EPR experiment and 2-photon interferometry: Report of a 2-photon interference experiment
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Shih, Y. H., M. H. Rubin, and A. V. Sergienko. “EPR Experiment and 2-Photon Interferometry: Report of a 2-Photon Interference Experiment.” Presented at Workshop on Squeezed States and Uncertainty Relations, February 1, 1992. https://ntrs.nasa.gov/citations/19920012807.
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This is a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
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Abstract
After a very brief review of the historical Einstein, Podolsky, and Rosen (EPR) experiments, a new two-photon interference type EPR experiment is reported. A two-photon state was generated by optical parametric down conversion. Pairs of light quanta with degenerate frequency but divergent directions of propagation were sent to two independent Michelson interferometers. First and second order interference effectors were studied. Different than other reports, we observed that the second order interference visibility vanished when the optical path difference of the interferometers were much less than the coherence length of the pumping laser beam. However, we also observed that the second order interference behaved differently depending on whether the interferometers were set at equal or different optical path differences.