Perturbation theory by the moment method and point-group symmetry
Quantum Physics
2014-09-16 v1
Abstract
We analyze earlier applications of perturbation theory by the moment method (also called inner product method) to anharmonic oscillators. For concreteness we focus on two-dimensional models with symmetry and and reveal the reason why some of those earlier treatments proved unsuitable for the calculation of the perturbation corrections for some excited states. Point-group symmetry enables one to predict which states require special treatment.
Keywords
Cite
@article{arxiv.1409.4120,
title = {Perturbation theory by the moment method and point-group symmetry},
author = {Francisco M. Fernández},
journal= {arXiv preprint arXiv:1409.4120},
year = {2014}
}