Inflation and non-minimal scalar-curvature coupling in gravity and supergravity

Abstract

Inflationary slow-roll dynamics in Einstein gravity with a non-minimal scalar-curvature coupling can be equivalent to that in the certain f(R) gravity theory. We review the correspondence and extend it to N=1 supergravity. The non-minimal coupling in supergravity is rewritten in terms of the standard (`minimal') N=1 matter-coupled supergravity by using curved superspace. The established equivalence between two different inflationary theories means the same inflaton scalar potential, and does not imply the same post-inflationary dynamics and reheating.

18 pages, no figures, LaTeX. minor changes, references added, the version published in JCAP. arXiv admin note: substantial text overlap with arXiv:1201.2239, arXiv:1011.0240

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