Gravitational waves from warm inflation in the weak dissipative regime
Year: 2026
Type: article
Abstract: Previous work on the gravitational-wave background generated in a two-scalar-field cosmological model, in which warm inflation and the dark sector are unified within a single framework, has shown that the resulting spectrum could be potentially detectable by planned next-generation gravitational-wave observatories. In this work, we extend this analysis to the weak dissipation regime of warm inflation, highlighting how the features of the inflationary scenario play a crucial role in the production of gravitational waves. The full gravitational-wave energy spectrum is calculated using the formalism of continuous Bogoliubov coefficients. By comparing our results with those obtained in the strong dissipation regime and with the sensitivity curves of future detectors, we find that the weak dissipation regime improves the prospects for observational detection.
Source: Physics of the Dark Universe
Authors: Orlando Luongo, Tommaso Mengoni, Paulo M. Sá
Institutions: Università di Camerino, Istituto Nazionale di Fisica Nucleare, Al-Farabi Kazakh National University, Brera Astronomical Observatory, University at Albany, State University of New York, Istituto Nazionale di Fisica Nucleare, Sezione di Perugia, National Institute for Astrophysics, Centro de Investigação e Desenvolvimento em Matemática e Aplicações, University of Aveiro, University of Algarve
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,660
OpenAlex ID: W7153743246