Pittman, T. B.Strekalov, D. V.Migdall, A.Rubin, M. H.Sergienko, A. V.Shih, Yanhua2020-07-302020-07-301996-09-02T. B. Pittman, D. V. Strekalov, A. Migdall, M. H. Rubin, A. V. Sergienko, and Y. H. Shih, Can Two-Photon Interference be Considered the Interference of Two Photons?,Phys. Rev. Lett. 77(10), 1917, DOI:https://doi.org/10.1103/PhysRevLett.77.1917https://doi.org/10.1103/PhysRevLett.77.1917http://hdl.handle.net/11603/19287We report on a “postponed compensation” experiment in which the observed two-photon entangled state interference cannot be pictured in terms of the overlap of the two individual photon wave packets of a parametric down-conversion pair on a beam splitter. In the sense of a quantum eraser, the distinguishability of the different two-photon Feynman amplitudes leading to a coincidence detection is removed by delaying the compensation until after the output of an unbalanced two-photon interferometer.4 pagesen-USThis item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.Public Domain Mark 1.0This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore 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.Text