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 who recently raised EUR 18 million in 2024 to further its research in its own lab in the heart of Paris (Panthon).
Your role at C12 Quantum Electronics
As part of the nanoassembly team at C12 you will be operate and develop a custom nanoassembly apparatus to integrate ultra-pure carbon nanotubes with microchips to create qubits.
In collaboration with other scientists you will:
Operate a custom-built nanoassembly apparatus in an ISO7 certified clean room
Develop the Python-based custom control software to enhance throughput and automation
Probe and optically inspect microchips (probe station SEM)
Electrically characterise quantum devices
Analyse summarise and present data
About you
Required Qualifications
At least a Master in Physics Applied Physics Materials ScienceEmbedded systems engineering Electrical engineering or other related field
Good understanding of proper software development practices Python language and version control systems
Basic knowledge of micro electronics and low current measurements
Detail oriented
Problem solving and creativity
Ability to distil and communicate scientific information effectively with the wider team
Good communication in English (oral and written)
Preferred Qualifications
Experience in 3D design software
Experience in semiconductors
Experience with high vacuum systems
Experience in carbon nanotubes
You should join us if...
You want to contribute to achieve landmark results in quantum computing and participate in setting up the world-first architecture of a five-qubit chip with all-to-all connectivity between spin qubits making a difference in the emerging quantum technologies
You want to work within a 50-people team with various backgrounds in physics chemistry mechanical engineering electrical engineering and software engineering 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.
C12s 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.
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