Inflation without Slow Roll

Thibault Damour and Viatcheslav F. Mukhanov
Phys. Rev. Lett. 80, 3440 – Published 20 April 1998
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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 nonconvexity 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.

  • Received 12 December 1997

DOI:https://doi.org/10.1103/PhysRevLett.80.3440

©1998 American Physical Society

Authors & Affiliations

Thibault Damour

  • Institut des Hautes Etudes Scientifiques, 91440 Bures-sur-Yvette, France
  • and DARC, CNRS-Observatoire de Paris, 92195 Meudon, France

Viatcheslav F. Mukhanov

  • Theoretische Physik, Ludwig-Maximilians-Universität, Theresienstrasse 37, D-80333 München, Germany

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Vol. 80, Iss. 16 — 20 April 1998

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