基于双模压缩信道的双模高斯态量子隐形传态  

Teleportation of a two-mode Gaussian state through double two-mode-squeezed-state quantum channels

作　　者：张茜[1] 李福利[1] 李宏荣[1] 

机构地区：[1]西安交通大学应用物理系

出　　处：《物理学报》2006年第5期2275-2280,共6页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10274058和10574103)资助的课题~~

摘　　要：研究了双模高斯态的两个模经由两个双模压缩量子信道的隐形传态.结果表明,当输入态有纠缠时,若要输出态的纠缠不为零,量子信道的纠缠必须大于一确定值,其大小在输入态为纯态时依赖于输入态的纠缠度;在输入态为混合态时不仅与输入态的纠缠有关,还依赖于输入态的整体纯度.Teleportation of a general two-mode Gaussian state through double two-mode squeezed state quantum channels is studied. It is found that the quantum channels must be enough entangled for the output state to be inseparable. The required minimum entanglement for the quantum channels to maintain entanglement in the output state depends on the entanglement of the input state when the input state is pure. The minimum entanglement depends not only the on entanglement but also on the global purity of the input state when the input state is mixed.

关 键 词：量子隐形传态 量子纠缠 双模高斯态 

分 类 号：O413[理学—理论物理]