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Laser cooling of a single Ca+ ion: Observation of quantum jumps |
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| Authors: | S. Urabe K. Hayasaka M. Watanabe H. Imajo R. Ohmukai R. Hayashi |
| Affiliation: | (1) Kansai Advanced Research Center, Communications Research Laboratory, Iwaoka, Nishi-ku, Kobe-shi, 651-24 Hyogo, Japan;(2) Faculty of Engineering, Kagoshima University, Kohrimoto, Kagoshima-shi, 890 Kagoshima, Japan |
| 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 D5/2 state via the P3/2 state. The lifetime of the metastable D5/2 state is estimated from the distribution of the dark periods of the quantum-jump signal. Collision-induced jumps between the metastable D3/2 state and the D5/2 state in a background gas are also directly observed. |
| Keywords: | 32.80. Pj 32.70. Fw 34.50 |
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