Zero modes and low-energy resolvent expansion for three dimensional Schrodinger operators with point interactions
arXiv:1901.02449
Abstract
We investigate the low-energy behavior of the resolvent of Schrodinger operators with finitely many point interactions in three dimensions. We also discuss the occurrence and the multiplicity of zero energy obstructions.
Contribution to the Springer-INdAM volume "Mathematical Challenges of Zero-Range Physics"