Renormalization Group Theory

Renormalization Group Theory is a framework used in physics to understand how systems behave across different scales, especially near critical points like phase transitions. It examines how physical properties change when you zoom in or out, gradually averaging out small details to focus on large-scale behavior. This approach helps identify universal patterns and critical exponents that apply across diverse systems, revealing underlying simplicity amid complexity. Essentially, it’s a tool for studying how microscopic interactions influence macroscopic phenomena as you change your observational scale.