Properties of the scale factor measure

Simple item page
dc.creatorBousso, Raphael
dc.creatorFreivogel, Ben
dc.creatorYang, I-Sheng
dc.date2008-08-27
dc.date2009-01-14
dc.date.accessioned2026-07-07T12:55:10Z
dc.date.available2026-07-07T12:55:10Z
dc.descriptionWe 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 that starts in the longest-lived metastable vacuum. This explains why some of its properties are similar to those of the causal diamond measure. In particular, both measures are free of Boltzmann brains, subject to nearly the same conditions on vacuum stability. However, the scale factor measure assigns a much smaller probability to the observed value of the cosmological constant. The probability decreases further, like the inverse sixth power of the primordial density contrast, if the latter is allowed to vary.
dc.descriptionv2, minor editing, PRD format, 18 pages, 2 figures
dc.identifierhttps://arxiv.org/abs/0808.3770
dc.identifierhttp://arxiv.org/abs/0808.3770
dc.identifierPhys.Rev.D79:063513,2009
dc.identifierdoi:10.1103/PhysRevD.79.063513
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/224173
dc.subjectHigh Energy Physics - Theory
dc.titleProperties of the scale factor measure
dc.typetext

Files

Collections

arXiv