effective action functional
In the context of quantum field theory an effective action is an object obtained from a more fundamental action functional by “averaging out” the dependency on certain variables.
There are two different notions of effective action
The one-particle irreducible action (“1PI action”);
The Wilsonian effective action of effective quantum field theory.
Wilsonian effective action
A discussion (with an eye towards supersymmetric quantum field theory and Seiberg duality) is in section 2.1 of
- Flip Tanedo, Notes on Seibergology (pdf)
A review of effective actions in the background field formalism is in section 3.1 of
- Darren Trevor Grasso, Higher order contributions to the effective action of and supersymmetric Yang-Mills theories from heat kernel techniques in superspace Thesis (2007) (web)
Revised on October 24, 2011 14:02:15
by Urs Schreiber