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Experimental Entanglement and Nonlocality of a Two-Photon Six-Qubit Cluster State

Source: Phys. Rev. Lett. 103, 160401 (2009); doi:10.1103/PhysRevLett.103.160401

Published 13 October 2009

EPAPS
PACS
  • 03.67.Bg
    Entanglement production and manipulation (quantum information)
  • 03.65.Ud
    Entanglement and quantum nonlocality
  • 42.50.Ex
    Optical implementations of quantum information processing and transfer
  • 42.65.Lm
    Parametric down conversion and production of entangled photons
  • YEAR: 2009
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PUBLICATION DATA
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Raino Ceccarelli,1 Giuseppe Vallone,2,1 Francesco De Martini,1,3 Paolo Mataloni,1 and Adán Cabello4
1Dipartimento di Fisica della “Sapienza” Università di Roma, Roma 00185, Italy and Consorzio Nazionale Interuniversitario per le Scienze Fisiche della Materia, Roma 00185, Italy
2Centro Studi e Ricerche “Enrico Fermi”, via Panisperna 89/A, Compendio del Viminale, Roma 00184, Italy
3Accademia Nazionale dei Lincei, via della Lungara 10, Roma 00165, Italy
4Departamento de Física Aplicada II, Universidad de Sevilla, E-41012 Sevilla, Spain
We create a six-qubit linear cluster state by transforming a two-photon hyperentangled state in which three qubits are encoded in each particle, one in the polarization and two in the linear momentum degrees of freedom. For this state, we demonstrate genuine six-qubit entanglement, persistency of entanglement against the loss of qubits, and higher violation than in previous experiments on Bell inequalities of the Mermin type. ©2009 The American Physical Society
History: Received 4 May 2009; published 13 October 2009
Permalink: http://link.aps.org/abstract/PRL/v103/e160401

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