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arXiv · 2305.07577

Coupled-cluster theory for strong entanglement in nuclei

Z. H. Sun·G. Hagen·T. Papenbrock
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Abstract

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.

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Z. H. Sun, G. Hagen, T. Papenbrock. 2023-05-12. Coupled-cluster theory for strong entanglement in nuclei. https://doi.org/10.1103/physrevc.108.014307

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