2006/02/28 by Lars Andersson, J. Mark Heinzle · 1 citation
Physics and Astronomy · #hep-th #gr-qc
published as Adv.Theor.Math.Phys.11:371-398,2007 · 23 pages, 5 figures; references/comments added
arxiv created 2006/03/22 · arxiv updated 2009/12/01
The dimensional reduction of D-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 D ≥ 10, eternally accelerating 4-dimensional κ= -1 Friedmann cosmologies arise from dimensional reduction on an internal space with negative Einstein geometry.