Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2008-06-02
Phys.Rev.C79:054325,2009
Physics
Nuclear Physics
Nuclear Theory
20 pages, 4 figures, 1 table (v2: extended version in response to referees' comments)
Scientific paper
10.1103/PhysRevC.79.054325
Using the ground-state energy of 16-O obtained with the realistic V_UCOM interaction as a test case, we present a comprehensive comparison of different configuration interaction (CI) and coupled-cluster (CC) methods, analyzing the intrinsic advantages and limitations of each of the approaches. In particular, we use the importance-truncated (IT) CI and no-core shell model (NCSM) schemes with up to 4-particle-4-hole (4p4h) excitations as well as the size extensive CC methods with a complete treatment of one- and two-body clusters (CCSD) and a non-iterative treatment of connected three-body clusters via the completely renormalized correction to the CCSD energy defining the CR-CC(2,3) approach. We discuss the impact of the center-of-mass contaminations, the choice of the single-particle basis, and size-extensivity on the resulting energies. When the IT-CI and IT-NCSM methods include the 4p4h excitations and when the CC calculations include the 1p1h, 2p2h, and 3p3h clusters, as in the CR-CC(2,3) approach, we observe an excellent agreement among the different methodologies. This shows that despite their individual limitations, the IT-CI, IT-NCSM, and CC methods can provide precise and consistent ab initio nuclear structure predictions. Furthermore, the IT-CI, IT-NCSM, and CC ground-state energy values obtained with 16-O are in good agreement with the experimental value, proving that the V_UCOM two-body interaction allows for a realistic description of binding energies for heavier nuclei and that all of the methods used in this study account for most of the relevant particle correlation effects.
Gour Jeffrey R.
Piecuch Piotr
Roth Raphael
No associations
LandOfFree
Ab initio coupled-cluster and configuration interaction calculations for 16-O using V_UCOM does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Ab initio coupled-cluster and configuration interaction calculations for 16-O using V_UCOM, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ab initio coupled-cluster and configuration interaction calculations for 16-O using V_UCOM will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-632519