Renormalizing open quantum field theories
High Energy Physics - Theory
2022-02-16 v3
Abstract
The functional renormalization group flow of a scalar field theory with quartic couplings and a sharp spatial momentum cutoff is presented in four-dimensional Minkowski space-time for the bare action by retaining the entanglement of the IR and the UV particle modes. It is argued that the open interaction channels have to be taken into account in quantum field theory defined by the help of a cutoff, and a non-perturbative UV-IR entanglement is found in closed or almost closed models.
Cite
@article{arxiv.2012.13811,
title = {Renormalizing open quantum field theories},
author = {S. Nagy and J. Polonyi},
journal= {arXiv preprint arXiv:2012.13811},
year = {2022}
}
Comments
32 pages, 9 figures, final version to appear in Universe