Schroedinger operators on exterior domains with Robin boundary   conditions: heat kernel estimates
  We study Schroedinger operators with Robin boundary conditions on exterior domains in $\R^d$. We prove sharp point-wise estimates for the associated semi-groups which show, in particular, how the boundary conditions affect the time decay of the heat kernel in dimensions one and two. Applications to spectral estimates are discussed as well. 
Hynek Kovarik, Delio Mugnolo
math.SP math-ph math.AP math.MP