　题：Quantum entanglement 

摘      要：We study the entropy and the entanglement of an electromagnetically induced transparency system. The quantum entanglement between the atom and the two quantized laser fields is discussed by using quantum reduced entropy and that between the two quantized laser fields by using quantum relative entropy. We also examine whether influences of EIT on entropy and quantum entanglement of the system considered occur or not. Our results show that the minimum value of the atomic reduced entropy may be regarded as an entropy criterion on the electromagnetically induced transparency occurring.