Bose-Einstein condensate cosmology within the framework of QCD axion
Abstract
A bstract Bose-Einstein Condensation (BEC) cosmology is analyzed in the framework of a string-inspired axion model. The dispersion relation of the axionic mode includes both gravitational and self-interaction terms, the latter being small in magnitude but crucial for inducing instability of the condensate. The generation rate of BEC around redshift z ≈ 30 is primarily governed by gravity, consistent with a phenomenological value Γ ≈ 10 − 31 eV adopted in previous work and realizable for the QCD axion. The relation between this early BEC epoch and the later formation of supermassive black holes at z ≈ 5 is also discussed.
Fields of Study & Subjects
Dark Matter and Cosmic Phenomena
Cosmology and Gravitation Theories
Galaxies: Formation
Evolution
Phenomena
Publication details
- Journal / source
- Journal of High Energy Physics
- Volume
- 2026
- Issue
- 2
- Publication date
- 4 February 2026
- Language
- EN