[1] [1] O A Kocharovskaya, Y I Khanin. Coherent amplification of an ultrashort pulse in a three-level medium without a population inversion [J]. Soriet J Theor Exp Phys Lett, 1988, 48: 630-634.

[2] [2] S E Harris. Lasers without inversion-interference of lifetime-broadened resonances [J]. Phys Rev Lett, 1989, 62: 1033-1036.

[3] [3] K J Boller, A Imamolu, S E Harris. Observation of electromagnetically induced transparency [J]. Phys Rev Lett, 1991, 66(20): 2593-2596.

[4] [4] S A Hopkins, E Usadi, H X Chen, et al.. Electromagnetically induced transparency of laser-cooled rubidium atoms in three-level Λ-type systems [J]. Opt Commun, 1997, 138(1): 185-192.

[5] [5] Y Zhao, C Wu, B S Ham, et al.. Microwave induced transparency in ruby [J]. Phys Rev Lett, 1997, 79(4): 641-644.

[6] [6] H Schmidt, A Imamoglu. Nonlinear optical devices based on a transparency in semiconductor intersubband transitions [J]. Opt Commun, 1996, 131(4): 333-338.

[7] [7] M Fleischhauer, M D Lukin. Dark-State polaritons in electromagnetically induced transparency [J]. Phys Rev Lett, 2000, 84(22): 5094-5097.

[8] [8] M Fleischhauer, M D Lukin. Quantum memory for photons: dark-state polaritons [J]. Phys Rev A, 2002, 65(2): 022314.

[9] [9] M D Lukin, S F Yelin, M Fleischhauer. Entanglement of atomic ensembles by trapping correlated photon states [J]. Phys Rev Lett, 2000, 84(18): 4232-4235.

[10] [10] C Liu, Z Dutton, C H Bohroozi, et al.. Observation of coherent optical information storage in an atomic medium using halted light pulses [J]. Nature, 2001, 409(6819): 490-493.

[11] [11] D F Phillips, A Fleischhauer, A Mair, et al.. Storage of light in atomic vapor [J]. Phys Rev Lett, 2001, 86(5): 783-786.

[12] [12] J Appel, E Figueroa, D Korystov, et al.. Quantum memory for squeezed light [J]. Phys Rev Lett, 2008, 100(9): 093602.

[13] [13] K Honda, D Akamatsu, M Arikawa, et al.. Storage and retrieval of a squeezed vacuum [J]. Phys Rev Lett, 2008, 100(9): 093601.

[14] [14] H G Robinson. Experimental demonstration of laser oscillation without population inversion via quantum interference in Rb [J]. Phys Rev Lett, 1995, 75(8): 1499-1502.

[15] [15] H Wu, M Xiao, J Gea-Banacloche. Evidence of lasing without inversion in a hot rubidium vapor under electromagnetically-induced-transparency conditions [J]. Phys Rev A, 2008, 78(4): 041802(R).

[16] [16] A Imamolu, S E Harris. Lasers without inversion: interference of dressed lifetime-broadened states [J]. Opt Lett, 1989, 14(24): 1344-1346.

[17] [17] M T L Hsu, G Hétet, O Glockl, et al.. Quantum study of information delay in electromagnetically induced transparency [J]. Phys Rev Lett, 2006, 97(18): 183601.

[18] [18] Junxiang Zhang, Jin Cai, Yunfei Bai, et al.. Optimization of the noise property of delayed light in electromagnetically induced transparency [J]. Phys Rev A, 2007, 76(3): 033814.

[19] [19] Yanhong Xiao, Tun Wang, Maria Baryakhtar, et al.. Electromagnetically induced transparency with noisy lasers [J]. Phys Rev A, 2009, 80(4): 041805(R).

[20] [20] Lei Feng, Pengxiong Li, Tun Wang, et al.. Transition linewidth of cross-correlations in random intensity fluctuations in EIT [J]. arXiv:1303.1602v2, 2013.

[21] [21] Li Yuan. The Study of Quantum Noise of Optical Field in EIT Medium [D]. Taiyuan: Shanxi University, 2013. 36-50.