Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Domain Wall Motion in the Presence of Nuclear Spins   We investigate the motion of a domain wall in the presence of a dynamical
hyperfine field. At temperature T high compared to the hyperfine coupling, the
nuclear spins create a spatially random potential landscape, with dynamics
dictated by the nuclear relaxation time $T_2$. The distribution of the domain
wall relaxation times (both in the thermal and quantum regimes) can show a long
tail, characteristic of stochastic processes where rare events are important.
Here, these are due to occasional strong fluctuations in the nuclear spin
polarisation.

14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
0
The categories of this paper are: hep-ph
23
The categories of this paper are: solv-int
21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
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The categories of this paper are: chao-dyn
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The categories of this paper are: nucl-ex
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The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math
19
The categories of this paper are: eess
37
The categories of this paper are: supr-con