Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Solitons in two-dimensional Bose-Einstein condensates   The excitations of a two-dimensional (2D) Bose-Einstein condensate in the
presence of a soliton are studied by solving the Kadomtsev-Petviashvili
equation which is valid when the velocity of the soliton approaches the speed
of sound. The excitation spectrum is found to contain states which are
localized near the soliton and have a dispersion law similar to the one of the
stable branch of transverse oscillations of a 1D gray soliton in a 2D
condensate. By using the stabilization method we show that these localized
excitations behave as resonant states coupled to the continuum of free
excitations of the condensate.

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The categories of this paper are: quant-ph
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The categories of this paper are: eess
7
The categories of this paper are: hep-th
9
The categories of this paper are: nlin
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th
21
The categories of this paper are: adap-org
1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga
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The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom
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The categories of this paper are: q-fin
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The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
2
The categories of this paper are: math