Our research group applies and develops computational tools to understand light-induced processes in condensed matter. On the application side, the focus is on excited state reactions, especially in solvated molecules and chromophore-protein complexes that occur in nature. To this end, we apply multiscale methods that allow the calculation of systems with thousands of atoms. On the development side, the group is interested in computational tools that can accurately describe the excited states. The focus is on multireference methods that are flexible in describing the electronic wavefunction at critical points for excited state processes. Such critical points include
degeneracies of different electronic states, for example conical intersections.