Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A linear polar molecule in a two-color cw laser field: a symmetry
  analysis   A theoretical study of the rotational dynamics of a linear polar molecule in
a two-color non-resonant cw laser field is presented. By systematically
considering the interactions of this field with the electric dipole moment,
polarizability and hyperpolarizability of the molecule, the effect of the
symmetries of the Hamiltonian on the orientation and alignment is explored in a
regime where the time-average approximation does not hold. It is shown that the
alignment and orientation satisfy certain symmetries as a function of the
phases and field strengths. On average a one-color cw laser field doest not
orient the molecule, being necessary a two-color one having odd and even
products of the laser frequency to break the head-versus-tail order
confinement.

30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph
0
The categories of this paper are: hep-ph
34
The categories of this paper are: chem-ph
4
The categories of this paper are: cond-mat
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
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The categories of this paper are: comp-gas
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
24
The categories of this paper are: dg-ga