An Inflationary Scenario Taking into Account of Possible Dark Energy Effects in the Early Universe

Details An Inflationary Scenario Taking into Account of Possible Dark Energy Effects in the Early Universe An Inflationary Scenario Taking into Account of Possible Dark Energy Effects in the Early Universe

2011-05-18

arxiv.org/abs/1105.3509v3

The European Physical Journal C, Volume 72, Number 3, 1915

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

17 pages, 3 figuires

Scientific paper

10.1140/epjc/s10052-012-1915-3

We investigate the possible effect of cosmological-constant type dark energy during the inflation period of the early universe. This is accommodated by a new dispersion relation in de Sitter space. The modified inflation model of a minimally-coupled scalar field is still able to yield an observation-compatible scale-invariant primordial spectrum, simultaneously having potential to generate a spectrum with lower power at large scales. A qualitative match to the WMAP 7-year data is presented. We obtain an $\Omega_\Lambda$ of the same order of that in the $\Lambda$-CDM model. Possible relations between the de Sitter scenario and the Doubly Special Relativity(DSR) are also discussed.

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