Evolution of a Non-Abelian Cosmic String Network

Details Evolution of a Non-Abelian Cosmic String Network Evolution of a Non-Abelian Cosmic String Network

1997-06-17

arxiv.org/abs/astro-ph/9706182v3

Phys.Rev. D57 (1998) 3317-3339

Astronomy and Astrophysics

Astrophysics

89 pages, Tex, figures included, phyzzx macros included. Revised version: minor changes in wording and layout; some errors cor

Scientific paper

10.1103/PhysRevD.57.3317

We describe a numerical simulation of the evolution of an $S_3$ cosmic string network which takes fully into account the non-commutative nature of the cosmic string fluxes and the topological obstructions which hinder strings from moving past each other or intercommuting. The influence of initial conditions, string tensions, and other parameters on the network's evolution is explored. Contrary to some previous suggestions, we find no strong evidence of the ``freezing'' required for a string-dominated cosmological scenario. Instead, the results in a broad range of regimes are consistent with the familiar scaling law; i.e., a constant number of strings per horizon volume. The size of this number, however, can vary quite a bit, as can other overall features. There is a surprisingly strong dependence on the statistical properties of the initial conditions. We also observe a rich variety of interesting new structures, such as light string webs stretched between heavier strings, which are not seen in Abelian networks.

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