Angular-momentum projection in coupled-cluster theory: structure of $^{34}$Mg
Nuclear Theory
2022-08-03 v1
Abstract
Single-reference coupled-cluster theory is an accurate and affordable computational method for the nuclear many-body problem. For open-shell nuclei, the reference state typically breaks rotational invariance and angular momentum must be restored as a good quantum number. We perform angular-momentum projection after variation and employ the disentangled coupled-cluster formalism and a Hermitian approach. We compare our results with benchmarks for Be and Ne using a two-nucleon interaction from chiral effective field theory and for -shell nuclei within the traditional shell model. We compute the rotational band in the exotic nucleus Mg and find agreement with data.
Keywords
Cite
@article{arxiv.2201.07298,
title = {Angular-momentum projection in coupled-cluster theory: structure of $^{34}$Mg},
author = {G. Hagen and S. J. Novario and Z. H. Sun and T. Papenbrock and G. R. Jansen and J. G. Lietz and T. Duguet and A. Tichai},
journal= {arXiv preprint arXiv:2201.07298},
year = {2022}
}
Comments
23 pages, 12 figures