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28 March 2024
 
  » arxiv » hep-th/0304048

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Cosmological Scaling Solutions and Multiple Exponential Potentials
Zong-Kuan Guo ; Yun-Song Piao ; Yuan-Zhong Zhang ;
Date 6 Apr 2003
Journal Phys.Lett. B568 (2003) 1-7
Subject hep-th
AbstractWe 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.
Source arXiv, hep-th/0304048
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