Inhomogeneous M-Theory Cosmologies

Details Inhomogeneous M-Theory Cosmologies Inhomogeneous M-Theory Cosmologies

2002-09-03

arxiv.org/abs/hep-th/0209022v1

J.Math.Phys. 43 (2002) 4849-4860

Physics

High Energy Physics

High Energy Physics - Theory

18 pages, 0 figures, REVTEX, AMSfonts; To appear in Jour. Math. Phys

Scientific paper

10.1063/1.1504886

We study a class of inhomogeneous and anisotropic $G_2$ string cosmological models. In the case of separable $G_2$ models we show that the governing equations reduce to a system of ordinary differential equations. We focus on a class of separable $G_2$ M-theory cosmological models, and study their qualitative behaviour (a class of models with time-reversed dynamics is also possible). We find that generically these inhomogeneous M-theory cosmologies evolve from a spatially inhomogeneous and negatively curved model with a non-trivial form field towards spatially flat and spatially homogeneous dilaton-moduli-vacuum solutions with trivial form--fields. The late time behaviour is the same as that of spatially homogeneous models previously studied. However, the inhomogeneities are not dynamically insignificant at early times in these models.

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