Is perturbative study of ground-state correlations valid?
Nuclear Theory
2023-03-28 v3
Abstract
Perturbative approaches have often been used to include the effects of ground-state correlations in extended theories of the random-phase approximation. Validity of such approaches is investigated for a solvable model where comparison with exact solutions can be made. It is pointed out that there is a case where perturbative approaches give good results in spite of the fact that interaction strength is far beyond a perturbative region.
Keywords
Cite
@article{arxiv.2006.09561,
title = {Is perturbative study of ground-state correlations valid?},
author = {Mitsuru Tohyama},
journal= {arXiv preprint arXiv:2006.09561},
year = {2023}
}
Comments
6 pages,11 figures