Symmetric excitation and de-excitation of a cavity QED systemOlafur Jonasson, Vidar Gudmundsson, Andrei Manolescu, Chi-Shung Tang and Hsi-Sheng GoanEur. Phys. J. B, 86 6 (2013) 291DOI: https://doi.org/10.1140/epjb/e2013-40330-x