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Senior quantum computing scientist

Permanent contract
January 2022
Paris

C12 develops reliable & application-specific quantum computers, to solve highly complex computing tasks, currently out of reach of even most powerful supercomputers.

Building a quantum computer still needs innovators ready to tackle exciting challenges. C12 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 minimizes 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 revolutionized classical computing.

Founded in 2020, C12 is a fast-growing start-up, having raised a seed round of USD 10 million in June 2021 and building its own lab space in the center of Paris.

C12’s unique technology

At C12, a qubit, the fundamental functional unit of a quantum computer, is built from an ultra-pure carbon nanotube suspended above a silicon chip containing control electrodes and a quantum communication bus. Spin qubits coupled to a microwave cavity brings interesting perspectives for their individual control and manipulation as well as for the circuit architecture. A suspended isotopically pure 12C nanotube holds great promises in terms of stability, as it reduces all sources of decoherence (charge noise, nuclear spin noise, phonon relaxation).

C12 encourages all who feel qualified to apply. Recruitment decisions are based solely on qualifications, skills, knowledge and experience. Applications from women are particularly welcomed.

Your role at C12 Quantum

You will set up the architecture of a five-qubit chip with all-to-all connectivity between spin qubits. You will collaborate closely with other teams which are working on providing design of the quantum on-chip circuits, device fabrication, theoretical work on our qubits, and software engineering support.

Designing the procedures  for state preparation, 1 and 2-qubit gates and multi-qubit readout

Conducting characterization and benchmarking experiments

Supervising several tasks

  • Design of the experiments to improve gate fidelities and test all-to-all connectivity schemes
  • Design and test of microwave circuit layout
  • Specification, maintenance, and installation of RF control bench at room temperature and at cryogenic temperature
  • Automation of qubit calibration and multi-qubit control

Sharing expertise and findings with other team members

About you
  • PhD in Electrical engineering, Physics, Applied Physics, or other related field (or demonstrated industry experience)
  • Minimum 2+ years of postdoc or R&D work involving microwave electronics and measurements of superconducting or spin qubits. Experience with multi qubits electronic circuits is seen as an advantage
  • Basic understanding of good software development practices, Python language, and version control systems
  • Ability to distil and communicate scientific information effectively with the wider team
  • Good communication in English (verbal and written)
  • Demonstrated leadership skills are seen as an advantage
You should join us if
  • You want to contribute to achieve landmark results in quantum computing, making a difference in the emerging quantum technologies
  • You want to work within an 18-people team with various backgrounds in nano-fabrication, quantum electronics and carbon nanotube science to materialize the vision of a revolutionary quantum computing processor
  • You want to thrive in a exceptional scientific environment with several industrial and academic partners
  • You relate to our values (excellence, scientific integrity, diversity, curiosity and care) and want to help us define our product-focus culture and ambition to accelerate
Submit your resume to join the quantum race
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