Can infrared gravitons screen $Λ$?

Details Can infrared gravitons screen $Λ$? Can infrared gravitons screen $Λ$?

2007-06-03

arxiv.org/abs/0706.0295v2

Phys.Rev.D77:024021,2008

Physics

High Energy Physics

High Energy Physics - Theory

15 pages, added references and comments to arXiv:0708.2004[hep-th] with some minor corrections

Scientific paper

10.1103/PhysRevD.77.024021

It has been suggested that infrared gravitons in de Sitter space may lead to a secular screening of the effective cosmological constant. This seems to clash with the naive expectation that the curvature scalar should stay constant due to the Heisenberg equation of motion. Here, we show that the tadpole correction to the local expansion rate, which has been used in earlier analyses as an indicator of a decaying effective $\Lambda$, is not gauge invariant. On the other hand, we construct a gauge invariant operator which measures the renormalized curvature scalar smeared over an arbitrary window function, and we find that there is no secular screening of this quantity (to any given order in perturbation theory).

Affiliated with

Also associated with

No associations

Rating

Can infrared gravitons screen $Λ$? 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 Can infrared gravitons screen $Λ$?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Can infrared gravitons screen $Λ$? will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-688696