On the Hellmann-Feynman theorem for degenerate states
Quantum Physics
2019-12-11 v1
Abstract
In this paper we discuss the validity of the Hellmann-Feynman theorem (HFT) for degenerate states. We derive it in a general way and apply it to simple illustrative examples. We also analyze a recent paper that shows results that apparently suggest that the HFT does not apply to degenerate states.
Cite
@article{arxiv.1912.04876,
title = {On the Hellmann-Feynman theorem for degenerate states},
author = {Francisco M. Fernández},
journal= {arXiv preprint arXiv:1912.04876},
year = {2019}
}