We devise an approach to characterizing the intricate interplay between classical and quantum interference of two-photon states in a network, which comprises multiple time-bin modes. By controlling the phases of delocalized single photons, we manipulate the global mode structure, resulting in distinct two-photon interference phenomena for time-bin resolved (local) and time-bucket (global) coincidence detection. This coherent control over the photons’ mode structure allows for synthesizing two-photon interference patterns, where local measurements yield standard Hong-Ou-Mandel dips while the global two-photon visibility is governed by the overlap of the delocalized single-photon states. Thus, our experiment introduces a method for engineering distributed quantum interferences in networks.

中文翻译：

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量子网络中的局部与全局双光子干扰

我们设计了一种方法来表征网络中双光子状态的经典干扰与量子干扰之间的复杂相互作用，其中包括多个时区模式。通过控制离域单光子的相位，我们可以操纵全局模式结构，从而在分时分辨（局部）和时桶（全局）重合检测中产生明显的双光子干涉现象。对光子模式结构的相干控制允许合成双光子干涉图，其中局部测量会产生标准的Hong-Ou-Mandel倾角，而全局双光子可见度则由离域单光子状态的重叠控制。因此，我们的实验介绍了一种工程化网络中分布式量子干扰的方法。