A class of ghost-free theories in symmetric teleparallel geometry
General Relativity and Quantum Cosmology
2025-01-15 v2 Cosmology and Nongalactic Astrophysics
Abstract
Theories formulated in the arena of teleparallel geometries are generically plagued by ghost-like instabilities or other pathologies that are ultimately caused by the breaking of some symmetries. In this work, we construct a class of ghost-free theories based on a symmetry under Transverse Diffeomorphisms that is naturally realised in symmetric teleparallelism. We explicitly show their equivalence to a family of theories with an extra scalar field plus a global degree of freedom and how Horndeski theories and healthy couplings to matter fields can be readily accommodated.
Keywords
Cite
@article{arxiv.2406.19355,
title = {A class of ghost-free theories in symmetric teleparallel geometry},
author = {Antonio G. Bello-Morales and Jose Beltrán Jiménez and Alejandro Jiménez Cano and Antonio L. Maroto and Tomi S. Koivisto},
journal= {arXiv preprint arXiv:2406.19355},
year = {2025}
}
Comments
11 pages, no figures. V2: 13 pages, added clarifications and references, matches published version