任意态量子信息在自旋链上的传输  

Quantum information transfer of multiple states in spin chain

作　　者：任恒峰[1] 王清亮[1] 侯胜侠[2] 连润明[1] 杨瑞[1] 

机构地区：[1]忻州师范学院物理系,山西忻州034000 [2]河北理工大学轻工学院,河北唐山063000

出　　处：《量子电子学报》2012年第5期572-576,共5页Chinese Journal of Quantum Electronics

基　　金：山西省青年科技研究基金(2010021003-5);忻州师范院级基金(200901)资助项目

摘　　要：量子信息传输是量子信息的一个重要分支。以自旋链上单态量子信息的传输为基础,详细讨论了两态和三态信息在自旋链上的传输,并进一步推广至任意态的情形。最终得出在自旋链上两态、三态乃至任意多态的量子信息传输的概率公式,以及自旋链完备传输任意态信息的条件。从而为任意多态量子信息的完备传输提供了一套切实可行的理论方案。Quantum information transfer is one of the important branches in quantum infromation. Based on the single state quantum information transfer in spin chain, the transfer of two and three states information in spin chain are discussed in detail, and then the scheme is expanded to the arbitrary n states furthermore Finally, the probability formula of the quantum information of the arbitrary n-state transfers in spin chain is obtained, and the condition that the arbitrary n-state information can be transferred perfectly in spin chain is given as well. Accordingly, a reasonable theoretical scheme is offered for the perfect transfer of the arbitrary n-state information.

关 键 词：量子信息 完备传输 自由演化 自旋链 

分 类 号：O431.2[机械工程—光学工程]