Warped compactification to de Sitter space
arXiv:1011.5007 · doi:10.1016/j.nuclphysb.2011.02.006
Abstract
We explore in detail the prospects of obtaining a four-dimensional de Sitter universe in classical supergravity models with warped and time-independent extra dimensions, presenting explicit cosmological solutions of the -dimensional Einstein equations with and without a bulk cosmological constant term. For the first time in the literature we show that there may exist a large class of warped supergravity models with a noncompact extra dimension which lead to a finite 4D Newton constant as well as a massless 4D graviton localised on an inflating four-dimensional FLRW universe. This result helps establish that the `no-go' theorem forbidding acceleration in `standard' compactification of string/M-theory on physically compact spaces should not apply to a general class of warped supergravity models that allows at least one noncompact direction. We present solutions for which the size of the radial dimension takes a constant value in the large volume limit, providing an explicit example of spontaneous compactification.
19 pages, 2 figures; final (journal) version
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Cited by in corpus (10)
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- Gravity Localization and Effective Newtonian Potential for Bent Thick Branes
- Warped de Sitter compactifications
- Einstein Branes
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