Scientific Results

Experimental Realization of Optimal Noise Estimation for a General Pauli Channel

Year: 2011

Authors: Chiuri A., Rosati V., Vallone G., Pádua S., Imai H., Giacomini S., Macchiavello C., Mataloni P.

Autors Affiliation: Dipartimento di Fisica, Sapienza Universita` di Roma, Piazzale Aldo Moro 5, I-00185 Roma, Italy; Istituto Nazionale di Ottica (INO-CNR), Largo Enrico Fermi 6, I-50125 Firenze, Italy; Department of Information Engineering, University of Padova, I-35131 Padova, Italy; Departamento de Fı´sica, Universidade Federal de Minas Gerais, Caixa Postal 702, Belo Horizonte, MG 30123-970, Brazil; Dipartimento di Fisica ‘‘A. Volta’’ and INFN-Sezione di Pavia, via Bassi 6, 27100 Pavia, Italy

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.

Journal/Review: PHYSICAL REVIEW LETTERS

Volume: 107 (25)      Pages from: 253602  to: 253602

More Information: This work was supported by EU-Projects CHISTERA-QUASAR and CORNER, by the CNR project Hilbert, and by the FARI project 2010 of Sapienza Universita di Roma. G. V. was partially supported by the Strategic-Research-Project QUINTET of the Department of Information Engineering, University of Padova and the Strategic-Research-Project QUANTUMFUTURE of the University of Padova. S. P. was supported by CNPq, FAPEMIG, INCT-quantum information, and ItalianBrazilian Contract CNR-CNPq (Quantum information in a high dimension Hilbert space).
DOI: 10.1103/PhysRevLett.107.253602

Citations: 32
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