title: Collective light emission revisited: reservoir induced coherence.
abstract: We study the collective emission of a few emitters (up to three) in a cavity. In addition to the radiation coupling responsible for sub- and superradiance, we investigate emitters additionally coupled through a joint carrier reservoir. For such emitters, typically embedded in a solid state environment, the carrier reservoir provides a continuous pumping mechanism for the steady state emission. We show that the statistical properties of the emitted light depend strongly on the interaction between the emitters and the reservoir. Unexpectedly, the presence of the reservoir enhances the coherence of the emitted light already for a few emitters. This results from the fact that the carrier reservoir introduces new many-body correlations to the electronic transition and in this way suppresses multiphoton processes.
authors.affiliation: Institut für Festkörperphysik, Technische Universität Berlin, Hardenbergstraße 36, 10623 Berlin, Germany and DSO National Laboratories, 20 Science Park Drive, Singapore 118230, Singapore.
authors.forename: Yumian
authors.initials: Y
authors.lastname: Su
authors.affiliation: Institut für Festkörperphysik, Technische Universität Berlin, Hardenbergstraße 36, 10623 Berlin, Germany.
authors.forename: Dieter
authors.initials: D
authors.lastname: Bimberg
authors.affiliation: Institut für Theoretische Physik, Nichtlineare Optik und Quantenelektronik, Technische Universität Berlin, Hardenbergstraße 36, 10623 Berlin, Germany.
authors.forename: Andreas
authors.initials: A
authors.lastname: Knorr
authors.affiliation: Institute for Quantum Optics and Quantum Information, 6020 Innsbruck, Austria.
authors.forename: Alexander
authors.initials: A
authors.lastname: Carmele