Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Radiation field quantization in a nonlinear dielectric with dispersion
  and absorption   The problem of quantizing the radiation field inside a nonlinear dielectric
is studied. Based on the quantization of radiation in a linear dielectric which
includes absorption and dispersion, we extend the theory in order to treat also
nonlinear optical processes. We derive propagation equations in space and time
for the quantized radiation field including the effects of linear absorption
and dispersion as well as nonlinear optical effects. As a special case we
derive the propagation equation of a narrow-frequency band light pulse in a
Kerr medium.

32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
3
The categories of this paper are: physics
11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
37
The categories of this paper are: supr-con
7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci