On plane wave solutions in Lorentz-violating extensions of gravity
arXiv:2104.01651 · doi:10.3390/galaxies9020032
Abstract
In this paper, we obtain dispersion relations corresponding to plane wave solutions in various Lorentz-breaking extensions of gravity with dimensions 3, 4, 5 and 6. We demonstrate that these dispersion relations display an usual Lorentz-invariant mode when the corresponding additive term involves higher derivatives.
14 pages, version accepted to Galaxies