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Title: Alternative similarity renormalization group generators in nuclear structure calculations

Journal Article · · Physical Review C, Nuclear Physics
 [1];  [2];  [3]
  1. Univ. of Ottawa, Ottawa, ON (Canada). Dept. of Physics; TRIUMF, Vancouver, BC (Canada)
  2. Univ. of British Columbia, Vancouver, BC (Canada). Dept. of Physics and Astronomy; TRIUMF, Vancouver, BC (Canada)
  3. TRIUMF, Vancouver, BC (Canada)
+ Show Author Affiliations

The similarity renormalization group (SRG) has been successfully applied to soften interactions for ab initio nuclear calculations. In almost all practical applications in nuclear physics, an SRG generator with the kinetic energy operator is used. With this choice, a fast convergence of many-body calculations can be achieved, but at the same time substantial three-body interactions are induced even if one starts from a purely two-nucleon (NN) Hamiltonian. Three-nucleon (3N) interactions can be handled by modern many-body methods. However, it has been observed that when including initial chiral 3N forces in the Hamiltonian, the SRG transformations induce a non-negligible four-nucleon interaction that cannot be currently included in the calculations for technical reasons. Consequently, it is essential to investigate alternative SRG generators that might suppress the induction of many-body forces while at the same time might preserve the good convergence. Here in this work we test two alternative generators with operators of block structure in the harmonic oscillator basis. In the no-core shell model calculations for 3H, 4He, and 6Li with chiral NN force, we demonstrate that their performances appear quite promising.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF)
Sponsoring Organization:
USDOE Office of Science (SC); National Research Council Canada
Grant/Contract Number:
401945-2011
OSTI ID:
1565212
Journal Information:
Physical Review C, Nuclear Physics, Vol. 90, Issue 3; ISSN 0556-2813
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 6 works
Citation information provided by
Web of Science

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Cited By (1)

Scale dependence of deuteron electrodisintegration text January 2017

Figures / Tables (20)

FIG. 1(p. 3)figure FIG. 1
FIG. 2(p. 5)figure FIG. 2
FIG. 3(p. 5)figure FIG. 3
FIG. 4(p. 6)figure FIG. 4
FIG. 5(p. 6)figure FIG. 5
FIG. 6(p. 7)figure FIG. 6
FIG. 7(p. 7)figure FIG. 7
FIG. 8(p. 7)figure FIG. 8
FIG. 9(p. 8)figure FIG. 9
TABLE I(p. 8)table TABLE I
FIG 11(p. 9)figure FIG 11
FIG. 10(p. 9)figure FIG. 10
FIG. 12(p. 10)figure FIG. 12
FIG. 13(p. 10)figure FIG. 13
TABLE II(p. 10)table TABLE II
FIG. 14(p. 11)figure FIG. 14
FIG. 15(p. 11)figure FIG. 15
TABLE III(p. 11)table TABLE III
FIG. 16(p. 12)figure FIG. 16
FIG. 17(p. 12)figure FIG. 17

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