Many-body calculations with deuteron based single-particle bases and their associated natural orbits
Articolo
Data di Pubblicazione:
2018
Citazione:
Many-body calculations with deuteron based single-particle bases and their associated natural orbits / G. Puddu. - In: PHYSICA SCRIPTA. - ISSN 0031-8949. - 93:6(2018 Jun). [10.1088/1402-4896/aabbf3]
Abstract:
We use the recently introduced single-particle states obtained from localized deuteron wavefunctions
as a basis for nuclear many-body calculations. We show that energies can be
substantially lowered if the natural orbits (NOs) obtained from this basis are used. We use this
modified basis for 10B, 16O and 24Mg employing the bare NNLOopt nucleon–nucleon interaction.
The lowering of the energies increases with the mass. Although in principle NOs require a full
scale preliminary many-body calculation, we found that an approximate preliminary many-body
calculation, with a marginal increase in the computational cost, is sufficient. The use of natural
orbits based on an harmonic oscillator basis leads to a much smaller lowering of the energies for
a comparable computational cost.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
nuclear many-body problems; ab initio methods; single-particle bases
Elenco autori:
G. Puddu
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