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arXiv · 2507.13916

Freeze-in gravitational waves and dark matter in warm inflation

Quan Chen·Siyu Jiang·Dayun Qiu·Peilin Chen·Fa Peng Huang
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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.

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Quan Chen, Siyu Jiang, Dayun Qiu, Peilin Chen, Fa Peng Huang. 2025-07-18. Freeze-in gravitational waves and dark matter in warm inflation. https://doi.org/10.1088/1475-7516%2F2026%2F03%2F051

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