Multidimensional cosmology with anisotropic fluid: acceleration and variation of G
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A multidimensional cosmological model describing the dynamics of n+1
Ricci-flat factor-spaces M_i in the presence of a one-component anisotropic fluid is considered. The pressures in all spaces are proportional to the density: p_i = w_i ρ, i = 0,...,n. Solutions with accelerated expansion of our 3-space M_0 and small enough variation of the gravitational constant G are found. These solutions exist for two branches of the parameter w_0. The first branch describes superstiff matter with w_0 > 1, the second one may contain phantom matter with w_0 < - 1, e.g., when G grows with time.
6 pages, Latex, corrected typos, Proceedings of the International Conference on Gravitation, Cosmology, Astrophysics and Nonstationary Gas Dynamics, Dedicated to Prof. K.P. Staniukovich's 90th birthday, Moscow, 2-6 March 2006
6 pages, Latex, corrected typos, Proceedings of the International Conference on Gravitation, Cosmology, Astrophysics and Nonstationary Gas Dynamics, Dedicated to Prof. K.P. Staniukovich's 90th birthday, Moscow, 2-6 March 2006