Graviton propagator in de Sitter space

Details Graviton propagator in de Sitter space Graviton propagator in de Sitter space

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986phrvd..34.3670a&link_type=abstract

Physical Review D (Particles and Fields), Volume 34, Issue 12, 15 December 1986, pp.3670-3675

Physics

47

Classical General Relativity

Scientific paper

We consider the graviton propagator in a de Sitter background. The propagator depends upon the choice of a gauge-fixing term Lgauge=1/2F2, and we consider the ``ɛ gauges'' with Fv=∇u(huv-ɛguvhσ σ). We show that the propagator is completely finite and has no infrared divergences provided that ɛ is not given certain ``exceptional'' values. It is only for these ``exceptional'' values of ɛ that the propagator has an infrared divergence. We then show that in these exceptional cases the divergences are gauge artifacts and are not physical: they make no contribution to any physical tree-level scattering amplitudes. Furthermore, we show that at one-loop order the zero modes which arise (only) if ɛ is given one of the exceptional values are canceled by the Faddeev-Popov ghosts. There is thus no evidence that the de Sitter background is inconsistent when gravitational fluctuations are considered.

Affiliated with

Also associated with

No associations

Rating

Graviton propagator 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 Graviton propagator in de Sitter space, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Graviton propagator in de Sitter space will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1127441