A high-gain and high-fidelity coherent statecomparison amplifier

Ross J. Donaldson, Luca Mazzarella, Robert J. Collins, John Jeffers, Gerald S. Buller

Research output: Contribution to journalArticle

2 Citations (Scopus)

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.
LanguageEnglish
Article number54
Number of pages9
JournalCommunications Physics
Volume1
DOIs
Publication statusPublished - 12 Sep 2018

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high gain
amplifiers
optical communication
quantum communication
conditioning
communication
degradation
output
configurations

Keywords

  • optical signals
  • quantum digital signatures
  • optical fibers
  • amplification

Cite this

Donaldson, Ross J. ; Mazzarella, Luca ; Collins, Robert J. ; Jeffers, John ; Buller, Gerald S. / A high-gain and high-fidelity coherent statecomparison amplifier. In: Communications Physics. 2018 ; Vol. 1.
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A high-gain and high-fidelity coherent statecomparison amplifier. / Donaldson, Ross J.; Mazzarella, Luca; Collins, Robert J.; Jeffers, John; Buller, Gerald S.

In: Communications Physics, Vol. 1, 54, 12.09.2018.

Research output: Contribution to journalArticle

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T1 - A high-gain and high-fidelity coherent statecomparison amplifier

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AU - Mazzarella, Luca

AU - Collins, Robert J.

AU - Jeffers, John

AU - Buller, Gerald S.

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N2 - 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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