Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1999-04-09
J.Math.Phys.41:6341-6363,2000
Physics
High Energy Physics
High Energy Physics - Theory
27 pages Latex, 3 figs., submit. to Class. Quantum Grav
Scientific paper
10.1063/1.1286671
Multidimensional model describing the cosmological evolution of n Einstein spaces in the theory with l scalar fields and forms is considered. When electro-magnetic composite p-brane ansatz is adopted, and 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, N = n+l. The geometrical criterion for the finiteness of the billiard volume and its compactness is used. This criterion reduces the problem to the problem of illumination of (N-2)-dimensional sphere by point-like sources. Some examples with billiards of finite volume and hence oscillating behaviour near the singularity are considered. Among them examples with square and triangle 2-dimensional billiards (e.g. that of the Bianchi-IX model) and a 4-dimensional billiard in ``truncated'' D = 11 supergravity model (without the Chern-Simons term) are considered. It is shown that the inclusion of the Chern-Simons term destroys the confining of a billiard.
Ivashchuk Vladimir D.
Melnikov Vitaly N.
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