title: Deutsch-jozsa algorithm using triggered single photons from a single quantum dot.
abstract: We demonstrate a two-qubit Deutsch-Jozsa algorithm with single photons from a single InP quantum dot. The qubits are implemented via the spatial mode and the polarization of a single photon. Our photon source is operated both under continuous and pulsed excitation, the latter allowing deterministic quantum logic by generating photons on demand with a strong suppression of two-photon events. The computation reached a success probability of up to 79%. We also exploit the concept of decoherence-free subspaces that helps to make our experimental setup robust against sources of phase noise.
authors.affiliation: Physics Department, Nano-Optics, Humboldt-University Berlin, Hausvogteiplatz 5-7, D-10117 Berlin, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Scholz
authors.forename: T
authors.initials: T
authors.lastname: Aichele
authors.forename: S
authors.initials: S
authors.lastname: Ramelow
authors.forename: O
authors.initials: O
authors.lastname: Benson