title: Spectral multiplexing for scalable quantum photonics using an atomic frequency comb quantum memory and feed-forward control.
abstract: Future multiphoton applications of quantum optics and quantum information science require quantum memories that simultaneously store many photon states, each encoded into a different optical mode, and enable one to select the mapping between any input and a specific retrieved mode during storage. Here we show, with the example of a quantum repeater, how to employ spectrally multiplexed states and memories with fixed storage times that allow such mapping between spectral modes. Furthermore, using a Ti:Tm:LiNbO_{3} waveguide cooled to 3 K, a phase modulator, and a spectral filter, we demonstrate storage followed by the required feed-forward-controlled frequency manipulation with time-bin qubits encoded into up to 26 multiplexed spectral modes and 97% fidelity.
authors.affiliation: Institute for Quantum Science and Technology, and Department of Physics & Astronomy, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2 N 1N4, Canada.
authors.forename: Neil
authors.initials: N
authors.lastname: Sinclair
authors.affiliation: Institute for Quantum Science and Technology, and Department of Physics & Astronomy, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2 N 1N4, Canada.
authors.forename: Erhan
authors.initials: E
authors.lastname: Saglamyurek
authors.affiliation: Institute for Quantum Science and Technology, and Department of Physics & Astronomy, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2 N 1N4, Canada.
authors.forename: Hassan
authors.initials: H
authors.lastname: Mallahzadeh
authors.affiliation: Institute for Quantum Science and Technology, and Department of Physics & Astronomy, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2 N 1N4, Canada.
authors.forename: Joshua A
authors.initials: JA
authors.lastname: Slater
authors.affiliation: Department of Physics - Applied Physics, University of Paderborn, Warburger Straße 100, 33095 Paderborn, Germany.
authors.forename: Mathew
authors.initials: M
authors.lastname: George
authors.affiliation: Department of Physics - Applied Physics, University of Paderborn, Warburger Straße 100, 33095 Paderborn, Germany.
authors.forename: Raimund
authors.initials: R
authors.lastname: Ricken
authors.affiliation: Institute for Quantum Science and Technology, and Department of Physics & Astronomy, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2 N 1N4, Canada.
authors.forename: Morgan P
authors.initials: MP
authors.lastname: Hedges
authors.affiliation: Institute for Quantum Science and Technology, and Department of Physics & Astronomy, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2 N 1N4, Canada.
authors.forename: Daniel
authors.initials: D
authors.lastname: Oblak
authors.affiliation: Institute for Quantum Science and Technology, and Department of Physics & Astronomy, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2 N 1N4, Canada.
authors.forename: Christoph
authors.initials: C
authors.lastname: Simon
authors.affiliation: Department of Physics - Applied Physics, University of Paderborn, Warburger Straße 100, 33095 Paderborn, Germany.
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Sohler
authors.affiliation: Institute for Quantum Science and Technology, and Department of Physics & Astronomy, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2 N 1N4, Canada.
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Tittel