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arXiv quant-ph/0511260quant-ph
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关于相对熵的所有不等式

All Inequalities for the Relative Entropy

Ben Ibinson, Noah Linden, Andreas Winter

摘要:

两个n方量子态的相对熵是一个重要的量,例如,表现出两个态不同的程度。通过将两个n方减少到更小数目的$m$方而形成的状态的相对熵总是小于或等于两个原始n方状态的相对熵。这就是相对熵的单调性。利用凸几何的技巧,我们证明了限制下的单调性是相对熵满足的唯一一般不等式。在这样做的时候,我们与一般的访问结构的秘密共享计划。一个令人惊讶的结果是,多方状态子集的允许相对熵值的结构比允许熵值的结构简单得多。而允许的相对熵值的结构(不同于熵的结构)对于经典概率分布和量子态是相同的。

英文摘要:

The relative entropy of two n-party quantum states is an important quantity exhibiting, for example, the extent to which the two states are different. The relative entropy of the states formed by reducing two n-party to a smaller number $m$ of parties is always less than or equal to the relative entropy of the two original n-party states. This is the monotonicity of relative entropy. Using techniques from convex geometry, we prove that monotonicity under restrictions is the only general inequality satisfied by relative entropies. In doing so we make a connection to secret sharing schemes with general access structures. A suprising outcome is that the structure of allowed relative entropy values of subsets of multiparty states is much simpler than the structure of allowed entropy values. And the structure of allowed relative entropy values (unlike that of entropies) is the same for classical probability distributions and quantum states.

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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