Medium-Mass Nuclei with Normal-Ordered Chiral NN+3N Interactions
Abstract
We study the use of truncated normal-ordered three-nucleon interactions in nuclear structure calculations starting from chiral two- plus three-nucleon Hamiltonians evolved consistently with the similarity renormalization group. We present three key developments: (i) a rigorous benchmark of the normal-ordering approximation in the importance-truncated no-core shell model for He4, O16, and Ca40; (ii) a direct comparison of the importance-truncated no-core shell model results with coupled-cluster calculations at the singles and doubles level for O16; and (iii) first applications of similarity renormalization group-evolved chiral NN+3N Hamiltonians in coupled-cluster calculations for medium-mass nuclei O16,24 and Ca40,48. We show that the normal-ordered two-body approximation works very well beyond the lightest isotopes and opens a path for studies of medium-mass and heavy nuclei with chiral two- plus three-nucleon interactions. At the same time we highlight the predictive power of chiral Hamiltonians.
- Publication:
-
Physical Review Letters
- Pub Date:
- August 2012
- DOI:
- 10.1103/PhysRevLett.109.052501
- arXiv:
- arXiv:1112.0287
- Bibcode:
- 2012PhRvL.109e2501R
- Keywords:
-
- 21.60.De;
- 21.30.-x;
- 05.10.Cc;
- 21.45.Ff;
- Ab initio methods;
- Nuclear forces;
- Renormalization group methods;
- Three-nucleon forces;
- Nuclear Theory
- E-Print:
- 5 pages, 5 figures