title: Hyperentangled mixed phased Dicke states: optical design and detection.
abstract: A recently introduced family of multipartite entangled states, the 4-qubit phased Dicke states, has been created by 2-photon hyperentanglement. Our experimental method allows high state fidelity and generation rate. By introducing quantum noise in the multipartite system in a controlled way, we have tested the robustness of these states. To this purpose the entanglement of the resulting multipartite entangled mixed states has been verified by using a new kind of structural witness.
authors.affiliation: Dipartimento di Fisica, Sapienza Universitá di Roma, I-00185 Roma, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Chiuri
authors.forename: G
authors.initials: G
authors.lastname: Vallone
authors.forename: N
authors.initials: N
authors.lastname: Bruno
authors.forename: C
authors.initials: C
authors.lastname: Macchiavello
authors.forename: D
authors.initials: D
authors.lastname: Bruss
authors.forename: P
authors.initials: P
authors.lastname: Mataloni