Answers are grounded in this paper and cite their sources.
We perform a two-photon interference experiment in a Michelson interferometer with photon pairs produced by spontaneous parametric down-conversion. The interferometer is set to a path difference much larger than the coherence length of the light field. Application of a time-resolved coincidence detection scheme reveals two-photon interference fringes with a visibility of 87%. This high visibility clearly demonstrates the nonclassical nature of the observed interference and should allow further spin-free tests of Bell's inequalities.
No takes yet. Share an insight, caveat, or question.
Brendel et al. (1991) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: