Charge and spin dynamics in a hybrid circuit QED architecture
Jérémie Viennot (LPA)

Abstract

This thesis investigates experimentally the coupling mechanism of the charge and spin degrees of freedom in double quantum dots to high -finesse superconducting microwave cavities. We use carbon nanotubes as a coherent conductor to host our quantum dots. We conceived an experimental setup and developed new fabrication methods in order to achieve control over these devices. With these methods, we scrutinize the resonant coupling of the dot’s charge electronic transitions to a microwave cavity. We drive the system out of equilibrium to characterise its dynamics and extract its relevant intrinsic parameters. We examine a possible coupling of single photons to a single electron spin, using non-collinear exchange -fields induced from ferromagnetic interfaces as a key ingredient to engineer this coupling. The preliminary results in this circuit architecture are promising for future spin-based QED experiments with single spins.