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.
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Item type: Article ID code: 65416 Dates: DateEvent12 September 2018Published21 August 2018AcceptedSubjects: Science > Physics Department: Faculty of Science > Physics Depositing user: Pure Administrator Date deposited: 13 Sep 2018 14:07 Last modified: 09 Apr 2024 00:17 URI: https://strathprints.strath.ac.uk/id/eprint/65416