Quantum GravityNo Access

NON-SINGULAR GLOBAL COSMIC STRINGS

Y. VERBIN

Department of Natural Sciences, The Open University of Israel, P.O.B. 39328, Tel Aviv 61392, Israel

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and

A. L. LARSEN

Department of Physics, University of Southern Denmark, Campusvej 55, 5230 Odense M, Denmark

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https://doi.org/10.1142/S0217751X0502464XCited by:0 (Source: Crossref)

Abstract

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.

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