Quantum interference by a nonlocal double slit
E. J. S. Fonseca, P. H. Souto Ribeiro, Sebastião Pádua, Carlos Henrique Monken · Physical Review A · 1999
We report an interference experiment in which photon pairs generated by spontaneous parametric down-conversion produce a Young-type fourth-order interference pattern after being scattered by two different and spatially separated apertures, whose superposition defines a double slit. The experiment is compared with previous ones based on parametric down-conversion, and its nonlocal nature is discussed. A theoretical explanation is also provided.