Interacting modified variable Chaplygin gas in a non-flat universe

Abstract

A unified model of dark energy and matter is presented using the modified variable Chaplygin gas for interacting dark energy in a non-flat universe. The two entities interact with each other non-gravitationally which involves a coupling constant. Due to dynamic interaction, the variation in this constant arises that henceforth changes the equations of state of these quantities. We have derived the effective equations of state corresponding to matter and dark energy in this interacting model. Moreover, the case of phantom energy is deduced by putting constraints on the parameters involved.

On the resolution of cosmic coincidence problem and phantom crossing with triple interacting fluids

“…In recent years, the usual coincidence problem is addressed by proposing an exotic interaction between dark energy and matter in which energy from ρ Λ is diluted or decayed into the ρ m [7,8,9,10,11,12,13,14,15,16,17,18]. It is recently proposed that if these two components interact then some energy might dissipate into a third component ρ x which is as yet hypothetical [19].…”

Holographic Dark Energy Model with Chaplygin Gas

“…The holographic dark energy field and the corresponding potential depend on three parameters namely, A, α and n. The potential and the kinetic energy given by eqs. (11) and (12) reduce to that form obtained by Setare [26] for A = 0, n = 0andα = 1. However, the result obtained by Paul et al [27] recovered for n = 0.…”

“…Gorini et al [11] using the above scheme obtained the corresponding homogeneous scalar field φ(t) in a potential V(φ) which can be used to obtain a viable cosmological model with modified Chaplygin gas. Another form of EOS for Chaplygin gas [12] is considered recently which is given by…”

“…So, in this paper we considered non-flat case also. We give here a generalized expression for the potential and the kinetic energy term considering a modified variable Chaplygin gas [12,13]. The holographic dark energy field and the corresponding potential depend on three parameters namely, A, α and n. The potential and the kinetic energy given by eqs.…”

Observational Data Fitting to Constrain Variable Modified Chaplygin Gas in the Background of Horava-Lifshitz Gravity

“…Variable modified Chaplygin gas (VMCG) is one among them. The equation of state of VMCG is given as [16,17] …”