On the initial conditions for inflation with plateau potentials: the R plus R-2 (super)gravity case
| Authors | |
|---|---|
| Year of publication | 2015 |
| Type | Article in Periodical |
| Magazine / Source | JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS |
| MU Faculty or unit | |
| Citation | |
| Web | Journal website |
| Field | Theoretical physics |
| Keywords | HIGHER-DERIVATIVE SUPERGRAVITY; MINIMAL SUPERGRAVITY; AUXILIARY FIELDS; MODELS; UNIVERSE; MATTER; PARADIGM |
| Description | 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+R2 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+R2 fields within a FLRW Universe. We also find a dependence of the initial conditions problem on the background spatial curvature. |
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