Details
| Original language | English |
|---|---|
| Article number | 137437 |
| Journal | Physics Letters B |
| Volume | 834 |
| Early online date | 8 Sept 2022 |
| Publication status | Published - 10 Nov 2022 |
| Externally published | Yes |
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.
Keywords
- Gravitational waves, Teleparallel gravity, Tensor perturbations, Birefringence
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Nuclear and High Energy Physics
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In: Physics Letters B, Vol. 834, 137437, 10.11.2022.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Gravitational wave birefringence in spatially curved teleparallel cosmology
AU - Hohmann, Manuel
AU - Pfeifer, Christian
N1 - Funding information: M.H. acknowledges support by the Estonian Ministry for Education and Science through the Personal Research Funding Grants PRG356 , as well as the European Regional Development Fund through the Center of Excellence TK133 “The Dark Side of the Universe”. C.P. was funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) - Project Number 420243324 and acknowledges support from the DFG funded cluster of excellence Quantum Frontiers under Germany's Excellence Strategy - EXC-2123 QuantumFrontiers - 390837967 . M.H. and C.P. acknowledge networking support by the COST Action CA18108 .
PY - 2022/11/10
Y1 - 2022/11/10
N2 - 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.
AB - 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.
KW - Gravitational waves
KW - Teleparallel gravity
KW - Tensor perturbations
KW - Birefringence
UR - http://www.scopus.com/inward/record.url?scp=85138107842&partnerID=8YFLogxK
U2 - 10.1016/j.physletb.2022.137437
DO - 10.1016/j.physletb.2022.137437
M3 - Article
VL - 834
JO - Physics Letters B
JF - Physics Letters B
SN - 0370-2693
M1 - 137437
ER -