Accelerating cosmologies from M / string theory compactifications
Apr, 2003Citations per year
Abstract: (Elsevier)
We point out that the solution of (4+ n )-dimensional gravity coupled to the dilaton and an n -form field strength can give rise to a flat 4-dimensional universe (with a scale factor) of the type proposed recently under time dependent compactifications. The compact internal spaces could be hyperbolic, flat or spherical and the solution is identical to the space-like two brane or S2-brane. As has been shown previously for SM2 solution with a fixed field strength we show that for n =7 (where the dilaton is vanishing and with a general field strength), 6 the corresponding SM2 and SD2 solutions can give accelerating cosmologies in Einstein frame for both hyperbolic and flat internal spaces, thereby meeting the challenge of obtaining such a solution from M/String theory compactifications.- gravitation
- dilaton
- field theory: tensor
- M-theory
- string model
- any-dimensional
- compactification
- astrophysics: acceleration
- numerical calculations
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