[1] Chu S and Wieman C 1989 J. Opt. Soc. Am. B 6 2020

Metcalf H and Van der Straten P 1994 Phys. Rep. 244 204

[2] Collins G P 1996 Phys. Today 49(3) 18

[3] Johnson K S, Thywissen J H, Dekker N H, Berggren K K, Chu A P,
Younkin R and Prentiss M 1998 Science 280 1583

Scully M O and Druhl K1982 Phys. Rev. A 25 2208

Boto A N, Kok P, Abrams D S, Braunstein S L, Williams C P and
Dowling J P 2000 Phys. Rev. Lett. 85 2733

Agarwal G S and Scully M O 2003 Opt. Lett. 28 462

[4] Kapale K T, Qamar S and Zubairy M S 2003 Phys. Rev. A
67 023805

[5] Storey P, Collett M and Walls D F 1992 Phys. Rev. Lett.
68 472

Storey P, Collett M and Walls D F 1993 Phys. Rev. A 47 405

Quadt R, Collett M and Walls D F 1995 Phys. Rev. Lett. 74 351

[6] Kien F L, Rempe G, Schleich W P and Zubairy M S 1997 Phys.
Rev. A 56 2972

[7] Marte M A M and Zoller P 1992 Appl. Phys. B: Photophys.
Laser Chem. 54 477

[8] Kunze S, Rempe G and Wilkens M 1994 Europhys. Lett.
27 115

Brune M, Harlche M, Lefevere V, Maimond J M and Zagury N 1990 Phys.
Rev. Lett. 65 976

[9] Kunze S, Dieckmann K and Rempe G 1997 Phys. Rev. Lett.
78 2038

[10] Thomas J E and Wang L J 1995 Phys. Rep. 262 311
and references therein

[11] Rudy P, Ejnisman R and Bigelow N P 1997 Phys. Rev. Lett.
78 4906

[12] Paspalakis E and Knight P L 2001 Phys. Rev. A 63
065802

[13] Herkommer A M, Schleich W P and Zubairy M S 1997 J. Mod.
Opt. 44 2507

[14] Qamar S, Zhu S Y and Zubairy M S 2000 Opt. Commun.
176 409

[15] Qamar S, Zhu S Y and Zubairy M S 2000 Phys. Rev. A
61 063806

[16] Liu C P, Gong S Q, Cheng D C, Fan X J and Xu Z Z 2006
Phys. Rev. A 73 025801

[17] Ghaffoor F, Qamar S and Zubairy M S 2002 Phys. Rev. A
65 043819

[18] Sahrai M, Tajalli H, Kapale K T and Zubairy M S 2005
Phys. Rev. A 72 013820

[19] Kapale K T and Zubairy M S 2006 Phys. Rev. A 73
023813

[20] Xu Q, Hu X M, Guo H J, Li J Y, Li X X and Shi W X 2006
Opt. Commun. 265 255

Xu J and Hu X M 2006 Chin. Phys. Lett. 23 2725

[21] Lax M 1968 Phys. Rev. 172 350