In-Medium Similarity Renormalization Group for Nuclei: Recent Highlights and New Developments
- Heiko Hergert, Ohio State University
Tuesday, January 21, 11:00 AM - Theory Seminar
NSCL Seminar Room
The In-Medium Similarity Renormalization Group (IM-SRG) is a powerful new ab initio many-body method well-suited for nuclear calculations. It has been used with great success in describing ground-state energies of medium-mass nuclei based on state-of-the-art interactions from Chiral Effective Field Theory [1,2,3]. A highlight was the demonstration of the crucial importance of the chiral three-body interaction for a correct reproduction of the oxygen dripline physics in a consistent two-plus-three-body ab initio calculation .
On-going developments include IM-SRG ground-state calculations of pf-shell nuclei and beyond, as well as applications to excited states. For instance, the IM-SRG can be used to derive valence-shell interactions for the Many-body Shell Model [4,5], and the combined IM-SRG + Shell-Model calculations offer instant access to the ab initio spectroscopy of medium-mass nuclei, regardless of deformation. Recent successes in the description of nuclear spectra indicate that our approach maintains a transparent connection to the underlying chiral interactions while being competitive with calculations with phenomenological Shell Model interactions.
 K. Tsukiyama, S. Bogner, A. Schwenk, Phys. Rev. Lett. 106, 222502 (2011)  H. Hergert et al., Phys. Rev. C 87, 034307 (2013)  H. Hergert et al., Phys. Rev. Lett. 110, 242501 (2013)  K. Tsukiyama, S. Bogner, A. Schwenk, Phys. Rev. Lett. 106, 222502 (2011)  S. Bogner, H. Hergert, J. Holt, A. Schwenk, in preparation.