New Anisotropic Exact Solution in Multifield Cosmology
Andronikos Paliathanasis
TL;DR
This paper presents an exact anisotropic solution in two-scalar field cosmology, specifically for the Chiral model, describing anisotropic inflation and analyzing perturbation evolution.
Contribution
It introduces a novel exact solution for anisotropic inflation in multifield cosmology, extending previous models to include anisotropic backgrounds.
Findings
The solution models anisotropic inflation with Kantowski-Sachs geometry.
Perturbation analysis shows stability of the asymptotic solution.
Provides a new framework for studying anisotropic effects in early universe cosmology.
Abstract
In the case of two-scalar field cosmology and, specifically for the Chiral model, we determine an exact solution for the field equations with a anisotropic background space. The exact solution can describe anisotropic inflation with a Kantowski-Sachs geometry and it can be seen as the anisotropic analogue of the hyperbolic inflation. Finally, we investigate the evolution for the homogeneous perturbations around the new asymptotic solution.
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