Inflation from String/M-Theory Compactification?

Details Inflation from String/M-Theory Compactification? Inflation from String/M-Theory Compactification?

2003-09-15

arxiv.org/abs/hep-th/0309139v2

Nucl. Phys. B Proc. Suppl. 129: 800, 2004

Physics

High Energy Physics

High Energy Physics - Theory

3 pp. espcrc2.sty. Minor typos corrected and Ref. added. To appear in proceedings of Lattice 2003 (Gravity), Tsukuba, Japan, J

Scientific paper

10.1016/S0920-5632(03)02717-8

We present some exact scalar potentials for the dimensionally reduced theory and examine the possibility of obtaining accelerating 4d cosmology from String/M-theory, more generally, hyperbolic and flux compactification. In the hyperbolic case, even in the zero-flux limit, the scalar potential is positive for the 4d effective theory as required to get an accelerating universe, and thereby evading the ``no-go theorem'' given for static internal space. When we turn on the gauge fields as source terms at the cosmological background with potential V\propto exp(-2c\phi), we find eternally accelerating cosmologies when the 4d space-time is flat and c\geq 1, or hyperbolic and 1

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