Non-locality in Quantum Field Theory due to General Relativity
High Energy Physics - Theory
2016-01-27 v2 Cosmology and Nongalactic Astrophysics
General Relativity and Quantum Cosmology
Abstract
We show that General Relativity coupled to a quantum field theory generically leads to non-local effects in the matter sector. These non-local effects can be described by non-local higher dimensional operators which remarkably have an approximate shift symmetry. When applied to inflationary models, our results imply that small non-Gaussianities are a generic feature of models based on General Relativity coupled to matter fields. However, these effects are too small to be observable in the Cosmic Microwave Background.
Cite
@article{arxiv.1505.04517,
title = {Non-locality in Quantum Field Theory due to General Relativity},
author = {Xavier Calmet and Djuna Croon and Christopher Fritz},
journal= {arXiv preprint arXiv:1505.04517},
year = {2016}
}