Iranian Journal of Physics Research

Cosmology in Rastall theory with non-minimal matter coupling

Document Type : Original Article

Author

SH Shahidi

Department of Physics, Damghan University, Damghan, Iran

https://doi.org/10.47176/ijpr.21.4.61273
Abstract
In this paper we will consider cosmological implications of the Rastall theory with a non-minimal coupling with baryonic matter fields. In Rastall theory, the matter energy-momentum tensor is not conserved and the non-conservation is related to the curvature. We will generalize this relation to become dependent on both curvature and matter fields. Cosmology of the model shows more matter abundance compared to the  model. We will show that the dynamical system of the model is the same as with an additional degree of freedom.

Keywords

cosmology
modified gravity
Rastall theory
matter couplings
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