Combination of superconductors with one dimensional systems in the presence of spin-orbit interaction expected to create new state of matter, where topologically protected non-fermionic excitations exist. Recent theoretical works predict that the interplay of two one dimensional conductors via a superconductor could result even more peculiar structures like parafermions. In such a configuration the superconductor can hybridize the two conductors with crossed Andreev reflection process, where a Cooper-pair from the superconductor split to the two conductors. This special way of coupling play an important role in various interesting physical systems, like Andreev-molecule, TRITOPS or parafermions.

In this diploma work, the applicant will develop novel superconducting hybrid nanodevices, made out of double InAs nanowires. The starting point of the sample fabrication is a novel nanowire growth product, in which two InAs wires are grown next to each other and they are connected by epitaxial grown Al shell. Quantum devices with two separated normal contact to the wires will be fabricated and the superconducting behavior will be explored by ultralow temperature transport measurements. The Applicant will explore the role of Crossed Andreev reflection and search for the existence of novel states.