Wilson's renormalization group

Wilson's renormalization group is a framework in physics that helps understand how systems behave across different length or energy scales. Imagine zooming out from a detailed picture to see a broader view; as you do so, fine details blend into the larger pattern. Wilson's method systematically removes small-scale details in complex systems, revealing underlying behaviors that remain consistent at larger scales. This approach explains why many physical properties are universal, unaffected by microscopic differences, and is fundamental in studying phase transitions and critical phenomena in materials.