Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Crow instability in trapped Bose-Einstein condensates   We show theoretically that elongated vortex-antivortex dipoles can be created
controllably in trapped Bose-Einstein condensates, using known experimental
techniques. Vortex dipoles of sufficient length are unstable and cascade into
slow vortex rings which ultimately decay via sound emission. This instability
of antiparallel vortex line elements, which self-generates Kelvin waves on
vortex loops and in trapped atomic gases, may play a role in bridging the
Kelvin-wave and Kolmogorov-Richardson cascades of quantum turbulence.

15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
3
The categories of this paper are: physics
36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
17
The categories of this paper are: q-fin
24
The categories of this paper are: dg-ga
6
The categories of this paper are: astro-ph