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

Bogner, S. K.; Furnstahl, R. J.; Hergert, H.; Kortelainen, M.; Maris, P.; Stoitsov, M.; Vary, J. P.

doi:10.1103/physrevc.84.044306

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

Journal Article · Sat Oct 01 00:00:00 EDT 2011 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/physrevc.84.044306· OSTI ID:1564885

Bogner, S. K.; Furnstahl, R. J.; Hergert, H.; Kortelainen, M.; Maris, P.; Stoitsov, M.; Vary, J. P.

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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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); Iowa State Univ., Ames, IA (United States); Univ. of Tennessee, Knoxville, TN (United States); Michigan State Univ., East Lansing, MI (United States); TENNESSEE UNIVERSITY OF; Yale Univ., New Haven, CT (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

DOE Contract Number:: FC02-09ER41582; FC02-09ER41583; FC02-09ER41585; FG02-07ER41529; FG02-87ER40371; FG02-96ER40963; FG05-87ER40361; FG02-09ER41581

OSTI ID:: 1564885

Journal Information:: Physical Review. C, Nuclear Physics, Vol. 84, Issue 4; ISSN 0556-2813

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

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