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In-situ dual-port polarization contrast imaging of Faraday rotation in a high optical depth ultracold 87Rb atomic ensemble

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Abstract

We study the effects of high optical depth and density on the performance of a light-atom quantum interface. An in-situ imaging method, a dual-port polarization contrast technique, is presented. This technique is able to compensate for image distortions due to refraction. We propose our imaging method as a tool to characterize atomic ensembles for high capacity spatial multimode quantum memories. Ultracold dense inhomogeneous rubidium samples are imaged and we find a resonant optical depth as high as 680 on the D1 line. The measurements are compared with light-atom interaction models based on Maxwell-Bloch equations. We find that an independent atom assumption is insufficient to explain our data and present corrections due to resonant dipole-dipole interactions.

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Authors and Affiliations

  1. Niels-Bohr-Institute, Danish Quantum Optics Center QUANTOP, Copenhagen University, Blegdamsvej 17, 2100, Copenhagen, Denmark

    F. Kaminski, N. S. Kampel, M. P. H. Steenstrup, A. Griesmaier, E. S. Polzik & J. H. Müller

  2. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, 70569, Stuttgart, Germany

    A. Griesmaier

Authors
  1. F. Kaminski
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  2. N. S. Kampel
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  3. M. P. H. Steenstrup
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  4. A. Griesmaier
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  5. E. S. Polzik
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  6. J. H. Müller
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Correspondence to F. Kaminski.

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Kaminski, F., Kampel, N.S., Steenstrup, M.P.H. et al. In-situ dual-port polarization contrast imaging of Faraday rotation in a high optical depth ultracold 87Rb atomic ensemble. Eur. Phys. J. D 66, 227 (2012). https://doi.org/10.1140/epjd/e2012-30038-0

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  • DOI: https://doi.org/10.1140/epjd/e2012-30038-0

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