Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An alternative realization of spontaneous emission cancelation via Field
  Generated Coherence (FGC)   In contrast to the traditional Spontaneous Generated Coherence (SGC), Field
Generated Coherence (FGC)-based atomic scheme is presented for spontaneous
emission cancellation. It is easy to achieve externally controllable
experimental trapping condition in this 4-field-driven 5-level atomic system.
Consequently, due to the FGC the decay from the central dressed
\emph{bare-energy-state} of the set of upper three closely spaced hyperfine
decaying states of Sodium D2 line is completely cancelled under the trapping
condition, exhibiting a novel phenomenon of a \textit{dark bare-energy-state}%
. Extending to an atomic system of simple probability loss, based on Sodium D1
line, the bright atom can also be darkened under its trapping condition,
representing another experimentally viable, novel and interesting phenomenon.

33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat
22
The categories of this paper are: chao-dyn
25
The categories of this paper are: patt-sol
0
The categories of this paper are: hep-ph
17
The categories of this paper are: q-fin
14
The categories of this paper are: math-ph
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
7
The categories of this paper are: hep-th
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
21
The categories of this paper are: adap-org