Spacetime Dimensionality from de Sitter Entropy.
We argue that de Sitter universes with a small cosmological constant are entropically favored to have three spatial dimensions. The conclusion relies on the causal-patch description of de Sitter space, where fiducial observers experience local thermal equilibrium up to a stretched horizon, on the holographic principle, and on some assumptions about the nature of gravity and the constituents of Hawking/Unruh radiation.
Publisher URL: http://arxiv.org/abs/1106.4548
DOI: arXiv:1106.4548v3
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