The Entropy of the Microwave Background and the Acceleration of the Universe
arXiv:hep-th/0307031 · doi:10.1088/1126-6708/2003/09/024
Abstract
If the present acceleration of the universe is due to a cosmological constant, λ, then the entropy of the microwave background is bounded. It cannot exceed λ^{-3/4} \sim 10^{91}, which is much less than the entropy of empty de Sitter space λ^{-1} \sim 10^{122}. This is due to the limited efficiency of storing entropy by local field theoretical degrees of freedom. The observed entropy of the microwave background is of O(10^{85}).
12 pages, 1 eps figure, Latex, references added