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arXiv quant-ph/0502031quant-phcs.ET
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互无偏基是复射影2-设计

Mutually Unbiased Bases are Complex Projective 2-Designs

Andreas Klappenecker, Martin Roetteler

AI总结:

本文证明了互无偏基的最大集合等价于具有特定角度集的复射影2-设计,并重新证明了对称信息完备POVMs也是复射影2-设计。

摘要:

互无偏基(MUBs)是量子信息处理中用于捕捉互补性原理的一种原语。虽然对于素数幂维度d的系统,已知存在d+1个此类基的最大集合的构造,但未知对于任何非素数幂维度是否能达到该界限。在本文中,我们证明了MUBs的最大集合具有丰富的组合结构,方法是展示它们实际上与具有角度集{0,1/d}的复射影2-设计是相同的对象。我们还给出了一个新的简单证明,即对称信息完备POVMs是具有角度集{1/(d+1)}的复射影2-设计。

英文摘要:

Mutually unbiased bases (MUBs) are a primitive used in quantum information processing to capture the principle of complementarity. While constructions of maximal sets of d+1 such bases are known for systems of prime power dimension d, it is unknown whether this bound can be achieved for any non-prime power dimension. In this paper we demonstrate that maximal sets of MUBs come with a rich combinatorial structure by showing that they actually are the same objects as the complex projective 2-designs with angle set {0,1/d}. We also give a new and simple proof that symmetric informationally complete POVMs are complex projective 2-designs with angle set {1/(d+1)}.

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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