Towards the physical vacuum of cosmic inflation
High Energy Physics - Theory
2016-08-03 v1
Abstract
There have been long debates about the initial condition of inflationary perturbations. In this work we explicitly show the decay of excited states during inflation via interactions. For this purpose, we note that the folded shape non-Gaussianity can be interpreted as the decay of the non-Bunch-Davies initial condition. The one loop diagrams with non-Bunch-Davies propagators are calculated to uncover the decay of such excited states. The observed smallness of non-Gaussianity keeps the window open for probing inflationary initial conditions and trans-Planckian physics.
Keywords
Cite
@article{arxiv.1507.05193,
title = {Towards the physical vacuum of cosmic inflation},
author = {Hongliang Jiang and Yi Wang},
journal= {arXiv preprint arXiv:1507.05193},
year = {2016}
}