# nLab effective action functional

Contents

this entry is about the concept of quantumfield theory, for the concept in group theory/representation theory see at effective group action; for disambiguation see effective action

# Contents

## Idea

In the context of (perturbative) quantum field theory an effective action is an object obtained from a more fundamental (interaction) action functional by “averaging out” certain dependencies.

## References

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 $\mathcal{N} = 2$ and $4$ supersymmetric Yang-Mills theories from heat kernel techniques in superspace Thesis (2007) (web)

Last revised on April 5, 2020 at 10:13:31. See the history of this page for a list of all contributions to it.