Superrenormalizable quantum gravity with complex ghosts
High Energy Physics - Theory
2016-03-23 v2 General Relativity and Quantum Cosmology
Abstract
We suggest and briefly review a new sort of superrenormalizable models of higher derivative quantum gravity. The higher derivative terms in the action can be introduced in such a way that all the unphysical massive states have complex poles. According to the literature on Lee-Wick quantization, in this case the theory can be formulated as unitary, since all massive ghosts-like degrees of freedom are unstable.
Keywords
Cite
@article{arxiv.1512.07600,
title = {Superrenormalizable quantum gravity with complex ghosts},
author = {Leonardo Modesto and Ilya L. Shapiro},
journal= {arXiv preprint arXiv:1512.07600},
year = {2016}
}
Comments
LaTeX, 15 pages, no figures. Modified version with small misprints corrected and Acknowledgments section inserted. To be published in Physics Letters B