A.
S.
Zibrov
Hong, T. ., Gorshkov, A. V., Patterson, D. ., Zibrov, A. S., Doyle, J. M., Lukin, M. D., & Prentiss, M. G. (2009). Realization of coherent optically dense media via buffer-gas cooling. Physical Review A, 79. http://doi.org/10.1103/PhysRevA.79.013806