Soft Gravitons Screen Couplings in de Sitter Space

Details Soft Gravitons Screen Couplings in de Sitter Space Soft Gravitons Screen Couplings in de Sitter Space

2012-03-02

arxiv.org/abs/1203.0391v1

Physics

High Energy Physics

High Energy Physics - Theory

22pages, 1 figure

Scientific paper

The scale invariance of the quantum fluctuations in de Sitter space leads to the appearance of de Sitter symmetry breaking infra-red logarithms in the graviton propagator. We investigate physical effects of soft gravitons on the local dynamics of matter fields well inside the cosmological horizon. We show that the IR logarithms do not spoil Lorentz invariance in scalar and Dirac field theory. The leading IR logarithms can be absorbed by a time dependent wave function renormalization factor in the both cases. In the interacting field theory with $\lambda \phi^4$ and Yukawa interaction, we find that the couplings become time dependent with definite scaling exponents. We argue that the relative scaling exponents of the couplings are gauge invariant and physical as we can use the evolution of a coupling as a physical time.

Affiliated with

Also associated with

No associations

Rating

Soft Gravitons Screen Couplings in de Sitter Space 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 Soft Gravitons Screen Couplings in de Sitter Space, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Soft Gravitons Screen Couplings in de Sitter Space will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-166010