We propose a setup for a heralded, i.e. announced generation of a puresingle-photon state given two imperfect sources whose outputs are representedby mixtures of the single-photon Fock state $\ket{1}$ with the vacuum$\ket{0}$. Our purification scheme uses beam splitters, photodetection and atwo-photon-absorbing medium. The admixture of the vacuum is fully eliminated.We discuss two potential realizations of the scheme.
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机译：我们提出了一种预示性的设置，即宣布给定的纯单光子状态生成，其中有两个不完美的源，其输出由单光子Fock状态$ \ ket {1} $与vacuum $ \ ket {0} $的混合表示。我们的纯化方案使用分束器，光电检测和双光子吸收介质。完全消除了真空的混合。我们讨论了该方案的两个潜在实现。
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