French National Quantum Update: September 2026

French National Quantum Update – September 2026

The French quantum ecosystem is moving from laboratory prototypes to industrial‑scale production. In September 2026, the sector’s headline stories revolve around silicon‑spin‑qubit manufacturing, software‑hardware integration, and a shift in public‑sector priorities toward commercial applications.

1. Silicon spin‑qubits hit the 300 mm road‑map

Quobly, the French start‑up that has partnered with STMicroelectronics, announced that its QSOI® chips now support qubit readout, single‑qubit gates and two‑qubit gates on a 300 mm wafer. The results, produced in ST’s Crolles plant, validate the company’s industrial‑process approach and open the door to mass production. Quobly has also deepened its collaboration with CEA‑Leti, gaining access to the FAMES Pilot Line to test new process flows for future generations. Complementary industrial agreements—an MoU with Orange Quantum Systems for high‑throughput testing and a partnership with Absolut System for cryogenic infrastructure—signal a coordinated effort to scale silicon‑based quantum processors.

2. Software ecosystems expand beyond a single vendor

A recurring theme in the month’s news is the need for diverse software stacks. CEA and the start‑up Alice & Bob are building a quantum‑supercomputing interface that will let silicon and photonic processors run side‑by‑side with conventional CPUs and GPUs. Quandela’s white paper on integrating its photonic QPU with NVIDIA infrastructure illustrates a similar vision: a hybrid accelerator model that keeps AI workloads on GPUs while offloading quantum‑specific tasks to QPUs. These initiatives aim to prevent a single‑ecosystem lock‑in and foster a competitive, interoperable quantum software landscape.

3. Public‑sector focus shifts to commercial use cases

Pasqal announced the end of its participation in the French defense program LSQUARE (PROQCIMA) and will now concentrate on commercial applications. This mirrors a broader policy trend: the Ministry of the Armed Forces is investing in the Aliquante platform—an in‑house, classified‑environment programming suite—while other defense‑related projects, such as Thales‑C12’s QuantumTrack radar‑tracking system, continue to explore niche military uses. The shift reflects a strategic decision to leverage quantum technology for commercial advantage while maintaining a separate, secure pathway for defense research.

4. International collaborations broaden France’s quantum footprint

France’s quantum community is increasingly global. Quandela’s partnership with Quanova will help build quantum capabilities in Vietnam, while a memorandum with CMC Microsystems brings Quandela’s photonic QPU into Canada’s Quantum Computing Sandbox. These agreements demonstrate France’s role as a technology partner and knowledge exporter, positioning French companies as key players in the worldwide quantum supply chain.

Practical Takeaway

• Manufacturing: Silicon‑spin‑qubits are now producible at 300 mm, paving the way for industrial scale.
• Software: Multiple vendors are developing interoperable stacks, reducing reliance on a single ecosystem.
• Policy: Public funding is pivoting from defense to commercial applications, while classified projects continue in parallel.
• Global reach: French firms are actively exporting quantum expertise to Asia and North America.

Stakeholders—investors, policymakers, and researchers—should monitor these developments as they signal a maturation of France’s quantum industry and a clearer path toward commercial deployment.

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TL;DR: In September 2026, France’s quantum sector advances silicon‑spin‑qubit manufacturing, diversifies software ecosystems, shifts public‑sector focus to commercial applications, and expands international collaborations, signaling a move from prototype to industrial scale.