Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Long-Distance Transfer and Routing of Static Magnetic Fields   We show how the static magnetic field of a finite source can be transferred
and routed to arbitrary long distances. This is achieved by using
transformation optics, which results in a device made of a material with a
highly anisotropic magnetic permeability. We show that a simplified version of
the device, made by a superconducting-ferromagnet hybrid, also leads to an
excellent transfer of the magnetic field. The latter is demonstrated with a
proof-of-principle experiment where a ferromagnet tube coated with a
superconductor improves the transfer of static magnetic fields with respect to
conventional methods by a 400\% factor over distances of 14cm.

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The categories of this paper are: nucl-ex
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The categories of this paper are: q-fin
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The categories of this paper are: q-alg
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The categories of this paper are: funct-an
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The categories of this paper are: comp-gas
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The categories of this paper are: hep-ph
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The categories of this paper are: physics
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The categories of this paper are: gr-qc
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The categories of this paper are: bayes-an
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The categories of this paper are: nlin
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The categories of this paper are: cmp-lg
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The categories of this paper are: stat
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The categories of this paper are: chem-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: math
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The categories of this paper are: solv-int