Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electromagnetically Induced Transparency using six level atoms doped in
  the crystalline medium   Using the density matrix theory of interaction between light and matter, and
relevant parameters of the relaxation rates for a six-level model, we have
shown theoretically the possibility of realizing Electromagnetically Induced
Transparency (EIT) and Slow Light effects in Pr(+3 ion) doped YSO crystal. In
addition, we have presented a simplified method to analyse EIT effect in such a
six level atomic system. Finally, we have demonstrated results of numerical
calculation and have compared them with experimental measurements reported
recently.

16
The categories of this paper are: stat
14
The categories of this paper are: math-ph
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
11
The categories of this paper are: hep-lat
9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
6
The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
25
The categories of this paper are: patt-sol
10
The categories of this paper are: q-bio