Eliminating frequency and space-time entanglement in multi-photon states

  • W. P. Grice
  • A. B. U’Ren
  • I. A. Walmsley
Conference paper


Visibility in interference experiments involving photon pairs from separate down-conversion events is reduced when these pairs are frequency-entangled. We present a method for eliminating the entanglement at the source, making pre-detection spectral filters unnecessary.

OCIS codes

(999.9999) Ultrafast quantum optics (270.1670) Coherent opticaleffects 


  1. [1]
    D. Bouwmeester, et al., “Experimental quantum teleportation.” Nature, 390, 575–579, (1997).ADSCrossRefGoogle Scholar
  2. [2]
    J. Pan, et al., “Experimental entanglement swapping: entangling photons that never interacted.” Phys. Rev. Lett., 80, 3891–3894, (1998).MathSciNetADSMATHCrossRefGoogle Scholar
  3. [3]
    W. Grice and I. Walmsley, “Spectral information and distinguishability in type-II downconversion with a broadband pump.” Phys. Rev. A, 56, 1627–1634, (1997).ADSCrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 2003

Authors and Affiliations

  • W. P. Grice
    • 1
  • A. B. U’Ren
    • 2
  • I. A. Walmsley
    • 2
  1. 1.Center for Engineering Science Advanced ResearchOak Ridge National LaboratoryOak Ridge
  2. 2.The Institute of OpticsUniversity of RochesterRochester

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