arXiv 1002.03502010-02-01quant-ph

两个不同颜色光子的干涉

Interference of two photons of different color

M. G. Raymer, S. J. van Enk, C. J. McKinstrie, H. J. McGuinness

备注：: Published in a special issue of Optics Communications, dedicated to Krzysztof Wodkiewicz
发表信息：: Opt. Commun. 283, 747 (2010)
DOI：: 10.1016/j.optcom.2009.10.057

摘要：

我们考虑的背景下，具有不同颜色的两个光子的干涉Hong-Ou-Mandel实验，其中单个光子进入每个输入端口的分束器，并退出在同一个，但不确定的，输出端口。如果使用有源（非节能）分束器，则这种干涉是可能的。我们发现一个“红色”和一个“蓝色”光子进入分束器，两个红色或两个蓝色光子退出，但从来没有每种颜色之一的情况。我们展示了如何精确的形式的主动分束器变换确定以何种方式的光谱自由度的输入光子应该是相互相关的完美的相消干涉的不同颜色的组件中的输出。我们讨论了两个例子的主动分束器：一个是一个gedanken实验涉及一个移动的镜子，另一个是一个更现实的例子，涉及在光纤中的四波混频。

英文摘要：

We consider the interference of two photons with different colors in the context of a Hong-Ou-Mandel experiment, in which single photons enter each of the input ports of a beam splitter, and exit in the same, albeit undetermined, output port. Such interference is possible if one uses an active (energy-non-conserving) beam splitter. We find scenarios in which one "red" and one "blue" photon enter the beam splitter, and either two red or two blue photons exit, but never one of each color. We show how the precise form of the active beam-splitter transformation determines in what way the spectral degrees of freedom of the input photons should be related to each other for perfect destructive interference of the different-color components in the output. We discuss two examples of active beam splitters: one is a gedanken experiment involving a moving mirror and the other is a more realistic example involving four-wave mixing in an optical fiber.

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英文摘要：

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