Integration of Lucy: A New Era in Hybrid Quantum-Classical Computing

A significant advancement in hybrid quantum-classical computing has been achieved with the integration of a 12-qubit photonic quantum computer named Lucy into the Joliot-Curie supercomputer in France. This integration, completed in October 2025, is housed at the Très Grand Centre de Calcul (TGCC), a high-performance computing facility managed by the French Alternative Energies and Atomic Energy Commission (CEA). Developed by Quandela, Lucy is recognized as the most powerful photonic quantum computer operational in Europe to date.

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Lucy has been designed to work alongside traditional supercomputers, enabling combined quantum and classical processing for complex computational tasks. This hybrid approach is particularly beneficial for applications that require handling large datasets and multi-variable simulations, such as energy grid optimization, logistics, risk modeling, and aerospace design. The integration of Lucy into the existing supercomputing infrastructure represents a strategic move towards achieving near-term quantum advantage, allowing researchers to leverage quantum processors for specific calculations while utilizing classical systems for broader workflows.

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The integration of Lucy is part of a larger trend in Europe aimed at enhancing technological sovereignty through collaborative projects. Niccolo Somaschi, CEO of Quandela, emphasized the significance of this project as a result of close cooperation with German partner Attocube, highlighting the Franco-German dynamic in advancing European technology. This initiative aligns with Europe’s broader ambitions to develop next-generation supercomputing systems, including plans for the upcoming Alice Recoque exascale machine, which is expected to incorporate hybrid quantum computing capabilities.

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Anne-Isabelle Etienvre, the administrator general of the CEA, remarked on the integration, stating, “With Lucy, the CEA is once again demonstrating a concrete translation of its long-standing commitment to quantum computing.” This statement underscores the ongoing efforts to connect quantum machines with classical supercomputers, marking a pivotal moment in the evolution of computational technology.

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While the integration of Lucy is celebrated as a milestone, some experts express caution regarding the practical applications of quantum computing. Critics argue that the current state of quantum technology may not yet be ready for widespread deployment in solving real-world problems, suggesting that further advancements are necessary before fully realizing its potential.

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As Lucy becomes operational in the coming weeks, it is expected to serve researchers across Europe, facilitating a shift from experimental setups to practical applications of quantum computing. The ongoing integration of quantum systems into operational environments signifies a transformative phase in computational technology, paving the way for future innovations in the field.

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• “With Lucy, the CEA is once again demonstrating a concrete translation of its long-standing commitment to quantum computing,” — Anne-Isabelle Etienvre, Administrator General of CEA

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• “This project is also the result of close cooperation with our German partner Attocube and fully embodies the Franco-German dynamic in service of European technological sovereignty.” — Niccolo Somaschi, CEO of Quandela

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