Enhanced Nonclassical Third‐Order Spatial Intensity Correlations in Three‐Beam Interferences<
Th. Richter · Annalen der Physik · 1991
Abstract The joint probability of detecting simultaneously three photons at two and three points in the superposition field of three independent plane waves with the same frequency but random phases is calculated and compared with the results of a classical wave theory. Significant differences occur for sufficiently weak fields. We find that the differences between the quantum mechanical and classical predictions concerning the third order intensity correlation functions are more pronounced in a three‐beam than in a two‐beam interference experiment.