Future singularity in an anisotropic universe

TL;DR

This paper explores new types of future singularities caused by anisotropy in the universe, develops a reconstruction method using scalar fields, and analyzes the physical implications of these singularities.

Contribution

It introduces a new class of future singularities specific to anisotropic cosmologies and proposes a novel scalar-field-based reconstruction method.

Findings

Identification of new anisotropic singularities

A reconstruction method using four scalar fields

An explicit example of anisotropy growth leading to singularity

Abstract

We investigate future singularities originating from the anisotropy in the Universe. We formulate a new class of singularities in the homogeneous and anisotropic universe, comparing them with the known singularities in the homogeneous and isotropic universe. We also discuss the physical consequences of the new singularities. Moreover, we develop a novel reconstruction method for the anisotropic universe by introducing four scalar fields to reconstruct cosmological models in which future singularities appear. We present an explicit example where the anisotropy may grow in the future up to singularity.