A no-go theorem for accelerating cosmologies from M-theory compactifications
Abstract
It is known that four-dimensional cosmologies exhibiting transient phases of acceleration can be obtained by compactifications of low-energy effective string or M-theory on time-varying manifolds. In the four-dimensional theory, the acceleration can be attributed to a quintessential scalar field with a positive effective potential. Recently, Townsend has conjectured that the potentials obtained by such compactifications cannot give rise to late-time accelerating universes which possess future event horizons. Such a `no-go' result would be desirable, since current string or M-theory seems unable to provide an adequate description of space-times with future event horizons. In this letter, we provide a proof of this conjecture for a class of warped compactifications with a single scalar modulus parametrising the volume of the compactification manifold.
Cite
@article{arxiv.hep-th/0412164,
title = {A no-go theorem for accelerating cosmologies from M-theory compactifications},
author = {Edward Teo},
journal= {arXiv preprint arXiv:hep-th/0412164},
year = {2010}
}
Comments
11 pages, LaTeX; minor changes and clarifications made