Thermodynamical description of the ghost dark energy model

TL;DR

This paper explores the thermodynamical properties of ghost dark energy and its generalizations, analyzing entropy changes, interactions with dark matter, and the effects of thermal fluctuations in the universe.

Contribution

It introduces a thermodynamic framework for ghost dark energy, including entropy variations and the impact of thermal fluctuations on dark sector interactions.

Findings

Entropy expressions for ghost dark energy derived

Interaction effects on dark energy equation of state analyzed

Relation between dark sector interactions and thermodynamic fluctuations established

Abstract

In this paper, we point out thermodynamical description of ghost dark energy and its generalization to the early universe. Thereinafter, we find expressions for the entropy changes of these dark energy candidates. In addition, considering thermal fluctuations, thermodynamics of the dark energy component interacting with a dark matter sector is addressed. {We will also find the effects of considering the coincidence problem on the mutual interaction between the dark sectors, and thus the equation of state parameter of dark energy.} Finally, we derive a relation between the mutual interaction of the dark components of the universe, accelerated with the either ghost dark energy or its generalization, and the thermodynamic fluctuations.