Prospects in extended inflation
This work explores the various aspects in making a successful model of extended inflation, which should solve all the problems of the Standard Cosmology without creating new ones. Extended inflationary models are based on Brans-Dicke like theories. In the extended inflationary scenario, inflation occurs when the inflation field is trapped in a false vacuum bubbles. Nucleation probability of these true vacuum bubbles was studied. In the context of extended inflation, it was found that the nucleation rate can have very strong time dependence through the time dependence of the Brans-Dicke like field; this can have a pronounced effect on the percolation of true vacuum bubbles. Physical constraints on generalized extended inflationary models are derived. Finding that there are sizable portions in the parameter spaces of these theories that allow for good extended inflation. The effects of higher-order curvature terms on extended inflation are also examined. Lastly, a model is presented which makes use of the non linear realization of scale invariance, with the dilation coupled to the usual inflation potential.
- Research Organization:
- Carnegie-Mellon Univ., Pittsburgh, PA (United States)
- OSTI ID:
- 5257280
- Resource Relation:
- Other Information: Thesis (Ph.D)
- Country of Publication:
- United States
- Language:
- English
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