中国物理B ›› 2012, Vol. 21 ›› Issue (2): 23201-023201.doi: 10.1088/1674-1056/21/2/023201

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张琴1,屈光辉1,唐远河1,金康2,纪卫莉1   

  • 收稿日期:2011-07-14 修回日期:2011-08-29 出版日期:2012-01-30 发布日期:2012-01-30
  • 通讯作者: 张琴,zhangqin@xaut.edu.cn E-mail:zhangqin@xaut.edu.cn

Subluminal to superluminal light propagation in a V-type three-level atomic system interacting with squeezed vacuum

Zhang Qin(张琴)a)†, Qu Guang-Hui(屈光辉)a), Tang Yuan-He(唐远河)a), Jin Kang(金康)b), and Ji Wei-Li(纪卫莉)a)   

  1. a. Department of Physics, Xi'an University of Technology, Xi'an 710054, China;
    b. Department of Physics, Northwest University, Xi'an 710069, China
  • Received:2011-07-14 Revised:2011-08-29 Online:2012-01-30 Published:2012-01-30
  • Contact: Zhang Qin,zhangqin@xaut.edu.cn E-mail:zhangqin@xaut.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 10874138).

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Abstract: We study the light propagation properties in a V-type three-level atomic system interacting with two independent broadband squeezed baths. Using the graphic method, the dependences of the absorption and the dispersion of the system on the coupling field strength, the incoherent pumping field strength and the intensity of the squeezed vacuum are analysed. The result shows that the probe pulse propagation can be changed from subluminal to superluminal speed.

Key words: squeezed vacuum, group velocity, superluminal propagation, subluminal propagation

中图分类号:  (Coherent control of atomic interactions with photons)

  • 32.80.Qk
37.10.Vz (Mechanical effects of light on atoms, molecules, and ions) 42.50.-p (Quantum optics) 42.50.Nn (Quantum optical phenomena in absorbing, amplifying, dispersive and conducting media; cooperative phenomena in quantum optical systems)