A high-gain and high-fidelity coherent statecomparison amplifier

Donaldson, Ross J. and Mazzarella, Luca and Collins, Robert J. and Jeffers, John and Buller, Gerald S. (2018) A high-gain and high-fidelity coherent statecomparison amplifier. Communications Physics, 1. 54. ISSN 2399-3650 (https://doi.org/10.1038/s42005-018-0054-z)

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Abstract

Optical signals are subject to a distance-dependent loss as they propagate through trans-mission media. High-intensity, classical, optical signals can routinely be amplified to over-come the degradation caused by this loss. However, quantum optical states cannot bedeterministically amplified and any attempt to do so will introduce intrinsic noise that spoilsthe desired quantum properties. Non-deterministic optical amplification, based on post-selection of the output depending on certain conditioning detection outcomes, is an emergingenabling technology in quantum measurement and quantum communications. Here wepresent an investigation into the properties of a simple, modular optical state comparisonamplifier operating on weak coherent states. This amplifier requires no complex quantumresources and is based on linear optical components allowing for a high amplification rate athigh gain andfidelity. We examine the amplifier’s performance in different configurations anddevelop an accurate analytical model that accounts for typical experimental scenarios.

ORCID iDs

Donaldson, Ross J., Mazzarella, Luca ORCID logoORCID: https://orcid.org/0000-0001-9173-3477, Collins, Robert J., Jeffers, John ORCID logoORCID: https://orcid.org/0000-0002-8573-1675 and Buller, Gerald S.;
  • Item type:Article
    ID code:65416
    Dates:
    Date
    Event
    12 September 2018
    Published
    21 August 2018
    Accepted
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:13 Sep 2018 14:07
    Last modified:11 Nov 2024 12:06
    URI:https://strathprints.strath.ac.uk/id/eprint/65416
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