原子与分子物理学报
原子與分子物理學報
원자여분자물이학보
CHINESE JOURNAL OF ATOMIC AND MOLECULAR PHYSICS
2010年
3期
508-514
,共7页
量子信息分离%经典信息%GHZ态
量子信息分離%經典信息%GHZ態
양자신식분리%경전신식%GHZ태
quantum information splitting%classical communication%GHZ state
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.
提齣一箇用GHZ態作為量子信道分離類GHZ態的方案.如果髮送者Alice預先知道原量子態,Alice執行兩量子比特投影測量後,接收者Bob和Charlie一起閤作能恢複初態.我們計算瞭這箇方案成功的幾率和消耗的經典信息.一般地,Alice能成功地分離量子態的幾率是1/4和消耗的經典信息是3/4經典比特.然而,在五種特殊情形下,消耗一些多餘經典信息後,成功的幾率能達到1/2甚至1.
제출일개용GHZ태작위양자신도분리류GHZ태적방안.여과발송자Alice예선지도원양자태,Alice집행량양자비특투영측량후,접수자Bob화Charlie일기합작능회복초태.아문계산료저개방안성공적궤솔화소모적경전신식.일반지,Alice능성공지분리양자태적궤솔시1/4화소모적경전신식시3/4경전비특.연이,재오충특수정형하,소모일사다여경전신식후,성공적궤솔능체도1/2심지1.
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.
