Seminar Details

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 [3]. 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. [1] K. Tsukiyama, S. Bogner, A. Schwenk, Phys. Rev. Lett. 106, 222502 (2011) [2] H. Hergert et al., Phys. Rev. C 87, 034307 (2013) [3] H. Hergert et al., Phys. Rev. Lett. 110, 242501 (2013) [4] K. Tsukiyama, S. Bogner, A. Schwenk, Phys. Rev. Lett. 106, 222502 (2011) [5] S. Bogner, H. Hergert, J. Holt, A. Schwenk, in preparation.