Gravitational Waves in Bianchi Type-I Universes I: The Classical Theory
General Relativity and Quantum Cosmology
2009-10-28 v1 Astrophysics
High Energy Physics - Theory
Abstract
The propagation of classical gravitational waves in Bianchi Type-I universes is studied. We find that gravitational waves in Bianchi Type-I universes are not equivalent to two minimally coupled massless scalar fields as it is for the Robertson-Walker universe. Due to its tensorial nature, the gravitational wave is much more sensitive to the anisotropy of the spacetime than the scalar field is and it gains an effective mass term. Moreover, we find a coupling between the two polarization states of the gravitational wave which is also not present in the Robertson-Walker universe.
Keywords
Cite
@article{arxiv.gr-qc/9504046,
title = {Gravitational Waves in Bianchi Type-I Universes I: The Classical Theory},
author = {H. T. Cho and A. D. Speliotopoulos},
journal= {arXiv preprint arXiv:gr-qc/9504046},
year = {2009}
}
Comments
34 papers, written in ReVTeX, submitted to Physical Review D