PRE-INFLATION IN THE PRESENCE OF CONFORMAL COUPLING
Keyword(s):
Big Bang
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We consider a massless scalar field, conformally coupled to the Ricci scalar curvature, in the pre-inflation era of a closed FLRW Universe. The scalar field potential can be of the form of the Coleman–Weinberg one-loop potential, which is flat at the origin and drives the inflationary evolution. For positive values of the conformal parameter ξ, less than the critical value ξ c =(1/6), the model admits exact solutions with nonzero minimum scale factor and zero initial Hubble parameter. Thus these solutions can be matched smoothly to the so-called Pre-Big-Bang models. At the end of this pre-inflation era one can match inflationary solutions by specifying the form of the potential and the whole solution is of the class C(1).
1993 ◽
Vol 08
(04)
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pp. 723-752
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Keyword(s):
2005 ◽
Vol 14
(06)
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pp. 1049-1061
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2012 ◽
Vol 83
(2)
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pp. 115-117
Keyword(s):
Keyword(s):