A 12-qubit photonic quantum computer called Lucy has been integrated with the Joliot-Curie supercomputer in France, marking a new step in hybrid quantum-classical computing.

The system is installed at the Très Grand Centre de Calcul (TGCC), a major high-performance computing facility operated by the French Alternative Energies and Atomic Energy Commission.

Developed by Quandela, Lucy is described as the most powerful photonic quantum computer deployed in Europe to date.

The system has been integrated into the existing supercomputing infrastructure to allow combined quantum and classical processing for complex computational tasks.

The project was carried out under the EuroHPC Joint Undertaking, with involvement from the CEA and GENCI. Lucy was installed in October 2025 and is expected to come online in the coming weeks, making it accessible to researchers across Europe.

The integration follows an earlier deployment of another Quandela system, Belenos, at the same facility, signaling a broader push to combine quantum systems with traditional supercomputers in operational environments.

Hybrid computing takes shape

Once operational, Lucy will support a range of applications, including energy grid optimization, logistics, risk modeling, and aerospace design.

These are areas where classical systems alone struggle with scale or complexity, especially when dealing with large datasets and multi-variable simulations.

“With Lucy, the CEA is once again demonstrating a concrete translation of its long-standing commitment to quantum computing,” said Anne-Isabelle Etienvre, administrator general of the CEA.

“From the first qubits developed by our fundamental research teams… to the exploration of connecting quantum machines with classical supercomputers at the TGCC.”

The integration reflects a growing trend toward hybrid systems, where quantum computers are used alongside high-performance computing systems rather than as standalone replacements.

This approach is seen as a practical pathway to near-term quantum advantage, allowing researchers to offload specific calculations to quantum processors while relying on classical systems for broader workflows.

Europe’s quantum push grows

Quandela CEO Niccolo Somaschi pointed to the broader regional implications of the project.

“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.”

The Lucy system uses photonic quantum computing, which relies on light particles instead of superconducting circuits.

This approach avoids the need for extreme cryogenic cooling and allows the system to fit into standard data center environments, making integration with existing infrastructure easier.

The development also comes as Europe prepares for next-generation supercomputing systems.

Plans are already in place to replace the Joliot-Curie system with the upcoming Alice Recoque exascale machine, which is expected to include hybrid quantum computing partitions.

As more quantum systems are integrated into operational computing environments, projects like Lucy highlight a shift from experimental setups to practical deployment, where quantum computing begins to play a role in real-world problem solving.