University of Strathclyde-Led International Team Develops Quantum Memories for Long-Distance Networks with €2M EU Funding

August 30, 2026

University of Strathclyde UK

Overview

An international research team led by the University of Strathclyde is developing cold atom-based quantum memories for quantum repeater devices as part of the €2 million EU-funded AL FreSQO project. These memories are designed to buffer data and mitigate signal loss in long-distance quantum networks, a critical component for scalable quantum communication. The project explores free-space optical links and wavelength inter-conversion to reduce the need for cryogenic systems, supporting secure communications and advancing the UK National Quantum Strategy.

In Depth

Key Findings

An international research team spearheaded by the University of Strathclyde is actively developing advanced quantum memories, a crucial component for establishing long-distance quantum networks. This initiative, part of the EU-funded AL FreSQO project with a €2 million grant, focuses on cold atom-based technologies designed to enhance quantum repeater devices, significantly improving the reach and reliability of quantum communication.

Technical/Clinical Details

Cold Atom Quantum Memories: The quantum memories under development utilize ultra-cold atoms to temporarily store quantum information. This mechanism is vital for compensating for the attenuation and loss of quantum signals over optical fibers, thereby enabling the preservation of quantum entanglement across extended distances.
Application in Quantum Repeater Devices: These quantum memories serve as the core component of quantum repeater devices. Quantum repeaters are essential for overcoming the limitations of quantum communication, where signals cannot be amplified without disturbing their quantum state, by effectively “repeating” entanglement over very long distances.
Free-Space Optical Links and Wavelength Inter-conversion: Beyond fiber-optic applications, the project is also investigating the potential of free-space optical (FSO) links for quantum communication. Furthermore, wavelength inter-conversion techniques are being explored to efficiently transfer quantum information between different physical systems, improve compatibility with existing communication infrastructures, and potentially reduce the reliance on complex cryogenic systems.

Background & Context

Quantum networks are foundational technologies for achieving ultimately secure communication and distributed quantum computing. However, quantum signals are highly fragile and prone to loss over long distances, posing a significant challenge. Quantum repeaters, along with their core quantum memories, are recognized as critical elements to overcome this hurdle, enabling quantum communication across cities and even continents.

Strategic Significance & Outlook

The quantum memory technology being developed under the AL FreSQO project is expected to play a vital role in both the UK National Quantum Strategy and the broader EU quantum technology roadmap. Its practical implementation promises to accelerate the establishment of secure national communication infrastructures, significantly enhancing data security in sectors such as finance, defense, and government. In the long term, it is anticipated to contribute to the foundation of a wider quantum internet, fostering international information sharing and collaborative advancements.

Source: https://www.strath.ac.uk/whystrathclyde/news/2026/memoriestoenablelong-distancequantumnetworks/

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