title: Conditional detection of pure quantum states of light after storage in a Tm-doped waveguide.
abstract: We demonstrate the conditional detection of time-bin qubits after storage in and retrieval from a photon-echo-based waveguide quantum memory. Each qubit is encoded into one member of a photon pair produced via spontaneous parametric down-conversion, and the conditioning is achieved by the detection of the other member of the pair. By performing projection measurements with the stored and retrieved photons onto different bases, we obtain an average storage fidelity of 0.885±0.020, which exceeds the relevant classical bounds and shows the suitability of our integrated light-matter interface for future applications of quantum information processing.
authors.affiliation: Institute for Quantum Information Science, and Department of Physics and Astronomy, University of Calgary, Calgary, Alberta, Canada.
authors.forename: Erhan
authors.initials: E
authors.lastname: Saglamyurek
authors.forename: Neil
authors.initials: N
authors.lastname: Sinclair
authors.forename: Jeongwan
authors.initials: J
authors.lastname: Jin
authors.forename: Joshua A
authors.initials: JA
authors.lastname: Slater
authors.forename: Daniel
authors.initials: D
authors.lastname: Oblak
authors.forename: Félix
authors.initials: F
authors.lastname: Bussières
authors.forename: Mathew
authors.initials: M
authors.lastname: George
authors.forename: Raimund
authors.initials: R
authors.lastname: Ricken
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Sohler
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Tittel