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Multiparticle Interference of Pairwise Distinguishable Photons
Physical Review Letters ( IF 8.6 ) Pub Date : 2020-09-18 , DOI: 10.1103/physrevlett.125.123603
Alex E. Jones , Adrian J. Menssen , Helen M. Chrzanowski , Tom A. W. Wolterink , Valery S. Shchesnovich , Ian A. Walmsley

One of the central principles of quantum mechanics is that if there are multiple paths that lead to the same event and there is no way to distinguish between them, interference occurs. It is often assumed that distinguishing information in the preparation, evolution, or measurement of a system is sufficient to destroy interference. However, it is still possible for photons in distinguishable, separable states to interfere due to the indistinguishability of paths corresponding to possible exchange processes. Here we experimentally measure an interference signal that depends only on the multiparticle interference of four photons in a four-port interferometer despite pairs of them occupying distinguishable states.

中文翻译:

成对可区分光子的多粒子干涉

量子力学的中心原则之一是,如果有导致同一事件的多条路径,而没有办法区分它们,则会发生干扰。通常认为,在系统的准备,演进或测量中区分信息足以破坏干扰。然而,由于与可能的交换过程相对应的路径的不可区分性,处于可区分,可分离状态的光子仍然可能发生干扰。在这里,我们实验性地测量一个干扰信号,该信号仅取决于四端口干涉仪中四个光子的多粒子干涉,尽管它们成对存在可区分的状态。
更新日期:2020-09-20
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