Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Coarsening dynamics driven by vortex-antivortex annihilation in
  ferromagnetic Bose-Einstein condensates   In ferromagnetic Bose-Einstein condensates (BECs), the quadratic Zeeman
effect controls magnetic anisotropy, which affects on magnetic domain pattern
formation. While the longitudinal magnetization is dominant (similar to the
Ising model) for a negative quadratic Zeeman energy, the transverse
magnetization is dominant (similar to the XY model) for a positive one. When
the quadratic Zeeman energy is positive, the coarsening dynamics is driven by
vortex-antivortex annihilation in the same way as the XY model. However, due to
superfluid flow of atoms, there exist several combinations of vortex-antivortex
pairs in ferromagnetic BECs, which makes the coarsening dynamics more
complicated than that of the XY model. We propose a revised domain growth law,
which is based on the growth law of the two-dimensional XY model, for a
two-dimensional ferromagnetic BEC with a positive quadratic Zeeman energy.

34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an
30
The categories of this paper are: q-alg
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
3
The categories of this paper are: physics
28
The categories of this paper are: alg-geom
23
The categories of this paper are: solv-int
29
The categories of this paper are: funct-an
2
The categories of this paper are: math