Extended inflation from higher-dimensional theories

Details Extended inflation from higher-dimensional theories Extended inflation from higher-dimensional theories

Feb 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991phrvd..43..995h&link_type=abstract

Physical Review D (Particles and Fields), Volume 43, Issue 4, 15 February 1991, pp.995-1004

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We consider the possibility that higher-dimensional theories may, upon reduction to four dimensions, allow extended inflation to occur. We analyze two separate models. 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 nontrivial field configurations (monopole, Casimir, and fermion bilinear condensate effects) that yield a nontrivial potential for the radius of the internal space. We find that extended inflation does not occur in these models. We also find that the bubble nucleation rate in these theories is time dependent unlike the case in the original version of extended inflation.

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