On the initial conditions for inflation with plateau potentials: the R plus R-2 (super)gravity case
| Autoři | |
|---|---|
| Rok publikování | 2015 |
| Druh | Článek v odborném periodiku |
| Časopis / Zdroj | JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS |
| Fakulta / Pracoviště MU | |
| Citace | |
| www | Journal website |
| Obor | Teoretická fyzika |
| Klíčová slova | HIGHER-DERIVATIVE SUPERGRAVITY; MINIMAL SUPERGRAVITY; AUXILIARY FIELDS; MODELS; UNIVERSE; MATTER; PARADIGM |
| Popis | 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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