Cosmological implications of interacting polytropic gas dark energy model in non-flat universe

TL;DR

This paper explores an interacting polytropic gas dark energy model in a non-flat universe, analyzing its evolution, behavior, and correspondence with scalar field theories, revealing its potential to explain cosmic acceleration.

Contribution

It introduces a detailed analysis of the interacting polytropic gas dark energy model, including its cosmological implications and scalar field correspondence, which is a novel approach in dark energy modeling.

Findings

The model can behave as quintessence or phantom dark energy.

The model's evolution crosses the phantom divide.

The universe transitions from decelerated to accelerated expansion.

Abstract

The polytropic gas model is investigated as an interacting dark energy scenario. The cosmological implications of the model including the evolution of EoS parameter $w_{\Lambda}$, energy density $\Omega_{\Lambda}$ and deceleration parameter $q$ are investigated. We show that, depending on the parameter of model, the interacting polytropic gas can behave as a quintessence or phantom dark energy. In this model, the phantom divide is crossed from below to up. The evolution of $q$ in the context of polytropic gas dark energy model represents the decelerated phase at the early time and accelerated phase later. The singularity of this model is also discussed. Eventually, we establish the correspondence between interacting polytropic gas model with tachyon, K-essence and dilaton scalar fields. The potential and the dynamics of these scalar field models are reconstructed according to the evolution of interacting polytropic gas.