A two-photon correlation experiment that was proposed by Franson [ Phys. Rev. Lett. 62, 2205 ( 1989)] and was recently carried out is analyzed in terms of electromagnetic waves in order to see whether the observed fourth-order interference effects can be explained classically. The conclusion is that, although a classical field can give rise to such interference effects, no classical field can actually account for the observations reported.
© 1990 Optical Society of America
Original Manuscript: January 1, 1990
Manuscript Accepted: March 4, 1990
Published: October 1, 1990
Z. Y. Ou and L. Mandel, "Classical treatment of the Franson two-photon correlation experiment," J. Opt. Soc. Am. B 7, 2127-2131 (1990)