Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comparison between one- and two-channel Kondo effects in mesoscopic
  systems   There are strong recent indications that the Kondo phenomena play important
role in the electronic transport and dephasing mechanism for some of the
experimentally investigated metallic samples. The spin and the orbital Kondo
problem with two-level systems provide very similar behavior above the Kondo
temperature. Below the Kondo temperature the behavior is drastically different
as in the latter case the entropy remains non zero. In the following several
results derived earlier by different methods are simply reproduced by the
time-ordered diagram technique in the leading logarithmic approximation valid
above the Kondo temperature.

23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
15
The categories of this paper are: nucl-ex
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
11
The categories of this paper are: hep-lat
8
The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an
12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
27
The categories of this paper are: comp-gas
25
The categories of this paper are: patt-sol
37
The categories of this paper are: supr-con