Subadditivity of the minimum output entropy and superactivation of the classical capacity of quantum multiple access channels

Subadditivity of the minimum output entropy and superactivation of the classical capacity of quantum multiple access channels
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量子多址信道最小输出熵的次可加性与经典容量的超激活

DOI:
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发表时间:
2010
期刊:
影响因子:
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通讯作者:
L. Czekaj
L. Czekaj
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作者:
L. Czekaj

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研究了量子多址信道(MAC)的最小输出熵(H{sub min})的次可加性.我们提供了一个例子,违反了在经典信息论中已知的H{sub min}的可加性定理。我们的结果是基于MAC的一个基本性质,即,每个发送者的独立性。示例中使用的通道可以显式构造。在H{sub min}的次可加性的基础上,我们还给出了MAC经典容量域的极值超可加性(超激活)的一个例子。
We study subadditivity of the minimum output entropy (H{sub min}) of quantum multiple access channels (MACs). We provide an example of violation of the additivity theorem for H{sub min} known in classical information theory. Our result is based on a fundamental property of MACs, i.e., independence of each sender. The channels used in the example can be constructed explicitly. On the basis of subadditivity of H{sub min} we also provide an example of extremal superadditivity (superactivation) of the classical capacity region of MACs.
DOI: 10.1142/s1230161210000047
发表时间: 2009-07
期刊: Open Syst. Inf. Dyn.
影响因子: --
作者:
F. Brandão;M. Horodecki
通讯作者: F. Brandão;M. Horodecki