[2] Morsch O, Oberthaler M. Dynamics of Bose-Einstein condensates in optical lattices [J]. Rev. Mod. Phys., 2006, 78(1): 179-215.
[6] Tan L, Zhang Cuiling, Zhang Jinfang, et al. Laser cooling, friction and diffusion in three-level cascade system in squeezed vacuum [J]. J. Phys. Soc. Jpn., 2006, 75(9): 094301.
[7] Tan L, Zhong C K, Zhang C L, et al. Two-photon Doppler cooling of rubidium atoms to the recoil limit using cascade transitions [J]. Chin. J. Phys., 2006, 44(3): 214-223.
[8] Magno W, Cavasso F R, Cruz F C. Two-photon Doppler cooling of alkaline-earth-metal and ytterbium atoms [J]. Phys. Rev. A, 2003, 67(4): 043407.
[9] Morigi G, Arimondo E. Two-photon and electromagnetically induced transparency assisted Doppler cooling in a three-level cascade system [J]. Phys. Rev. A, 2008, 75(5): 051404(R).
[10] Malossi N, Damkjer S, Hansen P L, et al. Two-photon cooling of magnesium atoms[J]. Phys. Rev. A, 2005, 72(5): 051403(R).
[11] Metcalf H J, Van der Straten P. Laser Cooling and Trapping [M]. New York: Springer-Verlag, 1999. 50-60.