How well can you know the edge of a quantum pyramid?
How well can you know the edge of a quantum pyramid?
复制标题
你对量子金字塔的边缘了解多少？
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
J. Řeháček
中科院分区：
文献类型：
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作者：
B. Englert;J. Řeháček
我们考虑一个对称的量子通信方案，其中信号状态是任意尺寸和任意形状的量子金字塔的边缘，并且所有边缘状态以相同的概率传输。接收者可以采用不同的解码策略：他可以最大限度地减少错误概率，或无歧义的歧视，或提取可访问的信息。我们为每个策略陈述最佳测量方案。对于大的参数范围，标准平方根测量不能最佳地提取信息。[2]在雅诺什·贝尔古60岁生日之际，我们将这部作品献给他--他的朋友、同事和明确歧视的大师。
We consider a symmetric quantum communication scenario in which the signal states are edges of a quantum pyramid of arbitrary dimension and arbitrary shape, and all edge states are transmitted with the same probability. The receiver could employ different decoding strategies: he could minimize the error probability, or discriminate without ambiguity, or extract the accessible information. We state the optimal measurement scheme for each strategy. For large parameter ranges, the standard square-root measurement does not extract the information optimally. †We dedicate this work to János Bergou–friend, colleague, and grandmaster of unambiguous discrimination–on the occasion of his 60th birthday