On the Anisotropic Big Bang Cosmology With A General Non-Linear EoS

TL;DR

This paper investigates how a general non-linear equation of state influences anisotropic early universe cosmology, demonstrating isotropization effects and phantom-like behavior in certain cases within general relativity, brane world, and loop quantum gravity frameworks.

Contribution

It introduces a novel non-linear EoS model that explains early universe isotropization and explores its implications across different quantum gravity theories.

Findings

Non-linear EoS leads to early universe isotropization.

The model exhibits phantom-like behavior under specific conditions.

Implications for brane world and loop quantum gravity scenarios.

Abstract

We study the anisotropic Big Bang cosmology for a general non-linear equation of state (EoS) in standard general relativity cosmology in early times. According to brane world cosmology and loop quantum gravity which introduce a quadratic term in the energy density, we study a non-linear EoS with a general nonlinear term in the energy density. We show that this general non-linear term isotropize the universe at early times. And also, we find out this model has a phantom like behavior for special case.