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arXiv quant-ph/0404126quant-phmath-phmath.MPmath.RA
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Tr A^p K^* B^(1-p)K的Lieb证明及有关不等式的注记

Lieb's simple proof of concavity of Tr A^p K^* B^(1-p) K and remarks on related inequalities

Mary Beth Ruskai

摘要:

给出了映射(A,B)--> Tr(A^pK ^* B^(1-p)K)的可解性的一个简单、完备的证明.作者没有声称原创性;这说明了利布的原始论点在其最简单的,而不是其最一般的形式。然后给出了从这个结果到A -> Tr e^[K + log(A)]的推论链的草图。给出了在熵不等式中起关键作用的映射(A,B,X)--> Tr \int X^*(A+ uI)^{-1} X(B+ uI)^{-1} du的联合凸性的一个独立的初等证明.

英文摘要:

A simple, self-contained proof is presented for the concavity of the map (A,B) --> Tr(A^p K^* B^(1-p) K). The author makes no claim to originality; this note gives Lieb's original argument in its simplest, rather than its most general, form. A sketch of the chain of implications from this result to concavity of A --> Tr e^[K + log(A)] is then presented. An independent elementary proof is given for the joint convexity of the map (A,B,X) --> Tr \int X^* (A+ uI)^{-1} X (B+ uI)^{-1} du which plays a key role in entropy inequalities.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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