Cosmological Scaling Solutions and Multiple Exponential Potentials

Preprint

17 June 2003

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.hep-th/0304048

Abstract

We present a phase-space analysis of cosmology containing multiple scalar fields with positive and negative exponential potentials. We show that there exist power-law multi-kinetic-potential scaling solutions for sufficiently flat positive potentials or steep negative potentials. The former is the unique late-time attractor and the well-known assisted inflationary solution, but the later is never unstable in an expanding universe. Moreover, for steep negative potentials there exist a kinetic-dominated regime in which each solution is a late-time attractor. We briefly discuss the physical consequences of these results.

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All Related Versions

Version 1, 2003-04-06, ArXiv
Version 2, 2003-05-22, ArXiv
Version 3, 2003-06-17, ArXiv
Published version: Physics Letters B, 568 (1-2), 1.

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