Accelerating Cosmologies from Compactification
arXiv:hep-th/0303097 · doi:10.1103/PhysRevLett.91.061302
Abstract
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.
4 pages, 2 figures, REVTeX4, clarifications and references added