[1] [1] M. H. Anderson, J. R. Ensher, M. R. Matthews, C. E. Wieman, and E. A. Cornell, Science 269, 198 (1995).

[2] [2] K. B. Davis, M. O. Mewes, M. R. Andrews, N. J. van Druten, D. S. Durfee, D. M. Kurn, and W. Ketterle, Phys. Rev. Lett. 75, 3969 (1995).

[3] [3] M. O. Mewes, M. R. Andrews, D. S. Durfee, D. M. Kurn, C. G. Townsend, and W. Ketterle, Phys. Rev. Lett. 78, 582 (1997).

[4] [4] B. P. Anderson and M. A. Kasevich, Science 282, 1686 (1998).

[5] [5] C. P. Sun, H. Zhan, Y. X. Miao, and J. M. Li, Commun. Theor. Phys. 29, 161 (1998).

[6] [6] H. Jing, Y. A. Han, J. L. Chen, and Y. X. Miao, Chin. Phys. Lett. 17, 862 (2000).

[7] [7] H. Jing, J. L. Chen, and M. L. Ge, Phys. Rev. A 63, 15601 (2001).

[8] [8] H. Jing and M. L. Ge, Science in China A (in Chinese) 31, 725 (2001).

[9] [9] L. M. Kuang and Z. Y. Zeng, Chin. Phys. Lett. 15, 703 (1998).

[10] [10] H. Huang and S. Q. Li, Chin. Phys. Lett. 16, 9 (1999).

[11] [11] J. S. Peng and G. X. Li, Introduction of Modern Quantum Optics (in Chinese) (Science in China Press, Beijing, 1996).

[12] [12] G. J. Ni and S. Q. Chen, Advanced Quantum Mechanics (in Chinese) (Fudan University Press, Shanghai, 2000).