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-Gaussianity of quantum states : an experimental test on single-photon-added coherent states / M. Barbieri, N. Spagnolo, M. G. Genoni, F. Ferreyrol, R. Blandino, M. Paris, P. Grangier, R. Tualle-Brouri. - In: PHYSICAL REVIEW A. - ISSN 1050-2947. - 82:6(2010), pp. 063833.063833.1-063833.063833.5.
Non-Gaussianity of quantum states : an experimental test on single-photon-added coherent states
M. G. Genoni;M. Paris;
2010
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.File | Dimensione | Formato | |
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