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On the initial conditions for inflation with plateau potentials: the $R+R^2$ (super)gravity case

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arxiv 1502.01246 v3 pith:D3XVGODD submitted 2015-02-04 gr-qc hep-th

Ioannis Dalianis , Fotis Farakos This is my paper · ORCID
classification gr-qchep-th
keywords inflationconditionsinitialfieldsplateauproblemacausalauxiliary
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abstract

We discuss the initial conditions problem for inflation driven by the vacuum energy of a plateau potential, and in particular the Starobinsky inflation. We show that the supergravity embedding of the $R+R^2$ theory naturally decreases the size of the acausal homogeneity, required for the low-scale inflation to occur, thanks to the presence of the dynamical pure supergravitational "auxiliary" fields. We examine the evolution of the $R+R^2$ fields within a FLRW Universe. We also find a dependence of the initial conditions problem on the background spatial curvature.

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Cited by 1 Pith paper

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  1. The Scale Factor Potential Approach to Inflation

    gr-qc 2019-09 reject novelty 3.0 of 10

    The paper reparametrizes slow-roll inflation through a scale factor potential and constructs an example potential, but the chosen 60 e-fold branch is inconsistent with its own first-minimum end condition.

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