Gravitational wave birefringence in spatially curved teleparallel cosmology

verfasst von
Manuel Hohmann, Christian Pfeifer
Abstract

We study tensor perturbations around the most general cosmologically symmetric backgrounds in a class of teleparallel gravity theories known as New General Relativity. These theories comprise a one-parameter class, which is fully consistent with observations at the post-Newtonian level, and which contains the teleparallel equivalent of General Relativity as a special case. We find that for a particular class of cosmological background geometries these theories exhibit gravitational wave birefringence and dispersion, i.e., the dispersion relation for gravitational waves depends on their polarization and wave number. The strength of this effect is directly related to the spatial curvature of the cosmological background and the parameter describing the deviation of the theory from General Relativity. We discuss the possibility of observing this effect in gravitational wave experiments.

Externe Organisation(en)
University of Tartu
Zentrum für angewandte Raumfahrt­technologie und Mikro­gravitation (ZARM)
Typ
Artikel
Journal
Physics Letters B
Band
834
ISSN
0370-2693
Publikationsdatum
10.11.2022
Publikationsstatus
Veröffentlicht
Peer-reviewed
Ja
ASJC Scopus Sachgebiete
Kern- und Hochenergiephysik
Elektronische Version(en)
https://doi.org/10.1016/j.physletb.2022.137437 (Zugang: Offen)