SCALAR FIELD COSMOLOGIES WITH PERFECT FLUID IN ROBERTSON-WALKER METRIC

TL;DR

This paper derives exact solutions for isotropic cosmological models with scalar fields, perfect fluids, and cosmological constants, revealing how fluid and curvature influence long-term evolution, including inflationary and Friedmann stages.

Contribution

It presents new exact, asymptotically stable solutions in scalar field cosmologies with perfect fluids and cosmological constants, highlighting their impact on model evolution.

Findings

Exact solutions with inflationary regimes

Stable asymptotic behaviors identified

Fluid and curvature influence late-time dynamics

Abstract

Several isotropic, homogeneous cosmological models containing a self-interacting minimally coupled scalar field, a perfect fluid source and cosmological constant are solved. New exact, asymptotically stable solutions with an inflationary regime or a final Friedmann stage are found for some simple, interesting potentials. It is shown that the fluid and the curvature may determine how these models evolve for large times.