Cosmological solutions in spatially curved universes with adiabatic particle production

TL;DR

This paper investigates cosmological models with adiabatic particle production, revealing solutions that explain current cosmic acceleration and unify early and late-time acceleration, converging to thermal equilibrium.

Contribution

It introduces two models with adiabatic particle production that describe cosmic acceleration and unification of early and late-time acceleration.

Findings

Models depict current cosmic acceleration without inflation.

Solutions unify early and late-time acceleration.

Asymptotic convergence to thermal equilibrium.

Abstract

We perform a qualitative and thermodynamic study of two models when one takes into account adiabatic particle production. In the first one, there is a constant particle production rate, which leads to solutions depicting the current cosmic acceleration but without inflation. The other one has solutions that unify the early and late time acceleration. These solutions converge asymptotically to the thermal equilibrium.