Possible consistent model of parity violations in the symmetric teleparallel gravity
Abstract
Many parity violating gravity models suffer from the ghost instability problem. In this paper, we consider a symmetric teleparallel gravity model that extends the general relativity equivalent model by several parity violating interactions between the gravitational field and a scalar field. These interactions exclude higher derivatives and are quadratic in the nonmetricity tensor. Through investigations on the linear cosmological perturbations, our results show that, in general, this model suffers from the difficulty caused by the existence of ghost mode in the vector perturbations. However, in cases where a special condition is imposed on the coefficients of these parity violating interactions, this model can be ghost free.
Keywords
Cite
@article{arxiv.2203.06912,
title = {Possible consistent model of parity violations in the symmetric teleparallel gravity},
author = {Mingzhe Li and Yeheng Tong and Dehao Zhao},
journal= {arXiv preprint arXiv:2203.06912},
year = {2022}
}
Comments
arXiv admin note: text overlap with arXiv:2201.02357