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arXiv quant-ph/9904056quant-ph
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任意自旋系统的最佳广义量子测量

Optimal generalized quantum measurements for arbitrary spin systems

A. Acin, J. I. Latorre, P. Pascual

摘要:

本文讨论了任意自旋J的有限个N个同调系统的正算子值测量。纯态的特征在于由SU(2 J+1)协变约束约束的布洛赫类矢量。这种表示允许通过最佳测量来实现对方程的简单描述。我们明确地找到了N=2情况下的最小POVM,N=3的严格界,并建立了任意N的分析。

英文摘要:

Positive operator valued measurements on a finite number of N identically prepared systems of arbitrary spin J are discussed. Pure states are characterized in terms of Bloch-like vectors restricted by a SU(2 J+1) covariant constraint. This representation allows for a simple description of the equations to be fulfilled by optimal measurements. We explicitly find the minimal POVM for the N=2 case, a rigorous bound for N=3 and set up the analysis for arbitrary N.

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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