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 (18)

• Dynamics of dark energy
• Cosmological Constant - the Weight of the Vacuum
• The Case for a Positive Cosmological Lambda-term
• Quintessence, Cosmic Coincidence, and the Cosmological Constant
• Statefinder -- a new geometrical diagnostic of dark energy
• Exploring the Expanding Universe and Dark Energy using the Statefinder Diagnostic
• Planck-Scale Physics and the Peccei-Quinn Mechanism
• Statefinder diagnostic for holographic dark energy model
• Statefinder diagnostic for coupled quintessence
• Statefinder parameters for interacting dark energy
• Statefinder diagnosis for the interacting model of holographic dark energy
• Statefinder Diagnostic and w-w' Analysis for the Agegraphic Dark Energy Models without and with Interaction
• Statefinder parameters for quintom dark energy model
• Statefinder diagnostic for the modified polytropic Cardassian universe
• Dynamics of Quintessence with Thermal Interactions
• Statefinder parameters in two dark energy models
• Statefinder diagnostic for cosmology with the abnormally weighting energy hypothesis
• Quintessence and Thermal Matter

Cited by in corpus (6)

• Statefinder Diagnosis for Ricci Dark Energy
• Interacting model of new agegraphic dark energy: Cosmological evolution and statefinder diagnostic
• Cold Dark Matter in non-Standard Cosmologies, PAMELA, ATIC and Fermi LAT
• Tracking Quintessence and Cold Dark Matter Candidates
• Viscous extended holographic Ricci dark energy in the framework of standard Eckart theory
• Statefinder analysis of universe models with a viscous cosmic fluid and a fluid with a non-linear equation of state