Hannover 2016 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 62: Quantum Information: Quantum Computing and Communication III
Q 62.5: Vortrag
Freitag, 4. März 2016, 12:00–12:15, e214
Continuous-variable high-speed quantum key distribution compatible with telecom networks — •Imran Khan1,2, Birgit Stiller1,2,3, Kevin Jaksch1,2, Christian Peuntinger1,2, Kevin Günthner1,2, Jonas Geyer-Ramsteck1,2, Nitin Jain1,2,4, Dominique Elser1,2, Christoph Marquardt1,2, and Gerd Leuchs1,2,5 — 1Max Planck Institute for the Science of Light, 91058 Erlangen Germany — 2Institute of Optics, Information and Photonics, University of Erlangen-Nuernberg, 91058 Erlangen, Germany — 3Centre for Ultrahigh bandwidth Devices for Optical Systems (CUDOS), School of Physics, University of Sydney, NSW 2006, Australia — 4Center for Photonic Communication and Computing, EECS Department, Northwestern University, Evanston, Illinois 60208, USA — 5Department of Physics, University of Ottawa, 25 Templeton, Ottawa, ON, Canada
The ability to securely distribute keys at high rates is of crucial importance for the future of practical quantum key distribution (QKD). In this work, we show our progress on implementing a GHz rate continuous-variable QKD setup in a realistic telecom environment, employing wavelength-division multiplexing. We discuss how these high transmission rates increase the robustness against finite-size effects and realistic noise sources (e. g. in the low frequency regime; also relevant for free-space channels with fluctuating transmission). We also show the experimental status on implementing a local oscillator, which is situated at the receiver.