A remark on imaginary part of resonance points
Spectral Theory
2018-12-21 v3 Mathematical Physics
Functional Analysis
math.MP
Abstract
In this paper we prove for rank one perturbations that negative two times reciprocal of the imaginary part of resonance point is equal to the rate of change of the scattering phase as a function of the coupling constant, where the coupling constant is equal to the real part of the resonance point. This equality is in agreement with Breit-Wigner formula from quantum scattering theory. For general relatively trace class perturbations, we also give a formula for the spectral shift function in terms of resonance points, non-real and real.
Keywords
Cite
@article{arxiv.1603.03498,
title = {A remark on imaginary part of resonance points},
author = {Nurulla Azamov and Tom Daniels},
journal= {arXiv preprint arXiv:1603.03498},
year = {2018}
}
Comments
6 pages, the new version includes a new theorem and its proof