Inflaton field governed universe from NKK theory of gravity: stochastic approach

We study a non-perturbative single field (inflaton) governed cosmological model from a 5D non-compact Kaluza-Klein (NKK) theory of gravity. The inflaton field fluctuations are estimated for different epochs of the evolution of the universe. We conclude that the inflaton field has been sliding down i...

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Bibliographic Details
Published in:The European physical journal. C, Particles and fields Particles and fields, 2006-01, Vol.45 (1), p.249-256
Main Authors: Anabitarte, M., Aguilar, J. E. M., Bellini, M.
Format: Article
Language:English
Subjects:
Acceleration
Astronomical models
Big Bang theory
Cosmology
Evolution
Gravitation
Order parameters
Universe
Variations
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Summary:We study a non-perturbative single field (inflaton) governed cosmological model from a 5D non-compact Kaluza-Klein (NKK) theory of gravity. The inflaton field fluctuations are estimated for different epochs of the evolution of the universe. We conclude that the inflaton field has been sliding down its (quadratic) potential hill along the whole evolution of the universe and a mass is involved of the order of the Hubble parameter. In the model here developed the only free parameter is the Hubble parameter, which could be reconstructed in the future from Super Nova Acceleration Probe (SNAP) data.
ISSN:1434-6044
1434-6052
DOI:10.1140/epjc/s2005-02404-9