Below is the ascii version of the abstract for 13-92. The html version should be ready soon.

Nils Berglund, S\'ebastien Dutercq
The Eyring--Kramers law for Markovian jump processes with symmetries
(629K, PDF)

ABSTRACT.  We prove an Eyring-Kramers law for the small eigenvalues and mean 
first-passage times of a metastable Markovian jump process which is invariant under a group of symmetries. Our results show that the usual Eyring-Kramers law for asymmetric processes has to be corrected by a factor computable in terms of stabilisers of group orbits. Furthermore, the symmetry can produce additional Arrhenius exponents and modify the spectral gap. The results are based on representation theory of finite groups.