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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 16 — Aug. 6, 2007
  • pp: 10182–10188

Two-photon entanglement generation: different Bell states within the linewidth of phase-matching

G. Brida, M. V. Chekhova, M. Genovese, and L. A. Krivitsky  »View Author Affiliations

Optics Express, Vol. 15, Issue 16, pp. 10182-10188 (2007)

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It is shown that for a phase-matched nonlinear process producing entangled states, different Bell states are generated for different mismatch values. In particular, generation of the singlet Bell state is demonstrated within the natural linewidth of collinear frequency-degenerate type-II spontaneous parametric down-conversion (SPDC) without the o-e delay compensation. The singlet state can be filtered out by spectral selection or by the time selection of the two-photon amplitude at the output of a dispersive fibre. The effect is of considerable importance for fibre quantum communication.

© 2007 Optical Society of America

OCIS Codes
(270.0270) Quantum optics : Quantum optics

ToC Category:
Quantum Optics

Original Manuscript: May 8, 2007
Revised Manuscript: June 12, 2007
Manuscript Accepted: June 12, 2007
Published: July 27, 2007

G. Brida, M. V. Chekhova, M. Genovese, and L. A. Krivitsky, "Two-photon entanglement generation: different Bell states within the linewidth of phase-matching," Opt. Express 15, 10182-10188 (2007)

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