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Heteroclinic orbit and tracking attractor in cosmological model with a double exponential potential | | Xin-zhou Li
; Yi-bin Zhao
; Chang-bo Sun
; | | Date: |
1 Aug 2005 | | Journal: | Class.Quant.Grav. 22 (2005) 3759-3766 | | Subject: | astro-ph gr-qc hep-th | | Abstract: | In this paper, the dynamical heteroclinic orbit and attractor have been employed to make the late-time behaviors of the model insensitive to the initial condition and thus alleviates the fine tuning problem in cosmological dynamical system of barotropic fluid and quintessence with a double exponential potential. The late-time asymptotic behavior of the double exponential model does not always correspond to the single case. The heteroclinic orbits are the non-stationary solutions and in general they will interpolate between the critical points. Although they can not be shown analytically, yet a numerical calculation can reveal most of their properties. Varied heteroclinic orbits and attractors including tracking attractor and de Sitter attractor have been found. | | Source: | arXiv, astro-ph/0508019 | | Services: | Forum | Review | PDF | Favorites | |
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