Inflation without slow roll

Damour, Thibault; Mukhanov, Viatcheslav F.

doi:10.1103/PhysRevLett.80.3440

Inflation without slow roll

Thibault Damour
(
- IHES, Bures-sur-Yvette and
- Meudon Observ.
)
,
Viatcheslav F. Mukhanov
(
- Munich U.
)

Dec, 1997

9 pages

Published in:

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

e-Print:

gr-qc/9712061 [gr-qc]

DOI:

10.1103/PhysRevLett.80.3440

Report number:

IHES-P-97-65

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Abstract: (arXiv)

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.

Note:

9 pages, Revtex, psfig, 1 figure, minor modifications, references added Report-no: IHES/P/97/94

inflation
inflaton: oscillation
potential
spectrum: perturbation

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Figures(0)

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