Regular Article – Theoretical Physics
Cosmological constraints on entropic cosmology with matter creation
Department of Physics, School of Natural Sciences, National University of Sciences and Technology, H-12, 44000, Islamabad, Pakistan
2 Institute of Physics, University of Szczecin, Wielkopolska 15, 70-451, Szczecin, Poland
Accepted: 27 March 2021
Published online: 20 April 2021
We investigate entropic force cosmological models with the possibility of matter creation and energy exchange between the bulk and the horizon of a homogeneous and isotropic flat Universe. We consider three different kinds of entropy, Bekenstein’s, the non-extensive Tsallis–Cirto’s, and the quartic entropy, plus some phenomenological functional forms for matter creation rate to model different entropic force models and put the observational constraints on them. We show that while most of them are indistinguishable from a standard CDM scenario, the Bekenstein entropic force model with a matter creation rate proportional to the Hubble parameter is statistically highly favored over CDM. As a general result, we also find that both the Hawking temperature parameter , which relates the energy exchange between the bulk and the boundary of the Universe, and the matter creation rate , must be very small to reproduce observational data.
© The Author(s) 2021
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