S-Matrix Poles Close to Thresholds in Confined Geometries
Mesoscale and Nanoscale Physics
2009-11-13 v1
Abstract
We have studied the behavior of the S-matrix poles near threshold for quantum waveguides coupled to a cavity with a defect. We emphasize the occurrence of both dominant and shadow poles on the various sheets of the energy Riemann surface, and show that the changes of the total conductivity near threshold as the cavity's width changes can be explained in terms of dominant to shadow pole transitions.
Keywords
Cite
@article{arxiv.0706.3783,
title = {S-Matrix Poles Close to Thresholds in Confined Geometries},
author = {G. Cattapan and P. Lotti},
journal= {arXiv preprint arXiv:0706.3783},
year = {2009}
}