Local observation in eternal inflation

Local observation in eternal inflation

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 h...

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Veröffentlicht in:Physical review letters 2011-04, Vol.106 (14), p.141302-141302, Article 141302
Hauptverfasser: Hartle, James, Hawking, S W, Hertog, Thomas
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Astrophysics
Cosmology and Extra-Galactic Astrophysics
General Relativity and Quantum Cosmology
High Energy Physics - Theory
Physics
Sciences of the Universe
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container_title Physical review letters
container_volume 106
creator Hartle, James
Hawking, S W
Hertog, Thomas
description 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.
doi_str_mv 10.1103/PhysRevLett.106.141302
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subjects Astrophysics
Cosmology and Extra-Galactic Astrophysics
General Relativity and Quantum Cosmology
High Energy Physics - Theory
Physics
Sciences of the Universe
title Local observation in eternal inflation
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