Implementation of a Nondeterministic Optical Noiseless Amplifier

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Title Implementation of a Nondeterministic Optical Noiseless Amplifier
Author Ferreyrol, Franck Michel; Barbieri, Marco; Blandino, Rémi; Fossier, Simon; Tualle-Brouri, Rosa; Grangier, Philippe
Journal Name Physical Review Letters
Year Published 2010
Place of publication United-States
Publisher American Physical Society
Abstract Quantum mechanics imposes that any amplifier that works independently on the phase of the input signal has to introduce some excess noise. The impossibility of such a noiseless amplifier is rooted in the unitarity and linearity of quantum evolution. A possible way to circumvent this limitation is to interrupt such evolution via a measurement, providing a random outcome able to herald a successful—and noiseless—amplification event. Here we show a successful realization of such an approach; we perform a full characterization of an amplified coherent state using quantum homodyne tomography, and observe a strong heralded amplification, with about a 6 dB gain and a noise level significantly smaller than the minimal allowed for any ordinary phase-independent device.
Peer Reviewed Yes
Published Yes
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Copyright Statement Copyright 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.
Volume 104
Issue Number 12
Page from 123603-1
Page to 123603-4
ISSN 0031-9007
Date Accessioned 2011-12-01
Language en_US
Faculty Faculty of Science, Environment, Engineering and Technology
Subject Quantum Information, Computation and Communication; Quantum Optics; Quantum Physics
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1x

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