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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Editor: Henry van Driel
  • Vol. 29, Iss. 7 — Jul. 1, 2012
  • pp: 1822–1828

Transfer of spin squeezing and particle entanglement between atoms and photons in coupled cavities via two-photon exchange

Ali Ü. C. Hardal and Özgür E. Müstecaplıoğlu  »View Author Affiliations

JOSA B, Vol. 29, Issue 7, pp. 1822-1828 (2012)

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We examine transfer of particle entanglement and spin squeezing between atomic and photonic subsystems in optical cavities coupled by two-photon exchange. Each cavity contains a single atom, interacting with cavity photons with a two-photon cascade transition. Particle entanglement is characterized by evaluating optimal spin squeezing inequalities for the cases of initially separable and entangled two-photon states. It is found that particle entanglement is first generated among the photons in separate cavities and then transferred to the atoms. The underlying mechanism is recognized as an intercavity two-axis twisting spin squeezing interaction, induced by two-photon exchange, and its optimal combination with the intracavity atom–photon coupling. Relative effect of nonlocal two-photon exchange and local atom–photon interactions of cavity photons on the spin squeezing and entanglement transfer is pointed out.

© 2012 Optical Society of America

OCIS Codes
(270.4180) Quantum optics : Multiphoton processes
(270.5580) Quantum optics : Quantum electrodynamics
(270.5585) Quantum optics : Quantum information and processing

ToC Category:
Quantum Optics

Original Manuscript: March 15, 2012
Revised Manuscript: May 19, 2012
Manuscript Accepted: May 20, 2012
Published: June 27, 2012

Ali Ü. C. Hardal and Özgür E. Müstecaplıoğlu, "Transfer of spin squeezing and particle entanglement between atoms and photons in coupled cavities via two-photon exchange," J. Opt. Soc. Am. B 29, 1822-1828 (2012)

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