中国物理B ›› 2010, Vol. 19 ›› Issue (1): 14210-014210.doi: 10.1088/1674-1056/19/1/014210

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Effects of an applied low frequency field on the dynamics of a two-level atom interacting with a single-modefield

徐勋卫1, 刘念华2   

  1. (1)Department of Physics, Nanchang University, Nanchang 330031, China; (2)Department of Physics, Nanchang University, Nanchang 330031, China;Institute for Advanced Study, Nanchang University, Nanchang 330031, China
  • 收稿日期:2009-05-07 修回日期:2009-06-05 出版日期:2010-01-15 发布日期:2010-01-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 10664002 and 10832005), the Program for Changjiang Scholars and Innovative Research Team in University (Grant No. IRT0730), and the Program for International Science and Technology Cooperation Program of China (Grant No. 2009DFA02320).

Effects of an applied low frequency field on the dynamics of a two-level atom interacting with a single-mode field

Xu Xun-Wei(徐勋卫)a) and Liu Nian-Hua(刘念华) a)b)†   

  1. a Department of Physics, Nanchang University, Nanchang 330031, China; b Institute for Advanced Study, Nanchang University, Nanchang 330031, China
  • Received:2009-05-07 Revised:2009-06-05 Online:2010-01-15 Published:2010-01-15
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 10664002 and 10832005), the Program for Changjiang Scholars and Innovative Research Team in University (Grant No. IRT0730), and the Program for International Science and Technology Cooperation Program of China (Grant No. 2009DFA02320).

摘要: The effects of an applied low frequency field on the dynamics of a two-level atom interacting with a single-mode field are investigated. It is shown that the time evolution of the atomic population is mainly controlled by the coupling constants and the frequency of the low frequency field, which leads to a low frequency modulation function for the time evolution of the upper state population. The amplitude of the modulation function becomes larger as the coupling constants increase. The frequency of the modulation function is proportional to the frequency of the low frequency field, and decreases with increasing coupling constant.

Abstract: The effects of an applied low frequency field on the dynamics of a two-level atom interacting with a single-mode field are investigated. It is shown that the time evolution of the atomic population is mainly controlled by the coupling constants and the frequency of the low frequency field, which leads to a low frequency modulation function for the time evolution of the upper state population. The amplitude of the modulation function becomes larger as the coupling constants increase. The frequency of the modulation function is proportional to the frequency of the low frequency field, and decreases with increasing coupling constant.

Key words: two-level atom, low frequency field, single-mode field

中图分类号:  (Photoionization and excitation)

  • 32.80.-t
42.50.-p (Quantum optics)