Quantum-information division and an optimal uncorrelated channel
Quantum-information division and an optimal uncorrelated channel
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DOI：
10.1103/physreva.89.034304
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发表时间：
2013-07
影响因子：
2.9
通讯作者：
Yuji Sekino;S. Ishizaka
中科院分区：
文献类型：
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作者：
Yuji Sekino;S. Ishizaka
我们考虑量子信息划分，其特征是通道的输出没有相关性并且不是完全随机的。我们证明，通过在确定性和概率情况下优化具有 $M$ 输出的通道中的平均保真度，可以以概率方式进行量子信息划分。此外，我们表明，最佳保真度会根据输出条件（对称和不对称）而发生巨大变化，这与不完美克隆的情况形成鲜明对比。
We consider quantum-information division, which is characterized by a channel whose outputs have no correlation and are not completely randomized. We show that the quantum-information division is possible in a probabilistic manner by optimizing the average fidelity in the channel with $M$ outputs in both deterministic and probabilistic cases. Moreover, we show that the optimal fidelities drastically change depending on the condition imposed on the outputs (symmetric and asymmetric), which is quite in contrast to the case of imperfect cloning.