Nonsingular global strings
Ruth Gregory
TL;DR
It is shown that this time dependence takes a specific form, a de Sitter-like expansion along the length of the string, and an argument for the existence of such a solution is given, estimating the rate of expansion.
Abstract
We examine the possibility that time dependence might remove the singular nature of global string spacetimes. We first show that this time dependence takes a specific form -- a de-Sitter like expansion along the length of the string and give an argument for the existence of such a solution, estimating the rate of expansion. We compare our solution to the singular Cohen-Kaplan spacetime.