C12 Quantum Electronics

C12 Quantum Electronics is involved in developing carbon nanotube-based quantum computers. Its technology aims to overcome the limitations of classical computers and existing quantum computers by offering longer qubit lifetimes, lower error rates, and faster gate operation times. This enables users, particularly energy utility companies, to solve complex optimization problems more quickly and accurately with fewer qubits.

C12's approach involves embedding ultra-clean carbon nanotubes (CNTs) onto microchips, where they are suspended over gate electrodes. This allows for the formation of double quantum dots (DQDs) that trap single electrons. The spin of these electrons is then addressed through coupling with a superconducting microwave circuit. By selectively embedding or removing CNTs at the end of the chip fabrication process, C12 Quantum Electronics can preselect the qubits integrated into their processors, a unique advantage over other spin qubit-based quantum computing technologies.

Key customers and partnerships

In 2022, C12 Quantum Electronics announced a breakthrough in manufacturing quantum chips on 200mm silicon wafers in collaboration with the French Alternative Energies and Atomic Energy Commission (CEA). This wafer-size approach combines C12's CNT-based qubit technology with traditional CMOS processes, enabling the company to produce higher-quality qubit chips in higher volumes. As of 2022, C12 Quantum Electronics and CEA had already demonstrated the ability to manufacture core components for calibrating, controlling, and reading qubits using standard manufacturing processes for volume production.