Does string theory lead to extended inflation?

Details Does string theory lead to extended inflation? Does string theory lead to extended inflation?

May 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991nuphb.355..146c&link_type=abstract

Nuclear Physics B, Volume 355, Issue 1, p. 146-161.

Physics

Nuclear Physics

75

Scientific paper

We consider the relationship between string theory and currently proposed models of extended inflation. In doing so, we discuss the conformal actions in string theory and in Jordan-Brans-Dicke gravity. We show explicitly the equivalence of pictures in which either gauge or gravitational couplings are changing with time. We demonstrate that the existence of the dilation in string theory does not naturally lead to extended inflation as currently discussed. We also discuss the resolution of the graceful exit problem of old inflation in Einstein gravity using either power-law inflation, or exponential inflation with a changing bubble formation rate.
On leave of absence from School of Physics and Astronomy, University of Minnesota, Minneapolis, MN 55455, USA.

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