Magnetic decay of knots

http://arxiv.org/PS_cache/arxiv/pdf/...103.3518v1.pdf

This article describes the decay of knotted flux tubes. I can't tell
whether this would apply in a neutron star core which is superfluid
and superconductive. I couldn't figure out what the dissipative
process is, if any. I would guess it is assumed to be electrical
resistance and viscosity.

Even if the knot does decay, is it correct that topological properties
of the field are conserved.

Here is a video of a simulation of the decay.
http://www.youtube.com/watch?v=f_K7G...eature=related