七位量子信道编码与纠错  

Seven quantum channel coding and error correction

作　　者：陈玺[1] 周小清[1] 赵晗[1] 张沛[1] 

机构地区：[1]吉首大学物理与机电工程学院,湖南吉首416000

出　　处：《量子电子学报》2013年第6期722-730,共9页Chinese Journal of Quantum Electronics

基　　金：湖南省自然科学基金(11JJ3003;13JJ3092);湖南省科技计划(2010FJ3081)资助项目

摘　　要：在量子网络的两个站点间通信时,一旦数据帧中出现误码就需要重新发送数据帧,此举虽然能够保证数据的正确性,但是在一定程度上增加了信道的压力、降低了通信效率。为了缓解信道压力,从量子态的复制、隐形传送的过程出发,针对现有的量子纠错电路进行分析和改进,设计出了七粒子纠缠态的量子纠错线路,七粒子纠缠态量子纠错可以纠正不多于3位量子态出现的位反转或者位相翻转错误。并对改进前后协议的效率、信道的利用率进行对比,发现改进后的纠错电路能有效提高数据传输的效率,为以后多粒子纠错提供可参考的依据。While the communication between two sites in the quantum network is carried out, the data frames should be resent once the bit-reversed errors appear. Although this method can guarantee the accuracy of data, the pressure of channel is increased and the communication efficiency is reduced. In order to relieve the pressure of channel, the present quantum bit-reversed error correction circuits were analyzed and improved based on the replication of entanglement and the teleportation to design the seven-particle entanglement of quantum bit-reversed error correction circuits. This improvement can not correct more than three bit-reversed quantum states or phase flip error. The efficiency of protocol and utilization of channels before and after the improvement were compared, and the results show that the latter has higher data transmission utilization and it can supply reference evidence for multi-particle error correction.

关 键 词：量子通信 七粒子纠缠态 纠错 保真度 

分 类 号：O431.2[机械工程—光学工程]