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SUMMARY:Frame-Covariant Formulation of Inflation in Scalar-Curvature Theor
ies
DTSTART;VALUE=DATE-TIME:20160524T134000Z
DTEND;VALUE=DATE-TIME:20160524T140000Z
DTSTAMP;VALUE=DATE-TIME:20240921T010042Z
UID:indico-contribution-2885@indico.ific.uv.es
DESCRIPTION:Speakers: Sotirios Karamitsos (University of Manchester)\nInfl
ation has been very successful as a generic explanation of the origin of c
osmological anisotropies. However\, the development of more sophisticated
inflationary models\, such as scalar-curvature theories\, has led to chall
enges in extracting predictions for observable quantities. With the aim of
obtaining predictions from inflationary models in a concise and straightf
orward manner\, I will present the extension of the potential slow-roll ap
proximation which incorporates scalar-curvature theories and the derivatio
n of new\, generalized potential slow-roll parameters. From this\, I will
demonstrate how to extract predictions for cosmological observables for in
flationary models with a wide array of theoretical underpinnings. Furtherm
ore\, I will show that frame transformations (conformal transformations an
d inflaton reparametrizations) leave observable quantities invariant withi
n the extended slow-roll formalism. As a demonstration of its utility\, I
will apply it to induced gravity inflation\, Higgs inflation\, and F(R) mo
dels. I will thus show that results for observable quantities may be readi
ly obtained to greater accuracy than the usual strategy of approximating t
he potential after a frame transformation. Finally\, I will outline how th
e Vilkovisky-DeWitt formalism may be applied to scalar-tensor theories in
order to extend frame-covariance beyond the tree-level approximation.\n\nh
ttps://indico.ific.uv.es/event/2534/contributions/2885/
LOCATION:
URL:https://indico.ific.uv.es/event/2534/contributions/2885/
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