title: Photon-number selective group delay in cavity induced transparency.
abstract: We show that the group velocity of a probe pulse in an ensemble of Λ-type atoms driven by a quantized cavity mode depends on the quantum state-of-the input probe pulse. In the strong-coupling regime of the atom-cavity system the probe group delay is photon-number selective. This can be used to spatially separate the single photon from higher photon-number components of a few-photon probe pulse and thus create a deterministic single-photon source.
authors.affiliation: Department of Physics and Research Center OPTIMAS, University of Kaiserslautern, Erwin-Schrödinger-Strasse, D-67663 Kaiserslautern, Germany.
authors.forename: Gor
authors.initials: G
authors.lastname: Nikoghosyan
authors.forename: Michael
authors.initials: M
authors.lastname: Fleischhauer