276 citations · 2k across the 57 of their papers we have counts for
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Anthropic Explanation of the Dark Matter Abundance
Ben Freivogel
I use Bousso's causal diamond measure to make a statistical prediction for the dark matter abundance, assuming an axion with a large decay constant f_a >> 10^{12} GeV. Using a crud…
Properties of the scale factor measure
Raphael Bousso, Ben Freivogel, I-Sheng Yang
We show that in expanding regions, the scale factor measure can be reformulated as a local measure: Observations are weighted by integrating their physical density along a geodesic…
Future Foam
Raphael Bousso, Ben Freivogel, Yasuhiro Sekino +4
We study pocket universes which have zero cosmological constant and non-trivial boundary topology. These arise from bubble collisions in eternal inflation. Using a simplified dust…
Evidence for a bound on the lifetime of de Sitter space
Ben Freivogel, Matthew Lippert
Recent work has suggested a surprising new upper bound on the lifetime of de Sitter vacua in string theory. The bound is parametrically longer than the Hubble time but parametrical…