三格点自旋链上单比特信息传输的精确调控  

Precise control about single-bit information transfer in the spin chain with 3 lattice points

作　　者：卢月 郭文欣 任恒峰[1] 王清亮[1] LU Yue;GUO Wenxin;REN Hengfeng;WANG Qingliang(Department of Physics,Xinzhou Teachers University,Xinzhou 034000,China)

机构地区：[1]忻州师范学院物理系,山西忻州034000

出　　处：《高师理科学刊》2024年第4期77-80,87,共5页Journal of Science of Teachers＇College and University

基　　金：山西省高等学校大学生创新创业训练计划项目(20230932,2022012);山西省高等学校教学改革创新项目(J20220953)。

摘　　要：引入解析求解的方法,研究格点数为3的自旋链上单比特量子信息的完美传输.在给自旋链施加格点间逐差变化的磁场后,求解出了该磁场对单比特信息完美传输所产生影响的精确解.得出结论:此磁场会对实现信息完美传输的时间条件产生至关重要的影响,该条件不再仅取决于自旋链系统自身的物理属性,且仍然与链上格点的数目无关;可根据传输需要,利用合理设置的磁场控制单比特信息完美传输的时间条件.The analytical solution method is introduced to study the perfect transfer of single-bit quantum information in a spin chain with a lattice number of 3.After applying a magnetic field that varies gradually between lattice points to the spin chain,an accurate solution is given for the influence of this magnetic field on the perfect transfer of singlebit information.Further analysis concludes that the magnetic field has a crucial influence on the time condition for the perfect transfer of information,which no longer only depends on the physical properties of the spin chain.And the result has nothing to do with the number of the lattice points.Thus,according to the transfer needs,the reasonably magnetic field can be used to control the time condition for the perfect transfer of single-bit information.

关 键 词：量子信息传输 单比特信息 完美传输 量子调控 

分 类 号：O431[机械工程—光学工程]