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

Journal Article · Sat Jan 01 00:00:00 EST 2011 · Physical Review, C (Nuclear Physics)

OSTI ID:1037058

Bogner, S K ^[1]; Hergert, H ^[1]; Furnstahl, R J ^[2]; Kortelainen, Erno M ^[3]; Stoitsov, M V ^[4]; Maris, Pieter ^[5]; Vary, J P ^[5]

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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

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.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1037058
• Journal Information: Physical Review, C (Nuclear Physics), Vol. 84, Issue 4
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CONFIGURATION
DENSITY MATRIX
FUNCTIONALS
HARMONICS
IMPLEMENTATION
NEUTRONS
NUCLEAR ENERGY
TESTING