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arXiv 1606.04729quant-phphysics.optics
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用光子窥探光子:量子干涉与信息

Spying on photons with photons: quantum interference and information

Stefan Ataman

摘要:

在双缝实验中同时获得哪条路径的知识和干涉条纹的探索可以追溯到量子力学(QM)的诞生和著名的爱因斯坦-玻尔辩论。在本文中,我们提出并讨论了一个实验能够窥探一个光子的路径与另一个光子。我们修改的量子态内的干涉仪,而不是传统的物理修改的“类波”或“类粒子”的实验装置。我们能够证明,它是收获或不收获哪条路径信息的能力,最终限制了干涉图样的可见性,而不是“波状”或“粒子状”的实验设置。值得注意的是,如果量子态经过精心设计,一个完整的“类粒子”实验装置能够显示出100%可见度的干涉条纹。

英文摘要:

The quest to have both which-path knowledge and interference fringes in a double-slit experiment dates back to the inception of quantum mechanics (QM) and to the famous Einstein-Bohr debates. In this paper we propose and discuss an experiment able to spy on one photon's path with another photon. We modify the quantum state inside the interferometer as opposed to the traditional physical modification of the "wave-like" or "particle-like" experimental setup. We are able to show that it is the ability to harvest or not which-path information that finally limits the visibility of the interference pattern and not the "wave-like" or "particle-like" experimental setups. Remarkably, a full "particle-like" experimental setup is able to show interference fringes with 100 % visibility if the quantum state is carefully engineered.

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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