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  • Quantum Walks of Correlated Photon Pairs in Two-Dimensional Waveguide Arrays

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    Author(s)
    Poulios, Konstantinos
    Keil, Robert
    Fry, Daniel
    Meinecke, Jasmin D. A.
    Matthews, Jonathan C. F.
    Politi, Alberto
    Lobino, Mirko
    Gräfe, Markus
    Heinrich, Matthias
    Nolte, Stefan
    Szameit, Alexander
    O’Brien, Jeremy L.
    Griffith University Author(s)
    Lobino, Mirko
    Year published
    2014
    Metadata
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    Abstract
    We demonstrate quantum walks of correlated photons in a two-dimensional network of directly laser written waveguides coupled in a "swiss cross" arrangement. The correlated detection events show high-visibility quantum interference and unique composite behavior: strong correlation and independence of the quantum walkers, between and within the planes of the cross. Violations of a classically defined inequality, for photons injected in the same plane and in orthogonal planes, reveal nonclassical behavior in a nonplanar structure.We demonstrate quantum walks of correlated photons in a two-dimensional network of directly laser written waveguides coupled in a "swiss cross" arrangement. The correlated detection events show high-visibility quantum interference and unique composite behavior: strong correlation and independence of the quantum walkers, between and within the planes of the cross. Violations of a classically defined inequality, for photons injected in the same plane and in orthogonal planes, reveal nonclassical behavior in a nonplanar structure.
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    Journal Title
    Physical Review Letters
    Volume
    112
    DOI
    https://doi.org/10.1103/PhysRevLett.112.143604
    Copyright Statement
    © 2014 American Physical Society. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.
    Subject
    Mathematical sciences
    Physical sciences
    Quantum information, computation and communication
    Quantum optics and quantum optomechanics
    Engineering
    Publication URI
    http://hdl.handle.net/10072/63729
    Collection
    • Journal articles

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