Nonlinear multidimensional gravity and the Australian dipole

Abstract

The existing observational data on possible variations of fundamental physical constants (FPC) confirm more or less confidently only a variability of the fine structure constant $\alpha$ in space and time. A model construction method is described, where variations of $\alpha$ and other FPCs (including the gravitational constant $G$) follow from the dynamics of extra space-time dimensions in the framework of curvature-nonlinear multidimensional theories of gravity. An advantage of this method is a unified approach to variations of different FPCs. A particular model explaining the observable variations of $\alpha$ in space and time has been constructed. It comprises a FRW cosmology with accelerated expansion, perturbed due to slightly inhomogeneous initial data.

15 pages, 1 figure. Comments and references added

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Cited by in corpus (6)

• Inhomogeneous compact extra dimensions
• On Time Variations of Gravitational and Yang-Mills Constants in a Cosmological Model of Superstring Origin
• Classical evolution of subspaces
• Fundamental physical constants: current results in search for variations and their description
• Evolution of sub-spaces at high and low energies
• Constraints on scalar coupling to electromagnetism