# Contactar Robertus Josephus Hendrikus Potting

# Robertus Josephus Hendrikus Potting

* Keywords:* theoretical particle physics; gravitation; space-time symmetries

I obtained my Master's degree at Utrecht University (Netherlands) in 1984, Ph.D. from Rutgers University (NJ, U.S.A.) in 1988, was post-doctoral researcher at Universite Libre de Bruxelles (Belgium) and at Indiana University (IN, U.S.A.) before moving to the University of the Algarve in 1992.

My Ph.D. research was in the area of string theory, on the canonical structure of string field theory. String theory is an attempt to unify all matter and interactions, including gravity, in a single theory. It has as the main characteristic that it assumes particles are one-dimensional objects (strings), rather than points, with a characteristic length scale of the order of the Planck length (~10^{-33} cm). In the context of string field theory his recent research has been in the area of possible experimentally observable "stringy" signals. One intriguing example here would be the possibility that Lorentz and CPT invariance (guaranteed in "ordinary" particle theories, but not in string theory) not be exact symmetries of nature.

Currently I am interested in:

- observable effects of a possible breaking of CPT and/or Lorentz symmetry in Nature, for instance in particle physics experiments, astrophysics or cosmology.
- alternative models of gravity