k-Inflation
1999/04/09 by C. Armendáriz-Picón, C. Armendariz-Picon, Cristian Armendariz-Picon +4 · 226 citations
Economics, Econometrics and Finance · Physics and Astronomy · #Cosmology and Gravitation Theories #Stochastic processes and financial applications #astro-ph #gr-qc #hep-th
paper · pdf · doi:10.1016/s0370-2693(99)00603-6
published as Phys.Lett.B458:209-218,1999 · LaTeX, 20 pages including 3 figures. Submitted to Phys. Lett. B
arxiv created 1999/04/09 · openalex publication_date 1999/07/01 · arxiv updated 2009/11/30 · openalex created_date 2020/07/02 · openalex updated_date 2026/07/30
Abstract
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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