Rellich's theorem and N-body Schrodinger operators
  We show an optimal version of the Rellich theorem for generalized many-body Schrodinger operators. It applies to singular potentials, in particular to a model for atoms and molecules with infinite mass and finite extent nuclei. Our proof relies on a Mourre estimate and a functional calculus localization technique. 
K. Ito, E. Skibsted
math-ph math.FA math.MP