Temporal and spectral evolution of an interrupted virtual single-photon transition: creation of optical gain and lossJens Herrmann, Matthias Weger, Reto Locher, Mazyar Sabbar, Paula Rivière, Ulf Saalmann, Jan-Michael Rost, Lukas Gallmann and Ursula KellerEPJ Web of Conferences, 41 (2013) 02024DOI: https://doi.org/10.1051/epjconf/20134102024