Extended inflation and generalised scalar-tensor theories

Details Extended inflation and generalised scalar-tensor theories Extended inflation and generalised scalar-tensor theories

Sep 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991phlb..267..330b&link_type=abstract

Physics Letters B, Volume 267, Issue 3, p. 330-336.

Physics

17

Scientific paper

We study the class of Bergmann-Wagoner scalar-tensor theories from the viewpoint of dynamical systems theory. We relate this to the currently popular extended inflation models. We show that under a certain class of perturbation, these models are structurally stable (i.e., the global nature of the phase portrait of the dynamical system does not change); we also find a more general class of perturbations which make the system structurally unstable. The form of these pertubations is related to a possible potential term for the scalar field coupling to gravity.
Permanent address: Department of Mathematics, Statistics and Computing Science, Dalhousie University, Halifax, Nova Scotia, Canada B3H 3JS.

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