Semiconducting nanowires have become one of the most intensively researched materials in the field of quantum electronics in recent years. InAs or InSb nanowires have a number of interesting properties: they have strong spin-orbit interactions, can be used to create quantum dots and can be coupled to superconducting and ferromagnetic electrodes. Thanks to these properties, they are used in a variety of applications in quantum information science: spin-orbit or Andreev qubits or by coupling quantum dots via crossed Andreev reflection and tuning the device parameters, exotic particles so-called Majorana Fermions can be formed. The Majorana fermions are predicted to enable long lifetime qubits in different architectures, e.g. in Kitaev transmons.

The aim of this thesis is to create nanocircuits built from nanowire-based quantum dots and couple them to superconducting circuits.  The confining potential of the quantum dots will be generated by local gate electrodes. Besides transport measurements these devices will be coupled to RF architectures both for readout and for manipulation. The candidate will design circuits based on semiconductor nanowires, fabricate them and characterize them at ultra-low temperatures. The research will be carried out in close collaboration with several international partner institutes.