Ab initio calculations of medium-mass nuclei
Johannes Simonis (Mainz)

The calculation of nuclei as strongly correlated many-body systems based on nucleonic degrees of freedom is an intriguing challenge of nuclear structure theory. Recent developments in the derivation of nuclear forces within chiral effective field theory (EFT), rooted in the symmetries of quantum chromodynamics, and the emergence of systematically improvable many-body methods allow the calculation of light to medium-mass nuclei from chiral two- and three-nucleon forces. Using the in-medium similarity renormalization group (IM-SRG), I will study ground-state energies and charge radii of closed-shell nuclei from He-4 to Ni-78. Extending the calculations to open-shell nuclei in the sd and pf shells with the valence-space IM-SRG allows to study the formation of shell structure, the spectroscopy of exotic nuclei, and the location of the neutron drip line, enabling the comparison to experimental results obtained at rare isotope beam facilities. Moreover, I will present first calculations using the next-generation chiral EFT interactions.