Tsallis holographic dark energy with hybrid expansion law.

In this work, we explore the Tsallis holographic dark energy (THDE) model with IR cutoff as Granda–Oliveros horizon describing the Universe experiencing an accelerating expansion phase in the framework of flat Friedmann–Lemaître–Robertson–Walker (FLRW) Universe. The Universe evolution from earlier decelerated to the current accelerated phase is exhibited by the deceleration parameter acquired in the THDE model. By the value of the Tsallis parameter δ , the equation of state (EoS) parameter for the THDE model represents the rich behavior of the Cosmos as, the quintessence era ( ω T ≥ − 1), crossing the phantom divide line and phantom era ( ω T < − 1). The squared sound speed v s 2 also suggests that the THDE model is classically stable at present. Also, the correspondence with the quintessence and phantom scalar field for the THDE model is analyzed to describe the accelerated expansion of the Universe. [ABSTRACT FROM AUTHOR]