[1] C. H. Bennett and D. P. Divincenzo, Nature 404, 247 (2000).
[2] H. Imai and M. Hayashi, Quantum Computation and Information (Springer, Berlin, 2006).
[3] S. B. Zheng, Phys. Rev. Lett. 95, 080502 (2005).
[4] H. Chen and J. Liu, Chin. Opt. Lett. 7, 440 (2009).
[5] J. Qian, X. Feng, and S. Gong, Chin. Opt. Lett. 5, 484 (2009).
[6] T. Yu and J. H. Eberly, Phys. Rev. Lett. 93, 140404 (2004).
[7] T. Yu and J. H. Eberly, Opt. Commun. 264, 393 (2006).
[8] M. Y¨ona c, T. Yu, and J. H. Eberly, J. Phys. B 39, S621 (2006).
[9] J. H. Eberly and T. Yu, Science 316, 555 (2007).
[10] P. Marek, J. Lee, and M. S. Kim, Phys. Rev. A 77, 032302 (2008).
[11] Y.-X. Gong, Y.-S. Zhang, Y.-L. Dong, X.-L. Niu, Y.-F. Huang, and G.-C. Guo, Phys. Rev. A 78, 042103 (2008).
[12] D. Tolkunov, V. Privman, and P. K. Aravind, Phys. Rev. A 71, 060308(R) (2005).
[13] J. P. Paz and A. J. Roncaglia, Phys. Rev. Lett. 100, 220401 (2008).
[14] F. Han and Y. Xia, Chin. Opt. Lett. 8, 231 (2009).
[15] M. P. Almeida, F. de Melo, M. Hor-Meyll, A. Salles, S. P. Walborn, P. H. Souto Ribeiro, and L. Davidovich, Science 316, 579 (2007).
[16] J. Laurat, K. S. Choi, H. Deng, C. W. Chou, and H. J. Kimble, Phys. Rev. Lett. 99, 180504 (2007).
[17] G. Jaeger and K. Ann, Phys. Lett. A 372, 2212 (2008).
[18] Q. Yang, M. Yang, and Z.-L. Cao, Phys. Lett. A 372, 6843 (2008).
[19] C.-L. Luo, C.-G. Liao, and Z.-H. Chen, Opt. Commun. 283, 3168 (2010).
[20] Z.-B. Chen, J.-W. Pan, G. Hou, and Y.-D. Zhang, Phys. Rev. Lett. 88, 040406 (2002).
[21] C. Liao, Z. Chen, and C. Luo, Acta Phys. Sin. (in Chinese) 59, 214 (2010).
[22] M. Y¨ona c and J. H. Eberly, Opt. Lett. 33, 270 (2008).
[23] J. H. Eberly, N. B. Narozhny, and J. J. Sanchez-Mondragon, Phys. Rev. Lett. 44, 1323 (1980).
[24] S.-B. Zheng and G.-C. Guo, Phys. Rev. Lett. 85, 2392 (2000).
[25] J.-L. Guo, Y. Xia, and H.-S. Song, Chin. Phys. B 19, 010310 (2010).