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

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.
Authors:
 [1] ;  [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [5]
  1. Michigan State University, East Lansing
  2. Ohio State University
  3. ORNL
  4. University of Tennessee, Knoxville (UTK) & Oak Ridge National Laboratory (ORNL)
  5. Iowa State University
Publication Date:
OSTI Identifier:
1037058
DOE Contract Number:
DE-AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review, C (Nuclear Physics); Journal Volume: 84; Journal Issue: 4
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; CONFIGURATION; DENSITY MATRIX; FUNCTIONALS; HARMONICS; IMPLEMENTATION; NEUTRONS; NUCLEAR ENERGY; TESTING