Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Enhanced harmonic generation and wave-mixing via two-color multiphoton
  excitation of atoms/molecules   We consider harmonics generation and wave-mixing by two-color multi photon
resonant excitation of three-level atoms/molecules in strong laser fields. The
coherent part of the spectra corresponding to multicolor harmonics generation
is investigated. The obtained analytical results on the basis of generalized
rotating wave approximation are in a good agreement with numerical
calculations. The results applied to the hydrogen atom and homonuclear diatomic
molecular ion show that one can achieve efficient generation of moderately high
multicolor harmonics via multiphoton resonant excitation by appropriate laser
pulses.

35
The categories of this paper are: mtrl-th
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
23
The categories of this paper are: solv-int
24
The categories of this paper are: dg-ga
33
The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg
2
The categories of this paper are: math
22
The categories of this paper are: chao-dyn
4
The categories of this paper are: cond-mat
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs