Spinodal Gravitational Waves
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arXiv
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| Format: | Preprint |
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2021
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| author | Bea, Yago Casalderrey-Solana, Jorge Giannakopoulos, Thanasis Jansen, Aron Krippendorf, Sven Mateos, David Sanchez-Garitaonandia, Mikel Zilhão, Miguel |
| author_facet | Bea, Yago Casalderrey-Solana, Jorge Giannakopoulos, Thanasis Jansen, Aron Krippendorf, Sven Mateos, David Sanchez-Garitaonandia, Mikel Zilhão, Miguel |
| contents | We uncover a new gravitational-wave production mechanism in cosmological, first-order, thermal phase transitions. These are usually assumed to proceed via the nucleation of bubbles of the stable phase inside the metastable phase. However, if the nucleation rate is sufficiently suppressed, then the Universe may supercool all the way down the metastable branch and enter the spinodal region. In this case the transition proceeds via the exponential growth of unstable modes and the subsequent formation, merging and relaxation of phase domains. We use holography to follow the real-time evolution of this process in a strongly coupled, four-dimensional gauge theory. The resulting gravitational wave spectrum differs qualitatively from that in transitions mediated by bubble nucleation. We discuss the possibility that the spinodal dynamics may be preceded by a period of thermal inflation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2112_15478 |
| institution | arXiv |
| publishDate | 2021 |
| record_format | arxiv |
| spellingShingle | Spinodal Gravitational Waves Bea, Yago Casalderrey-Solana, Jorge Giannakopoulos, Thanasis Jansen, Aron Krippendorf, Sven Mateos, David Sanchez-Garitaonandia, Mikel Zilhão, Miguel High Energy Physics - Theory General Relativity and Quantum Cosmology High Energy Physics - Phenomenology We uncover a new gravitational-wave production mechanism in cosmological, first-order, thermal phase transitions. These are usually assumed to proceed via the nucleation of bubbles of the stable phase inside the metastable phase. However, if the nucleation rate is sufficiently suppressed, then the Universe may supercool all the way down the metastable branch and enter the spinodal region. In this case the transition proceeds via the exponential growth of unstable modes and the subsequent formation, merging and relaxation of phase domains. We use holography to follow the real-time evolution of this process in a strongly coupled, four-dimensional gauge theory. The resulting gravitational wave spectrum differs qualitatively from that in transitions mediated by bubble nucleation. We discuss the possibility that the spinodal dynamics may be preceded by a period of thermal inflation. |
| title | Spinodal Gravitational Waves |
| topic | High Energy Physics - Theory General Relativity and Quantum Cosmology High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2112.15478 |