Coarse-Grained Effective Action and Renormalization Group Theory in Semiclassical Gravity and Cosmology

Details Coarse-Grained Effective Action and Renormalization Group Theory in Semiclassical Gravity and Cosmology Coarse-Grained Effective Action and Renormalization Group Theory in Semiclassical Gravity and Cosmology

2001-02-27

arxiv.org/abs/hep-th/0102199v1

Phys.Rept.352:459-520,2001

Physics

High Energy Physics

High Energy Physics - Theory

47 pages, 2 Figs, Latex. To appear in Physics Reports - Proceedings of RG2000, Taxco, 1999

Scientific paper

10.1016/S0370-1573(01)00043-6

In this report we introduce the basic techniques (of the Closed Time Path - Coarse Grained Effective Action CTP-CGEA) and ideas (scaling, coarse-graining and backreaction) behind the treatment of quantum processes in dynamical background spacetimes and fields. We show how they are useful for the construction of renormalization group (RG) theories for studying these nonequilibrium processes and discuss the underlying issues. Examples are drawn from quantum field processes in an inflationary universe, semiclassical cosmology and stochastic gravity. In Part I we show how eternal inflation can be treated as static critical phenomena, while a `slow-roll' or power-law inflation can be treated as dynamical critical phenomena. In Part II we introduce the key concepts in open systems and discuss the relation of coarse-graining and backreaction. In Part III we present the CTP - CGEA. We perform perturbative and nonperturbative evaluations, and show how to derive RG equations. In Part IV, we use the RG equations to derive the Einstein-Langevin equation in stochastic semiclassical gravity. We end with a discussion on why a stochastic component of RG equations is expected for nonequilibrium processes

Affiliated with

Also associated with

No associations

Rating

Coarse-Grained Effective Action and Renormalization Group Theory in Semiclassical Gravity and Cosmology does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Coarse-Grained Effective Action and Renormalization Group Theory in Semiclassical Gravity and Cosmology, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coarse-Grained Effective Action and Renormalization Group Theory in Semiclassical Gravity and Cosmology will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-563420