Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Three-dimensional skyrmions in spin-2 Bose-Einstein condensates   We introduce topologically stable three-dimensional skyrmions in the cyclic
and biaxial nematic phases of a spin-2 Bose-Einstein condensate. These
skyrmions exhibit exceptionally high mapping degrees resulting from the
versatile symmetries of the corresponding order parameters. We show how these
structures can be created in existing experimental setups and study their
temporal evolution and lifetime by numerically solving the three-dimensional
Gross-Pitaevskii equations for realistic parameter values. Although the biaxial
nematic and cyclic phases are observed to be unstable against transition
towards the ferromagnetic phase, their lifetimes are long enough for the
skyrmions to be imprinted and detected experimentally.

14
The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
25
The categories of this paper are: patt-sol
1
The categories of this paper are: cs
16
The categories of this paper are: stat
30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
15
The categories of this paper are: nucl-ex
8
The categories of this paper are: hep-ex
0
The categories of this paper are: hep-ph
2
The categories of this paper are: math
31
The categories of this paper are: ao-sci