Non-singular global cosmic strings

Y. Verbin, A. L. Larsen

Research output: Contribution to journalArticlepeer-review


Non-singular global cosmic strings are found in a non-linear sigma model with a potential term for a self-gravitating complex scalar field. Stationary solutions with angular momentum and possibly linear momentum are obtained by assuming an oscillatory dependence of the scalar field on t, φ and z. This dependence has an effect similar to gauging the global U(1) symmetry of the model, which is actually a Kaluza-Klein reduction from four to three spacetime dimensions. The method of analysis can be regarded as an extension of the gravito-electromagnetism formalism beyond the weak field limit.

Original languageEnglish
Pages (from-to)2374-2379
Number of pages6
JournalInternational Journal of Modern Physics A
Issue number11
StatePublished - 30 Apr 2005


  • Cosmic strings
  • Gravito-electromagnetism
  • Sigma models


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