2003/03/31 by Paul K. Townsend, Mattias N. R. Wohlfarth · 1 citation
Physics and Astronomy · #hep-th #astro-ph #hep-ph
paper · pdf · doi:10.1103/physrevlett.91.061302
published as Phys.Rev.Lett.91:061302,2003 · 4 pages, 2 figures, REVTeX4, clarifications and references added
arxiv created 2003/04/24 · arxiv updated 2009/11/30
A solution of the (4+n)-dimensional vacuum Einstein equations is found for which spacetime is compactified on a compact hyperbolic manifold of time-varying volume to a flat four-dimensional FLRW cosmology undergoing accelerated expansion in Einstein conformal frame. This shows that the `no-go' theorem forbidding acceleration in `standard' (time-independent) compactifications of string/M-theory does not apply to `cosmological' (time-dependent) hyperbolic compactifications.