Unitarity issues in higher derivative field theories
High Energy Physics - Theory
2018-09-03 v1 General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
Mathematical Physics
math.MP
Abstract
We analyze the unitarity properties of higher derivative quantum field theories which are free of ghosts and ultraviolet singularities. We point out that in spite of the absence of ghosts most of these theories are not unitary. This result confirms the difficulties of finding a consistent quantum field theory of quantum gravity.
Keywords
Cite
@article{arxiv.1802.01036,
title = {Unitarity issues in higher derivative field theories},
author = {Manuel Asorey and Lesław Rachwał and Ilya Shapiro},
journal= {arXiv preprint arXiv:1802.01036},
year = {2018}
}
Comments
8 pages, 1 figure