Linear matter density perturbations in the ΛsCDM model: Examining growth dynamics and addressing the S 8 tension
Sign Up to like & getrecommendations! Published in 2025 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2025/08/089
Abstract: We investigate linear matter density perturbations in the ΛsCDM scenario, in which the Λ is replaced by one that undergoes a late-time (z ∼ 2) mirror AdS-dS transition, resulting in distinct growth dynamics that shape… read more here.
Keywords: matter density; linear matter; transition; density ... See more keywords
Evolution of linear matter perturbations with error-bounded bundle physics-informed neural networks
Sign Up to like & getrecommendations! Published in 2025 at "Physical Review D"
DOI: 10.1103/8mpc-8wmc
Abstract: We consider the evolution of linear matter perturbations in the context of the standard cosmological model ($\Lambda$CDM) and a phenomenological modified gravity model. We use the physics-informed neural network (PINN) bundle method, which allows to… read more here.
Keywords: physics informed; matter perturbations; informed neural; linear matter ... See more keywords