Coupled fluids model in FRW space-time

TL;DR

This paper investigates a coupled fluids model in flat FRW space-time, exploring solutions for an accelerated universe, and examines how coupling influences the universe's energy content and addresses the coincidence problem.

Contribution

It introduces a coupled fluids model in FRW space-time that includes standard matter and explores its implications for cosmic acceleration and energy content.

Findings

Coupled fluids model can produce accelerated expansion.

Model retains standard matter solution.

Coupling affects the universe's energy distribution.

Abstract

In this paper, we analyze a two coupled fluids model by investigating several solutions for accelerated universe in flat FRW space-time. One of the fluids can be identified with the matter and the model possesses the standard matter solution also. Beyond the removal of the coincidence problem, we will see how the coupling may change the description of the energy contents of the universe and which features can be aquired with respect to the standard decoupled cases.