Thermodynamics of Spinor Quintom

TL;DR

This paper explores the thermodynamic behavior of Spinor Quintom dark energy, analyzing entropy bounds, stability conditions, and the validity of the Generalized Second Law across different cosmological phases.

Contribution

It provides a detailed thermodynamic analysis of Spinor Quintom dark energy, including entropy bounds, stability criteria, and the relation to quantum perturbations, which is novel in this context.

Findings

GSL validity depends on cosmological phase and model parameters.

Thermodynamic stability is achieved for specific parameter ranges.

Thermal quantities relate to entropy and volume, linking thermodynamics with quantum stability.

Abstract

We discuss the thermodynamic properties of dark energy (DE) with Quintom matter in spinor scenario. (1).Using the Cardy-Verlinde formula, we investigate the conditions of validity of the Generalized Second Law of thermodynamics (GSL) in the four evolutionary phases of Spinor Quintom-B model. We also clarify its relation with three cosmological entropy bounds. (2). We take thermodynamic stability of the combination between Spinor Quintom DE and the generalized Chaplygin Gas (GCG) perfect fluid into account, and we find that in the case of $\beta>0$ and $0<T<T_0$, the system we consider is thermodynamically stable. (3) Making use of the Maxwell Relation and integrability condition, we derive all thermal quantities as functions of either entropy or volume, and present the relation with quantum perturbation stability.