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arXiv quant-ph/0106078quant-ph
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双缝量子擦除器

A double-slit quantum eraser

S. P. Walborn, M. O. Terra Cunha, S. Padua, C. H. Monken

摘要:

我们报道了一个量子擦除实验,它实际上使用了一个杨氏双缝来产生干涉。这个实验可以被认为是斯卡利、恩格勒和瓦尔特提出的一个实验的光学类比。纠缠对的一个光子入射到适当尺寸的杨氏双缝上,在远处的检测区域产生干涉图样。四分之一波片,定向,使他们的快轴是正交的,被放置在前面的每一个狭缝,作为哪一个路径标记。四分之一波片标记了干涉光子的偏振,从而破坏了干涉图样。为了恢复干涉,我们测量了另一个纠缠光子的偏振。此外,我们在延迟擦除的情况下进行实验。

英文摘要:

We report a quantum eraser experiment which actually uses a Young double-slit to create interference. The experiment can be considered an optical analogy of an experiment proposed by Scully, Englert and Walther. One photon of an entangled pair is incident on a Young double-slit of appropriate dimensions to create an interference pattern in a distant detection region. Quarter-wave plates, oriented so that their fast axes are orthogonal, are placed in front of each slit to serve as which-path markers. The quarter-wave plates mark the polarization of the interfering photon and thus destroy the interference pattern. To recover interference, we measure the polarization of the other entangled photon. In addition, we perform the experiment under delayed erasure circumstances.

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