The theory group has two partner institutions, the theory group of DESY Zeuthen and the John von Neuman institute.
The group is strongly linked both on a local and an international scale to several universities and other research institutions, including
- The Wolfgang Pauli Centre, which unites the various theory groups of Hamburg University and DESY in Hamburg
- Participation in the Collaborative Research Center SFB 676 granted by the German Science Foundation (DFG) and close cooperation with the II Institute for theoretical physics of Hamburg university.
- Strong links with the experimental groups at DESY , with the Institute for experimental physics of Hamburg university and with the Analysis Centre of the Helmholtz Alliance "Physics at the Terascale" .
- Participation in Hamburg's Center for Mathematical Physics.