Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cyclotron resonance in a two-dimensional electron gas with long-range
  randomness   We show that the the cyclotron resonance in a two-dimensional electron gas
has non-trivial properties if the correlation length of the disorder is larger
than the de Broglie wavelength: (a) the lineshape assumes three different forms
in strong, intermediate, and weak magnetic fields (b) at the transition from
the intermediate to the weak fields the linewidth suddenly collapses due to an
explosive growth in the fraction of electrons with a diffusive-type dynamics.

9
The categories of this paper are: nlin
16
The categories of this paper are: stat
18
The categories of this paper are: econ
22
The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin
23
The categories of this paper are: solv-int
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat
19
The categories of this paper are: eess
30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th
27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org