The origin of Franson-type nonlocal correlation

Franson-type nonlocal correlation results in a second-order intensity fringe between two remotely separated parties via coincidence measurements, whereas the corresponding local measurements show perfect incoherence feature. This paired photons is mysterious due to randomness both parties. Here, Franson analytically investigated using wave nature of understand quantum As result, turned out be measurement selection-based coherence feature, while from effective decoherence among broad bandwidth-distributed photon pairs. version suggested for macroscopic applications with commercial laser. The and correlations proposed scheme same as entangled photon-pair based correlation.