We Probably Live On An Inflating Brane-World
Abstract
Brane-world models where observers are trapped within the thickness of a 3-brane offer novel perspectives on gravitation and cosmology. In this essay, I would argue that the problem of a late epoch acceleration of the universe is well explained in the framework of a 4-dimensional de Sitter universe embedded in a 5-dimensional de Sitter spacetime. While a 5D anti de Sitter space background is important for studying conformal field theories -- for its role in the AdS/CFT correspondence -- the existence of a 5-dimensional de Sitter space is crucial for finding an effective 4D Newton constant that remains finite and a normalizable zero-mode graviton wave function.
Cite
@article{arxiv.1106.3721,
title = {We Probably Live On An Inflating Brane-World},
author = {Ishwaree P. Neupane},
journal= {arXiv preprint arXiv:1106.3721},
year = {2012}
}
Comments
8 pages, latex (Essay received Honourable mention in Gravity Research Foundation essay competition 2011)