Excited cosmic strings with superconducting currents

摘要

We present a detailed analysis of excited cosmic string solutions that possess superconducting currents.These currents can be excited inside the string core, and-if the condensate is large enough-can lead tothe excitations of the Higgs field. Next to the case with global unbroken symmetry, we discuss also theeffects of the gauging of this symmetry and show that excited condensates persist when coupled to anelectromagnetic field. The space-time of such strings is also constructed by solving the Einstein equationsnumerically and we show how the local scalar curvature is modified by the excitation. We consider therelevance of our results on the cosmic string network evolution as well as observations of primordialgravitational waves and cosmic rays.