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arXiv quant-ph/0309120quant-phcs.ET
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互无偏基的构造

Constructions of Mutually Unbiased Bases

Andreas Klappenecker, Martin Roetteler

AI总结:

本文研究了互无偏基的构造,基于指数和估计给出了当维度为素数幂时存在d+1个互无偏基的简化证明,并讨论了任意维度下的最大数量猜想与开放问题。

摘要:

d维复内积空间的两个标准正交基B和B'称为互无偏的,当且仅当对所有B中的b和B'中的b',|<b|b'>|^2=1/d成立。包含C^d的(两两)互无偏基的任何集合的大小不能超过d+1。如果d是素数的幂,则已知存在包含d+1个互无偏基的极值集合。我们基于指数和的估计给出了这一事实的简化证明。我们讨论了关于任意维度的互无偏基的最大数量的猜想和开放问题。

英文摘要:

Two orthonormal bases B and B' of a d-dimensional complex inner-product space are called mutually unbiased if and only if |<b|b'>|^2=1/d holds for all b in B and b' in B'. The size of any set containing (pairwise) mutually unbiased bases of C^d cannot exceed d+1. If d is a power of a prime, then extremal sets containing d+1 mutually unbiased bases are known to exist. We give a simplified proof of this fact based on the estimation of exponential sums. We discuss conjectures and open problems concerning the maximal number of mutually unbiased bases for arbitrary dimensions.

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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