三粒子GHZ态的量子信息分离方案(英文)  

A quantum splitting scheme of three-particle GHZ-class states

作　　者：潘桂侠[1] 

机构地区：[1]安徽理工大学理学院,淮南232001

出　　处：《原子与分子物理学报》2010年第3期508-514,共7页Journal of Atomic and Molecular Physics

基　　金：安徽省高等学校优秀青年人才基金(2009SQRZ056)

摘　　要：提出一个用GHZ态作为量子信道分离类GHZ态的方案.如果发送者Alice预先知道原量子态,Alice执行两量子比特投影测量后,接收者Bob和Charlie一起合作能恢复初态.我们计算了这个方案成功的几率和消耗的经典信息.一般地,Alice能成功地分离量子态的几率是1/4和消耗的经典信息是3/4经典比特.然而,在五种特殊情形下,消耗一些多余经典信息后,成功的几率能达到1/2甚至1.A scheme is presented for splitting three-particle GHZ-class states by using two GHZ states as the quantum channel. We show that if the sender Alice knows the initial state in prior, she only needs to implement a two-qubit projective measurement for her two receivers Bob and Charlie to recover the original state via their mutual assistance. In the scheme, the success probability and classical communication cost is calculated. In general case, Alice can successfully split the state with probability 1/4 and the classical communication cost is 3/4 classical bit. However, in situations of five special states, the success probability of our scheme can be increased to 1/2 or even to 1 after consuming some extra classical bits.

关 键 词：量子信息分离 经典信息 GHZ态 

分 类 号：O431.2[机械工程—光学工程]