Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nonlinear dynamics of atoms in a crossed optical dipole trap   We explore the classical dynamics of atoms in an optical dipole trap formed
by two identical Gaussian beams propagating in perpendicular directions. The
phase space is a mixture of regular and chaotic orbits, the later becoming
dominant as the energy of the atoms increases. The trapping capabilities of
these perpendicular Gaussian beams are investigated by considering an atomic
ensemble in free motion. After a sudden turn on of the dipole trap, a certain
fraction of atoms in the ensemble remains trapped. The majority of these
trapped atoms has energies larger than the escape channels, which can be
explained by the existence of regular and chaotic orbits with very long escape
times.

14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
6
The categories of this paper are: astro-ph
5
The categories of this paper are: gr-qc
17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
7
The categories of this paper are: hep-th
25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
37
The categories of this paper are: supr-con
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn