Local Observation in Eternal inflation

Details Local Observation in Eternal inflation Local Observation in Eternal inflation

2010-09-13

arxiv.org/abs/1009.2525v2

Phys.Rev.Lett.106:141302,2011

Physics

High Energy Physics

High Energy Physics - Theory

4 pages; v2: published version

Scientific paper

10.1103/PhysRevLett.106.141302

We consider landscape models that admit several regions where the conditions for eternal inflation hold. It is shown that one can use the no-boundary wave function to calculate small departures from homogeneity within our past light cone despite the possibility of much larger fluctuations on super horizon scales. The dominant contribution comes from the history exiting eternal inflation at the lowest value of the potential. In a class of landscape models this predicts a tensor to scalar ratio of about 10%. In this way the no-boundary wave function defines a measure for the prediction of local cosmological observations.

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