Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Interference Phenomena in Spontaneous Emission from Driven Multilevel
  Atoms   We study spontaneous emission from an atom under the action of laser fields.
We consider two different energy level diagrams. The first one consists of two
levels resonantly driven by laser radiation where either of levels may decay to
a separate level. For such a system we show that the presence of the second
decay channel may deteriorate the destructive interference occurring in case of
one decay channel because of Autler-Townes effect. The second diagram
represents two two-level resonantly driven systems with the upper levels
decaying to a common level. For this diagram we show that there is no
interference between the two decay channels when the laser fields are described
in the Fock representation, while in case of definite-phase classical fields
such interference takes place and is partially or completely destructive or
constructive depending on the initial conditions and on the mutual orientation
of the spontaneous emission dipole moments.

11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
19
The categories of this paper are: eess
9
The categories of this paper are: nlin
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex
27
The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
37
The categories of this paper are: supr-con