Leveraging a Commercial Source for Metropolitan-Scale Entanglement-Based Quantum Key Distribution

We present the successful multi-day demonstration of BBM92 quantum key distribution over 2x13.8 km of deployed fiber, achieving 98% visibility and 1% QBER using a fully commercial source of energy-time entanglement and off-the-shelf components. Practical issues and device imperfections are discussed and mitigated in software.

Authors

Ronald Freund (ORCID: https://orcid.org/0000-0001-9427-3437)
Michaela Ritter (ORCID: https://orcid.org/0009-0000-9431-493X)
Nicolas Perlot
Matheus Sena (ORCID: https://orcid.org/0000-0002-8592-1495)
Nino Walenta (ORCID: https://orcid.org/0000-0001-7243-0454)
Sarah Sommermeier
Tomi Getselev

Institutions

Fraunhofer Institute for Telecommunications, Heinrich Hertz Institute (DE)
Deutsche Telekom (Germany) (DE)
Deutsche Telekom (United Kingdom) (GB)

Publication Details

Published: 2025-09-28
DOI: https://doi.org/10.1109/ecoc66593.2025.11263080
Primary Topic: Quantum Information and Cryptography
Type: article
Field-Weighted Citation Impact: 0.00

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article

Leveraging a Commercial Source for Metropolitan-Scale Entanglement-Based Quantum Key Distribution

Ronald Freund, Michaela Ritter, Nicolas Perlot, Matheus Sena et al.

Sep 28, 2025

Quantum Information and Cryptography

article

Leveraging a Commercial Source for Metropolitan-Scale Entanglement-Based Quantum Key Distribution

Ronald Freund, Michaela Ritter, Nicolas Perlot, Matheus Sena, Nino Walenta, Sarah Sommermeier, Tomi Getselev

September 28, 2025article en

Abstract

We present the successful multi-day demonstration of BBM92 quantum key distribution over 2x13.8 km of deployed fiber, achieving 98% visibility and 1% QBER using a fully commercial source of energy-time entanglement and off-the-shelf components. Practical issues and device imperfections are discussed and mitigated in software.

Fraunhofer Institute for Telecommunications, Heinrich Hertz Institute (DE), Deutsche Telekom (Germany) (DE), Deutsche Telekom (United Kingdom) (GB)

Openalex Percentile: Top 79%

Quantum Information and Cryptography

DOI Source OpenAlex

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Leveraging a Commercial Source for Metropolitan-Scale Entanglement-Based Quantum Key Distribution — Ronald Freund, Michaela Ritter, et al. · (2025) | TGRS Research Map | TGRS