1. Center for Gravitation and Fundamental Metrology, VNIIMS, 46 Ozyornaya Str., Moscow 119361, Russia; 2. Institute of Gravitation and Cosmology, People’s Friendship University of Russia, 6 Mikhlukho-Maklaya Str., Moscow 117198, Russia
A review of different cosmological models in diverse dimensions leading to a relatively small time variation in the effective gravitational constant G is presented. Among them: the 4-dimensional (4-D) general scalar-tensor model, the multidimensional vacuum model with two curved Einstein spaces, the multidimensional model with the multicomponent anisotropic “perfect fluid”, the S-brane model with scalar fields and two form fields, etc. It is shown that there exist different possible ways of explaining relatively small time variations of the effective gravitational constant G compatible with present cosmological data (e.g. acceleration): 4-dimensional scalar-tensor theories or multidimensional cosmological models with different matter sources. The experimental bounds on G may be satisfied either in some restricted interval or for all allowed values of the synchronous time variable.
Corresponding Author(s):
N. MELNIKOV Vitaly,Email:melnikov@phys.msu.ru, melnikov@vniims.ru
引用本文:
. Models of G time variations in diverse dimensions[J]. Frontiers of Physics, 2009, 4(1): 75-93.
Vitaly N. MELNIKOV. Models of G time variations in diverse dimensions. Front. Phys. , 2009, 4(1): 75-93.
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