Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Application of High Intensity THz Pulses for Gas High Harmonic
  Generation   The main effects of an intense THz pulse on gas high harmonic generation are
studied via trajectory analysis on the single atom level. Spectral and temporal
modifications to the generated radiation are highlighted.

31
The categories of this paper are: ao-sci
23
The categories of this paper are: solv-int
17
The categories of this paper are: q-fin
26
The categories of this paper are: bayes-an
24
The categories of this paper are: dg-ga
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
20
The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat