Looking Beyond Visibility: Resolving the Temporal Structure of Continuous-Wave Four-Photon Hong-Ou-Mandel Interference
The work systematically resolves temporal structure in continuous-wave four-photon Hong-Ou-Mandel (HOM) interference by mapping all arrival times onto a three-dimensional coincidence histogram. This allows for distinguishing true interference events from accidental coincidences and provides methods to extract the HOM curve using different post-processing strategies, revealing trade-offs between visibility and count rate.