Single – Photon Interference with Thermally Excited Three – Level Cascade Atoms

Abstract

A theoretical model is presented for a single – photon interference experiment
in a beam - splitter using the second photon in a cascade transition of a three –
level atomic system. A clear anticorrelation effect is found in the coincidences
of photons on the two sides of the beam splitter that can only be explained
by quantum theory of light . A qualitative comparison is made with an earlier
single – photon interference experiment available in literature.