title: Experimental quantum networking protocols via four-qubit hyperentangled Dicke states.
abstract: We report the experimental demonstration of two quantum networking protocols, namely quantum 1→3 telecloning and open-destination teleportation, implemented using a four-qubit register whose state is encoded in a high-quality two-photon hyperentangled Dicke state. The state resource is characterized using criteria based on multipartite entanglement witnesses. We explore the characteristic entanglement-sharing structure of a Dicke state by implementing high-fidelity projections of the four-qubit resource onto lower-dimensional states. Our work demonstrates for the first time the usefulness of Dicke states for quantum information processing.
authors.affiliation: Dipartimento di Fisica, Sapienza Università di Roma, Piazzale Aldo Moro 5, I-00185 Roma, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Chiuri
authors.forename: C
authors.initials: C
authors.lastname: Greganti
authors.forename: M
authors.initials: M
authors.lastname: Paternostro
authors.forename: G
authors.initials: G
authors.lastname: Vallone
authors.forename: P
authors.initials: P
authors.lastname: Mataloni