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

Marco Barbieri 1 Nicolò Spagnolo 2 Marco G. Genoni Franck Ferreyrol 2 Rémi Blandino 2 Matteo G. A. Paris Philippe Grangier 1 Rosa Tualle-Brouri 2
1 Laboratoire Charles Fabry de l'Institut d'Optique / Optique quantique
LCFIO - Laboratoire Charles Fabry de l'Institut d'Optique
2 LCFIO - Laboratoire Charles Fabry de l'Institut d'Optique
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 criterion to characterise an important class of non classical 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 realisation.
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Submitted on : Tuesday, December 14, 2010 - 1:17:47 PM
Last modification on : Wednesday, September 16, 2020 - 5:40:35 PM

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Marco Barbieri, Nicolò Spagnolo, Marco G. Genoni, Franck Ferreyrol, Rémi Blandino, et al.. Non-Gaussianity of quantum states: an experimental test on single-photon added coherent states. Physical Review A, American Physical Society, 2010, 82, pp.063833. ⟨10.1103/PhysRevA.82.063833⟩. ⟨hal-00546533⟩

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