Hole spin cQED has emerged as a new promising platform not only for quantum information processing but also for the study of fundamental light-matter interaction and analog quantum simulation. Our group has recently demonstrated large cooperativities between a single hole spin in a gate-define quantum dot in silicon and a photon in a microwave cavity [1]. Based on this achievement, the project will be on one hand to push the current light-matter interaction strengths to its extreme and study fundamental physics questions (ultra-strong and superstrong coupling regimes for example)[2] and on the other hand to leverage the photon as a quantum bus for long-distant spin-spin entanglement. Spin cQED with multiple spins coupled to the same microwave resonator naturally implement an all-to-all connectivity allowing for the study of various spin and impurity models. In addition, multi-cavity systems will be used to precisely engineer the environment of the spin to control and simulate bosonic baths in order to implement an analog quantum simulator [3] to answer longstanding questions of many-body physics.
[1] Yu*, Zihlmann* et al. Nature Nanotechnol. 2023
[2] Forn-Diaz et al. Phys. Rev. Mod 2019
[3] Kim et al. PRX Quantum 3, 040308 (2022)

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Dr. Simon Zihlmann, simon.zihlmann@cea.fr

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