title: Minimal state tomography of spatial qubits using a spatial light modulator.
abstract: We report minimal quantum state tomography with spatial qubits created by a pair of parametric down converted twin-photons passing through a double-slit. A novel experimental setup is used, which includes a Spatial Light Modulator, as a fundamental tool, to reconstruct the state density matrix. The theory needed to perform a minimal quantum tomography is described. The density matrix is experimentally obtained for the two-qubit photonic states in spatial variables.
authors.affiliation: Departamento de Física, Universidade Federal de Minas Gerais, caixa postal 702, 30123-970, Belo Horizonte, MG-Brazil.
authors.forename: W M
authors.initials: WM
authors.lastname: Pimenta
authors.forename: B
authors.initials: B
authors.lastname: Marques
authors.forename: M A D
authors.initials: MA
authors.lastname: Carvalho
authors.forename: M R
authors.initials: MR
authors.lastname: Barros
authors.forename: J G
authors.initials: JG
authors.lastname: Fonseca
authors.forename: J
authors.initials: J
authors.lastname: Ferraz
authors.forename: M Terra
authors.initials: MT
authors.lastname: Cunha
authors.forename: S
authors.initials: S
authors.lastname: Pádua