Asymptotically Well-Behaved Input States Do Not Violate Additivity for Conjugate Pairs of Random Quantum Channels

Asymptotically Well-Behaved Input States Do Not Violate Additivity for Conjugate Pairs of Random Quantum Channels
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渐近表现良好的输入状态不会违反随机量子通道共轭对的可加性

DOI:
10.1007/s00220-014-2038-5
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发表时间:
2012
影响因子:
2.4
通讯作者:
I. Nechita
I. Nechita
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
M. Fukuda;I. Nechita

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众所周知,在大概率情况下,最小输出熵的可加性对随机量子信道及其复共轭不成立。我们研究了这类对的r张量幂的输出态的渐近行为,随着输入维度的增加。我们计算任何行为良好的输入序列的极限输出状态,该序列由一大类具有一组很好的参数的输入状态组成。然后,我们证明了在这些输入态中,Bell态的张量积给出了渐近最小的输出熵,为上述通道对的可加性提供了积极的数学证据。
It is now well-known that, with high probability, the additivity of minimum output entropy does not hold for pairs of the random quantum channel and its complex conjugate. We investigate asymptotic behavior of output states of r-tensor powers of such pairs, as the dimension of inputs grows. We compute the limit output states for any sequence of well-behaved inputs, which consist of a large class of input states having a nice set of parameters. Then, we show that among these input states tensor products of Bell states give asymptotically the least output entropy, giving positive mathematical evidence towards additivity of above pairs of channels.
DOI: 10.1142/s1230161210000047
发表时间: 2009-07
期刊: Open Syst. Inf. Dyn.
影响因子: --
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发表时间: 2008-11-01
影响因子: 2.4
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