用Cluster态实现任意两粒子态的远程态制备方案

量子电子学报 , 2012, 29(5): 566-571. doi: 10.3969/j.issn.1007-5461.2012.05.009

用Cluster态实现任意两粒子态的远程态制备方案

1.安徽理工大学理学院,安徽淮南,232001

2.核工业理化工程研究院,天津,300180

3.安徽矿业职业技术学院机械工程系,安徽淮北,235000

4.安徽理工大学理学院,安徽淮南,232001

基金项目: Master,Doctorate Fund of Anhui University of Science and Technology under Grant(200911176) Supported by the Talent Foundation of High Education of Anhui Province for Outstanding Youth under Grant(2009SQRZ056) Young Teachers Fund of Anhui University of Science and Technology under Grant(2012QNZ13)

关键词：远态制备 , 四量子比特Cluster态 , 两量子比特投影测量 , 经典通讯 , 幺正操作

Remote preparation of two-qubit state using four-qubit cluster state

Keywords： remote state preparation , four-qubit cluster state , two-qubit projective measurement , classical communication , unitary operation

提出一个用Cluster态作为量子信道远态制备两量子态的方案,并计算了此方案成功的概率和消耗的经典信息.一般地,Bob能成功地制备初态的概率是1/4,消耗的经典信息是1/4经典比特.然而,在六种特殊情形下,消耗一些多余经典信息后,成功的概率能达到1/2甚至1.

A scheme is proposed for remotely preparing a two-qubit state by using four-qubit cluster state as the quantum channel.In the scheme,the success probability of preparation and classical communication cost are calculated.In general,Bob can.successfully prepare the target state with the probability 1/4 and consume only 1/4 bits classical communication.However,if the state belongs to six special situations,the success probability of preparation can reach 1/2 or even 1 after consuming some extra bits.

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