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Title: Ab Initio Description of Open-Shell Nuclei: Merging No-Core Shell Model and In-Medium Similarity Renormalization Group

Journal Article · · Physical Review Letters
 [1];  [1];  [2];  [1]
  1. Technische Univ. Darmstadt, Darmstadt (Germany). Inst. fur Kernphysik
  2. Michigan State Univ., East Lansing, MI (United States). NSCL/FRIB Lab. and Dept. of Physics and Astronomy
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We merge two successful ab initio nuclear-structure methods, the no-core shell model (NCSM) and the multireference in-medium similarity renormalization group (IM-SRG) to define a new many-body approach for the comprehensive description of ground and excited states of closed and open-shell nuclei. Building on the key advantages of the two methods—the decoupling of excitations at the many-body level in the IM-SRG and the access to arbitrary nuclei, eigenstates, and observables in the NCSM—their combination enables fully converged no-core calculations for an unprecedented range of nuclei and observables at moderate computational cost. We present applications in the carbon and oxygen isotopic chains, where conventional NCSM calculations are still feasible and provide an important benchmark. In conclusion, the effciency and rapid convergence of the new approach make it ideally suited for ab initio studies of the complete spectroscopy of nuclei up into the medium-mass regime.

Research Organization:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1544397
Alternate ID(s):
OSTI ID: 1351697
Journal Information:
Physical Review Letters, Vol. 118, Issue 15; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 48 works
Citation information provided by
Web of Science

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Cited By (5)

Driven similarity renormalization group for excited states: A state-averaged perturbation theory journal March 2018
Many-body calculations with deuteron based single-particle bases and their associated natural orbits journal April 2018
Nuclear Structure from the In-Medium Similarity Renormalization Group journal June 2018
A Minimal Nuclear Energy Density Functional text January 2017
Few- and many-nucleon systems with semilocal coordinate-space regularized chiral nucleon-nucleon forces text January 2018

Figures / Tables (4)

FIG. 1.(p. 3)figure FIG. 1.
FIG. 2.(p. 3)figure FIG. 2.
FIG. 3.(p. 4)figure FIG. 3.
FIG. 4.(p. 4)figure FIG. 4.

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