From closed shells to open shells: Coupled-cluster calculations of atomic nuclei
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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866908940413960192 |
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| author | Marino, F. Bonaiti, F. Demol, P. Bacca, S. Duguet, T. Hagen, G. Jansen, G. R. Papenbrock, T. Tichai, A. |
| author_facet | Marino, F. Bonaiti, F. Demol, P. Bacca, S. Duguet, T. Hagen, G. Jansen, G. R. Papenbrock, T. Tichai, A. |
| contents | Coupled-cluster theory is a powerful tool for first-principles calculations of atomic nuclei, enabling accurate predictions of nuclear observables across the Segrè chart. While coupled-cluster computations are especially efficient at shell closures, extensions have been developed to tackle open-shell nuclei, by exploiting the equation-of-motion method or by expanding the coupled-cluster wave function on top of a symmetry-breaking (either deformed or superfluid) reference state. In this study, we provide a comprehensive comparison of these different formulations applied to the calcium and nickel isotopes using nuclear two- and three-body interactions from chiral effective field theory. Based on ground-state energies, two-neutron separation energies, and two-neutron shell gaps, different coupled-cluster computations - based on symmetry-broken reference states and equation-of-motion techniques - offer consistent descriptions of bulk properties across medium-mass isotopic chains. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_17311 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | From closed shells to open shells: Coupled-cluster calculations of atomic nuclei Marino, F. Bonaiti, F. Demol, P. Bacca, S. Duguet, T. Hagen, G. Jansen, G. R. Papenbrock, T. Tichai, A. Nuclear Theory Nuclear Experiment Coupled-cluster theory is a powerful tool for first-principles calculations of atomic nuclei, enabling accurate predictions of nuclear observables across the Segrè chart. While coupled-cluster computations are especially efficient at shell closures, extensions have been developed to tackle open-shell nuclei, by exploiting the equation-of-motion method or by expanding the coupled-cluster wave function on top of a symmetry-breaking (either deformed or superfluid) reference state. In this study, we provide a comprehensive comparison of these different formulations applied to the calcium and nickel isotopes using nuclear two- and three-body interactions from chiral effective field theory. Based on ground-state energies, two-neutron separation energies, and two-neutron shell gaps, different coupled-cluster computations - based on symmetry-broken reference states and equation-of-motion techniques - offer consistent descriptions of bulk properties across medium-mass isotopic chains. |
| title | From closed shells to open shells: Coupled-cluster calculations of atomic nuclei |
| topic | Nuclear Theory Nuclear Experiment |
| url | https://arxiv.org/abs/2512.17311 |