Quantum Optical State Comparison Amplifier

Eleftheriadou, Electra and Barnett, Steve and Jeffers, John (2013) Quantum Optical State Comparison Amplifier. Physical Review Letters, 111 (21). 213601. ISSN 0031-9007

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Abstract

It is a fundamental principle of quantum theory that an unknown state cannot be copied or, as a consequence, an unknown optical signal cannot be amplified deterministically and perfectly. Here we describe a protocol that provides nondeterministic quantum optical amplification in the coherent state basis with high gain and high fidelity and which does not use quantum resources. The scheme is based on two mature quantum optical technologies: coherent state comparison and photon subtraction. The method compares favorably with all previous nondeterministic amplifiers in terms of fidelity and success probability.

ORCID iDs

Eleftheriadou, Electra, Barnett, Steve and Jeffers, John ORCID logoORCID: https://orcid.org/0000-0002-8573-1675;
  • Item type:Article
    ID code:46042
    Dates:
    Date
    Event
    19 November 2013
    Published
    Keywords:Physics and Astronomy(all)
    Subjects:UNSPECIFIED
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:21 Nov 2013 09:48
    Last modified:19 Mar 2021 04:03
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/46042
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