Atomic quantum memory: Cavity versus single-pass schemes

A. Dantan, A. Bramati, and M. Pinard
Phys. Rev. A 71, 043801 – Published 4 April 2005

Abstract

We present a quantum mechanical treatment for both atomic and field fluctuations of an atomic ensemble interacting with propagating fields, either in electromagnetically induced transparency (EIT) or in a Raman situation. The atomic spin noise spectra and the outgoing field spectra are calculated in both situations. For suitable parameters both EIT and Raman schemes efficiently preserve the quantum state of the incident probe field in the transfer process with the atoms, although a single-pass scheme is shown to be intrinsically less efficient than a cavity scheme.

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  • Received 25 October 2004

DOI:https://doi.org/10.1103/PhysRevA.71.043801

©2005 American Physical Society

Authors & Affiliations

A. Dantan*, A. Bramati, and M. Pinard

  • Laboratoire Kastler Brossel, Université Pierre et Marie Curie, Case 74, 4 place Jussieu, 75252 Paris Cedex 05, France

  • *Electronic address: dantan@spectro.jussieu.fr

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Vol. 71, Iss. 4 — April 2005

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