title: Deterministic and storable single-photon source based on a quantum memory.
abstract: A single-photon source is realized with a cold atomic ensemble (87Rb atoms). A single excitation, written in an atomic quantum memory by Raman scattering of a laser pulse, is retrieved deterministically as a single photon at a predetermined time. It is shown that the production rate of single photons can be enhanced considerably by a feedback circuit while the single-photon quality is conserved. Such a single-photon source is well suited for future large-scale realization of quantum communication and linear optical quantum computation.
authors.affiliation: Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Philosophenweg 12, 69120 Heidelberg, Germany.
authors.forename: Shuai
authors.initials: S
authors.lastname: Chen
authors.forename: Yu-Ao
authors.initials: YA
authors.lastname: Chen
authors.forename: Thorsten
authors.initials: T
authors.lastname: Strassel
authors.forename: Zhen-Sheng
authors.initials: ZS
authors.lastname: Yuan
authors.forename: Bo
authors.initials: B
authors.lastname: Zhao
authors.forename: Jörg
authors.initials: J
authors.lastname: Schmiedmayer
authors.forename: Jian-Wei
authors.initials: JW
authors.lastname: Pan