Solid state quantum computing and quantum sensing technologies are based on the strong coupling between qubits and a quantized field of excitations. Besides photons, the solid state offers a wide variety of bosonic excitations that can be emitted or absorbed such as, e.g., magnons, the quantum version of spin waves.
Magnonic cavities offer the advantage of operating at reduced wavelengths compared to electromagnetic resonators of the same frequency. In our group, we investigate the integration of magnonic cavities based on topological magnetic solitons as, e.g., magnetic vortices. The latter are extremely stable magnetic textures exhibiting a very rich dynamical behavior in the sub-GHz to tens of GHz range. We focus on the coupling of individual spin qubits to vortex cavities for sensing and quantum computing applications.
This research line builds on a strong collaboration between experimentalists and theoreticians from QMAD. We are leaders in designing and fabricating superconducting circuits for the implementation of cavities and read-out electronics for quantum amplification. Our team is also an expert in the growth of magnetic materials for magnonic applications and their integration into quantum superconducting circuits. Our facilities include access to a clean room, two cryogen-free dilution refrigerators, mw electronics and a cluster of GPU cards for numerical simulation.