2009/12/18 by Andrea De Simone, Michael P. Salem · 1 citation
Computer Science · Physics and Astronomy · #Cellular Automata and Applications #Cosmology and Gravitation Theories #Error Correcting Code Techniques #astro-ph.CO #hep-th
paper · pdf · doi:10.1103/physrevd.81.083527
published as Phys.Rev.D81:083527,2010 · 14 pages, 7 figures
arxiv created 2009/12/18 · openalex publication_date 2010/04/22 · arxiv updated 2010/05/12 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Our Universe may be contained in one among a diverging number of bubbles that nucleate within an eternally inflating multiverse. A promising measure to regulate the diverging spacetime volume of such a multiverse is the scale-factor cutoff, one feature of which is bubbles are not rewarded for having a longer duration of slow-roll inflation. Thus, depending on the landscape distribution of the number of e-folds of inflation among bubbles like ours, we might hope to measure spatial curvature. We study a recently proposed cartoon model of inflation in the landscape and find a reasonable chance (about 10%) that the curvature in our Universe is well above the value expected from cosmic variance. Anthropic selection does not strongly select for curvature as small as is observed (relative somewhat larger values), meaning the observational bound on curvature can be used to rule out landscape models that typically give too little inflation.