Scientific Results

Experimental Quantum Networking Protocols via Four-Qubit Hyperentangled Dicke States

Year: 2012

Authors: Chiuri A., Greganti C., Paternostro M., Vallone G., Mataloni P.

Autors Affiliation: Dipartimento di Fisica, Sapienza Universita` di Roma, Piazzale Aldo Moro 5, I-00185 Roma, Italy;
Centre for Theoretical Atomic, Molecular, and Optical Physics, School of Mathematics and Physics, Queen’s University, Belfast BT7 1NN, United Kingdom;
Department of Information Engineering, University of Padova, I-35131 Padova, Italy;
Istituto Nazionale di Ottica (INO-CNR), Largo Enrico Fermi 6, I-50125 Firenze, Italy

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.

Journal/Review: PHYSICAL REVIEW LETTERS

Volume: 109 (17)      Pages from: 173604  to: 1173604

More Information: We thank Valentina Rosati for the contribution given to the early stages of this work. This work was supported by EU-Project CHISTERA-QUASAR, PRIN 2009 and FIRB-Futuro in ricerca HYTEQ, and the UK EPSRC (EP/G004579/1).
DOI: 10.1103/PhysRevLett.109.173604

Citations: 26
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