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A fluxon is a quantum of magnetic flux, and may have one of several meanings:


In the context of superconductivity, a fluxon (aka Abrikosov vortex) is a small whisker of normal phase surrounded by superconducting phase. Supercurrents circulate around its center. The magnetic field through such a whisker and its neighborhood, which has size of the order of London penetration depth λL (˜100 nm), is quantized because of the phase properties of the magnetic vector potential in quantum electrodynamics.

In the context of long Josephson junctions, a fluxon (aka Josephson vortex) is made of circulating supercurrents and has no normal core. Supercurrents circulate just around mathematical center of a fluxon. Again, the magnetic flux created by circulating supercurrents is equal to a magnetic flux quantum Φ0.

In the context of numerical MHD 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 topology of the magnetic field, overcoming numerical resistivity effects in Eulerian models.

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Fluxon". A list of authors is available in Wikipedia.
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