Quantum tunneling of superconducting string currents
Jose J. Blanco-Pillado, Ken D. Olum, Alexander Vilenkin
DOI 10.1103/PhysRevD.66.023506 · Physical Review D
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Abstract
We investigate the decay of current on a superconducting cosmic string through quantum tunneling. We construct the instanton describing tunneling in a simple bosonic string model, and estimate the decay rate. The tunneling rate vanishes in the limit of a chiral current. This conclusion, which is supported by a symmetry argument, is expected to apply in general. It has important implications for the stability of chiral vortons.
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