Coupled cluster calculations of ground and excited states of nuclei

Details Coupled cluster calculations of ground and excited states of nuclei Coupled cluster calculations of ground and excited states of nuclei

2003-10-30

arxiv.org/abs/nucl-th/0310082v1

Phys.Rev.Lett. 92 (2004) 132501

Physics

Nuclear Physics

Nuclear Theory

Scientific paper

10.1103/PhysRevLett.92.132501

The standard and renormalized coupled cluster methods with singles, doubles, and noniterative triples and their generalizations to excited states, based on the equation of motion coupled cluster approach, are applied to the He-4 and O-16 nuclei. A comparison of coupled cluster results with the results of the exact diagonalization of the Hamiltonian in the same model space shows that the quantum chemistry inspired coupled cluster approximations provide an excellent description of ground and excited states of nuclei. The bulk of the correlation effects is obtained at the coupled cluster singles and doubles level. Triples, treated noniteratively, provide the virtually exact description.

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