G\"{o}del-type universes in bumblebee gravity
General Relativity and Quantum Cosmology
2020-05-20 v1
Abstract
The bumblebee field coupled with gravity is considered. This gravitational theory exhibits spontaneous breaking of Lorentz symmetry. The G\"{o}del-type universe is introduced and then the causality and its violation are studied. Causal and non-causal G\"{o}del-type solutions are obtained for different content of matter. In addition, when the coupling constant, which controls the interaction between the bumblebee field and the gravitational field, is zero the bumblebee potential may be associated with the value of the cosmological constant of the general relativity. Furthermore, the case with the non-zero coupling constant is also investigated.
Keywords
Cite
@article{arxiv.2003.13364,
title = {G\"{o}del-type universes in bumblebee gravity},
author = {W. D. R. Jesus and A. F. Santos},
journal= {arXiv preprint arXiv:2003.13364},
year = {2020}
}
Comments
13 pages, accepted for publication in IJMPA