含三体相互作用海森堡链的几何量子失谐  

Geometric quantum discords in the Heisenberg chain with three-site interaction

作　　者：谢玉霞[1] 刘晶[1] 

机构地区：[1]西安邮电大学理学院,陕西西安710121

出　　处：《西安邮电大学学报》2016年第4期83-87,共5页Journal of Xi’an University of Posts and Telecommunications

基　　金：陕西省自然科学基础研究计划资助项目(2014JM1008)

摘　　要：研究含三体相互作用和外加匀强磁场时海森堡XX自旋链的几何量子失谐特性,结果发现:对有限温度下的热平衡态,ZZZ型三体相互作用可用来有效增强系统边界量子比特之间的Bures距离量子失谐和Hellinger距离量子失谐,却不能用来增强对应的迹距离量子失谐;不同度量方式的几何量子失谐会给出不同的量子态态序。Properties of various geometric quantum discords in the Heisenberg XX spin chain with three-site interactions and external magnetic fields is investigated. The results show that for thermal states of the system at finite temperature, the ZZZ type three-site interaction can be used to enhance evidently the Bures distance discord and the Hellinger distance discord, while the trace distance discord can only be decreased. Moreover, different measures of geometric quantum discords can impose different orderings of quantum states.

关 键 词：几何量子失谐 海森堡链 三体相互作用 

分 类 号：TN918[电子电信—通信与信息系统] O431[电子电信—信息与通信工程]