Chiral gravitational waves from domain walls in Nieh-Yan gravity
General Relativity and Quantum Cosmology
2025-12-17 v1 High Energy Physics - Phenomenology
High Energy Physics - Theory
Abstract
We study the scattering of gravitational waves by axion domain walls in teleparallel gravity with the Nieh-Yan term. Since a domain wall causes the parity violation, the transmitted gravitational waves also exhibit the parity violation. We calculate the degree of circular polarization of gravitational waves. It turns out that gravitational waves after going through the domain wall could be chiral. Remarkably, the degree of circular polarization does not depend on the tension of the domain wall.
Cite
@article{arxiv.2512.14063,
title = {Chiral gravitational waves from domain walls in Nieh-Yan gravity},
author = {Jiro Soda and Maki Takeuchi},
journal= {arXiv preprint arXiv:2512.14063},
year = {2025}
}
Comments
17 pages, 2 figures