SAMOP 2023 – wissenschaftliches Programm
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QI: Fachverband Quanteninformation
QI 8: Quantum Communication I (joint session Q/QI)
QI 8.5: Vortrag
Montag, 6. März 2023, 18:00–18:15, F442
Free-space continuous-variable quantum key distribution using discrete modulation — •Kevin Jaksch1,2, Thomas Dirmeier1,2, Yannick Weiser1,2, Stefan Richter1,2, Ömer Bayraktar1,2, Bastian Hacker1,2, Conrad Rößler1,2, Imran Khan1,2, Andrej Krzic3, Teresa Kopf3, René Berlich3, Matthias Goy3, Daniel Rieländer3, Fabian Steinlechner3, Florian Kanitschar4,5, Stefan Petscharning4, Thomas Grafenauer4, Ömer Bernhard4, Christoph Pacher4, Twesh Upadhyaya5, Jie Lin5, Norbert Lütkenhaus5, Gerd Leuchs1,2, and Christoph Marquardt1,2 — 1Max Planck Institute for the Science of Light, Erlangen, Germany — 2Friedrich Alexander University Erlangen-Nürnberg, Germany — 3Fraunhofer Institute for Applied Optics and Precision Engineering, Jena, Germany — 4AIT Austrian Institute of Technology, Center for Digital Safety&Security, Vienna, Austria — 5Institute for Quantum Computing and Department of Physics and Astronomy, University of Waterloo, Canada
In future metropolitan quantum key distribution (QKD) networks, point-to-point free-space links will allow to secure the communication beyond the existing but inflexible fiber backbone. For this purpose, we investigate a continuous-variable QKD system using a discrete modulation pattern in the polarization degree of freedom. We present our results obtained in an experiment over an urban 300m free-space link between the Federal Ministry of Education and Research (BMBF) and the Federal Office for Information Security (BSI) in Bonn.