测量诱发的关联分布  

Measurement-induced correlation distribution

作　　者：席政军[1] 李永明[1] 

机构地区：[1]陕西师范大学计算机科学学院,西安710062

出　　处：《中国科学：物理学、力学、天文学》2013年第9期1074-1078,共5页Scientia Sinica Physica,Mechanica & Astronomica

基　　金：国家自然科学基金(批准号:11271237;61228305);中央高校基本科研业务费专项基金(编号:GK201302054)资助

摘　　要：量子测量诱发量子系统的扰动使得它与辅助系统以及测量装置之间的关联发生了变化.本文使用熵交换与量子失协,在间接测量模型中,讨论测量诱发的关联分布,并得到全关联和量子关联的平衡关系.最后讨论局部操作导致量子失协的变化与测量诱发的关联分布之间的关系.It is well known that the disturbance induced by measurement can cause the change of the correlations in the quantum system with the auxiliary system and the apparatus. In this paper, using entropy change and quantum discord, we first discuss measurement-induced correlation distribution and derive a tradeoff for total correlation and quantum correlation in the indirect measurement model. In this basis, the relation between the behavior of quantum correlation under local operation and the correlation distribution is established.

关 键 词：量子测量 熵交换 量子关联 熵增量 

分 类 号：O431.2[机械工程—光学工程]