Ph.D. Student (M/F) in the Design of Superconducting Microwave Components for Quantum Computing Applications

Job Description

Thesis Subject

This thesis project is part of the ongoing Miracle_Q project under the PEPR Quantique program (https://www.pepr-quantique.fr/projet/miracle_q/)
The student will collaborate with various project partners and will be more directly involved in the collaboration between the company C12qe (https://www.c12qe.com/) and the Xlim laboratory.
The project centers on the design of passive microwave components (filters, resonators, etc.) required, for example, to measure the state of quantum bits (qubits) or to separate low- and high-frequency signals on a quantum chip. We will focus here on the following tasks:
- Design of specialized microwave components (filters, resonators, etc.) at the intersection of quantum physics and microwave engineering
- Implementation using fabrication technologies that incorporate superconducting materials
- Measurements performed at temperatures of a few tens of mK in dilution refrigerators

Your Work Environment

This doctoral thesis is part of a joint thesis funding initiative between the company C12 and the Xlim laboratory, all within the framework of the Miracle_Q project (https://www.pepr-quantique.fr/projet/miracle_q/).
The doctoral student's work will be divided between the company and the Xlim laboratory, which will provide two complementary areas of expertise:
• C12: fabrication and measurement of superconducting circuits, with end applications in the quantum chips developed by the company
• Xlim: modeling, design, and testing of advanced microwave functions (filters, etc.)
The PhD student's ultimate goal will be to design, build, and test microwave devices using superconducting technologies, applied to the objectives of the Miracle_Q project.
The Ph.D. student will therefore be involved in the following activities:
- learning about superconducting fabrication technologies and RF measurement in dilution refrigerators
- training in advanced concepts of quantum physics
- designing advanced microwave functions using commercial tools and those developed at Xlim
- testing these components in a cryogenic environment
- authoring scientific papers for major conferences and journals in the field
As part of the Miracle_Q project, the student will interact regularly with other project collaborators through periodic progress meetings. Visits to collaborators' sites may be arranged to enhance the student's knowledge in the various fields related to the project (technologies based on superconducting materials, etc.).
There will be ongoing communication between C12 and Xlim, and the project will be co-directed by permanent members of both organizations. Trips between the two locations (Paris for C12 and Limoges for Xlim) are anticipated, and an operating budget has been set aside for this purpose.

Constraints and risks

International travel for conferences and travel within France for progress meetings and short research stays. Work in a cleanroom environment.

Compensation and benefits

Compensation

2300 € gross monthly

Annual leave and RTT

44 jours

Remote Working practice and compensation

Pratique et indemnisation du TT

Transport

Prise en charge à 75% du coût et forfait mobilité durable jusqu’à 300€

About the offer

About the CNRS

The CNRS is a major player in fundamental research on a global scale. The CNRS is the only French organization active in all scientific fields. Its unique position as a multi-specialist allows it to bring together different disciplines to address the most important challenges of the contemporary world, in connection with the actors of change.

CNRS

The research professions