Kierkla, MaciejLaverda, GiorgioLewicki, MarekMantziris, AndreasPiani, MatteoRubio Peña, JavierZych, Mateusz2024-03-132024-03-132023-11-131126-670810.1007/JHEP11(2023)077https://hdl.handle.net/20.500.14352/1022092023 Descuento SCOAPThe detection of a stochastic Gravitational Wave (GW) background sourced by a cosmological phase transition would allow us to see the early Universe from a completely new perspective, illuminating aspects of Beyond the Standard Model (BSM) physics and inflationary cosmology. In this study, we investigate whether the evolution of the scalar potential of a minimal SM extension after inflation can lead to a strong first-order phase transition. In particular, we focus on a BSM spectator scalar field that is non-minimally coupled to gravity and has a dynamical double-well potential. As inflation ends, the potential barrier diminishes due to the evolution of the curvature scalar. Therefore, a phase transition can proceed through the nucleation of true-vacuum bubbles that collide as they fill the Universe and produce GWs. We consider high and low scales of inflation, while also taking into account a kination period between inflation and the onset of radiation domination. With this prescription, we showcase a proof-of-concept study of a new triggering mechanism for BSM phase transitions in the early Universe, whose GW signatures could potentially be probed with future detectors.engAttribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/journal article1029-8479https://link.springer.com/article/10.1007/JHEP11(2023)077https://arxiv.org/abs/2309.08530open access524.8Phase Transitions in the Early UniverseCosmological modelsCosmology of Theories BSMAstrofísicaPartículas2101 Cosmología y Cosmogonía