In theoretical physics, particularly in the context of quantum field theory and statistical mechanics, the concept of "effective action" refers to a functional that encapsulates the dynamics of a system after integrating out (or averaging over) certain degrees of freedom. The effective action is especially useful in situations where one is interested in the long-range or low-energy behavior of a system while neglecting the details of high-energy or short-range components.
Articles by others on the same topic
There are currently no matching articles.