Non-Singular Stationary Global Strings

Details Non-Singular Stationary Global Strings Non-Singular Stationary Global Strings

2004-07-06

arxiv.org/abs/hep-th/0407034v2

Phys.Rev.D70:085004,2004

Physics

High Energy Physics

High Energy Physics - Theory

20 pages Latex, 12 PS figures included. Minor corrections. Version to appear in Phys.Rev.D

Scientific paper

10.1103/PhysRevD.70.085004

A field-theoretical model for non-singular global cosmic strings is presented. The model is a non-linear sigma model with a potential term for a self-gravitating complex scalar field. Non-singular stationary solutions with angular momentum and possibly linear momentum are obtained by assuming an oscillatory dependence of the scalar field on t, phi 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. Some D=3 self-dual solutions are also discussed.

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