Dynamics and perturbations in assisted chaotic inflation

Details Dynamics and perturbations in assisted chaotic inflation Dynamics and perturbations in assisted chaotic inflation

1999-10-27

arxiv.org/abs/hep-ph/9910499v1

Phys.Rev. D61 (2000) 123513

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, revtex, 2 figures

Scientific paper

10.1103/PhysRevD.61.123513

On compactification from higher dimensions, a single free massive scalar field gives rise to a set of effective four-dimensional scalar fields, each with a different mass. These can cooperate to drive a period of inflation known as assisted inflation. We analyze the dynamics of the simplest implementation of this idea, paying particular attention to the decoupling of fields from the slow-roll regime as inflation proceeds. Unlike normal models of inflation, the dynamics does not become independent of the initial conditions at late times. In particular, we estimate the density perturbations obtained, which retain a memory of the initial conditions even though a homogeneous, spatially-flat Universe is generated.

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