Resolution of Cosmological Singularities

TL;DR

This paper demonstrates that certain cosmological singularities in 3+1 dimensions can be resolved within string theory by embedding them into higher-dimensional solutions, such as black holes or D-brane states, avoiding true singularities.

Contribution

It introduces a framework for resolving cosmological singularities by embedding 4D cosmologies into string theory solutions, including higher-dimensional black holes and D-brane configurations.

Findings

Singularities are resolved at non-singular horizons in higher-dimensional black hole solutions.

Some singularities are plausibly resolved at D-brane bound states without traditional spacetime.

The approach connects cosmological singularities with string theory objects, offering potential resolution mechanisms.

Abstract

We show that a class of 3+1 dimensional Friedmann-Robertson-Walker cosmologies can be embedded within a variety of solutions of string theory. In some realizations the apparent singularities associated with the big bang or big crunch are resolved at non-singular horizons of higher-dimensional quasi-black hole solutions (with compactified real time); in others plausibly they are resolved at D-brane bound states having no conventional space-time interpretation.