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

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 $Ω_Λ$ of the same order of that in the $Λ$-CDM model. Possible relations between the de Sitter scenario and the Doubly Special Relativity(DSR) are also discussed.

preprint2012arXivOpen access
Zhe ChangMing-Hua LiSai WangXin Li
astro-ph.COgr-qc
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Zhe ChangMing-Hua LiSai WangXin Li

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