Cosmology from Moduli Dynamics

Details Cosmology from Moduli Dynamics Cosmology from Moduli Dynamics

2004-07-08

arxiv.org/abs/hep-th/0407063v3

JHEP0408:053,2004

Physics

High Energy Physics

High Energy Physics - Theory

38 pages, 6 figures; references added

Scientific paper

10.1088/1126-6708/2004/08/053

We investigate moduli field dynamics in supergravity/M-theory like set ups where we turn on fluxes along some or all of the extra dimensions. As has been argued in the context of string theory, we observe that the fluxes tend to stabilize the squashing (or shape) modes. Generically we find that at late times the shape is frozen while the radion evolves as a quintessence field. At earlier times we have a phase of radiation domination where both the volume and the shape moduli are slowly evolving. However, depending on the initial conditions and the parameters of the theory, like the value of the fluxes, curvature of the internal manifold and so on, the dynamics of the internal manifold can be richer with interesting cosmological consequences, including inflation.

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