Medium-range terrestrial free-space QKD performance modelling and analysis

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Abstract

Medium-range terrestrial free-space quantum key distribution systems enable widespread secure networked communications in dense urban environments, where it would be infeasible to install a large number of short optical fibre links. Such networks need to perform over a wide range of conditions and their design has to balance key rate maximisation versus robust key generation over the greatest range of circumstances. Practicalities, such as manufacturability and deployment, further constrain the design space. Here, we examine challenges in translating experiment into engineering reality and identify efficient BB84 weak coherent pulse-decoy state protocol parameter regimes suitable for medium-range QKD systems considering likely system performance and environmental conditions.

Original languageEnglish
Title of host publicationQuantum Technology
Subtitle of host publicationDriving Commercialisation of an Enabling Science II
EditorsMiles J. Padgett, Kai Bongs, Alessandro Fedrizzi, Alberto Politi
Place of PublicationBellingham, WA
Number of pages10
Volume11881
ISBN (Electronic)9781510646063
DOIs
Publication statusPublished - 6 Oct 2021
EventQuantum Technology: Driving Commercialisation of an Enabling Science II 2021 - Glasgow, United Kingdom
Duration: 28 Sep 202130 Sep 2021

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume11881
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceQuantum Technology: Driving Commercialisation of an Enabling Science II 2021
Country/TerritoryUnited Kingdom
CityGlasgow
Period28/09/2130/09/21

Keywords

  • medium-range
  • terrestial free-space QKD
  • performance modelling and analysis
  • QKD
  • free-space optics

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