10.18453/rosdok_id00001296 Kapoor, Varun Varun Kapoor http://d-nb.info/gnd/104754931X Universität Rostock 2014 530 Physics 2014 en http://purl.uni-rostock.de/rosdok/id00001296 urn:nbn:de:gbv:28-diss2014-0048-4 The ab initio solution of the time-dependent Schrödinger equation for a many-body system is feasible for only a few constituents. Success of TDDFT when it comes to highly correlated electron dynamics is very limited. In this thesis, the exact exchange-correlation potential for the highly correlated process of autoionization is constructed. One may try to employ the time-periodicity of external drivers. If this could also be applied to the time-dependent Kohn-Sham equation the time-dependent many-body problem could be reduced to a time-independent one. It is investigated if this is possible.