https://doi.org/10.1140/epjc/s2005-02404-9
Theoretical Physics
Inflaton field governed universe from NKK theory of gravity: stochastic approach
1
Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, (7600) Mar del Plata, 3350, Funes, Argentina
2
Instituto de Física y Matemáticas, AP: 2-82, (58040) Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán, México
3
Consejo Nacional de Ciencia y Tecnología (CONICET), Argentina
* e-mail: anabitar@mdp.edu.ar
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.
© Springer-Verlag, 2006
