Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An escape of vector matter-wave soliton from a parabolic trap   We show that a vector matter-wave soliton in Bose-Einstein condensate loaded
into an optical lattice can escape from a trap formed by a parabolic potential,
resembling a Hawking emission. The particle-antiparticle pair is emulated by a
low-amplitude bright-bright soliton in two-component Bose-Einstein condensate
with effective masses of opposite signs. It is shown that the parabolic
potential leads to a spatial separation of BEC components. One component with
chemical potential in a semi-infinite gap exerts periodical oscillations, while
the other BEC component, with negative effective mass, escapes from the trap.
The mechanism of atoms transfer from one BEC component to another by spatially
periodic linear coupling term is discussed.

36
The categories of this paper are: cmp-lg
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph
13
The categories of this paper are: quant-ph
14
The categories of this paper are: math-ph
24
The categories of this paper are: dg-ga
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
29
The categories of this paper are: funct-an
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
18
The categories of this paper are: econ
1
The categories of this paper are: cs
0
The categories of this paper are: hep-ph