## Research areas

- gauge theory, string theory
- algebraic geometry
- effective actions

String theory addresses one of the deepest problems of contemporary physics,
namely the reconciliation of gravity and quantum theory. It regularizes quantum
gravity, provides a perturbative expansion in the regime of small gravitational
coupling, and unifies the gravitational force with the forces of the standard
model of elementary particle physics. String dualities lead to non-perturbative
formulations of gauge theory and quantum gravity. As a consequence, black holes
have been successfully treated as quantum objects and serious efforts are made
toward a theory of quantum cosmology. The formulation of quantum gravity
requires a similar change of physical and mathematical concepts as the
development of quantum mechanics. This sparked an intense interaction between
physicists and mathematicians that lead to substantial contributions to both
fields.

[ Picture of the quintic from wikipedia.org. ]

## Contact

Bethe Center for Theoretical Physics

Physikalisches Institut

Nussallee 12

53115 Bonn

Germany

### Secretariat

P. Weiss weiss@th.physik.uni-bonn.de

P. Zündorf: zuendorf@th.physik.uni-bonn.de

D. Fassbender: fassbender@th.physik.uni-bonn.de

Tel.: +49 228 73 3247

Fax.: +49 228 73 3223