Inflation driven by particle creation

Details Inflation driven by particle creation Inflation driven by particle creation

2011-08-15

arxiv.org/abs/1108.3040v2

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

Some discussions and references added

Scientific paper

The creation of ultra-light dark particles in the late-time FLRW spacetime provides a cosmological model in accordance with precise observational tests. The matter creation backreaction implies in this context a vacuum energy density scaling linearly with the Hubble parameter H, which is consistent with the vacuum expectation value of the QCD condensate in a low-energy expanding spacetime. Both the cosmological constant and coincidence problems are alleviated in this scenario. We also explore the opposite, high energy limit of the particle creation process. We show that it leads to a non-singular primordial universe where an early inflationary era takes place, with natural reheating and exit. The generated primordial spectrum is scale invariant and, by supposing that inflation lasts for 60 e-folds, we obtain a scalar expectral index n = 0.97.

Affiliated with

Also associated with

No associations

Rating

Inflation driven by particle creation 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 Inflation driven by particle creation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Inflation driven by particle creation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-302239