A bimetric cosmological model based on Andreï Sakharov’s twin universe approach Jean-Pierre Petit, Florent Margnat and Hicham Zejli Eur. Phys. J. C, 84 11 (2024) 1226 Published online: 26 November 2024 DOI: 10.1140/epjc/s10052-024-13569-w