Structure formulas for wave operators
  We establish quantitative estimates on the structure function arising in the representation of the intertwining wave operators of a Schroedinger operator in three dimensions. Regularity of zero energy is assumed throughout. This paper is related to, and corrects some inaccuracies in, the first author's work https://arxiv.org/abs/1101.0502 
Marius Beceanu, Wilhelm Schlag
math.AP math-ph math.MP