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- Title
On the expanding phase of a singular bounce and intermediate inflation: The modified gravity description.
- Authors
Oikonomou, V. K.
- Abstract
We demonstrate that the intermediate inflation scenario is a singular inflation cosmology, with the singularity at the origin t = 0 being a pressure and energy density singularity and particularly a Type III singularity. Also, we show that the expanding phase of a singular bounce can be identical to the intermediate inflation scenario, if the singular bounce has a Type III singularity at the origin. For the intermediate inflation scenario we examine the cosmological implications on the power spectrum in the context of various forms of modified gravity. Particularly, we calculate the power spectrum in the context of F( R), F( G) Gauss-Bonnet gravity and also for F( T) gravity and we discuss the viability of each scenario by comparing the resulting spectral index with the latest observational data.
- Subjects
INFLATIONARY universe; NAKED singularities (Cosmology); ASTRONOMICAL observations; CELESTIAL mechanics; GRAVITY
- Publication
Modern Physics Letters A, 2017, Vol 32, Issue 10, p-1
- ISSN
0217-7323
- Publication type
Article
- DOI
10.1142/S0217732317500675