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The Entropy of the Microwave Background and the Acceleration of the Universe

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}).

preprint2003arXivOpen access
W. FischlerA. LoewyS. Paban
astro-phhep-phgr-qchep-th
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W. FischlerA. LoewyS. Paban

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