Ab initio studies of correlations effects in exotic isotopes

Post Hatree-Fock methods from many-body theory are now capable to provide ab initio predictions of nuclei up to masses of A ~ 100 nucleons. Among these, I will concentrate on the self-consistent Green’s function approach (SCGF) that allows direct access to the nuclear spectral functions and the information on nuclear correlations contained in it. The SCGF was the first of such methods to be extended to open shell isotopes and has been used extensively to benchmark chiral nuclear interactions and to investigate the single-particle structure of neutron rich nuclei. I will further discuss the importance of knowing the spectral functions for understanding the response to neutrinos under the wide range of energies relevant to oscillation experiments.