en
State University (France), Browse similar opportunities
SL-DRT-21-0411
New computing paradigms, circuits and technologies, incl. quantum
As part of Quantum Silicon Grenoble project, teams at CEA-LETI, CEA-IRIG and Néel Institute aim at building a quantum accelerator with silicon spin quantum bits (qubits). Compatible with large-scale production, existing integration processes on Si are a real advantage for the scalability of these qubits. The extreme qubit operating conditions (cryogenic temperatures =1K, high frequencies in the range of a few GHz, high signal density) require the development of adapted technological building blocks. To interconnect the qubits and the controlled circuits, integration of superconducting metals is promising. Indeed, their vanishing resistance at low temperatures and the low thermal conductivity of superconductors also enables to protect the qubits from the heat generated by the control electronics circuits integrated close-by. Note that these developments will also benefit spatial applications sharing similar operating constraints. The thesis will focus on: 1) Studying the superconducting properties of Nb, NbN, TiN, Al and any combination of these materials during integration processes to optimize them for a single level of routing and multilayers pads. Establishing low temperature compatible thermal conductivity measurement set-up, protocol and sample design.2) Transferring the acquired knowledge in term of integration and thermal conductivities to develop the next generation of multi-chip platform hosting qubits and control electronics circuits. The PhD student will be part of the 3D integration and packaging lab of CEA-LETI (Grenoble) and will interact very closely with the Spectral-imaging laboratory for space science at CEA-IRFU (Saclay) for thermal conductivity measurements.
Département Composants Silicium (LETI)
Laboratoire Packaging et 3D
Grenoble
CHARBONNIER Jean
CEA
DRT/DCOS/SCMS/LP3D
CEA LETI MinatecLTPI17, rue des martyrs38054 Grenoble Cedex 9
Phone number: 0438785956
Email: jean.charbonnier@cea.fr
Paris Sciences et Lettres
Astronomie et Astrophysique d’Île de France
https://www.leti-cea.fr/cea-tech/leti/Pages/Accueil.aspx
https://www.quantumsilicon-grenoble.eu/
Start date on 01-09-2021
SAUVAGEOT Jean-Luc
CEA
DRF/IRFU/DAP/LSIS
CEA-SaclayDRF-IRFU-DAP91191 Gif-sur-Yvette CEDEX
Phone number: 0169088052
Email: jean-luc.sauvageot@cea.fr
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