Local Observation in Eternal inflation

Abstract

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.

4 pages; v2: published version

References in corpus (7)

• The No-Boundary Measure of the Universe
• Populating the Landscape: A Top Down Approach
• The Phase Transition to Eternal Inflation
• The No-Boundary Measure in the Regime of Eternal Inflation
• Science in a Very Large Universe
• Space for Both No-Boundary and Tunneling Quantum States of the Universe
• Replication Regulates Volume Weighting in Quantum Cosmology

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