Phys. Rev. A 63, 063803 (2001) [6 pages]Demonstration of the complementarity of one- and two-photon interference |
A. F. Abouraddy, M. B. Nasr, B. E. A. Saleh *, A. V. Sergienko, and M. C. Teich †
Quantum Imaging Laboratory, Department of Electrical and Computer Engineering, Boston University, 8 Saint Mary’s Street, Boston, Massachusetts 02215
Received 26 December 2000; published 8 May 2001
The visibilities of second-order (one-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 charge-coupled device 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 one-photon interference decreases while that of two-photon interference increases. This experiment demonstrates the complementarity between one- and two-photon interference (coherence and entanglement) in the spatial domain.
©2001 The American Physical Society
URL: http://link.aps.org/abstract/PRA/v63/e063803
DOI: 10.1103/PhysRevA.63.063803
PACS: 42.50.Dv, 42.65.Ky
* Electronic address: besaleh@bu.edu
† URL: http://www.bu.edu/qil
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