Back-Reaction: A Cosmological Panacea

Details Back-Reaction: A Cosmological Panacea Back-Reaction: A Cosmological Panacea

2005-10-18

arxiv.org/abs/astro-ph/0510523v1

Astronomy and Astrophysics

Astrophysics

6 pages

Scientific paper

We present a solution to the dark energy problem in terms of the Effective Energy Momentum Tensor (EMT) of cosmological perturbations. The approach makes use of the gravitational back-reaction of long wavelength (super-Hubble) fluctuation modes on the background metric. Our results indicate that, following preheating, the energy density associated with back-reaction is sub-dominant and behaves as a tracker during the radiation era. At the onset of matter domination, however, the effects of back-reaction begin to grow relative to the matter density and the associated equation of state quickly approaches that of a cosmological constant. Using standard values for the preheating temperature and the amplitude of the inflaton following preheating, we show that this mechanism leads to a very natural explanation of dark energy. We comment on other recent attempts to explain the dark energy using back-reaction and their relation to our work.

Affiliated with

Also associated with

No associations

Rating

Back-Reaction: A Cosmological Panacea 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 Back-Reaction: A Cosmological Panacea, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Back-Reaction: A Cosmological Panacea will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-193743