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Collective atomic scattering and motional effects in a dense coherent medium

Author

Listed:
  • S. L. Bromley

    (JILA, University of Colorado)

  • B. Zhu

    (JILA, University of Colorado)

  • M. Bishof

    (JILA, University of Colorado
    Present address: Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA)

  • X. Zhang

    (JILA, University of Colorado
    Present address: International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China)

  • T. Bothwell

    (JILA, University of Colorado)

  • J. Schachenmayer

    (JILA, University of Colorado)

  • T. L. Nicholson

    (JILA, University of Colorado
    Present address: Center for Ultracold Atoms, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA)

  • R. Kaiser

    (Université de Nice Sophia Antipolis, CNRS, Institut Non-Linéaire de Nice)

  • S. F. Yelin

    (University of Connecticut
    Harvard University)

  • M. D. Lukin

    (Harvard University)

  • A. M. Rey

    (JILA, University of Colorado)

  • J. Ye

    (JILA, University of Colorado)

Abstract

We investigate collective emission from coherently driven ultracold 88Sr atoms. We perform two sets of experiments using a strong and weak transition that are insensitive and sensitive, respectively, to atomic motion at 1 μK. We observe highly directional forward emission with a peak intensity that is enhanced, for the strong transition, by >103 compared with that in the transverse direction. This is accompanied by substantial broadening of spectral lines. For the weak transition, the forward enhancement is substantially reduced due to motion. Meanwhile, a density-dependent frequency shift of the weak transition (∼10% of the natural linewidth) is observed. In contrast, this shift is suppressed to

Suggested Citation

  • S. L. Bromley & B. Zhu & M. Bishof & X. Zhang & T. Bothwell & J. Schachenmayer & T. L. Nicholson & R. Kaiser & S. F. Yelin & M. D. Lukin & A. M. Rey & J. Ye, 2016. "Collective atomic scattering and motional effects in a dense coherent medium," Nature Communications, Nature, vol. 7(1), pages 1-7, April.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms11039
    DOI: 10.1038/ncomms11039
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