Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Coherent Optical Processes on Cs D$_2$ line Magnetically Induced
  Transitions   The increased spectral resolution allowed by the use of extremely thin vapor
cells has led to the observation of interesting behaviour of alkali transitions
when placed in a magnetic field. Particularly, transitions obeying an apparent
$F_e-F_g\equiv\Delta F =\pm2$ selection rule, referred to as
magnetically-induced (MI) transitions, have their probabilities largely
increase in the intermediate interaction regime while being null at zero and
higher magnetic fields. With an 800 nm-thick Cs vapor cell placed in a field up
to 1.5 kG, we show here that the generation of electromagnetically induced
transparency (EIT), realized in $\Lambda$-systems involving $\Delta F =- 2$ MI
transitions, is only possible when both the coupling and probe beams are
$\sigma^-$-circular polarized, demonstrating that EIT is affected by magnetic
circular dichroism. A similar rule of thumb can be extrapolated for $\Delta F
=+2$ MI transitions and $\sigma^+$ polarization. Because of the high frequency
shift slope (typ. 4 MHz/G), the generation of EIT resonances involving MI
transitions is interesting, especially in the context of growing attention
towards micro-machined alkali vapor cell sensors.

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The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
9
The categories of this paper are: nlin
27
The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an
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The categories of this paper are: cond-mat
23
The categories of this paper are: solv-int
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
36
The categories of this paper are: cmp-lg
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The categories of this paper are: econ
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The categories of this paper are: stat
0
The categories of this paper are: hep-ph