Dynamics and cosmological evolution in $$\Lambda $$-varying cosmology
G. PapagiannopoulosDepartment of Astronomy-Astrophysics-Mechanics, Faculty of Physics, University of Athens, Panepistemiopolis, 15783 Athens, GreecePavlina TsiapiSchool of Applied Mathematical and Physical Sciences, National Technical University of Athens, Iroon Polytechneiou 9, 15780 Athens, GreeceSpyros BasilakosNational Observatory of Athens, Lofos Nymphon, Thissio, PO Box 20048, 11810 Athens, GreeceAndronikos PaliathanasisInstitute of Systems Science, Durban University of Technology, Durban 4000, Republic of South Africa
2020en
ABI
Abstract
Abstract We study the dynamical properties of a large body of varying vacuum cosmologies for which dark matter interacts with vacuum. In particular, performing the critical point analysis we investigate the existence and the stability of cosmological solutions which describe de-Sitter, radiation and matter dominated eras. We find several cases of varying vacuum models that admit stable critical points, hence they can be used in describing the cosmic history.
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Cited by 20 references