Entanglement distribution via free-space optical links (QFREE)
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DOI of the original publication
Related research data
Project type
angewandte Forschung
Project start
01.06.2026
Project end
31.05.2030
Project status
laufend
Project contact
Project manager
Contributors
Description
Abstract
Entanglement distribution via free-space optical links: from high-altitude balloons to space-time curvature tests (QFREE).
The QFREE project investigates the distribution of entangled photon pairs over free-space optical links using drones and stratospheric balloons, extending quantum communication beyond fibre-based networks.
By integrating High-Altitude Platform Stations (HAPs) and precise optical tracking systems, QFREE contributes to a hybrid quantum communication system.
The project also enables fundamental tests of quantum mechanics in curved space-time.
A central outcome is a Swiss-Korean collaboration combining Swiss expertise in free-space quantum cryptography with Korean capabilities in optical tracking.
FHNW develops a two-axis gimbal and optical fine-steering system (hardware and software) for balloon and drone platforms, laying the foundation for future satellite-based quantum networks.
Link
Created during FHNW affiliation
Yes
Strategic action fields FHNW
Zero Emission
School
Hochschule für Technik und Umwelt FHNW
Institute
Institut für Sensorik und Elektronik
Financed by
Schweizerischer Nationalfonds (SNF)
Korean-Swiss Science and Technology Programme
Korean-Swiss Science and Technology Programme
Project partner
University of Bern
Gwangju Institute of Science and Technology, South Korea
Gwangju Institute of Science and Technology, South Korea
Contracting authority
SAP reference
T456-0144-2
Keywords
Quantum communication
drones
stratospheric balloon
quantum cryptography
drones
stratospheric balloon
quantum cryptography