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arXiv quant-ph/0212058quant-ph
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符合基下的光学Bell态分析

Optical Bell-state analysis in the coincidence basis

S. P. Walborn, W. A. T. Nogueira, S. Pádua, C. H. Monken

摘要:

许多量子信息协议都需要对纠缠系统进行Bell态测量。大多数光学贝尔态测量利用分束器处的双光子干涉。利用一阶厄米-高斯泵浦光产生自发参量下转换的偏振纠缠光子,反转了通常的干涉行为,并在符合基下进行了不完全Bell态测量。我们讨论了在符合基中利用超纠缠态进行完全Bell态测量的可能性[Phys. Rev. A,\textbf{58},R2623(1998)]。

英文摘要:

Many quantum information protocols require a Bell-state measurement of entangled systems. Most optical Bell-state measurements utilize two-photon interference at a beam splitter. By creating polarization-entangled photons with spontaneous parametric down-conversion using a first-order Hermite-Gaussian pump beam, we invert the usual interference behavior and perform an incomplete Bell-state measurement in the coincidence basis. We discuss the possibility of a complete Bell-state measurement in the coincidence basis using hyperentangled states [Phys. Rev. A, \textbf{58}, R2623 (1998)].

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