Quantum Communications Feasibility Tests over a UK-Ireland 224 km Undersea Link

Ben Amies-King*, Karolina P. Schatz*, Haofan Duan, Ayan Biswas, Jack Bailey, Adrian Felvinti, Jaimes Winward, Mike Dixon, Mariella Minder, Rupesh Kumar, Sophie Albosh, Marco Lucamarini*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


The future quantum internet will leverage existing communication infrastructures, including deployed optical fibre networks, to enable novel applications that outperform current information technology. In this scenario, we perform a feasibility study of quantum communications over an industrial 224 km submarine optical fibre link deployed between Southport in the United Kingdom (UK) and Portrane in the Republic of Ireland (IE). With a characterisation of phase drift, polarisation stability and the arrival time of entangled photons, we demonstrate the suitability of the link to enable international UK–IE quantum communications for the first time.

Original languageEnglish
Article number1572
Number of pages13
Issue number12
Publication statusPublished - 22 Nov 2023

Bibliographical note

Funding Information:
Funding has been provided through the partnership resource scheme of the EPSRC Quantum Communications Hub grant (EP/T001011/1).

Publisher Copyright:
© 2023 by the authors.


  • optical phase drift
  • polarisation stability
  • QKD feasibility study
  • quantum bit error rate
  • quantum entanglement
  • quantum key distribution
  • submarine fibre channel

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