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- W1994085712 abstract "We present cosmological solutions for (1+3+n)-dimensional steady state universe in dilaton gravity with an arbitrary dilaton coupling constant w and exponential dilaton self-interaction potentials in the string frame. We focus particularly on the class in which the 3-space expands with a time varying deceleration parameter. We discuss the number of the internal dimensions and the value of the dilaton coupling constant to determine the cases that are consistent with the observed universe and the primordial nucleosynthesis. The 3-space starts with a decelerated expansion rate and evolves into accelerated expansion phase subject to the values of w and n, but ends with a Big Rip in all cases. We discuss the cosmological evolution in further detail for the cases w=1 and w=1/2 that permit exact solutions. We also comment on how the universe would be conceived by an observer in four dimensions who is unaware of the internal dimensions and thinks that the conventional general relativity is valid at cosmological scales." @default.
- W1994085712 created "2016-06-24" @default.
- W1994085712 creator A5027911245 @default.
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- W1994085712 date "2013-02-28" @default.
- W1994085712 modified "2023-10-18" @default.
- W1994085712 title "Late time acceleration of the 3-space in a higher dimensional steady state universe in dilaton gravity" @default.
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- W1994085712 doi "https://doi.org/10.1088/1475-7516/2013/02/050" @default.
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