RG flow

Type: Concept

As of November 2026, RG flow has been mentioned in one podcast episode on Simons Foundation (Jan 2026). Renormalization Group flow is essential for understanding the transition between different phases in QCD.

In theoretical physics, the renormalization group (RG) is a mathematical tool that allows systematic investigation into the changes in a physical system as it is viewed at different scales. The scales of the system typically describe the interactions of the objects; they may be variable ("running") couplings which measure the strength of various forces, mass parameters, or the size of the system. The renormalization group is related to scale invariance and conformal invariance, symmetries in whi