Some Cosmological Models with Negative Potentials
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We investigate some cosmological models where the effective potential V (ϕ) may become negative for some values of field ϕ. Cosmological evolution in models with a minimum at V (ϕ) < 0 is similar in some respects to the evolution in models with potentials unbounded from below. In this case, instead of reaching an AdS regime dominated by the negative vacuum energy, the universe may reach a turning point where its energy density vanishes, and then it contracts to a singularity. In some cases such models may lead to a bounce.
KeywordsCosmological model Negative Potential Bounce
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- 3.A. R. Liddle and D. H. Lyth, Cosmological Inflation and Large Scale Structure, Cambrige University Press, 2000.Google Scholar
- 4.G. Fedler, A. Frolov, L. Kofman et al., LITA-2002-2004, hepth/0202017 Cosmology with Negative potentials, 2004.Google Scholar
- 6.A. D. Linde, JHEP. 0111, 052. [arxiv: hep-th/0110195] Fast-roll Inflation, 2001.Google Scholar
- 7.A. de la Macorra, G. Germin, [arxiv: astro-ph/0212148] Cosmology for scalar fields with negative potentials and ωϕ < –1, 2002.Google Scholar
- 8.R. Kallosh, A. D. Linde, S. Prokushkin et al., arxiv: hepth/0110089, 2001.Google Scholar
- 9.G. Felder, A. Frolov, and L. Kofmani, arxiv:hep-th/0112165. warped geometry of brane worlds, 2001.Google Scholar
- 10.P. J. Steinhardt, N. Turok, arxiv:hep-th/0111030. A cyclic model of the universe, 2001.Google Scholar
- 11.J. Khoury, B. A. Ovrut, P. J. Steinhardt et al., arxiv:hep-th/0103239: The Ekpyrotic Universe: The colliding branes and the origin of hot big bang, 2001.Google Scholar
- 13.P. J. Steinhardt, N. Turok, Endless Universe, Doubleday, New York, 2007.Google Scholar