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  • Non-Gaussianity of quantum states: An experimental test on single-photon-added coherent states

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    Author(s)
    Barbieri, Marco
    Spagnolo, Nicolò
    G. Genoni, Marco
    Ferreyrol, Franck
    Blandino, Rémi
    G. A. Paris, Matteo
    Grangier, Philippe
    Tualle-Brouri, Rosa
    Griffith University Author(s)
    Ferreyrol, Franck M.
    Year published
    2010
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    Abstract
    Non-Gaussian states and processes are useful resources in quantum information with continuous variables. An experimentally accessible criterion has been proposed to measure the degree of non-Gaussianity of quantum states based on the conditional entropy of the state with a Gaussian reference. Here we adopt such a criterion to characterize an important class of nonclassical states: single-photon-added coherent states. Our studies demonstrate the reliability and sensitivity of this measure and use it to quantify how detrimental is the role of experimental imperfections in our implementation.Non-Gaussian states and processes are useful resources in quantum information with continuous variables. An experimentally accessible criterion has been proposed to measure the degree of non-Gaussianity of quantum states based on the conditional entropy of the state with a Gaussian reference. Here we adopt such a criterion to characterize an important class of nonclassical states: single-photon-added coherent states. Our studies demonstrate the reliability and sensitivity of this measure and use it to quantify how detrimental is the role of experimental imperfections in our implementation.
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    Journal Title
    Physical Review A
    Volume
    82
    Issue
    6
    DOI
    https://doi.org/10.1103/PhysRevA.82.063833
    Copyright Statement
    © 2010 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
    Quantum Information, Computation and Communication
    Quantum Optics
    Quantum Physics not elsewhere classified
    Mathematical Sciences
    Physical Sciences
    Chemical Sciences
    Publication URI
    http://hdl.handle.net/10072/42809
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    • Journal articles

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