中国物理B ›› 2009, Vol. 18 ›› Issue (8): 3395-3403.doi: 10.1088/1674-1056/18/8/045

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Kinetic theory of (2+4)-level atom in σ+-σ- laser fields

于闯, 于得水, 陈景标   

  1. Institute of Quantum Electronics, School of Electronics Engineering \& Computer Science, Peking University, Beijing 100871, China
  • 收稿日期:2008-07-18 修回日期:2009-04-21 出版日期:2009-08-20 发布日期:2009-08-20
  • 基金资助:
    Project supported by the National Fundamental Research Programme of China (Grants No 2005CB724500).

Kinetic theory of (2+4)-level atom in $\sigma^+-\sigma^-$ laser fields

Yu Chuang(于闯), Yu De-Shui(于得水), and Chen Jing-Biao(陈景标)†   

  1. Institute of Quantum Electronics, School of Electronics Engineering \& Computer Science, Peking University, Beijing 100871, China
  • Received:2008-07-18 Revised:2009-04-21 Online:2009-08-20 Published:2009-08-20
  • Supported by:
    Project supported by the National Fundamental Research Programme of China (Grants No 2005CB724500).

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摘要： The kinetic theory of (2+4)-level atoms in $\sigma^+-\sigma^-$ laser fields is presented. We systemically discuss friction coefficient, momentum diffusion tensor and atomic temperature based on the Fokker--Planck equation. This cooling system is much like that of a (1+3)-level atom, and the temperature is still limited to the Doppler temperature. Since this cooling system has not been investigated before, this work may be regarded as a necessary complement to the laser cooling theory.

Abstract: The kinetic theory of (2+4)-level atoms in $\sigma^+-\sigma^-$ laser fields is presented. We systemically discuss friction coefficient, momentum diffusion tensor and atomic temperature based on the Fokker--Planck equation. This cooling system is much like that of a (1+3)-level atom, and the temperature is still limited to the Doppler temperature. Since this cooling system has not been investigated before, this work may be regarded as a necessary complement to the laser cooling theory.

Key words: laser cooling, Fokker--Planck equation, quantum optics

中图分类号:  (Atom cooling methods)

  • 37.10.De
31.15.-p (Calculations and mathematical techniques in atomic and molecular physics)