834. WE-Heraeus-Seminar: Superconducting Quantum Circuits Meet Quantum Materials

This seminar is devoted to discuss recent developments in the field of mesoscopic superconductivity with a focus on  superconducting hybrid devices realized with quantum materials. These systems often consist of hybrids of superconducting and nonsuperconducting materials. In these systems unexpected phenomena such as gate controllability of the supercurrents, the superconducting diode effect or the presence of peculiar superconducting phases (e.g. in twisted bilayer graphene) among other have been observed. At variance to earlier studies the constituents now include superconductors which are unconventional themselves, magnetic systems, semiconducting systems, and these are hybridized with electronically complex nonsuperconducting counterparts to tailor the properties of the resulting quantum circuits. A second aspect is the enormous recent progress in the measurement techniques that now give access to superconducting properties that before were only conceptually known. These include the measurement of the superconducting stiffness, or the heat released by a single phase slip event. The field of mesoscopic superconductivity is marked by a tight exchange between experimental and theoretical progress. In this seminar the experimental results are discussed in combination with theoretical studies and predictions using the most modern methods of non-equilibrium quantum field theory.