Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effects of spatially inhomogeneous atomic interactions on Bose-Einstein
  condensates in optical lattices   An interplay of optical lattices and nonlinear impurities in controlling the
dynamics of Bose-Einstein condensate bright solitons is investigated using
effective potential approach. The ability of pushing the solitons into or away
from the impurity region by changing both lattice and impurity parameters is
suggested. A possibility for the existence of stable fundamental gap solitons,
which appear to satisfy an inverted Vakhitov-Kolokolov criterion, is examined.

35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an
14
The categories of this paper are: math-ph
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
6
The categories of this paper are: astro-ph
15
The categories of this paper are: nucl-ex
17
The categories of this paper are: q-fin
18
The categories of this paper are: econ
0
The categories of this paper are: hep-ph
23
The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol
16
The categories of this paper are: stat
8
The categories of this paper are: hep-ex