Accelerated expansion of the universe in a non-trivial extra-dimensional topology |
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| Authors: | Ahmad Rami El-Nabulsi |
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| Institution: | 1.Department of Nuclear and Energy Engineering,Cheju National University,Jeju,South Korea |
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| Abstract: | The recent observational available data for an accelerated expansion state of the present universe, obtained from distant
SNeIa gave strong support to the search of alternative cosmologies. Recently, there have been a number of different attempts
to modify Einstein’s gravity to yield accelerated expansion at late times. Unfortunately, many of the theoretical models discussed
in the literature are plagued with theoretical problems, in particular the singularity problem at the origin of time. In the
present work we have analyzed a multidimensional spacetime Friedmann–Robertson–Walker (FRW) model with a decaying cosmological
constant and a varying gravitational constant. Many interesting consequences are revealed, in particular the behavior of the
scale factor and the shape of the universe in terms of the number of extra dimensions. |
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