Cosmological gravitational waves from isocurvature fluctuations

authored by: Guillem Domènech
Abstract: Gravitational waves induced by large primordial curvature fluctuations may result in a sizable stochastic gravitational wave background. Interestingly, curvature fluctuations are gradually generated by initial isocurvature fluctuations, which in turn induce gravitational waves. Initial isocurvature fluctuations commonly appear in multi-field models of inflation as well as in the formation of scattered compact objects in the very early universe, such as primordial black holes and solitons like oscillons and cosmic strings. Here, we provide a review on isocurvature induced gravitational waves and its applications to dark matter and the primordial black hole dominated early universe.
Organisation(s): Institute of Theoretical Physics
External Organisation(s): Max Planck Institute for Gravitational Physics (Albert Einstein Institute)
Type: Review article
Journal: AAPPS Bulletin
Volume: 34
No. of pages: 22
ISSN: 0218-2203
Publication date: 06.01.2024
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: General Physics and Astronomy
Electronic version(s): https://doi.org/10.48550/arXiv.2311.02065 (Access: Open)
https://doi.org/10.1007/s43673-023-00109-z (Access: Open)