Publication Type
Journal
Journal Name
Physical Review C
Publication Date
Volume
106
Issue
6
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 16O and obtain systematically improved CCSD results for 24O, 20–34Ne, 40,48Ca, 78Ni, 90Zr, and 100Sn.
