Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Observation of magneto-optical rotation effects in cold $^{87}$Rb atoms
  in an integrating sphere   We present a modified scheme for detection of the magneto-optical rotation
(MOR) effect, where a linearly polarized laser field is interacting with cold
$^{87}$Rb atoms in an integrating sphere. The rotation angle of the probe
beam's polarization plane is detected in the experiment. The results indicate
that the biased magnetic field, the probe light intensity and detuning, and the
cold atoms' temperature are key parameters for the MOR effect. This scheme may
improve the contrast of the rotation signal and provide an useful approach for
high contrast cold atom clocks and magnetometers.

10
The categories of this paper are: q-bio
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The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom
5
The categories of this paper are: gr-qc
23
The categories of this paper are: solv-int
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The categories of this paper are: nucl-ex
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The categories of this paper are: eess
31
The categories of this paper are: ao-sci
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The categories of this paper are: adap-org
22
The categories of this paper are: chao-dyn
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
6
The categories of this paper are: astro-ph