The Extreme Light Infrastructure (ELI) program initiated by the EU and of which Hungary is the main participants is expected/considered to be the most promising project concerning the development of extreme high intensity lasers. The Nuclear Physics division of ELI will be the first research infrastructure in the world to be able to investigate on the experimental level the interactions between light and matter by applying such laser equipment that provide the highest intensity. It provides actuality to deepen, expand and improve our knowledge on the subject, which already has a significant past. To understand what impact such intensive coherent electromagnetic fields might have on nuclear processes is one of the current aspirations.

In the recent years many articles have been published about laser-assisted nuclear decay processes in particular alpha-decay, although there are still a lot of open questions. Based on this, one of the main tasks of the PhD candidate is to investigate the alpha-decay process in the presence of extreme intense electromagnetic fields (plane wave and pulsed field cases) within the framework of the non-Hermitian quantum mechanical formalism and Floquet-formalism (generally (t,t')-formalism) with various 1 and 3 dimensional nuclear potentials. The second task is formulating a model to describe the beta-decay with special regards to the EC-process in the presence of an extreme high intensity coherent-electromagnetic field using quantum field theoretical approaches.