Mesoscopic Superconductivity

Downscaling of conventional charge-based devices faces fundamental physical limitations related to the fluctuations, dissipation and current leakage as well as finite size effects at the nanoscale. Therefore, alternative device concepts are explored intensively. Recently, hybrid superconducting nanostructures attracted a tremendous interest, because this technology has the potential to overcome these limitations and even promises a new paradigm for quantum information processing devices. The practical realisation of such devices, however, requires a detailed understanding of the transfer and the dynamics of spin and charge currents between superconducting and other normal conducting or magnetic circuit elements as well as the coupling between spin and charge degrees of freedom in these systems.