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QI: Fachverband Quanteninformation
QI 3: Quantum Communication
QI 3.14: Talk
Monday, March 18, 2024, 13:00–13:15, HFT-TA 441
Entanglement-based free-space links for quantum networks — •Antonio Gallego Barrio1,2, Jan Tepper1, Michael Auer2,3,4, Alberto Comin1, and Harald Weinfurter2,4,5 — 1Airbus Central R&T, Munich, Germany — 2Ludwig-Maximilians-Universität, Munich, Germany — 3Universität de Bundeswehr München, Neubiberg, Germany — 4Munich Center for Quantum Science and Technology, Munich, Germany — 5Max-Planck-Institut für Quantenoptik, Garching, Germany
Quantum key distribution (QKD) protocols can be implemented with different technologies and means. For a future practical quantum network it will be valuable to combine them wisely and exploit the relative strengths of fiber based and free-space links.
Here we present some of the approaches and the main challenges which need to be overcome when implementing the links of a quantum network. The key topics are photon detection, time-correlated single photon counting and verification and use of entanglement.
There will also be a brief review about the limitations of the commercially available technologies and some of the implementation details of the QKD links, which will have a deep impact on the development of near-term QKD networks.
Keywords: QKD; entanglement; single-photon detection; quantum network; free-space QKD