Skyrmions and Semilocal Strings in Cosmology

Abstract

It has been pointed out that cosmic string solutions can exist in gauge field theories with broken symmetry even when ${\pi }_1(G/H)$ is trivial. The stability of such semilocal defects is not guaranteed by topology and depends on dynamical considerations. In the literature it has been tacitly assumed that if stable, such strings would form in the Early Universe in a manner analogous to the formation of a network of more robust topologically-stable strings. In this paper we find that except for unnaturally small values of the correlation length, a network of semilocal strings does not form. Instead, delocalized skyrmionic string configurations, which expand with the Hubble flow, dominate.

27 pages, IAS-HEP 92/92

References in corpus (3)

• Semilocal Topological Defects
• Detailed Stability Analysis of Electroweak Strings
• Semilocal strings and monopoles

Cited by in corpus (16)

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• Twisted Superconducting Semilocal Strings
• SO and USp Kahler and Hyper-Kahler Quotients and Lumps
• Analytic topologically non-trivial solutions of the (3+1)-dimensional $U(1)$ gauged Skyrme model and extended duality
• Semilocal Cosmic String Networks
• Semilocal string formation in two dimensions
• D-term cosmic strings from N=2 Supergravity
• Topological Defects with Non-Symmetric Core
• Evolution of Semilocal String Networks: I. Large-scale Properties
• Hydrodynamics of three-dimensional skyrmions in frustrated magnets
• Analytic Models for the Evolution of Semilocal String Networks
• Scaling Violations with Textures in Two-Dimensional Phase-Ordering
• Exact solution of the Einstein-Skyrme model in a Kantowski-Sachs spacetime
• Intercommutation of Semilocal Strings and Skyrmions
• On the formation of non-topological string networks