关于矩阵数字特征的一些注记  

Some Notes on the Numerical Characteristics of Matrix

作　　者：禹鸥洋 任芳国[1] 

机构地区：[1]陕西师范大学数学与统计学院,陕西 西安

出　　处：《理论数学》2024年第2期482-491,共10页Pure Mathematics

摘　　要：根据矩阵数字特征的定义,结合矩阵Lie积的定义,利用矩阵迹的性质,矩阵数字特征的性质,以及密度矩阵的性质,对由Hermite矩阵组成的实线性空间Hn上的一些数字特征进行了数值计算并且给出了一个例子,其次对WY相关系数进行改造使其成为矩阵空间上的半内积并且利用矩阵范数、矩阵迹及矩阵数字特征的性质得出了改造后的WY相关系数与原WY相关系数、斜信息以及协方差的关系,获得了原WY相关系数和斜信息的一些性质,并给出改造后的WY相关系数的一个应用。这些结果将在量子信息论中具有一定的应用。According to the definition of matrix numerical characteristics, combined with the definitions of Lie product of matrix, using the properties of matrix traces, matrix numerical characteristics, and density matrix, numerical calculations were performed on some numerical characteristics on real linear space Hn composed of Hermite matrices, and an example was given, secondly, the WY corre-lation coefficient was modified to become a semi inner product in the matrix space, and the rela-tionship between the modified WY correlation coefficient and the original WY correlation coefficient and skew information, as well as some properties of covariance, the original WY correlation coefficient and skew information, were obtained using the properties of matrix norm, matrix trace, and matrix numerical characteristics, and an application of the modified WY correlation coefficient was also presented. These results will have certain applications in quantum information theory.

关 键 词：密度矩阵 矩阵期望 矩阵方差 矩阵协方差 WY相关系数 矩阵斜信息 

分 类 号：O15[理学—数学]