期刊
PHYSICAL REVIEW LETTERS
卷 118, 期 3, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.118.032502
关键词
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资金
- National Research Council Canada
- NSERC
- NUCLEI SciDAC Collaboration under U.S. Department of Energy [DE-SC0008533, DE-SC0008511]
- National Science Foundation [PHY-1404159]
- European Research Council [307986 STRONGINT]
- Deutsche Forschungsgemeinschaft [SFB 1245]
- BMBF [05P15RDFN1]
- U.S. Department of Energy (DOE) [DE-SC0008511] Funding Source: U.S. Department of Energy (DOE)
- Direct For Mathematical & Physical Scien
- Division Of Physics [1404159] Funding Source: National Science Foundation
We present a nucleus-dependent valence-space approach for calculating ground and excited states of nuclei, which generalizes the shell-model in-medium similarity renormalization group to an ensemble reference with fractionally filled orbitals. Because the ensemble is used only as a reference, and not to represent physical states, no symmetry restoration is required. This allows us to capture three-nucleon (3N) forces among valence nucleons with a valence-space Hamiltonian specifically targeted to each nucleus of interest. Predicted ground-state energies from carbon through nickel agree with results of other large-space ab initio methods, generally to the 1% level. In addition, we show that this new approach is required in order to obtain convergence for nuclei in the upper p and sd shells. Finally, we address the 1(+)/3(+) inversion problem in Na-22 and V-46. This approach extends the reach of ab initio nuclear structure calculations to essentially all light- and medium-mass nuclei.
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