Stabilizing semilocal strings by polarization

Minoru Eto, Muneto Nitta, Kohei Sakurai

Research output: Contribution to journalArticle

Abstract

Semilocal strings are vortices in the extended Abelian-Higgs model with two complex Higgs scalar fields among which a global SU(2) symmetry acts. They are known to be stable (unstable against expansion) in type-I (II) superconductors, in which gauge field is heavier (lighter) than the Higgs scalar field. In this paper, we find that vortices can be stabilized in the whole parameter region including the type-II region by adding a potential term breaking the SU(2) symmetry. We construct numerical solutions in various parameters and determine the vortex phase diagram consisting of six phases. In two phases, a vortex is polarized, that is, split into two half-quantized vortices with a certain distance, to form a vortex molecule, while in the rests a vortex is identical to the conventional Abrikosov-Nielsen-Olesen vortex.

Original languageEnglish
Article number48
JournalJournal of High Energy Physics
Volume2016
Issue number10
DOIs
Publication statusPublished - 2016 Oct 1

Keywords

  • Gauge Symmetry
  • Global Symmetries
  • Solitons Monopoles and Instantons

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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