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)
Year published
2010
Metadata
Show full item recordAbstract
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
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