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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 36, Iss. 14 — Jul. 15, 2011
  • pp: 2740–2742

Observation of coherence between two independent atomic ensembles by Raman scattering

Li-Qing Chen, Guo-Wan Zhang, Cheng-ling Bian, Z. Y. Ou, and Weiping Zhang  »View Author Affiliations


Optics Letters, Vol. 36, Issue 14, pp. 2740-2742 (2011)
http://dx.doi.org/10.1364/OL.36.002740


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Abstract

By using spontaneous Raman processes in the high-gain regime, we create instantaneous coherence between two independent atomic ensembles. The coherence is confirmed by the observation of temporal beating between the two subsequent readout fields converted from the atomic excitations through another enhanced Raman process. The beat frequency is found to be a result of an AC Stark frequency shift effect. We find that, due to the spontaneous nature of the process, the phases of the two ensembles change from one realization to another even though there is good coherence for a single realization.

© 2011 Optical Society of America

OCIS Codes
(190.0190) Nonlinear optics : Nonlinear optics
(190.4410) Nonlinear optics : Nonlinear optics, parametric processes
(270.0270) Quantum optics : Quantum optics
(270.5565) Quantum optics : Quantum communications

ToC Category:
Quantum Optics

History
Original Manuscript: April 19, 2011
Revised Manuscript: June 17, 2011
Manuscript Accepted: June 17, 2011
Published: July 14, 2011

Citation
Li-Qing Chen, Guo-Wan Zhang, Cheng-ling Bian, Z. Y. Ou, and Weiping Zhang, "Observation of coherence between two independent atomic ensembles by Raman scattering," Opt. Lett. 36, 2740-2742 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-14-2740


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