Discontinuity of the Measurement-Induced Nonlocality Evolution  

作　　者：XU Guo-Fu TONG Dian-Min 许国富;仝殿民(Department of Physics,Shandong University,Jinan 250100)

机构地区：[1]Department of Physics,Shandong University,Jinan 250100

出　　处：《Chinese Physics Letters》2012年第7期6-9,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant No 11175105;the Natural Science Foundation of Shandong Province under Grant No No ZR2010AM009;the National Basic Research Program of China under Grant No 2009CB929400.

摘　　要：A novel resource,i.e.measurement-induced nonlocality,was proposed by Luo and Fu [Phys.Rev.Lett.106(2011)120401].It can directly reflect the usefulness of quantum nonlocality in quantum protocols.We investigate the dynamics of measurement-induced nonlocality by exactly solving a model which consists of two independent atoms each subject to a zero-temperature muti-mode cavity.We find that the dynamics of measurement-induced nonlocality is discontinuity under some special conditions.The reason for this phenomenon is the constraint of the von Neumann measurements which do not disturb the reduced density operator.We also find the sudden death phenomenon and the sudden birth phenomenon.

关 键 词：CONDITIONS QUANTUM CONSTRAINT 

分 类 号：O41[理学—理论物理]