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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 | 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. | Source: | arXiv, hep-th/0304048 | Services: | Forum | Review | PDF | Favorites |
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