Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Reflection and absorption of QWs irradiated by light pulses in a strong
  magnetic field   It has been shown that the non-sinusoidal character oscillations appear in
the transmitted, reflected and absorbed light fluxes when light pulses
irradiate a semiconductor quantum well (QW), containing a set of a large number
of the equidistant energy levels of electronic excitations. The oscillation
amplitude is comparable to the flux values for the short pulses, duration of
which \gamma_l^{-1} \leq \hbar/\Delta E. A damping echo of the exciting pulse
appears through the time intervals 2\pi\hbar/\Delta E in the case of the very
short light pulses \gamma_l^{-1}\ll \hbar/\Delta E. Symmetrical and
asymmetrical pulses with a sharp front have been considered. Our theory is
applicable for the narrow QWs in a strong magnetic field, when the equidistant
energy levels correspond to the electron-hole pairs with different Landau
quantum numbers.

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The categories of this paper are: atom-ph
14
The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
11
The categories of this paper are: hep-lat
16
The categories of this paper are: stat
8
The categories of this paper are: hep-ex
27
The categories of this paper are: comp-gas
0
The categories of this paper are: hep-ph
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The categories of this paper are: cmp-lg
18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc
12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex