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Physical Review Letters 106 (2011) 141302
Local Observation in Eternal Inflation
J. Hartle, S.W. Hawking1, T. Hertog2, 3

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.
1 :  DAMTP/CMS - Department of Applied Mathematics and Theoretical Physics / Centre for Mathematical Sciences
2 :  APC - UMR 7164 - AstroParticule et Cosmologie
3 :  International Solvay Institutes
Physique/Physique des Hautes Energies - Théorie

Physique/Astrophysique/Cosmologie et astrophysique extra-galactique

Planète et Univers/Astrophysique/Cosmologie et astrophysique extra-galactique

Physique/Relativité Générale et Cosmologie Quantique
Quantum cosmology – Quantum gravity – Origin and formation of the Universe – Particle-theory and field-theory models of the early Universe
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