Speaker
Description
The nuclear shell structure serves as the backbone for exploring the complex nuclear structure that emerges from nucleon-nucleon interactions. In recent years, it has become the forefront for both experimental and theoretical research in nuclear physics. Recent studies indicate that the shell structure is altered by the extreme proton-to-neutron number ratio in neutron-rich exotic nuclei, a phenomenon known as {\it shell evolution}. Shell evolution plays a vital role in understanding nuclear shell structures across the nuclear chart. In this context, we have investigated the shell structures using the state-of-the-art ab initio valence-space in-medium similarity renormalization group (VS-IMSRG) approach. Over the past two decades, chiral effective field theory has become a powerful framework for deriving nuclear forces from first principles. We employ modern two- and three-nucleon interactions derived from chiral effective field theory, using spin-tensor decomposition to examine the impact of individual interaction components. I will discuss the development of shell structures by analyzing the roles of two-nucleon (2N) and three-nucleon (3N) tensor forces.