Billiard Representation for Multidimensional Cosmology with Multicomponent Perfect Fluid near the Singularity

Abstract

The multidimensional cosmological model describing the evolution of $n$ Einstein spaces in the presence of multicomponent perfect fluid is considered. When certain restrictions on the parameters of the model are imposed, the dynamics of the model near the singularity is reduced to a billiard on the $(n-1)$-dimensional Lobachevsky space $H^{n-1}$. The geometrical criterion for the finiteness of the billiard volume and its compactness is suggested. This criterion reduces the problem to the problem of illumination of $(n-2)$-dimensional sphere $S^{n-2}$ by point-like sources. Some generalization of the considered scheme (including scalar field and quantum generalizations) are considered.

16 pages, LaTex. 4 figures are available upon request (hard copy)

References in corpus (2)

• Multidimensional Cosmology with $m$-Component Perfect Fluid
• Multidimensional Classical and Quantum Wormholes in Models with Cosmological Constant

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