Exact CTP Renormalization Group Equation for the Coarse Grained Effective Action
High Energy Physics - Theory
2014-11-18 v2
Abstract
We consider a scalar field theory in Minkowski spacetime and define a coarse grained Closed Time Path (CTP) effective action by integrating quantum fluctuations of wavelengths shorter than a critical value. We derive an exact CTP renormalization group equation and solve it using a derivative expansion approach. Explicit calculation is performed for the theory. We discuss the relevance of the CTP average action in the study of non-equilibrium aspects of phase transitions in quantum field theory.
Cite
@article{arxiv.hep-th/9605024,
title = {Exact CTP Renormalization Group Equation for the Coarse Grained Effective Action},
author = {Diego A. R. Dalvit and Francisco D. Mazzitelli},
journal= {arXiv preprint arXiv:hep-th/9605024},
year = {2014}
}
Comments
RevTeX file, 2 Postscript figures. Final version published in Phys. Rev. D - Equation (23) revised, and minor changes included