[1] D. F. Walls, Nature 306, 141 (1983).
[2] D. J. Wineland, J. J. Bollinger, W. M. Itano, and D. J. Heinzen, Phys. Rev. A 50, 67 (1994).
[3] X. Li, D. L. Lin, T. F. George, and Z. Liu, Phys. Rev. A 40, 228 (1989).
[4] Z. Liu, X. Li, D. L. Lin, and T. F. George, Phys. Rev. A 44, 6144 (1991).
[5] M. Ren, Y. Qian, Z. Liu, A. Ma, D. Kang, and S. Liu, Chinese J. Lasers (in Chinese) 35, 1228 (2008).
[6] P. Meystre and M. S. Zubairy, Phys. Lett. A 89, 390 (1982).
[7] P. L. Knight, Phys. Scr. 12, 51 (1986).
[8] G. Compagno, J. S. Peng, and F. Persico, Opt. Commun. 57, 415 (1986).
[9] M. H. Mahran, A.-R. A. El-Samman, and A.-S. F. Obada, J. Mod. Opt. 36, 53 (1989).
[10] A. Zhu, S. Zhang, and Y. Zhao, Chin. Phys. 14, 1152 (2005).
[11] M. Hillery, Phys. Rev. A 39, 1556 (1989).
[12] H. Wu and W. Su, Chin. Phys. 16, 106 (2007).
[13] S. Ye, Commun. Theor. Phys. 45, 147 (2006).
[14] Z. Zhong and W. Su, Commun. Theor. Phys. 49, 221 (2008).
[15] C. C. Gerry and H. Ghosh, Phys. Lett. A 229, 17 (1997).