Damped perturbations in the no-boundary state
General Relativity and Quantum Cosmology
2018-09-11 v2 High Energy Physics - Theory
Abstract
We evaluate the no-boundary path integral exactly in a Bianchi IX minisuperspace with two scale factors. In this model the no-boundary proposal can be implemented by requiring one scale factor to be zero initially together with a judiciously chosen regularity condition on the momentum conjugate to the second scale factor. Taking into account the non-linear backreaction of the perturbations we recover the predictions of the original semiclassical no-boundary proposal. In particular we find that large perturbations are strongly damped, consistent with vacuum state wave functions.
Cite
@article{arxiv.1804.01102,
title = {Damped perturbations in the no-boundary state},
author = {Juan Diaz Dorronsoro and Jonathan J. Halliwell and James B. Hartle and Thomas Hertog and Oliver Janssen and Yannick Vreys},
journal= {arXiv preprint arXiv:1804.01102},
year = {2018}
}
Comments
Dedicated to the memory of Stephen Hawking