Numerical simulations of stiff fluid gravitational singularities

TL;DR

This paper presents numerical simulations of non-symmetric stiff fluid spacetimes approaching singularities, revealing that the singularity is spacelike with local, non-oscillatory dynamics.

Contribution

It provides the first detailed numerical analysis of generic stiff fluid singularities without symmetry assumptions.

Findings

Singularity is spacelike in these models.

Spacetime dynamics become local near the singularity.

Approach to the singularity is non-oscillatory.

Abstract

Numerical simulations of the approach to the singularity in spacetimes with stiff fluid matter are presented here. The spacetimes examined have no symmetries and can be regarded as representing the general behavior of singularities in the presence of such matter. It is found that the singularity is spacelike and that as it is approached, the spacetime dynamics becomes local and non-oscillatory.