Based on the fact that the set of all separable states is a convex-closed set,it is proved that the infimum in the definition of the generalized robustness of entanglement( GRo E) can be attained; second,it is illustrated that a convex combination of tw o generalized optimal states of a state is still a generalized optimal state and the GRo E is a lower semicontinuous function on the set of all quantum states of a mult-partite system; lastly,necessary and sufficient conditions for a quantum channel to decre...
【基金】
国家自然科学基金资助项目(11371012,11401359,11471200)
【更新日期】
2016-12-09
【分类号】
O413
【正文快照】
网络出版地址:http://www.cnki.net/kcms/detail/37.1389.N.20160912.1056.004.htmlWANG Xiao-xia,CAO Huai-xin*,ZHA Liao(School of Mathematics and Information Science,Shaanxi Normal University,Xian 710062,Shaanxi,China)0引言在量子信息传递的过程中,量子系统不可?