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. © 2010 The American Physical Society.
Non-Gaussianity of quantum states: An experimental test on single-photon-added coherent states / Marco, Barbieri; Spagnolo, Nicolo'; Marco G., Genoni; Ferreyrol, Franck; Remi, Blandino; Matteo G. A., Paris; Grangier, Philippe; Rosa Tualle, Brouri. - In: PHYSICAL REVIEW A. - ISSN 1050-2947. - 82:6(2010). [10.1103/physreva.82.063833]
Non-Gaussianity of quantum states: An experimental test on single-photon-added coherent states
SPAGNOLO, NICOLO';
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. © 2010 The American Physical Society.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
