Eternal acceleration from M-theory
arXiv:hep-th/0602102
Abstract
The dimensional reduction of -dimensional spacetimes arising in string/M-theory, to the conformal Einstein frame, may give rise to cosmologies with accelerated expansion. Through a complete analysis of the dynamics of doubly warped product spacetimes, in terms of scale invariant variables, it is demonstrated that for , eternally accelerating 4-dimensional Friedmann cosmologies arise from dimensional reduction on an internal space with negative Einstein geometry.
23 pages, 5 figures; references/comments added