A smooth exit from eternal inflation?
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 noboundary 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 threesphere and essentially zero for surfaces with negative curvature. Based on this we conjecture that the exit from eternal inflation does not produce an infinite fractallike multiverse, but is finite and reasonably smooth.
 Publication:

Journal of High Energy Physics
 Pub Date:
 April 2018
 DOI:
 10.1007/JHEP04(2018)147
 arXiv:
 arXiv:1707.07702
 Bibcode:
 2018JHEP...04..147H
 Keywords:

 AdSCFT Correspondence;
 Gaugegravity correspondence;
 Models of Quantum Gravity;
 Spacetime Singularities;
 High Energy Physics  Theory;
 Astrophysics  Cosmology and Nongalactic Astrophysics;
 General Relativity and Quantum Cosmology
 EPrint:
 15 pages