Multiparty multilevel energy-time entanglement

Year: 2010

Authors: Vallone G., Mataloni P., Cabello A.

Autors Affiliation: Museo Storico della Fisica e Centro Studi e Ricerche Enrico Fermi, Via Panisperna 89/A, Compendio del Viminale, Roma I-00184, Italy; Dipartimento di Fisica, Università Sapienza di Roma, Piazzale Aldo Moro 5, I-00185 Roma, Italy;
Istituto Nazionale di Ottica Applicata (INO-CNR), L.go E. Fermi 6, I-50125 Florence, Italy;
Departamento de Fısica Aplicada II, Universidad de Sevilla, E-41012 Sevilla, Spain

Abstract: Franson-like setups are inadequate for multiparty Bell experiments with energy-time entanglement because postselected events can depend on the local settings, and local models can exploit this feature to reproduce the quantum predictions, even in the case of ideal devices. We extend a previously introduced interferometric scheme [A. Cabello et al., Phys. Rev. Lett. 102, 040401 (2009)] to solve this problem in the N-qubit and N-quNit cases. In addition, the proposed setups allow us to prepare and test N-qubit Greenberger-Horne-Zeilinger and (Sigma(N)(i=1) vertical bar i … i) /root N energy-time entangled states.

Journal/Review: PHYSICAL REVIEW A

Volume: 81 (3)      Pages from: 32105-1  to: 32105-6

More Information: We thank J. Franson, J.-A. Larsson, and M. Zukowski for useful conversations. This work was supported by the Spanish Ministry of Science and Innovation’s Project No. FIS2008-05596, from the Junta de Andalucia’s Excellence Project No. P06-FQM-02243, and by Finanziamento Ateneo 07 Sapienza Universita di Roma.
KeyWords: quantum mechanics; multiport beam-splitters;
DOI: 10.1103/PhysRevA.81.032105

Citations: 5
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