Probing Bose-enhanced Inflaton Decay with Gravitational Waves
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2026
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| _version_ | 1866911674765672448 |
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| author | Bernal, Nicolás Wu, Quan-feng Xu, Xun-Jie Xu, Yong |
| author_facet | Bernal, Nicolás Wu, Quan-feng Xu, Xun-Jie Xu, Yong |
| contents | We investigate cosmic reheating dynamics in the presence of a transient condensate formed by bosonic decay products of the inflaton. We show that the emergence of such a condensate and the corresponding Bose enhancement can dramatically increase the efficiency of inflaton decay, giving rise to qualitatively new reheating dynamics beyond the standard perturbative picture. As a consequence, graviton production from inflaton decay processes is significantly amplified by Bose enhancement effects, leading to a stochastic gravitational-wave background with a potentially observable amplitude, even in the low-frequency regime. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_20939 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Probing Bose-enhanced Inflaton Decay with Gravitational Waves Bernal, Nicolás Wu, Quan-feng Xu, Xun-Jie Xu, Yong High Energy Physics - Phenomenology We investigate cosmic reheating dynamics in the presence of a transient condensate formed by bosonic decay products of the inflaton. We show that the emergence of such a condensate and the corresponding Bose enhancement can dramatically increase the efficiency of inflaton decay, giving rise to qualitatively new reheating dynamics beyond the standard perturbative picture. As a consequence, graviton production from inflaton decay processes is significantly amplified by Bose enhancement effects, leading to a stochastic gravitational-wave background with a potentially observable amplitude, even in the low-frequency regime. |
| title | Probing Bose-enhanced Inflaton Decay with Gravitational Waves |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2601.20939 |