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arXiv 1608.07730cs.ITmath.ITquant-ph
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量子容量的数学复杂性

Algorithmic complexity of quantum capacity

Samad Khabbazi Oskouei, Stefano Mancini

摘要:

最近,香农发展的通信理论已经通过利用量子理论的规则扩展到量子领域。后者源于复向量空间。然而,复数(以及实数)只是理想化,在我们只能处理有理数的实践中,它们是不可用的。这一事实自然引出了一个问题,即量子通道容量的发展概念是否真正抓住了它们传输信息的能力。在这里,我们针对量子容量来回答这个问题。为此,我们求助于半可计算性的概念,以近似(有理数)描述量子态和量子信道映射。然后,我们引入算法熵(如算法量子相干信息),并推导出相关的性质。最后,我们定义了算法量子容量,并证明了它等于标准量子容量。

英文摘要:

Recently the theory of communication developed by Shannon has been extended to the quantum realm by exploiting the rules of quantum theory. This latter stems on complex vector spaces. However complex (as well as real) numbers are just idealizations and they are not available in practice where we can only deal with rational numbers. This fact naturally leads to the question of whether the developed notions of capacities for quantum channels truly catch their ability to transmit information. Here we answer this question for the quantum capacity. To this end we resort to the notion of semi-computability in order to approximately (by rational numbers) describe quantum states and quantum channel maps. Then we introduce algorithmic entropies (like algorithmic quantum coherent information) and derive relevant properties for them. Finally we define algorithmic quantum capacity and prove that it equals the standard one.

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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