Completely positive mappings and mean matrices

Completely positive mappings and mean matrices
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完全正映射和均值矩阵

DOI:
10.1016/j.laa.2011.01.043
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发表时间:
2010
影响因子:
1.1
通讯作者:
D. Petz
D. Petz
中科院分区:
数学3区
文献类型:
--
作者:
Ádám Besenyei;D. Petz

文献摘要

被引文献

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某些函数f:R+→ R+诱导正数的平均,矩阵的单调性给出了正定矩阵平均的可能性。此外,这样的函数f可以定义矩阵上的线性映射J D f-1:M n→ M n(这是构造单调度量的基础)。本文的主要目的是在几个具体函数f的情况下,检验JDf-1的完全正性。这个问题的动机是量子信息中的应用。
Some functions f: R+→ R+ induce mean of positive numbers and the matrix monotonicity gives a possibility for means of positive definite matrices. Moreover, such a function f can define a linear mapping J D f-1: M n→ M n on matrices (which is basic in the constructions of monotone metrics). The present subject is to check the complete positivity of J D f-1 in the case of a few concrete functions f. This problem has been motivated by applications in quantum information.