C^3■C^4无偏的不可扩展最大纠缠基

Mutually Unbiased and Unextendible Maximally Entangled Bases inC^3■C^4

测量基是量子信息研究的一个重要内容.首先构造两体量子系统C^3■C^4一组不可扩展最大纠缠基,其次,通过改变C 4的标准正交基,得到C^3■C^4的两组无偏的不可扩展的最大纠缠基.并将其进行完备化,从而充实和丰富最佳测量基理论.

Measurement base is an important part of quantum information theory.Firstly,unextendible maximally entangled bases are constructed in two-body quantum system C^3■C^4.Then,by changing the standard orthogonal bases in C 4,two unbiased and unextendible maximally bases can be obtained in two-body quantum system C^3■C^4.After that,the constructed bases are completed as a group of orthogonal bases in C^3■C^4.This study enriches the best measurement base theory.