https://doi.org/10.1140/epjc/s10052-012-1915-3
Regular Article - Theoretical Physics
An inflationary scenario taking into account of possible dark energy effects in the early universe
1
Institute of High Energy Physics, Chinese Academy of Sciences, 100049, Beijing, China
2
Theoretical Physics Center for Science Facilities, Chinese Academy of Sciences, 100049, Beijing, China
* e-mail: limh@ihep.ac.cn
Received:
17
October
2011
Revised:
6
January
2012
Published online:
2
March
2012
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 the 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 Doubly Special Relativity (DSR) are also discussed.
© Springer-Verlag / Società Italiana di Fisica, 2012