Laurenz Rettig formerly headed the research group “Dynamics of Correlated Materials” in our deopartment and has now been appointed as a professor at the Rheinland-Pfälzische Technische Universität (RPTU) in Kaiserslautern on January 1st, 2026. The aim of his group is to understand complex interaction phenomena in solids, for instance between electrons and lattice or spin excitations combining various complementary ultrafast investigation methods, in particular, time- and angle-resolved photoemission spectroscopy and momentum microscopy. Another focus are experiments on dynamics of magnetic materials, including experiments on large-scale research facilities. In Kaiserslautern will focus on ultrafast optical control of quantum materials using a combination of different methods and ülans to expand on these, for example, with spin- and time-resolved photoemission.