The University of Strathclyde is leading a three-year, €2 million EU-funded project called AL FreSQO to develop quantum memories for long-distance quantum networks, according to a press release issued by the institution. The initiative investigates cold-atom quantum memories, free-space optical links, and wavelength conversion to support quantum communication over extended ranges where traditional fibre networks are not practical.
Bridging Distances with Cold-Atom Quantum Memories
Quantum signals are fragile, cannot be copied or amplified, and are easily lost over long distances, according to Professor Daniel Oi of Strathclyde’s Department of Physics, who serves as the lead coordinator of AL FreSQO. To counter signal loss, the project relies on repeater devices and quantum memories that buffer data over long-distance links by distributing entanglement.
According to project documentation, these devices break long links into shorter ones and reconnect them through entanglement swapping. This mechanism allows information to travel much further than standard configurations currently permit.
Did you know?
Quantum entanglement is a fundamental resource for quantum information technologies, enabling secure communications, efficient sensing, and advanced computation.
Alternative Technologies: Free-Space Links and Frequency Conversion
Traditional fibre optic cables cannot be deployed easily in every environment. To solve this limitation, AL FreSQO explores free-space optical links as an alternative to fibre networks, making the technology suitable for use in space, aviation, shipping, rail, and haulage sectors.
“Free-space links are important where fibre networks are not practical, such as for satellite communications,” Professor Oi stated. Additionally, the project investigates systems that inter-convert the light wavelengths used in telecommunications with those that easily interact with quantum systems. “Frequency conversion allows us to connect free-space and fibre networks by matching different wavelengths, giving greater flexibility in how quantum networks are built,” Professor Oi added.
These approaches can reduce the need for bulky, energy-intensive cryogenic systems frequently required by alternative quantum memory platforms.
Collaborative Research and Strategic Alignment
The AL FreSQO project brings together expertise in quantum optics, atomic and solid-state physics, and systems engineering. University documentation shows that Strathclyde is working alongside ThinkQuantum—a spinout from the University of Padova—as well as the Universities of Southampton and Padova, Humboldt University of Berlin, and Sabancı University situated in Istanbul Province.
Strathclyde’s involvement as a partner in one of the four nationwide UK quantum hubs ties this project directly into the Integrated Quantum Networks Quantum Technology Research Hub. It also follows the EPSRC International Network in Space Quantum Technologies, previously led by Professor Oi as Principal Investigator, and supports the UK National Quantum Strategy goal of delivering advanced quantum networks at scale by 2035.
Potential Applications Across Industries
Beyond building the foundations for a future quantum internet, the research supports several practical applications:
- Secure communications across mobile and fixed platforms
- Clock synchronization for high-precision timing networks
- Advanced sensing networks for defense and environmental monitoring
- Training the next generation of quantum physicists
Pro Tip for Researchers:
Integrating free-space optics with wavelength conversion offers a scalable pathway to hybrid networks, bridging the gap between terrestrial fiber grids and satellite constellations.
Frequently Asked Questions
What is the primary goal of the AL FreSQO project?
The project aims to develop quantum memories and repeater systems based on cold atoms to enable long-distance quantum communication networks.
Who is leading the AL FreSQO initiative?
The University of Strathclyde leads the three-year, €2 million project, with Professor Daniel Oi serving as the lead coordinator.
What funding supports AL FreSQO?
The project is funded under QuantERA, a transnational quantum technologies programme supported by the European Commission.
What are the main transport applications for this technology?
AL FreSQO technology could support quantum networking applications in space, aviation, shipping, rail, and haulage where optical fibre links are impractical.
Explore More Quantum Technology Insights
Stay updated on the latest breakthroughs in quantum communication and European research initiatives. Share your thoughts in the comments below or subscribe to our updates.