C12 develops quantum computers to solve highly complex computing tasks currently out of reach of even the most powerful supercomputers. Building a quantum computer still needs innovators ready to tackle exciting challenges. C12s founders are convinced that only a new material for the qubit will bring a technological breakthrough. C12 uniquely uses carbon nanotubes as the fundamental building blocks of its quantum processor. This high-purity material minimises errors radically improves performance and reduces hardware overhead for fault-tolerant computing. Combined with well-established semiconductor techniques carbon nanotubes will help scale quantum computing just as silicon revolutionised classical computing. Our unique & innovative quantum computing technology enables us to address use cases solving intractable problems our industrial customers are facing.
Founded in 2020 C12 is a fast-growing start-up having raised EUR 18 million in 2024 to further its research in its own lab in the heart of Paris (Panthon).
You should join us if...
You want to have a key role in a growing startup with challenges at the frontier of the technology.
You want to contribute to achieving landmark results in quantum computing making a difference in the emerging quantum technologies.
You want to work within a 50-people team with various backgrounds in nanofabrication quantum electronics and carbon nanotube science to create a revolutionary quantum computing processor.
You want to thrive in an exceptional scientific environment with several industrial and academic partners.
You share our values (excellence scientific integrity diversity curiosity and care) and want to help us define our product-focused culture and ambition to accelerate.
C12 Quantum Electronics unique technology
At C12 a qubit the fundamental functional unit of a quantum computer is built from an isotopically ultra-pure 12C nanotube suspended above a silicon chip containing control electrodes and a quantum communication bus. Our spin qubits hold great promise in terms of individual control and manipulation as well as for the circuit architecture. A suspended isotopically-pure 12C nanotube holds great promise in terms of stability as it reduces all sources of decoherence (charge noise nuclear spin noise and phonon relaxation).
C12 encourages all who feel qualified to apply. Recruitment decisions are based solely on qualifications skills knowledge and from women are particularly welcomed.