两体量子的局域删除与纠缠态的提取  

Local Deleting and Distillability of Entanglement on Bipartite Quantum States

作　　者：袁庆生[1] 任林源[1] 

机构地区：[1]西安工业大学理学院,西安710021

出　　处：《西安工业大学学报》2013年第7期530-532,共3页Journal of Xi’an Technological University

基　　金：陕西省教育厅科研计划项目(09JK494);西安工业大学校长科研基金项目(XAGDXJJ0930)

摘　　要：尽管在全局操作下,正交量子态可以精确删除,但是在局域操作下,即使是正交的量子态也不一定可精确删除.本文首先考虑了在局域操作下,两体正交最大纠缠态和量子信道的局域删除问题,得到了它们可以实现局域删除的充要条件,其次研究了量子纠缠问题,得到一个从有限量子拷贝纠缠提取的必要条件.The orthogonal quantum states can be deleted perfectly under the condition of global operation,but when the operation is restricted to the local operation and classical communication,even the orthogonal quantum states may not be deleted perfectly.The paper first discusses the deleting of bipartite orthogonal maximal entanglement states and deleting of quantum channel with the necessary and sufficient conditions for deleting by LOCC obtained.Then the distillation of entanglement is discussed and a necessary condition for distillability from finite copies is obtained.

关 键 词：非局域性 局域删除 纠缠提取 正交量子态 

分 类 号：O431.2[机械工程—光学工程]