Abstract
The present paper deals with a theoretical model for interacting Tsallis holographic dark energy (THDE) whose infrared cut-off scale is set by the Hubble length. The interaction Q between the dark sectors (dark energy and pressureless dark matter) of the universe has been assumed to be non-gravitational in nature. The functional form of Q is chosen in such a way that it reproduces well known and most used interactions as special cases. We then study the nature of the THDE density parameter, the equation of state parameter, the deceleration parameter and the jerk parameter for this interacting THDE model. Our study shows that the universe exhibits the usual thermal history, namely the successive sequence of radiation, dark matter and dark energy epochs, before resulting in a complete dark energy domination in the far future. It is shown the evolution of the Hubble parameter for our model and compared that with the latest Hubble parameter data. Finally, we also investigate both the stability and thermodynamic nature of this model in the present context.
Highlights
Many cosmological observations indicate that our Universe is experiencing an accelerated expansion phase [1,2,3,4,5]
We have studied an accelerating cosmological model for the present universe which is filled with dark matter (DM) and Tsallis holographic dark energy (THDE)
The DM is assumed to interact with the THDE whose IR cut-off scale is set by the Hubble length
Summary
Many cosmological observations indicate that our Universe is experiencing an accelerated expansion phase [1,2,3,4,5]. Zadeh et al [35] investigated the evolution of the THDE models with different IR cutoffs and studied their cosmological consequences under the assumption of a mutual interaction between the dark sectors of the universe. Following [35], in this work, we are interested in studying the dynamics of a flat FRW universe filled with a pressureless matter and THDE in an interacting scenario. We explore consequences of interacting THDE model in a more general scenario. We investigate the stability and thermodynamic nature of this particular model in the present scenario. The results of considering a mutual interaction between the dark sectors of the universe are investigated. Throughout the text, the symbol dot indicates derivative with respect to the cosmic time and a subscript zero refers to any quantity calculated at the present time
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