Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spatial distribution of atoms in the field of the criss-cross standing
  bichromatic light waves   We show that properly detuning the carrier frequency of each of the
criss-cross bichromatic waves from the transition frequency of the atom, it is
possible to form a two-dimensional trap for atoms if the intensity of the waves
is sufficiently large. For zero and near zero initial phases of waves, and also
for $\pi$ and near $\pi$ phase shift between criss-cross waves a dynamic
spatial structure of square cells with the side $\lambda /\sqrt{2}$ is formed.
Numerical simulations are carried out for sodium atoms.

9
The categories of this paper are: nlin
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
37
The categories of this paper are: supr-con
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
10
The categories of this paper are: q-bio
30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th
11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
22
The categories of this paper are: chao-dyn
5
The categories of this paper are: gr-qc