A smooth exit from eternal inflation?

Hawking, S. (DAMTP, CMS, Wilberforce Road, CB3 0WA, Cambridge, U.K.) ; Hertog, Thomas (0000 0001 0668 7884, Institute for Theoretical Physics, University of Leuven, Celestijnenlaan 200D, 3001, Leuven, Belgium)

30 April 2018

Abstract: The usual theory of inflation breaks down in eternal inflation. We derive a dual description of eternal inflation in terms of a deformed Euclidean CFT located at the threshold of eternal inflation. The partition function gives the amplitude of different geometries of the threshold surface in the no-boundary state. Its local and global behavior in dual toy models shows that the amplitude is low for surfaces which are not nearly conformal to the round three-sphere and essentially zero for surfaces with negative curvature. Based on this we conjecture that the exit from eternal inflation does not produce an infinite fractal-like multiverse, but is finite and reasonably smooth.

Published in: JHEP 1804 (2018) 147
Published by: Springer/SISSA
DOI: 10.1007/JHEP04(2018)147
arXiv: 1707.07702
License: CC-BY-4.0

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