Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bidirectional propagation of cold atoms in a "stadium" shaped magnetic
  guide   We demonstrate the bi-directional propagation of more than 10 7 atoms (87 Rb)
around a "stadium" shaped magnetic ring that encloses an area of 10.9 cm 2,
with a flux density exceeding 10 11 atoms sec -1 cm -2 . Atoms are loaded into
the guide from a 2D + MOT at one side of the "stadium". An optical standing
wave pulse is applied to increase the propagation velocity of atoms along the
waveguide. The atom sample fills the entire ring in 200 ms when
counterpropagating atom sections of the original atom cloud recombine at their
initial positions after a full revolution. We discuss a possible extension of
this result to a guided atom ring interferometer.

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The categories of this paper are: acc-phys
16
The categories of this paper are: stat
17
The categories of this paper are: q-fin
2
The categories of this paper are: math
7
The categories of this paper are: hep-th
19
The categories of this paper are: eess
25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
23
The categories of this paper are: solv-int