Testing the density matrix expansion against ab initio calculations of trapped neutron drops

Details Testing the density matrix expansion against ab initio calculations of trapped neutron drops Testing the density matrix expansion against ab initio calculations of trapped neutron drops

2011-06-17

arxiv.org/abs/1106.3557v1

Physics

Nuclear Physics

Nuclear Theory

10 pages, 5 figures

Scientific paper

Microscopic input to a universal nuclear energy density functional can be provided through the density matrix expansion (DME), which has recently been revived and improved. Several DME implementation strategies are tested for neutron drop systems in harmonic traps by comparing to Hartree-Fock (HF) and ab initio no-core full configuration (NCFC) calculations with a model interaction (Minnesota potential). The new DME with exact treatment of Hartree contributions is found to best reproduce HF results and supplementing the functional with fit Skyrme-like contact terms shows systematic improvement toward the full NCFC results.

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