title: Experimental realization of optimal noise estimation for a general Pauli channel.
abstract: We present the experimental realization of the optimal estimation protocol for a Pauli noisy channel. The method is based on the generation of 2-qubit Bell states and the introduction of quantum noise in a controlled way on one of the state subsystems. The efficiency of the optimal estimation, achieved by a Bell measurement, is shown to outperform quantum process tomography.
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: V
authors.initials: V
authors.lastname: Rosati
authors.forename: G
authors.initials: G
authors.lastname: Vallone
authors.forename: S
authors.initials: S
authors.lastname: Pádua
authors.forename: H
authors.initials: H
authors.lastname: Imai
authors.forename: S
authors.initials: S
authors.lastname: Giacomini
authors.forename: C
authors.initials: C
authors.lastname: Macchiavello
authors.forename: P
authors.initials: P
authors.lastname: Mataloni