##
Theory Department

### Theoretical Condensed Matter Physics

**Hartmut Monien**

My research encompasses a broad range of theoretical methods from
phenomenology for extracting experimental information and returning
useful information to
the experimentalists to topics of purely theoretical interest like the
stability of the Fermi liquid state in the gauge field theories with
current - current interactions.

Currently a major part of my work is devoted to developing novel
computational methods for quantum lattice models. Most interesting
problems in condensed
matter theory are connected with strong coupling and/or multiple energy
scales (e.g. the Mott phase transition) and are therefore very hard to handle
analytically. To
obtain more detailed analytical insight, and eventually get quantitative
understanding, computational physics is needed. But even today with all
the progress in
computer hardware, brute force use of computer power is very limited -
now is the time to develop sophisticated algorithms which exploit the
physics of the
problem in much more detail.

23. Oktober 2000

www@th.physik.uni-bonn.de