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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 14, Iss. 10 — May. 15, 2006
  • pp: 4514–4524

Steady State Entanglement in Cavity QED

P. R. Rice, J. Gea-Banacloche, M. L. Terraciano, D. L. Freimund, and L. A. Orozco  »View Author Affiliations

Optics Express, Vol. 14, Issue 10, pp. 4514-4524 (2006)

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We investigate steady state entanglement in an open quantum system, specifically a single atom in a driven optical cavity with cavity loss and spontaneous emission. The system reaches a steady pure state when driven very weakly. Under these conditions, there is an optimal value for atom-field coupling to maximize entanglement, as larger coupling favors a loss port due to the cavity enhanced spontaneous emission. We address ways to implement measurements of entanglement witnesses and find that normalized cross-correlation functions are indicators of the entanglement in the system. The magnitude of the equal time intensity-field cross correlation between the transmitted field of the cavity and the fluorescence intensity is proportional to the concurrence for weak driving fields.

© 2006 Optical Society of America

OCIS Codes
(270.0270) Quantum optics : Quantum optics
(270.5580) Quantum optics : Quantum electrodynamics

ToC Category:
Quantum Optics

Original Manuscript: March 6, 2006
Revised Manuscript: April 26, 2006
Manuscript Accepted: April 27, 2006
Published: May 15, 2006

P. R. Rice, J. Gea-Banacloche, M. L. Terraciano, D. L. Freimund, and L. A. Orozco, "Steady State Entanglement in Cavity QED," Opt. Express 14, 4514-4524 (2006)

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