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Erlangen 2022 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 60: Quantum Information II

Q 60.11: Poster

Thursday, March 17, 2022, 16:30–18:30, P

A compact and versatile DM-CV QKD system for the QuNET initiative — •Stefan Richter1, 2, Ömer Bayraktar1, 2, Kevin Jaksch1, 2, Bastian Hacker1, 2, Imran Khan1, 2, 5, Emanuel Eichhammer1, 5, Emmeran Sollner1, 5, Twesh Upadhyaya3, Jie Lin3, Norbert Lütkenhaus3, Florian Kanitschar4, Stefan Petscharnig4, Thomas Grafenauer4, Ömer Bernhard4, Christoph Pacher4, Gerd Leuchs1, and Christoph Marquardt11QIV Research Group, MPI for the Science of Light, Erlangen, Germany — 2Friedrich Alexander University Erlangen-Nuremberg, Erlangen, Germany — 3Institute for Quantum Computing, Dept. of Physics and Astronomy, University of Waterloo, Canada — 4Security & Communication Technologies Unit, Austrian Institute of Technology, Vienna, Austria — 5now with KEEQuant GmbH, Fürth, Germany

Continuous-variable quantum key distribution (CV-QKD) is poised to become a key technology for securing critical communication infrastructure against the emerging threats of quantum computers. We present our implementation of a compact and versatile fiber-coupled discrete modulation CV-QKD system for metropolitan networks. We also show preliminary key rate estimates and channel characterization results obtained during a public technology demonstration in August 2021. Some aspects and challenges of the implementation are discussed, including error correction requirements.

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