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Quantum Measurement Engineer

Permanent contract
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

As part of the quantum measurement team at C12, you will measure and characterize spin qubit devices to achieve quantum operations. In collaboration with other scientists you will:

Work on optimising and automatizing the formation of double quantum dots coupled to microwave resonators

Develop coherent control of spin qubits hosted in carbon nanotubes

Along with our theory team, collaborate in the design and the implementation of optimised readout schemes as long as 1-qubit and 2-qubit gates

Along with our nanofabrication team and RF engineers, participate in the design of the on-chip microwave architecture in order to maximise readout fidelity and qubit coupling

Maintain, specify and build room-temperature DC and high frequency measurement setup (hardware and software)

About you
  • At least, master in Electrical engineering, Physics, Applied Physics, or other related field - PhD in one of those field is preferred
  • Background in cryogenics and semiconductor/superconductor device measurements (low-noise electronic measurements, cryogenic techniques, quantum dot characterization, cavity Quantum ElectroDynamics experiments) - experience with spin qubits or superconducting qubits is preferred
  • 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)

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 26-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 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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