Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On electron-positron pair production using a two level on resonant
  multiphoton approximation   We present an indepth investigation of certain aspects of the two level on
resonant multiphoton approximation to pair production from vacuum in the
presence of strong electromagnetic fields. Numerical computations strongly
suggest that a viable experimental verification of this approach using modern
optical laser technology can be achieved. It is shown that use of higher
harmonic within the presently available range of laser intensities can lead to
multiphoton processes offering up to 10^12 pairs per laser shot. Finally the
range of applicability of this approximation is examined from the point of view
of admissible values of electric field strength and energy spectrum of the
created pairs.

21
The categories of this paper are: adap-org
8
The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph
9
The categories of this paper are: nlin
30
The categories of this paper are: q-alg
2
The categories of this paper are: math
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat
4
The categories of this paper are: cond-mat
12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int