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

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

[3]Raab E L, Prentiss M, Cable A, Chu S and Pritchard D E
1995 Phys. Rev. Lett. 59 2631

[4] Schmiedmayer J 1995 Phys. Rev. A 52 R13

[5] Kr\"{uger P, Luo X, Klein M W, Brugger K,
Haase A, Wildermuth S, Groth S, Bar-Joseph I, Folman R and
Schmiedmayer J 2003 Phys. Rev. Lett. 91 233201

[6] Castin Y and Dalibard J 1991 Europhys. Lett. 14 761

[7] Sinclair C D J, Curtis E A, Garcia I L,
Retter J A, Hall B V, Eriksson S, Sauer B E and Hinds E A 2005
Phys. Rev. A 72 031603(R)

[8] Xu L F, Yin J P and Wang Y Z 2001 Opt. Commun. 188 93

[9] Schumm T, Hofferberth S, Andersson L M, Wildermuth S, Groth
S, Bar-Joseph I, Schmiedmayer J and Kruger P 2005 Nature Phys.
1 57

[10] Zobay O and Garraway B M 2001 Phys. Rev. Lett. 86 1195

[11] Bergeman T, Erez G and Metcalf H J 1987 Phys. Rev. A
35 1535

[12] Zhang H C, Zhang P F, Xu X P, Han J R and Wang Y Z 2005 Chin.
Phys. Lett. 22 83

[13] Cohen-Tannoudji C and Haroche S 1966 C.R. Acad. Sci. (paris)
262 268

[14] Cohen-Tannoudji C and Haroche S 1968 C. R. Acad. Sci.
(paris) 30 125

[15] Yabuzaki T, Nakayama S, Murakami Y and Ogawa T 1974 Phys.
Rev. A 10 1955

[16] Lesanovsky I, Schumm T, Hofferberth S, Andersson L M,
Kr\"{uger P and Schmiedmayer J 2005 Physics /0510076

[17] Cohen-Tannoudji C, Dupont-Roc J, Grynberg G 1992
Atom--Photon Interactions (New York: Wiley)