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Cosmic infinity: a dynamical system approach
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DOI：10.1088/1475-7516/2017/03/042.png)
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摘要
En 中文
Dynamical system techniques are extremely useful to study cosmology. It turns out that in most of the cases, we deal with finite isolated fixed points corresponding to a given cosmological epoch. However, it is equally important to analyse the asymptotic behaviour of the universe. On this paper, we show how this can be carried out for 3-form models. In fact, we show that there are fixed points at infinity mainly by introducing appropriate compactifications and defining a new time variable that washes away any potential divergence of the system. The richness of 3-form models allows us as well to identify normally hyperbolic non-isolated fixed points. We apply this analysis to three physically interesting situations: (i) a pre-inflationary era; (ii) an inflationary era; (iii) the late-time dark matter/dark energy epoch.
Keyword:
cosmic singularity
dark energy theory
dark matter theory
physics of the early universe
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IF:
5.9
论文数:
1.3W
被引数:
4.7W
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