Freeze-in gravitational waves and dark matter in warm inflation
Abstract
Recent study [1] has suggested that warm inflation may be realized with a minimal extension of the Standard Model by a single scalar inflaton field with an axion-like coupling to gluons. Motivated by this framework, we investigate the gravitational wave spectrum and graviton-portal dark matter production through the freeze-in process generated during warm inflation scenarios. We perform a comparative analysis for different dissipation terms, focusing on their distinct gravitational wave signatures in the high-frequency regime. Our findings reveal qualitative and quantitative differences in the spectral behavior, offering a preliminary pathway for exploring inflationary and dark matter models through high-frequency gravitational wave signals.
Cite
@article{arxiv.2507.13916,
title = {Freeze-in gravitational waves and dark matter in warm inflation},
author = {Quan Chen and Siyu Jiang and Dayun Qiu and Peilin Chen and Fa Peng Huang},
journal= {arXiv preprint arXiv:2507.13916},
year = {2026}
}
Comments
Published version in JCAP