Speaker
Mr.
Pavel Korolyov
(PFUR,)
Description
We consider 6D manifolds with the structure M0 x M1 x M2, where M0 is 2D Lorentzian space-time while each of M1 and M2 can be a 2-sphere or a 2-torus.Among such geometries, we find examples of regular solutions of 6D general relativity with a scalar field as a source of gravity, which depend on a single coordinate x ranging over the whole real axis, with different asymptotic behavior at plus and minus infinity. On one end, it is a 4D de Sitter universe times small extra dimensions, while on the other end there is some kind of a static space-time. We thus obtain configurations called black universes, looking as a black hole on the static end and as an expanding universe on the other, and the cosmological expansion begins from a horizon.
