Coupled-cluster theory for strong entanglement in nuclei
Fuente:
arXiv
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| Autori principali: | , , |
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| Natura: | Preprint |
| Pubblicazione: |
2023
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| _version_ | 1866909106581798912 |
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| author | Sun, Z. H. Hagen, G. Papenbrock, T. |
| author_facet | Sun, Z. H. Hagen, G. Papenbrock, T. |
| contents | Atomic nuclei can exhibit shape coexistence and multi-reference physics that enters in their ground states, and to accurately capture the ensuing correlations and entanglement is challenging. We address this problem by applying single-reference coupled-cluster theory based on spherical and deformed reference states and the tailored coupled-cluster method. The latter combines configuration interaction to capture static correlations with coupled-cluster theory for dynamic correlations. We compute the atomic nuclei $^{12}$C, $^{28}$Si, and $^{56}$Ni and find that the tailored coupled-cluster method and the single-reference approach based on a deformed Hartree-Fock state yield the most accurate results. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2305_07577 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Coupled-cluster theory for strong entanglement in nuclei Sun, Z. H. Hagen, G. Papenbrock, T. Nuclear Theory Atomic nuclei can exhibit shape coexistence and multi-reference physics that enters in their ground states, and to accurately capture the ensuing correlations and entanglement is challenging. We address this problem by applying single-reference coupled-cluster theory based on spherical and deformed reference states and the tailored coupled-cluster method. The latter combines configuration interaction to capture static correlations with coupled-cluster theory for dynamic correlations. We compute the atomic nuclei $^{12}$C, $^{28}$Si, and $^{56}$Ni and find that the tailored coupled-cluster method and the single-reference approach based on a deformed Hartree-Fock state yield the most accurate results. |
| title | Coupled-cluster theory for strong entanglement in nuclei |
| topic | Nuclear Theory |
| url | https://arxiv.org/abs/2305.07577 |