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Laser cooling of a single Ca+ ion: Observation of quantum jumps

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Abstract

This paper describes trapping and laser cooling of a Ca+ ion in an rf quadrupole ion trap. A single Ca+ ion is laser cooled to below 130 mK and quantum jumps are observed by exciting the ion into the metastable D 5/2 state via the P 3/2 state. The lifetime of the metastable D 5/2 state is estimated from the distribution of the dark periods of the quantum-jump signal. Collision-induced jumps between the metastable D 3/2 state and the D 5/2 state in a background gas are also directly observed.

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Authors and Affiliations

  1. Kansai Advanced Research Center, Communications Research Laboratory, Iwaoka, Nishi-ku, Kobe-shi, 651-24, Hyogo, Japan

    S. Urabe, K. Hayasaka, M. Watanabe, H. Imajo & R. Ohmukai

  2. Faculty of Engineering, Kagoshima University, Kohrimoto, Kagoshima-shi, 890, Kagoshima, Japan

    R. Hayashi

Authors
  1. S. Urabe
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  2. K. Hayasaka
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  3. M. Watanabe
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  4. H. Imajo
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  5. R. Ohmukai
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  6. R. Hayashi
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Urabe, S., Hayasaka, K., Watanabe, M. et al. Laser cooling of a single Ca+ ion: Observation of quantum jumps. Appl. Phys. B 57, 367–371 (1993). https://doi.org/10.1007/BF00332462

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  • DOI: https://doi.org/10.1007/BF00332462

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