Physics-informed operator flows and observables
Friederike Ihssen, Jan M. Pawlowski · Physical review. D/Physical review. D. · 2026
We discuss physics-informed renormalization group flows (PIRGs) for general operators. We show that operator PIRGs provide comprehensive access to all correlation functions of the quantum field theory under investigation. The operator PIRGs can be seen as a completion of the PIRG approach, whose qualitative computational simplification and structural insights are now fully accessible for general applications. The potential of this setup is assessed within a simple analytic example of the zero-dimensional ϕ 4 -theory, for which the generating functions of the fundamental field are computed within a vertex expansion, using the one- to ten-point functions.