Anomalous dispersion of density waves in the early universe with positive cosmological constant

2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/34088Density perturbations in the flat (K=0) Robertson-Walker universe with radiation ($p=ε/3$) and positive cosmological constant ($Λ>0$) are investigated. The phenomenon of anomalous dispersion of acoustic waves on $Λ$ is discussed.7 pagesGeneral Relativity and Quantum CosmologyAnomalous dispersion of density waves in the early universe with positive cosmological constanttext