Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Influence of energetically close orbitals on molecular high-order
  harmonic generation   We investigate the contributions from the $3\sigma_{g}$ and $1\pi_{u}$ and
molecular orbitals in high-order harmonic generation in $N_{2}$, with
particular emphasis on quantum-interference effects. We consider both the
physical processes in which the electron is freed and returns to the same
orbital, and those in which it is ionized off one orbital and recombines with
the other. We show that the quantum-interference patterns observed in the
high-order harmonic spectra are predominantly determined by the $3\sigma_{g}$
orbital. This holds both for the situation in which only the $1\pi_{ux}$
orbital is considered, and the dynamics of the electron is restricted to the
plane $p_{x}p_{z},$ or in the full three-dimensional case, if the azimuthal
angle is integrated over and the degeneracy of $1\pi_{u}$ is taken into
account.

37
The categories of this paper are: supr-con
13
The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol
0
The categories of this paper are: hep-ph
12
The categories of this paper are: nucl-th
18
The categories of this paper are: econ
19
The categories of this paper are: eess
21
The categories of this paper are: adap-org
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci
11
The categories of this paper are: hep-lat
32
The categories of this paper are: atom-ph
24
The categories of this paper are: dg-ga
27
The categories of this paper are: comp-gas