The research unit is interested in the theoretical and mathematical description of the fundamental interactions. In particular we are interested in Einstein's theory of gravity (e.g. black holes and theoretical cosmology), in its possible extensions to dimensions different than four and, eventually, in the study of a consistent theory of quantum gravity. These efforts lead naturally to models such as string theory, where all interaction are unified. In this context, we use and develop novel techniques in quantum field theory (e.g. renormalization and anomalies) and in supersymmetry. Another problem is the one of non perturbative aspects of gauge theories (supersymmetric or not), which should explain the origin of mass and confinement in QCD.
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