The rise of quantum technologies holds immense promise for societal and technological breakthroughs, especially with the advent of the “Quantum Internet.” This revolutionary network will interconnect quantum computers and sensors, fostering a new era of secure communications and distributed quantum computing. However, achieving a functional and scalable Quantum Internet (QIN) requires overcoming significant technical challenges. Central to this is the creation of efficient, long-distance quantum links, which are fundamental to enabling quantum entanglement over vast distances, facilitating secure communication and the deployment of quantum computing resources.
Quantum entanglement, which underpins QINs, allows particles to be linked in such a way that the state of one particle directly influences the state of another, regardless of the distance between them. This property promises breakthroughs in data security and computational power. However, quantum information is highly susceptible to loss over distance, and classical methods for extending communication range are ineffective in quantum systems due to the principles of quantum mechanics. This makes the development of quantum repeaters essential for QINs, ensuring reliable quantum entanglement distribution over long distances.
The project, Welinq, builds upon our previous work within the EU Flagship Quantum Internet Alliance (QIA), where we focused on developing a quantum memory (QM) system based on laser-cooled ensembles of cold atoms. Our QM system has achieved a world-record 90% storage efficiency, enabling the possibility of quantum interconnections. The Welinq project aims to advance this technology further by developing the world’s first industry-grade quantum memory links that combine high-efficiency, long-storage times, and integrated frequency conversion to interface with optical telecommunication bands. By achieving these advancements, we aim to enhance the range and capabilities of QINs, providing the critical infrastructure needed for secure, high-speed communication at long distances.
The project will help the European Union maintain technological sovereignty by advancing cutting-edge quantum technologies that will play a central role in securing communication networks and enabling the next generation of computing technologies. The Welinq project is a key step towards making the Quantum Internet a reality, with direct implications for both Europe’s technological leadership and its digital economy.
