About
C12 Quantum Electronics develops quantum processors that use ultra-pure carbon nanotubes as qubits. It was founded by twin brothers Matthieu and Pierre Desjardins as an Ecole Normale Superieure spinoff. In 2025, C12 achieved record coherence times of 1.3 microseconds, exceeding silicon quantum dots by 100x and setting a new benchmark for solid-state systems. It released a five-qubit chip with expected gate fidelities above 99% and has a pathway to systems of 50 or more qubits by 2027 to 2030. On January 27, 2026, C12 announced a strategic integration partnership with Classiq to accelerate access to spin qubit quantum computing. The Classiq platform now supports Callisto, C12's digital twin, which models 13 noisy qubits with realistic carbon-nanotube noise characteristics, enabling optimized quantum circuits for carbon nanotube spin qubit architectures. C12 has partnered with CEA to develop next-generation multi-qubit chips at wafer scale and received an EU HiFiQC (High-Fidelity Quantum Computing) HORIZON grant. It operates Quantum Fab in Paris, a quantum processor production line with a cleanroom, and employs 62 people, including 22 PhDs across 18 nationalities. Total funding is 29.3 million euros, from 360 Capital, Varsity Ventures, Verve Ventures, EIC Fund, Airbus Ventures, and BNP Paribas.
Quantum Specifications
| Qubit Technology | Carbon nanotube spin qubits |
| Physical Qubits | 6 |
| Quantum Focus | hardware |
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Related News
C12 Automates Pick & Place Nanoassembly to Standardize Carbon Nanotube Qubit Fabrication
C12 Introduces Nanoassembly Process for Carbon Nanotube Quantum Chips
C12 Unveils Roadmap, Targets Useful Fault-tolerant Quantum Computing by 2033 - The Quantum Insider
C12 Unveils Roadmap to Utility-Scale Fault-Tolerant Quantum Computing by 2033 - Quantum Computing Report
C12 Unveils Roadmap to Utility-Scale Fault-Tolerant Quantum Computing by 2033
