Inflation from String/M-Theory Compactification?

Abstract

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(-2cϕ), we find eternally accelerating cosmologies when the 4d space-time is flat and c\geq 1, or hyperbolic and 1<c<\sqrt{2}.

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

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• Accelerating Cosmologies from Compactification
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Cited by in corpus (4)

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• Cosmic Acceleration from M Theory on Twisted Spaces
• Decoupling of the general scalar field mode and the solution space for Bianchi type I and V cosmologies coupled to perfect fluid sources
• Integrable Cosmological Models From Higher Dimensional Einstein Equations