Data underlying the publication: "Multiphoton interference outperforms pairwise overlaps for distinguishability characterization"

We propose a protocol that characterizes the pairwise overlaps of the internal modes of single photons moreefficiently than pairwise Hong-Ou-Mandel characterization experiments. This protocol exploits multiphotoninterference. We experimentally implement this protocol to characterize three photons. We show that ourimplementation of the characterization protocol outperforms the pairwise Hong-Ou-Mandel characterization,even if the Hong-Ou-Mandel characterization would have been performed in a noiseless, perfect experiment.We demonstrate this via the Fisher information matrix.

我们提出了一种相较于成对洪-欧-曼德尔（Hong-Ou-Mandel）表征实验，能更高效地表征单光子内部模式间成对重叠度的实验方案。该方案利用多光子干涉效应，我们通过实验实现了该方案以表征三光子的模式特性。研究表明，即便在无噪声的理想实验环境中开展成对洪-欧-曼德尔表征，本表征方案的性能仍优于该成对表征方法。我们通过费舍尔信息矩阵（Fisher information matrix）验证了这一结论。