2007/05/31 by Ken D. Olum, Delia Schwartz-Perlov · 1 citation
Physics and Astronomy · #hep-th
paper · pdf · doi:10.1088/1475-7516/2007/10/010
published as JCAP0710:010,2007 · 13 pages
arxiv created 2019/10/29 · arxiv updated 2019/10/30
The successful anthropic prediction of the cosmological constant depends crucially on the assumption of a flat prior distribution. However, previous calculations in simplified landscape models showed that the prior distribution is staggered, suggesting a conflict with anthropic predictions. Here we analytically calculate the full distribution, including the prior and anthropic selection effects, in a toy landscape model with a realistic number of vacua, N ∼ 10500. We show that it is possible for the fractal prior distribution we find to behave as an effectively flat distribution in a wide class of landscapes, depending on the regime of parameter space. Whether or not this possibility is realized depends on presently unknown details of the landscape.