New preprint: "Beyond Born-Oppenheimer Green's function theories: absolute and relational"

Here, we consider the central aspects that distinguish different many-body Green’s function theories of Coulomb interaction. We find interesting connections of our Green’s function theories to various aspects of modern physics. We connect the differences in the various Green’s function theories to the ancient debate about the absolute versus relational description of nature. This manuscript is to appear in the Journal of Physics: Conference Series (2025), proceedings of DICE2024. The link to the preprint: https://arxiv.org/abs/2503.01417.