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- W2050552037 abstract "We consider the compactification of (d+n)-dimensional pure gravity and of superstring/M-theory on an n-dimensional internal space to a d-dimensional FLRW cosmology, with spatial curvature k=-1,0,+1, in Einstein conformal frame. The internal space is taken to be a product of Einstein spaces, each of which is allowed to have arbitrary curvature and a time-dependent volume. By investigating the effective d-dimensional scalar potential, which is a sum of exponentials, it is shown that such compactifications, in the k=0,+1 cases, do not lead to large amounts of accelerating expansion of the scale factor of the resulting FLRW universe, and, in particular, not to inflation. The case k=-1 admits solutions with eternal accelerating expansion for which the acceleration, however, tends to zero at late times." @default.
- W2050552037 created "2016-06-24" @default.
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- W2050552037 date "2004-03-10" @default.
- W2050552037 modified "2023-09-24" @default.
- W2050552037 title "Inflationary cosmologies from compactification?" @default.
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- W2050552037 doi "https://doi.org/10.1103/physrevd.69.066002" @default.
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