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Chin. Phys. B, 2012, Vol. 21(2): 023701    DOI: 10.1088/1674-1056/21/2/023701
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Demonstration of the approximation of eliminating atomic excited populations in an atom–cavity system

Zhang Yu-Qinga,Huang Ganga,Tan Leia b
1. Institute of Theoretical Physics, Lanzhou University, Lanzhou 730070, China;
2. Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, China
Abstract  Using the master equation approach to a V-type three-level atom inside a high-finesse single-mode cavity in the strong coupling condition, we demonstrate the approximation of eliminating populations of atomic excited states, which is widely used in the field of the atom-cavity systems [Hechenblaikner G, Gangl M, Horak P and Ritsch H 1998 Phys. Rev. A 58 3030]; Liu L W, Tan T and Xu Y 2008 J. Mod. Opt. 56 968; Cho J, Angelakis D G and Bose S 2008 Phys. Rev. A 78 062338. This is reflected in the deviation of the population δ, of which the value is 10-3~10-2. We further find the deviation of the dipole force and demonstrate that the deviation of atomic population will not notably affect the dipole force of the atom in the strong coupling condition. A relevant experimental case is also presented.
Keywords:  V-type three-level atom      high finesse optical cavity      dipole force      strong coupling condition  
Received:  08 January 2011      Revised:  30 June 2011      Published:  30 January 2012
PACS:  37.30.+i (Atoms, molecules, andions incavities)  
  42.50.Ct (Quantum description of interaction of light and matter; related experiments)  
  42.50.Ar  
  42.50.Wk (Mechanical effects of light on material media, microstructures and particles)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 10704031) and the Fundamental Research Funds for the Central Universities, China (Grant No. lzujbky-2010-75).
Corresponding Authors:  Tan Lei,tanlei@lzu.edu.cn     E-mail:  tanlei@lzu.edu.cn

Cite this article: 

Zhang Yu-Qing,Huang Gang,Tan Lei Demonstration of the approximation of eliminating atomic excited populations in an atom–cavity system 2012 Chin. Phys. B 21 023701

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