Multidimensional Gravity with Einstein Internal Spaces

Details Multidimensional Gravity with Einstein Internal Spaces Multidimensional Gravity with Einstein Internal Spaces

1996-12-05

arxiv.org/abs/hep-th/9612054v1

Grav.Cosmol. 2 (1996) 211-220

Physics

High Energy Physics

High Energy Physics - Theory

10 pages, LaTex

Scientific paper

A multidimensional gravitational model on the manifold $M = M_0 \times \prod_{i=1}^{n} M_i$, where M_i are Einstein spaces ($i \geq 1$), is studied. For $N_0 = dim M_0 > 2$ the $\sigma$ model representation is considered and it is shown that the corresponding Euclidean Toda-like system does not satisfy the Adler-van-Moerbeke criterion. For $M_0 = R^{N_0}$, $N_0 = 3, 4, 6$ (and the total dimension $D = dim M = 11, 10, 11$, respectively) nonsingular spherically symmetric solutions to vacuum Einstein equations are obtained and their generalizations to arbitrary signatures are considered. It is proved that for a non-Euclidean signature the Riemann tensor squared of the solutions diverges on certain hypersurfaces in $R^{N_0}$.

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