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Scientific paper
Apr 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990stin...9025916h&link_type=abstract
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Astronomical Models, Big Bang Cosmology, Gas-Liquid Interactions, Gravitation, Nucleation, Phase Transformations, Time Dependence, Bubbles, Condensates, Fermions, Monopoles, Scalars
Scientific paper
The possibility is considered that higher dimensional theories may, upon reduction to four dimensions, allow extended inflation to occur. Two separate models are analayzed. One is a very simple toy model consisting of higher dimensional gravity coupled to a scalar field whose potential allows for a first-order phase transition. The other is a more sophisticated model incorporating the effects of non-trivial field configurations (monopole, Casimir, and fermion bilinear condensate effects) that yield a non-trivial potential for the radius of the internal space. It was found that extended inflation does not occur in these models. It was also found that the bubble nucleation rate in these theories is time dependent unlike the case in the original version of extended inflation.
Holman Richard
Kolb Edward W.
Vadas Sharon L.
Wang Yadong
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