Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Perturbative treatment of the multichannel interacting resonant level
  model in steady state non-equilibrium   We consider the steady state non-equilibrium physics of the multichannel
interacting resonant level model in the weak coupling regime. By using the
scattering state method we show in agreement with the rate equations that the
negative differential conductance at large enough voltages is due to the
renormalization of the hopping amplitude thus of the vertex.

22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
16
The categories of this paper are: stat
30
The categories of this paper are: q-alg
19
The categories of this paper are: eess
36
The categories of this paper are: cmp-lg
29
The categories of this paper are: funct-an
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
24
The categories of this paper are: dg-ga
2
The categories of this paper are: math
35
The categories of this paper are: mtrl-th
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The categories of this paper are: q-fin
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex