Today, ultra-short laser pulses with very high field strengths and quantum light (e.g. single photon) sources are available. At the same time, nanostructures of various materials smaller than the de Broglie wavelength of the electron can be designed, so that quantum mechanical effects are particularly strong.
In this research field, the group deals with the theory of light-matter interaction. Many-particle effects, such as the electron-electron, electron-photon or electron-phonon interaction, play a major role.
We work with methods of quantum field theory and models for the spatial propagation of light fields. Since analytical solutions are not available for many problems, numerical simulations are an important part of the work.