Erlangen 2022 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

Q: Fachverband Quantenoptik und Photonik

Q 60: Quantum Information II

Q 60.6: Poster

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

Quantum Key Distribution based on time-bin entanglement in a scalable star-shaped network — •Till Dolejsky, Erik Fitzke, Maximilian Tippmann, Lucas Bialowons, Oleg Nikiforov, and Thomas Walther — TU Darmstadt, Institute of Applied Physics, 64289 Darmstadt

We demonstrate quantum key distribution in a star-shaped multi user network with time-bin entangled photon pairs employing four users simultaneously. The setup is tested at a facility of Deutsche Telekom AG and photons are sent over a commercial optical fiber route. We achieve stable key distribution over distances of more than 75 km and durations of up to several hours. This QKD system is robust and allows to extend the network to dozens of users by standard multiplexing techniques, such as wavelength division multiplexing and time division multiplexing.