We study the potential induced by imaginary self-dual 3-forms in compactifications of string theory and the cosmological evolution associated with it. The potential contains exponentials of the volume moduli of the compactification, and we demonstrate that the exponential form of the potential leads to a power law for the scale factor of the universe. This power law does not support accelerated expansion. We explain this result in terms of supersymmetry and comment on corrections to the potential that could lead to inflation or quintessence.
© 2003 The American Physical Society
16pg, RevTeX4, v2 fixed small misprint in eqs 16,17, v3 added 1 reference, to be published in Phys Rev D