Pohl, T. Max Planck Institute for the Physics of Complex Systems, Max Planck Society;
Peyronel, T., Firstenberg, O., Liang, Q. Y., Hofferberth, S., Gorshkov, A. V., Pohl, T., et al. (2012). Quantum nonlinear optics with single photons enabled by strongly interacting atoms. Nature, 488(7409), 57-60. doi:10.1038/nature11361.