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Q: Fachverband Quantenoptik und Photonik
Q 35: Quantum Information (Quantum Communication) II
Q 35.3: Vortrag
Mittwoch, 16. März 2022, 14:30–14:45, Q-H12
Concepts and development of a receiver for satellite quantum key distribution — •Conrad Rößler1,2, Kevin Günthner1,2, Bastian Hacker1,2, Gerd Leuchs1,2, and Christoph Marquardt1,2 — 1Max Planck Institute for the Science of Light, Staudtstr. 2, 91058 Erlangen, Germany — 2Friedrich Alexander University Erlangen-Nuremberg, Staudstr. 7/B2, 91058 Erlangen, Germany
Since its first proposal in 1984 with the BB84 protocol, quantum key distribution (QKD) has evolved to a fairly mature and most promising quantum technology. QKD allows two parties to share a key in an information-secure way, which overcomes the potential security threat quantum computers pose to public key cryptography. We present a high-rate fiber integrated quantum receiver for phase-encoded satellite-based QKD as well as the corresponding discrete variable QKD protocol. We highlight concepts for single-photon-detection-based phase locking and real time synchronization of sender and receiver as well as compensation for the Doppler shift and optimized quantum signal processing.