renormalization group flow

Renormalization group flow is a concept used in physics to understand how the behavior of a system changes as you look at it at different scales. Imagine examining a complex object, like a tangled piece of yarn, from far away versus up close. As you change your perspective, certain details become more or less important. The renormalization group helps scientists mathematically describe how physical laws evolve when you zoom in or out, revealing patterns and connections among different systems, such as understanding phase transitions in materials or the behavior of fundamental particles.