Photon-number-state generation with a single two-level atom in a cavity: a proposal P. Domokos, M. Brune, J. M. Raimond and S. Haroche Eur. Phys. J. D, 1 1 (1998) 1-4 Published online: 15 January 1998 DOI: 10.1007/s100530050056