Maxime LHOTE

Abstract: Within the Quantum Devices Laboratory, you will work in an environment ranging from fundamental physics to new nano-electronics technologies, with a team that works closely with quantum computing startups and physicists from CEA-IRIG and the Neel Institute. The operating conditions of qubits (cryogenic temperatures ≤ 1K, GHz frequencies, high signal density) require the development of suitable components and technological bricks. In particular, the passive radio frequency components developed around CEA-LETI's superconducting interposer technology show extremely interesting electrical properties up to several GHz. These elements, including inductors available over wide value ranges, have already provided the first proof of concept for very compact, low-loss RF filters. The integration of superconducting materials now makes it possible to envisage the creation of new high-performance filters adapted to signal management in the cryogenic environment. You will develop your expertise in the physics of superconducting materials and components. You will study the various superconducting filters that exist in the scientific literature. Using the models developed in the laboratory and the results of the RF measurements in which you will participate, and relying on 3D RF electromagnetic simulation, you will contribute to the design of various RF filters and functions that meet the needs of cryogenic applications.