Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Raman processes and effective gauge potentials   A new technique is described by which light-induced gauge potentials allow
systems of ultra-cold neutral atoms to behave like charged particles in a
magnetic field. Here, atoms move in a uniform laser field with a spatially
varying Zeeman shift and experience an effective magnetic field. This technique
is applicable for atoms with two or more internal ground states. Finally, an
explicit model of the system using a single-mode 2D Gross-Pitaevskii equation
yields the expected vortex lattice.

6
The categories of this paper are: astro-ph
7
The categories of this paper are: hep-th
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ
9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
31
The categories of this paper are: ao-sci
25
The categories of this paper are: patt-sol