Electroweak axion string and superconductivity

Abstract

We study the axion strings with the electroweak gauge flux in the DFSZ axion model and show that these strings, called the electroweak axion strings, can exhibit superconductivity without fermionic zero modes. We construct three types of electroweak axion string solutions. Among them, the string with $W$-flux can be lightest in some parameter space, which leads to a stable superconducting cosmic string. We also show that a large electric current can flow along the string due to the Peccei-Quinn scale much higher than the electroweak scale. This large current induces a net attractive force between the axion strings with the same topological charge, which opens a novel possibility that the axion strings form Y-junctions in the early universe.

arXiv comment35 pages, 8 figures; v3: published version

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Cited by in corpus (14)

• Emission of gravitational waves by superconducting cosmic strings
• Generalised velocity-dependent one-scale model for current-carrying strings
• Stable $Z$-strings with topological polarization in two Higgs doublet model
• CMB anisotropies generated by cosmic string loops
• Quantum current dissipation in superconducting strings and vortons
• Cosmological evolution of Witten superconducting string networks
• QCD Axion Strings or Seeds?
• Cosmic Microwave Background Signatures from Current-carrying Cosmic Strings
• Dynamical simulations of colliding superconducting strings
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• Superconducting strings in the two-Higgs doublet model
• Current induction and macroscopic forces for superconducting strings
• Gravitational Wave Mountains: current-carrying domain walls