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arxiv: 1812.11855 · v2 · pith:N6OXYQW2new · submitted 2018-12-26 · 🌀 gr-qc

Examples of stable exponential cosmological solutions with three factor spaces in EGB model with a Λ-term

classification 🌀 gr-qc
keywords exponentiallambdathreecosmologicaldescribemodelsolutionsstable
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We deal with Einstein-Gauss-Bonnet model in dimension $D$ with a $\Lambda$-term. We obtain three stable cosmological solutions with exponential behavior (in time) of three scale factors corresponding to subspaces of dimensions $(l_0,l_1,l_2) = (3, 4, 4), (3, 3, 2), (3, 4, 3)$ and $D = 12, 9, 11$, respectively. Any solution may describe an exponential expansion of $3$-dimensional subspace governed by Hubble parameter $H$. Two of them may also describe a small enough variation of the effective gravitational constant $G$ (in Jordan frame) for certain values of $\Lambda$.

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