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arXiv 1601.06370quant-phcs.ITmath.IT
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量子信道与统计实验的比较

Comparison of quantum channels and statistical experiments

Anna Jencova

摘要:

对于一对具有相同输入空间的量子信道,我们表明,一个信道的近似的可能性,通过后处理的其他信道可以通过比较的成功概率为两个系综作为输出得到的任何系综的输入空间上耦合的辅助。这提供了一个操作解释的自然延伸勒卡姆的不足量子信道。特别是,我们得到了一个版本的量子统计实验的随机化准则。证明是基于钻石模及其对偶的一些性质,这是独立的利益。

英文摘要:

For a pair of quantum channels with the same input space, we show that the possibility of approximation of one channel by post-processings of the other channel can be characterized by comparing the success probabilities for the two ensembles obtained as outputs for any ensemble on the input space coupled with an ancilla. This provides an operational interpretation to a natural extension of Le Cam's deficiency to quantum channels. In particular, we obtain a version of the randomization criterion for quantum statistical experiments. The proofs are based on some properties of the diamond norm and its dual, which are of independent interest.

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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