Abstract: An experimental setup is presented in which the ghost diffraction phenomenon can be observed for two un-entangled photons in the same mode. No quantum non-locality is involved in this case, because the photons are not spatially separated. Therefore the ghost diffraction phenomenon is not an experimental evidence for quantum non-locality.

Key words: two-photon entanglement, ghost diffraction, quantum non-locality

摘要： 设计了一个实验装置，经理论计算表明，用此装置进行实验，应当可以观察到鬼衍射现象。在这个实验中，非纠缠光子对空间上没有分离，因而不牵涉非局域性。由此可以断定鬼衍射现象并不能作为量子力学非局域性存在的实验证明。

关键词: 双光子纠缠, 鬼衍射, 非局域性