Interference and indistinguishability governed by time delays in a low-Qcavity
Timothy P. Grayson, X. Y. Zou, David Branning, J. R. Torgerson, L. Mandeļ · Physical Review A · 1993
An interference experiment with signal photons from two parametric down-converters, based on the process of induced coherence without induced emission, has been performed. A low-Q optical cavity provides a possible time delay for the idlers. Whether the idler photon is to be delayed or not then determines whether the signal photon behaves like a wave and exhibits interference or behaves like a particle.