The parity modulation of the ground state of a superconducting island is a direct
consequence of the presence of the Cooper-pair condensate preferring an even number of …

The fundamental excitations in superconductors—Bogoliubov quasiparticles—can be either
a resource or a liability in superconducting devices: they are what enables photon detection …

In superconducting quantum circuits, aluminum is one of the most widely used materials. It is
currently also the superconductor of choice for the development of topological qubits …

The combination of nontrivial topology, magnetism, and superconductivity could offer the
potential to realize exotic excitations of quasiparticles. MnBi2Te4, as an intrinsic magnetic …

Many bottom-up and top-down techniques for nanomaterial and nanostructure generation
have enabled the development of applications in nanoelectronics and nanophotonics …

How small can superconductors be? For isolated nanoparticles subject to quantum size
effects, PW Anderson in 1959 conjectured that superconductivity could only exist when the …

We present experiments on single Cooper-pair transistors made of two different
superconducting materials. We chose Ti and Al to create an energy gap profile such that the …

The work presented in this thesis was performed in the alternative qubits group at IBM
Research Europe-Zurich. The results of three projects are presented in the following. In …

A flow of electric current in a metal is the result of the collective motion of mobile conduction
electrons within a relatively static background formed by ionized atoms. An electric current of …

We introduce a toy model that allows us to study the physical properties of a spin impurity
coupled to the electrons in the superconducting island. We show that, when the coupling of …