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arXiv 1105.2656math-phmath.MPquant-ph
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量子相对熵- II的连续性界

Continuity bounds on the quantum relative entropy - II

Koenraad M. R. Audenaert, Jens Eisert

摘要:

量子相对熵经常被用作两个量子态之间的距离度量,并且将其与其他距离度量相关联的不等式在量子信息理论的许多领域中是重要的数学工具。我们在以前的工作中已经推导出许多这样的不等式(K.M.R. Audenaert和J.J.J.M.P.,J.Math.Phys.46,102104(2005))。本文是一个后续行动,并提供了尖锐的上界的相对熵的迹范数距离和最小的特征值的两个国家有关。所得结果比我们以前工作中的相应结果更一般,并纠正了其证明中的一个错误。作为一个副产品,我们得到了一个尖锐的上界正则化相对熵介绍Lendi,Farhadmotamed和van Wonderen。

英文摘要:

The quantum relative entropy is frequently used as a distance measure between two quantum states, and inequalities relating it to other distance measures are important mathematical tools in many areas of quantum information theory. We have derived many such inequalities in our previous work (K.M.R. Audenaert and J. Eisert, J. Math. Phys. 46, 102104 (2005)). The present paper is a follow-up on this, and provides sharp upper bounds on the relative entropy in terms of the trace norm distance and of the smallest eigenvalues of both states concerned. The results obtained here are more general than the corresponding one from our previous work, and also corrects a mistake in one of its proofs. As a by-product, we obtain a sharp upper bound on the regularised relative entropy introduced by Lendi, Farhadmotamed and van Wonderen.

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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