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Entanglement of arbitrary superpositions of modes within two-dimensional orbital angular momentum state spaces

Jack, B. and Yao, A. M. and Leach, J. and Romero, J. and Franke-Arnold, S. and Ireland, D. G. and Barnett, S. M. and Padgett, M. J. (2010) Entanglement of arbitrary superpositions of modes within two-dimensional orbital angular momentum state spaces. Physical Review A, 81 (4). 043844. ISSN 1050-2947

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    Abstract

    We use spatial light modulators (SLMs) to measure correlations between arbitrary superpositions of orbital angular momentum (OAM) states generated by spontaneous parametric down-conversion. Our technique allows us to fully access a two-dimensional OAM subspace described by a Bloch sphere, within the higher-dimensional OAM Hilbert space. We quantify the entanglement through violations of a Bell-type inequality for pairs of modal superpositions that lie on equatorial, polar, and arbitrary great circles of the Bloch sphere. Our work shows that SLMs can be used to measure arbitrary spatial states with a fidelity sufficient for appropriate quantum information processing systems.

    Item type: Article
    ID code: 26770
    Keywords: hidden-variable thesis, bell-inequality, quantum entanglement, local theories, light, photons, violation, theorem, Physics, Atomic and Molecular Physics, and Optics
    Subjects: Science > Physics
    Department: Faculty of Science > Physics
    Related URLs:
    Depositing user: Miss Leonie Airley
    Date Deposited: 17 Aug 2010 11:18
    Last modified: 27 Mar 2014 11:16
    URI: http://strathprints.strath.ac.uk/id/eprint/26770

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