The research of the "Artificial Photosynthesis" group focusses on the modeling and simulation of chemical reactivity. The emphasis is put on multiscale modeling frameworks linking the knowledge from sub-nanometer scale simulations of bond making and bond breaking with meso- or macroscopic models. For this, we employ and develop a number of different computational methods. Currently, we work on stochastic simulation, sparse grids, tensor networks and the numerical solution of partial differential equations.