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arXiv quant-ph/0202058quant-ph
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条件熵及其与纠缠判据的关系

Conditional entropies and their relation to entanglement criteria

Karl Gerd H. Vollbrecht, Michael M. Wolf

摘要:

本文讨论有限维二体量子系统的条件Renyi熵和Tsallis熵。研究了条件熵的正性与纠缠特性之间的关系。它特别表明,任何状态具有负的条件熵相对于任何值的熵参数是可压缩的,因为它违反了减少标准。此外,我们还证明了奇维Werner态的纠缠既不能用熵判据也不能用其它谱判据来检测。

英文摘要:

We discuss conditional Renyi and Tsallis entropies for bipartite quantum systems of finite dimension. We investigate the relation between the positivity of conditional entropies and entanglement properties. It is in particular shown that any state having a negative conditional entropy with respect to any value of the entropic parameter is distillable since it violates the reduction criterion. Moreover we show that the entanglement of Werner states in odd dimensions can neither be detected by entropic criteria nor by any other spectral criterion.

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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