Fundamentals of scattering theory and resonances in quantum mechanics
Author
Hislop, Peter D.
Full text
https://revistas.ufro.cl/ojs/index.php/cubo/article/view/132810.4067/S0719-06462012000300001
Abstract
We present the basics of two-body quantum-mechanical scattering theory and the theory of quantum resonances. The wave operators and S-matrix are constructed for smooth, compactly-supported potential perturbations of the Laplacian. The meromorphic continuation of the cut-off resolvent is proved for the same family of Schrödinger operators. Quantum resonances are defined as the poles of the meromorphic continuation of the cut-off resolvent. These are shown to be the same as the poles of the meromorphically continued S-matrix. The basic problems of the existence of resonances and estimates on the resonance counting function are described and recent results are presented.