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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry M. Van Driel
  • Vol. 24, Iss. 2 — Feb. 1, 2007
  • pp: 249–256

Entanglement in the above-threshold optical parametric oscillator

Alessandro S. Villar, Katiúscia N. Cassemiro, Kaled Dechoum, Antonio Z. Khoury, Marcelo Martinelli, and Paulo Nussenzveig  »View Author Affiliations


JOSA B, Vol. 24, Issue 2, pp. 249-256 (2007)
http://dx.doi.org/10.1364/JOSAB.24.000249


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Abstract

We investigate entanglement in the above-threshold optical parametric oscillator, both theoretically and experimentally, and discuss its potential applications to quantum information. The fluctuations measured in the subtraction of signal and idler amplitude quadratures are Δ 2 p ̂ = 0.50 ( 1 ) , or 3.01 ( 9 ) dB, and in the sum of phase quadratures they are Δ 2 q ̂ + = 0.73 ( 1 ) , or 1.37 ( 6 ) dB. A detailed experimental study of the noise behavior as a function of pump power is presented, and the discrepancies with theory are discussed.

© 2007 Optical Society of America

OCIS Codes
(190.4970) Nonlinear optics : Parametric oscillators and amplifiers
(270.0270) Quantum optics : Quantum optics
(270.6570) Quantum optics : Squeezed states

ToC Category:
Entanglement

History
Original Manuscript: May 12, 2006
Manuscript Accepted: June 27, 2006
Published: January 26, 2007

Citation
Alessandro S. Villar, Katiúscia N. Cassemiro, Kaled Dechoum, Antonio Z. Khoury, Marcelo Martinelli, and Paulo Nussenzveig, "Entanglement in the above-threshold optical parametric oscillator," J. Opt. Soc. Am. B 24, 249-256 (2007)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-24-2-249

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