How to renormalize coupled cluster theory
Nuclear Theory
2024-02-16 v1
Abstract
Coupled cluster theory is an attractive tool to solve the quantum many-body problem because its singles and doubles (CCSD) approximation is computationally affordable and yields about 90% of the correlation energy. Capturing the remaining 10%, e.g. via including triples, is numerically expensive. Here we assume that short-range three-body correlations dominate and - following Lepage [How to renormalize the Schr\"odinger equation, arXiv:nucl-th/9706029] - that their effects can be included within CCSD by renormalizing the three-body contact interaction. We renormalize this contact in O and obtain accurate CCSD results for O, Ne, Ca, Ni, Zr, and Sn.
Cite
@article{arxiv.2205.12990,
title = {How to renormalize coupled cluster theory},
author = {Z. H. Sun and C. A. Bell and G. Hagen and T. Papenbrock},
journal= {arXiv preprint arXiv:2205.12990},
year = {2024}
}
Comments
7 pages, 4 figures