Freiburg 2024 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 54: Quantum Optics in Space
Q 54.6: Vortrag
Donnerstag, 14. März 2024, 15:45–16:00, HS 3219
QUBE-II: Towards Quantum Key Distribution between a CubeSat and Ground — •Jonas Pudelko for the QUBE-II collaboration — Friedrich-Alexander-Universität Erlangen-Nürnberg, Lehrstuhl für optische Quantentechnologien, Staudtstr. 7/B2, D-91058 Erlangen, Germany — Max Planck Institute for the Science of Light, Staudtstr. 2, D-91058 Erlangen, Germany
The limited range of quantum key distribution (QKD) in fiber based systems has led to several projects aiming for the development of a satellite based QKD infrastructure, like the MICIUS mission, which impressively demonstrated QKD on a global scale. However, the high costs of satellite launches for such a system can be reduces dramatically by further reduction in size, weight and power.
The QUBE-II mission is designed to perform the first QKD exchange between a small 8U CubeSat (10×20×40 cm3) and a ground station. Based on the predecessor mission QUBE, two enhanced integrated QKD transmitters implement polarization and phase based versions of the BB84 decoy protocol. Both transmitters are managed by a protocol board, which is using a photonically integrated quantum random number generator as an entropy source. The quantum states are transmitted via an optical telescope with aperture size of 80 mm, which is also used to establish a bi-directional classical data link for post processing.
In this work, we will present the mission concept and discuss the challenges of performing quantum optic experiments on a CubeSat in space.
Keywords: Quantum Key Distribution; CubeSat; Satellite QKD; Photonic Integrated Circuits