First-order interference of nonclassical light emitted spontaneously at different times
Yoon-Ho Kim, Maria V. Chekhova, S. P. Kulik, Yanhua H. Shih, Morton H. Rubin · Physical Review A · 2000
We study the first-order interference in spontaneous parametric down-conversion generated by two pump pulses that are well distinguishable in time. The observed modulation in the angular distribution of the signal photon can only be explained in terms of a quantum-mechanical description based on biphoton states. The condition for observing interference in the signal channel is shown to depend on the parameters of the idler photon.