Entanglement charge of thermal states  

作　　者：YE MingYong LIN XiuMin BAI YanKui WANG ZiDan 

机构地区：[1]School of Physics and Optoelectronics Technology,Fujian Normal University,Fuzhou 350007,China [2]College of Physical Science and Information Engineering and Hebei Advance Thin Films Laboratory,Hebei Normal University,Shijiazhuang 050016,China [3]Department of Physics and Center of Theoretical and Computational Physics,University of Hong Kong,Hong Kong,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2012年第4期666-670,共5页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 60878059,11004033 and 10905016);the Natural Science Foundation of Fujian Province (Grant No. 2010J01002);the Fundof Hebei Normal University,the RGC Grant of Hong Kong (Grant Nos.HKU7044/08P and HKU7058/11P);the State Key Program for Basic Research of China (Grant No. 2011CB922104);the National Fundamental Research Program of China (Grant No. 2011CBA00203)

摘　　要：Entanglement charge is an operational measure to quantify nonlocalities in ensembles consisting of bipartite quantum states.Here we generalize this nonlocality measure to single bipartite quantum states.As an example,we analyze the entanglement charges of some thermal states of two-qubit systems and show how they depend on the temperature and the system parameters in an analytical way.Entanglement charge is an operational measure to quantify nonlocalities in ensembles consisting of bipartite quantum states. Here we generalize this nonlocality measure to single bipartite quantum states. As an example, we analyze the entanglement charges of some thermal states of two-qubit systems and show how they depend on the temperature and the system parameters in an analytical way,

关 键 词：entanglement charge quantum entanglement thermal state 

分 类 号：O413[理学—理论物理] TK229.66[理学—物理]