In this thesis I investigate the coherent electron transport in a nanowire with spin-orbit coupling. Spin orbit coupling is a relativistic effect resulting in a coupling between the spin of an electron and its motion in an electric field. While in atomic physics it explains the fine structure of the atomic spectrum, this effect is also relevant in various semiconductors (e.g. InSb or InAs), for spintronics applications. In particular, nanowires (NWs) with a strong Rashba spin orbit coupling (RSOC), are currently on the spotlight of the condensed matter community. Indeed the technological advances in NW gating allow to tune the RSOC.