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arXiv 1202.5741quant-phmath-phmath.MP
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条件SIC-POVM

Conditional SIC-POVMs

D. Petz, L. Ruppert, A. Szanto

摘要:

在本文中,我们研究了对称信息完全POVM的推广。SIC-POVM是全量子层析成像的最优测量方法,但如果密度矩阵的某些参数已知,则最优的SIC-POVM必须与子空间正交。这给出了条件SIC-POVM的概念。在一般情况下,这种存在性是未知的,但在密度矩阵的对角线已知的特殊情况下,我们给出了一个结果。

英文摘要:

In this paper we examine a generalization of the symmetric informationally complete POVMs. SIC-POVMs are the optimal measurements for full quantum tomography, but if some parameters of the density matrix are known, then the optimal SIC POVM should be orthogonal to a subspace. This gives the concept of the conditional SIC-POVM. The existence is not known in general, but we give a result in the special cases when the diagonal is known of the density matrix.

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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