Inflation without Slow Roll

Abstract

We draw attention to the possibility that inflation (i.e. accelerated expansion) might continue after the end of slow roll, during a period of fast oscillations of the inflaton field ϕ. This phenomenon takes place when a mild non-convexity inequality is satisfied by the potential V(ϕ). The presence of such a period of ϕ-oscillation-driven inflation can substantially modify reheating scenarios. In some models the effect of these fast oscillations might be imprinted on the primordial perturbation spectrum at cosmological scales.

9 pages, Revtex, psfig, 1 figure, minor modifications, references added

References in corpus (1)

• Hybrid Inflation in Supergravity

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