Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Pulse shape effects on the electron-positron pair production in strong
  laser fields   The pair-production process in the presence of strong linearly polarized
laser fields with a subcycle structure is considered. Laser pulses with
different envelope shapes are examined by means of a nonperturbative numerical
technique. We analyze two different "flat" envelope shapes and two shapes
without a plateau for their various parameters including the carrier-envelope
phase. The resonant Rabi oscillations, momentum distribution of particles
created, and total number of pairs are studied. It is demonstrated that all
these characteristics are very sensitive to the pulse shape.

24
The categories of this paper are: dg-ga
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
2
The categories of this paper are: math
33
The categories of this paper are: plasm-ph
27
The categories of this paper are: comp-gas
32
The categories of this paper are: atom-ph
8
The categories of this paper are: hep-ex
13
The categories of this paper are: quant-ph
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
25
The categories of this paper are: patt-sol