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- Title
Variational calculations of symmetric nuclear matter and pure neutron matter with the tensor-optimized Fermi Sphere (TOFS) method: many-body effects and short-range correlation.
- Authors
Yamada, Taiichi
- Abstract
The equations of state for symmetric nuclear matter and pure neutron matter are investigated with the tensor-optimized Fermi Sphere method (TOFS) up to the density ρ = 0.5 fm - 3 . This method is based on a linked-cluster expansion theorem, and the energy per particle of nuclear matter ( E / A ) is calculated variationally with respect to the correlated nuclear matter wave function. We can study the density dependence of the many-body terms arising from the operator products, which contribute to E / A . In order to clarify the relation between the many-body effects and short-range correlation, we take the spin-isospin dependent central NN interaction with a few GeV repulsion in the inner region. The EOS obtained by the TOFS method is reasonably reproduced, compared with other ab initio many-body methods. We found that the many-body terms (from the 2-body to 6-body ones) give sizable effects on E/A at higher density, and they play an important role in nuclear matter.
- Subjects
NUCLEAR matter; NEUTRONS; EQUATIONS of state; DE-Broglie waves; SPHERES
- Publication
European Physical Journal A -- Hadrons & Nuclei, 2024, Vol 60, Issue 3, p1
- ISSN
1434-6001
- Publication type
Article
- DOI
10.1140/epja/s10050-024-01267-w