The circular loop equation of a cosmic string with time-varying tension
High Energy Physics - Theory
2008-12-25 v1
Abstract
The equation of circular loops of cosmic string with time-dependent tension is studied in the Minkowski spacetime and Robertson-Walker universe. We find that, in the case where the tension depends on some power of the cosmic time, cosmic string loops with time-varying tension should not collapse to form a black hole if the power is lower than a critical value.
Keywords
Cite
@article{arxiv.0801.2808,
title = {The circular loop equation of a cosmic string with time-varying tension},
author = {Hongbo Cheng and Yunqi Liu},
journal= {arXiv preprint arXiv:0801.2808},
year = {2008}
}
Comments
8 pages, 3 figures. accepted by Modern Physics Letters A