Statefinder Diagnostic for Quintessence with or without Thermal Interaction

Abstract

The cosmological dynamics of minimally coupled scalar field that couples to the background matter with thermal interactions is investigated by using statefinder diagnostics. The time evolution of the statefinder pairs $\{r,s\}$ and $\{r,q\}$ are obtained under the circumstance that different values of model parameters are chosen. We show that the thermal coupling term does not affect the location of the late-time attractor, but exert an influence on the evolution of the statefinder parameters. The most notable feature of the $r-s$ plane for the thermal coupling model which is distinguished from the other dark energy models is that some part of the curve with thermal coupling can form a closed loop in the second quadrant ($r>1,s<0$).

10 pages, 6 figures, accepted for publication in IJMPD

References in corpus (3)

• Statefinder Diagnostic and w-w' Analysis for the Agegraphic Dark Energy Models without and with Interaction
• Statefinder diagnostic for the modified polytropic Cardassian universe
• Statefinder parameters in two dark energy models

Cited by in corpus (2)

• Statefinder Diagnosis for Ricci Dark Energy
• Statefinder analysis of universe models with a viscous cosmic fluid and a fluid with a non-linear equation of state