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

TL;DR

This paper explores how dark energy effects during early universe inflation can modify primordial spectra, potentially aligning with observational data and suggesting links to Doubly Special Relativity.

Contribution

It introduces a new inflation model incorporating dark energy effects via a modified dispersion relation in de Sitter space, compatible with observations.

Findings

Model yields a scale-invariant spectrum compatible with observations

Potential to produce lower power at large scales

Obtains an $\

Abstract

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.