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Now showing items 1-4 of 4

    • Cosmic strings stabilized by fermion fluctuations 

      Weigel H.; Quandt M.; Graham N. (2012)
      We provide a thorough exposition of recent results on the quantum stabilization of cosmic strings. Stabilization occurs through the coupling to a heavy fermion doublet in a reduced version of the standard model. The study ...

    • Fermion energies in the background of a cosmic string 

      Graham N.; Quandt M.; Weigel H. (2011)
      We provide a thorough exposition, including technical and numerical details, of previously published results on the quantum stabilization of cosmic strings. Stabilization occurs through the coupling to a heavy fermion ...

    • Gauge invariance and vacuum energies of non-Abelian string-configurations 

      Weigel H.; Quandt M. (2010)
      We improve on a method to compute the fermion contribution to the vacuum polarization energy of string-like configurations in a non-Abelian gauge theory. We establish the new method by numerically verifying the invariance ...

    • Stable charged cosmic strings 

      Weigel H.; Quandt M.; Graham N. (2011)
      We study the quantum stabilization of a cosmic string by a heavy fermion doublet in a reduced version of the standard model. We show that charged strings, obtained by populating fermionic bound state levels, become stable ...