Physics – Quantum Physics
Scientific paper
2001-12-11
Phys. Rev. A 63, 063803 (2001)
Physics
Quantum Physics
21 pages, 7 figures
Scientific paper
10.1103/PhysRevA.63.063803
The visibilities of second-order (single-photon) and fourth-order (two-photon) interference have been observed in a Young's double-slit experiment using light generated by spontaneous parametric down-conversion and a photon-counting intensified CCD camera. Coherence and entanglement underlie one-and two-photon interference, respectively. As the effective source size is increased, coherence is diminished while entanglement is enhanced, so that the visibility of single-photon interference decreases while that of two-photon interference increases. This is the first experimental demonstration of the complementarity between single- and two-photon interference (coherence and entanglement) in the spatial domain.
Abouraddy Ayman F.
Nasr Magued B.
Saleh Bahaa E. A.
Sergienko Alexander Vladimir
Teich Malvin Carl
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