Inflation without Slow Roll

Details Inflation without Slow Roll Inflation without Slow Roll

1997-12-12

arxiv.org/abs/gr-qc/9712061v2

Phys.Rev.Lett. 80 (1998) 3440-3443

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

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

Scientific paper

10.1103/PhysRevLett.80.3440

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 \phi . This phenomenon takes place when a mild non-convexity inequality is satisfied by the potential V(\phi). The presence of such a period of \phi-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.

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