Return of the Boltzmann Brains

Details Return of the Boltzmann Brains Return of the Boltzmann Brains

2006-11-15

arxiv.org/abs/hep-th/0611158v1

Phys.Rev.D78:063536,2008

Physics

High Energy Physics

High Energy Physics - Theory

7 pages, LaTeX

Scientific paper

10.1103/PhysRevD.78.063536

Linde in hep-th/0611043 shows that some (though not all) versions of the global (volume-weighted) description avoid the "Boltzmann brain" problem raised in hep-th/0610079 if the universe does not have a decay time less than 20 Gyr. Here I give an apparently natural version of the volume-weighted description in which the problem persists, highlighting the ambiguity of taking the ratios of infinite volumes that appear to arise from eternal inflation.

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