二能级原子自发辐射过程中的Wigner-Yanase偏态信息  

Wigner-Yanase Skew Information in the Process of Spontaneous Emission between Two Atomic Levels

作　　者：刘万芳[1] 尹训昌[1] 付静[2] 李敏[3] 

机构地区：[1]安庆师范学院物理与电气工程学院,安徽安庆246011 [2]吉林建筑大学城建学院,长春130111 [3]集美大学诚毅学院,福建厦门351100

出　　处：《吉林大学学报（理学版）》2015年第3期542-546,共5页Journal of Jilin University:Science Edition

基　　金：安徽省自然科学基金(批准号:1408085QA15);福建省中青年教师教育科研基金(批准号:JB14219)

摘　　要：研究单个二能级原子自发辐射过程中原子和光场Wigner-Yanase的信息变化,并分别计算原子和辐射场的Wigner-Yanase信息.结果表明:原子和光场的Wigner-Yanase信息均依赖于平均值〈Sz〉;当原子处于基态时,光场的Wigner-Yanase信息达到最大值;原子与光场并非同步达到最大混合态.We investigated the changes of the Wigner-Yanase information in the processes of the spontaneous emission of a two-level atom system, and calculated the Wigner-Yanase information for the reduced density matrix of the atom and that for the quantum radiation respectively. Our investigations show that both of them depend on the expectation of （S;）. And the Wigner-Yanase information for the radiation field reach the maximum when the atom stays in the ground state. Additionally, the results also show that both the atom and the field will not simultaneously become the maximal mixed state.

关 键 词：二能级原子 自发辐射 DICKE模型 Wigner-Yanase偏态信息 混合态 

分 类 号：O431.2[机械工程—光学工程]