Accelerating Cosmologies from Compactification
High Energy Physics - Theory
2008-11-26 v3 Astrophysics
High Energy Physics - Phenomenology
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.
Cite
@article{arxiv.hep-th/0303097,
title = {Accelerating Cosmologies from Compactification},
author = {Paul K. Townsend and Mattias N. R. Wohlfarth},
journal= {arXiv preprint arXiv:hep-th/0303097},
year = {2008}
}
Comments
4 pages, 2 figures, REVTeX4, clarifications and references added