[1] [1] S. Ragy, G. Adesso, Sci. Rep. 2, 651 (2012).

[2] [2] M. Li, Y. Zhang, K. Luo, L. Wu, and H. Fan, Phys. Rev. A 87, 033813 (2013).

[3] [3] N. D. Hardy and J. H. Shapiro, Phys. Rev. A 87, 023820 (2013).

[4] [4] F. Ferri, D. Magatti, L. A. Lugiato, and A. Gatti, Phys. Rev. Lett. 104, 253603 (2010).

[5] [5] K. W. C. Chan, D. S. Simon, A. V. Sergienko, N. D. Hardy, J. H. Shapiro, Phys. Rev. A 84, 043807 (2011).

[6] [6] H. D. Hardy, Analyzing and Improving Image Quality in Reflective Ghost Imaging, S.M. thesis (Massachusetts Institute of Technology, 2011).

[7] [7] D. Duan, and Y. Xia, J. Opt. Soc. Am. A 31, 183-187 (2014).

[8] [8] Y. Li, H. Yang, J. Liu, L. Gong, Y. Sheng, W. Cheng, S. Zhao, Chin. Opt. Lett. 11, 021104 (2013).

[9] [9] W. Gong and S. Han, Opt. Lett. 36, 394-396 (2011).

[10] [10] P. Clemente, V. Dur'an, V. Torres-Company, E. Tajahuerce, and J. Lancis, Opt. Lett. 35, 2391-2393 (2010).

[11] [11] M. Bina, D. Magatti, M. Molteni, A. Gatti, L. A. Lugiato, and F. Ferri, Phys. Rev. Lett. 110, 083901 (2013).

[12] [12] B. I. Erkmen, J. H. Shapiro, Phys. Rev. A 79, 023833 (2009).

[13] [13] B. I. Erkmen, J. H. Shapiro, Phys. Rev. A 77, 043809 (2008).

[14] [14] D. S. Simon and A. V. Sergienko, Phys. Rev. A 82, 023819 (2010).

[15] [15] N. D. Hardy and J. H. Shapiro, Phys. Rev. A 84, 063824 (2011).

[16] [16] R. E. Meyers, K. S. Deacon, and Y. Shih, Appl. Phys. Lett. 98, 111115 (2010).

[17] [17] J. Cheng, Opt. Express 17, 7916 (2009).

[18] [18] K. W. C. Chan, D. S. Simon, A. V. Sergienko, N. D. Hardy, Phys. Rev. A 84, 043807 (2011).

[19] [19] D. Duan. S. Du. L. Yan, S. Jiang, Y. Liu, L. Zhang, and Y. Xia, Eur. Phys. J. D 68, 11 (2014).

[20] [20] D. Duan, S. Du, and Y. Xia, Phys. Rev. A 88, 053842 (2013).

[21] [21] B. Cao, C. Zhang, and P. Ou, Chin. Opt. Lett. 9, 081102 (2011).

[22] [22] D. Duan, Y. Xia, Chin. Opt. Lett, 10, 031102 (2012).

[23] [23] C. Wang, D. Zhang, Y. Bai, and B. Chen, Phys. Rev. A 82, 063814 (2010).

[24] [24] R. E. Meyers, K. S. Deacon, Y. H. Shih, J. Mod. Opt. 54, 2381 (2007)

[25] [25] C. Zhao, W. Gong, M. Chen, E. Li, H. Wang, W. Xu, and S. Han, Appl. Phys. Lett. 101, 141123 (2012).

[26] [26] W. Gong C. Zhao, J. Jiao, E. Li, arXiv:1301.5767.

[27] [27] H. P. Yuen and J. H. Shapiro, IEEE Trans. Inf. Theory 24, 657 (1978).

[28] [28] H. P. Yuen and J. H. Shapiro, IEEE Trans. Inf. Theory 26, 78 (1980).

[29] [29] J. H. Shapiro, Proc. SPIE 5111, 382 (2003).

[30] [30] J. H. Shapiro,B. A. Capron, and R. C. Harney, Appl. Opt. 20, 3292 (1981).

[31] [31] D. Duan, L. Zhang, and Y. Xia, J. Opt. Soc. Am. A 31, 730 (2014).

[32] [32] B. I. Erkmen, J. H. Shapiro, Adv. Opt. Photon. 2, 404 (2010).

[33] [33] H. Chen, T. Peng, and Y. Shih, Phys. Rev. A 88, 023808 (2013).