Dynamical Compactification from de Sitter Space

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Dynamical Compactification from de Sitter Space

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Title: Dynamical Compactification from de Sitter Space
Author: Randall, Lisa; Johnson, Matthew C.; Carroll, Sean M.

Note: Order does not necessarily reflect citation order of authors.

Citation: Carroll, Sean M., Matthew C. Johnson, and Lisa Randall. 2009. Dynamical compactification from de Sitter space. Journal of High Energy Physics 11: 094.
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Abstract: We show that \(D\)-dimensional de Sitter space is unstable to the nucleation of non-singular geometries containing spacetime regions with different numbers of macroscopic dimensions, leading to a dynamical mechanism of compactification. These and other solutions to Einstein gravity with flux and a cosmological constant are constructed by performing a dimensional reduction under the assumption of \(q\)-dimensional spherical symmetry in the full \(D\)-dimensional geometry. In addition to the familiar black holes, black branes, and compactification solutions we identify a number of new geometries, some of which are completely non-singular. The dynamical compactification mechanism populates lower-dimensional vacua very differently from false vacuum eternal inflation, which occurs entirely within the context of four-dimensions. We outline the phenomenology of the nucleation rates, finding that the dimensionality of the vacuum plays a key role and that among vacua of the same dimensionality, the rate is highest for smaller values of the cosmological constant. We consider the cosmological constant problem and propose a novel model of slow-roll inflation that is triggered by the compactification process.
Published Version: doi:10.1088/1126-6708/2009/11/094
Other Sources: http://arxiv.org/abs/0904.3115
Terms of Use: This article is made available under the terms and conditions applicable to Open Access Policy Articles, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#OAP
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:8052090

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