Cosmological Mass Varying Neutrino model

**Authors:** Olga Avsajanishvili **Affiliations:** *Georgian National Astrophysical Observatory, Abastumani 0301, Georgia ** School of Natural Sciences and Medicine, Ilia State University, 3/5 Cholokashvili Ave., Tbilisi 0162, Georgia The cosmological model beyond the standard ΛCDM scenario, namely, the Mass Varying Neutrino (MaVaN) model is considered. Within the framework of the MaVaN model, the interaction through the Yukawa coupling of the fermionic field and scalar field with an inverse power law Ratra-Peebles potential is investigated. The expansion rate of the universe, the total thermodynamic potential of the coupled fermionic and scalar fields, as well as the evolution of neutrino mass depending on the model parameter of the Ratra-Peebles potential of the scalar field are studied.