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 (arXiv:nucl-th/9706029)—that their effects can be included within CCSD by renormalizing the three-body contact interaction. We renormalize this contact in and obtain systematically improved CCSD results for , and .
- Received 27 May 2022
- Accepted 10 November 2022
DOI:https://doi.org/10.1103/PhysRevC.106.L061302
©2022 American Physical Society