中国物理B ›› 2010, Vol. 19 ›› Issue (8): 84204-084204.doi: 10.1088/1674-1056/19/8/084204

• CLASSICAL AREAS OF PHENOMENOLOGY • 上一篇    下一篇

Quantum coherence in Λ-three-level system driven by bichromatic coupling field

杨丽君, 赵敏, 张连水, 冯晓敏, 李晓莉, 尉长江   

  1. College of Physical Science and Technology, Hebei University, Baoding 071002, China
  • 收稿日期:2009-07-24 修回日期:2009-12-16 出版日期:2010-08-15 发布日期:2010-08-15
  • 基金资助:
    Project supported by the Natural Science Foundation of Hebei Province, China (Grant No. A2009000140).

Quantum coherence in Λ-three-level system driven by bichromatic coupling field

Yang Li-Jun(杨丽君), Zhao Min(赵敏), Zhang Lian-Shui(张连水), Feng Xiao-Min(冯晓敏), Li Xiao-Li(李晓莉), and Wei Chang-Jiang(尉长江)   

  1. College of Physical Science and Technology, Hebei University, Baoding 071002, China
  • Received:2009-07-24 Revised:2009-12-16 Online:2010-08-15 Published:2010-08-15
  • Supported by:
    Project supported by the Natural Science Foundation of Hebei Province, China (Grant No. A2009000140).

摘要: We present a theoretical study of quantum coherent effects in a λ-three-level system with a strong bichromatic coupling field and a weak probe field. When one component of the strong bichromatic coupling field is resonant with a corresponding transition and the other is detuning with an integer fraction of the Rabi frequency of the resonant field, the absorption spectrum exhibits a series of symmetrical doublets. While two frequencies of the strong bichromatic coupling field are symmetrically detuned from the transition, the position and the relative intensity of the absorption peak are both affected by the coupling field intensity and detuning. An explanation of the spectrum is given in term of the dressed-state formalism.

Abstract: We present a theoretical study of quantum coherent effects in a Λ-three-level system with a strong bichromatic coupling field and a weak probe field. When one component of the strong bichromatic coupling field is resonant with a corresponding transition and the other is detuning with an integer fraction of the Rabi frequency of the resonant field, the absorption spectrum exhibits a series of symmetrical doublets. While two frequencies of the strong bichromatic coupling field are symmetrically detuned from the transition, the position and the relative intensity of the absorption peak are both affected by the coupling field intensity and detuning. An explanation of the spectrum is given in term of the dressed-state formalism.

Key words: three-level system, bichromatic coupling field, dressed state, quantum coherence

中图分类号: 

  • 42.50.Ar
42.50.Md (Optical transient phenomena: quantum beats, photon echo, free-induction decay, dephasings and revivals, optical nutation, and self-induced transparency)