1105.3509 (Zhe Chang et al.)

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

Zhe Chang, Ming-Hua Li, Sai Wang, Xin Li

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.

View original: http://arxiv.org/abs/1105.3509