Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum Depinning of a Magnetic Skyrmion   We investigate the quantum depinning of a weakly driven skyrmion out of an
impurity potential in a mesoscopic magnetic insulator. For small barrier
height, the Magnus force dynamics dominates over the inertial one, and the
problem is reduced to a massless charged particle in a strong magnetic field.
The universal form of the WKB exponent, the rate of tunneling, and the
crossover temperature between thermal and quantum tunneling is provided,
independently of the detailed form of the pinning potential. The results are
discussed in terms of macroscopic parameters of the insulator Cu2OSeO3 and
various skyrmion radii. We demonstrate that small enough magnetic skyrmions,
with a radius of ~ 10 lattice sites, consisting of some thousands of spins, can
behave as quantum objects at low temperatures in the mK regime.

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The categories of this paper are: funct-an
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The categories of this paper are: q-bio
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The categories of this paper are: adap-org
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The categories of this paper are: comp-gas
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The categories of this paper are: hep-th
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The categories of this paper are: math-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: chao-dyn
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The categories of this paper are: astro-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: dg-ga
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The categories of this paper are: eess
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The categories of this paper are: q-alg
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The categories of this paper are: cs
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The categories of this paper are: bayes-an
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The categories of this paper are: math