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SPACETIME DIMENSIONALITY FROM DE SITTER ENTROPY // Tomsk State Pedagogical University Bulletin. 2014. Issue 12 (153). P. 186-191

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.

Keywords: de Sitter space, entropy, spacetime dimensions