k-Inflation

Details k-Inflation k-Inflation

1999-04-09

arxiv.org/abs/hep-th/9904075v1

Phys.Lett.B458:209-218,1999

Physics

High Energy Physics

High Energy Physics - Theory

LaTeX, 20 pages including 3 figures. Submitted to Phys. Lett. B

Scientific paper

10.1016/S0370-2693(99)00603-6

It is shown that a large class of higher-order (i.e. non-quadratic) scalar kinetic terms can, without the help of potential terms, drive an inflationary evolution starting from rather generic initial conditions. In many models, this kinetically driven inflation (or "k-inflation" for short) rolls slowly from a high-curvature initial phase, down to a low-curvature phase and can exit inflation to end up being radiation-dominated, in a naturally graceful manner. We hope that this novel inflation mechanism might be useful in suggesting new ways of reconciling the string dilaton with inflation.

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