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normal core in the tunneling barrier. Supercurrents circulate just around the mathematical center of a fluxon, which is situated with the (insulating) Josephson barrier. Again, the magnetic flux created by circulating
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modeling, a fluxon is a discretized magnetic field line, representing a finite amount of magnetic flux in a localized bundle in the model. Fluxon models are explicitly designed to preserve the
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circulate around the normal core. The magnetic field through such a whisker and its neighborhood, which has size of the order of London penetration depth
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Superconductor-Insulator-Superconductor Josephson tunnel junctions
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