The problem of stability of internal spaces in multidimensional cosmology

We investigate effective 4-dimensional theories which were obtained under dimensional reduction of multidimensional cosmological models. We show that for warped product spacetimes the conformal (geometrical moduli) excitations of the internal spaces should be observable as massive scalar fields in the external (our) spacetime. These scalar fields (gravitational excitons) describe weakly interacting particles and can be considered as dark matter components. An essential role is played by the effective potential. On the one hand, its minima fix possible stabilization scales of the internal spaces, on the other hand, they provide possible values for the effective cosmological constant.

 

Date: 
28/06/2001 - 14:00
Speaker: 
Prof. Alexander Zhuk
Filiation: 
IMAFF (CSIC), Madrid


Seminars