ESA unites quantum projects to move technology into orbit

Sinda Mejri, coordinator of ESA's Quantum Technology Cross-Cutting Initiative, outlined how the agency links quantum work across telecoms, navigation, Earth observation and science. ESA is advancing satellite-based quantum key distribution via SAGA, the Aces clocks sent to the ISS in 2025 and cold-atom gravity sensors.

• ESA initiative unifies quantum projects under one strategy and roadmap
• SAGA sends quantum encryption keys via satellites over long distances
• Aces clocks reached the ISS in 2025 to compare orbital and ground time
• Key hurdles are European components, funding continuity and hybrid skills