[1] Anderson P W 1958 Phys. Rev. 109 1492

[2] Fisher M P A, Weichman P B, Grinstein G and Fisher D S
1989 Phys. Rev. B 40 546

[3] Bloch I, Dalibard J and Zwerger W 2008 Rev. Mod.
Phys. 80 885

[4] Courteille P, Freeland R S, Heinzen D J, van Abeelen F A
and Verhaar B J 1998 Phys. Rev. Lett. 81 69

[5] Inouye S, Andrews M R, Stenger J, Miesner H J,
Stamper-Kurn D M and Ketterle W 1998 Nature 392 151

[6] Greiner M, Mandel O, Esslinger T, Hansch T W and Bloch I
2002 Nature 415 39

[7] Billy J, Josse V, Zuo Z C, Bernard A, Hambrecht B, Lugan
P, Clement D, Sanchez-Palencia L, Bouyer P and Aspect A 2008
Nature 453 891

[8] Roati G, D'Errico C, Fallani L, Fattori M, Fort C,
Zaccanti M, Modugno G, Modugno M and Inguscio M 2008 Nature
453 895

[9] Anderson B P and Kasevich M A 1998 Science 282
1686

[10] Dalfovo F, Giorgini S, Pitaevskii L P and Stringari S
1999 Rev. Mod. Phys. 71 463

[11] Liu W M, Fan W B, Zheng W M, Liang J Q and Chui S T 2002
Phys. Rev. Lett. 88 170408

[12] Wu B and Niu Q 2000 Phys. Rev. A 61 023402

[13] Edwards E E, Beeler M, Hong T and Rolston S L 2008
Phys. Rev. Lett. 101 260402

[14] Denschlag J H, Simsarian J E, Haffner H, McKenzie C,
Browaeys A, Cho D, Helmerson K, Rolston S L and Phillips W D 2002
J. Phys. B: At. Mol. Opt. Phys. 35 3095