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An inflationary scenario taking into account of possible dark energy effects in the early universe

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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 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.

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Authors and Affiliations

  1. Institute of High Energy Physics, Chinese Academy of Sciences, 100049, Beijing, China

    Zhe Chang & Ming-Hua Li

  2. Theoretical Physics Center for Science Facilities, Chinese Academy of Sciences, 100049, Beijing, China

    Xin Li & Sai Wang

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  1. Zhe Chang
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  2. Ming-Hua Li
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  3. Xin Li
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  4. Sai Wang
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Correspondence to Ming-Hua Li.

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Chang, Z., Li, MH., Li, X. et al. An inflationary scenario taking into account of possible dark energy effects in the early universe. Eur. Phys. J. C 72, 1915 (2012). https://doi.org/10.1140/epjc/s10052-012-1915-3

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