Anisotropic cosmological models with spinor and scalar fields and viscous fluid in presence of a $\Lambda$ term: qualitative solutions

TL;DR

This paper investigates the qualitative behavior of anisotropic Bianchi type I cosmological models incorporating spinor and scalar fields, viscous fluid, and a cosmological constant, revealing viscosity-induced blow-up phenomena.

Contribution

It provides a comprehensive qualitative analysis of the coupled spinor, scalar, and viscous fluid fields in anisotropic cosmology with a $$ term, including graphical illustrations and blow-up conditions.

Findings

Viscosity induces blow-up in the system.

Derived equations for volume scale, energy density, and Hubble constant.

Graphical solutions illustrating system behavior.

Abstract

The study of a self-consistent system of interacting spinor and scalar fields within the scope of a Bianchi type I (BI) gravitational field in presence of a viscous fluid and $\Lambda$ term has been carried out. The system of equations defining the evolution of the volume scale of BI universe, energy density and corresponding Hubble constant has been derived. The system in question has been thoroughly studied qualitatively. Corresponding solutions are graphically illustrated. The system in question is also studied from the view point of blow up. It has been shown that the blow up takes place only in presence of viscosity.