Effects of anisotropy on the sign-changeable interacting Tsallis holographic dark energy

Abstract

We consider a spatially homogeneous and anisotropic Bianchi type-I universe which is filled by pressureless dark matter (DM) and Tsallis holographic dark energy (THDE). We assume the two dark components of the universe are interacting with each other throughout a sign-changeable mutual interaction term. Various infra-red (IR) cutoffs are studied, and it is obtained that all models display classical instability by themselves at the future [Formula: see text]. Moreover, we find out that some models can cross the phantom line. In order to have a more comprehensive study, the statefinder diagnostic and the [Formula: see text] plane are also investigated showing that the model parameters significantly affect the evolution trajectories in the [Formula: see text] and [Formula: see text] planes.