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  • Implementation of a Nondeterministic Optical Noiseless Amplifier

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    Author(s)
    Ferreyrol, Franck
    Barbieri, Marco
    Blandino, Rémi
    Fossier, Simon
    Tualle-Brouri, Rosa
    Grangier, Philippe
    Griffith University Author(s)
    Ferreyrol, Franck M.
    Year published
    2010
    Metadata
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    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 ...
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    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.
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    Journal Title
    Physical Review Letters
    Volume
    104
    Issue
    12
    DOI
    https://doi.org/10.1103/PhysRevLett.104.123603
    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
    Engineering
    Publication URI
    http://hdl.handle.net/10072/42825
    Collection
    • Journal articles

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