Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comment on 'Hysteresis, Switching, and Negative Differential Resistance
  in Molecular Junctions: a Polaron Model', by M. Galperin, M.A. Ratner, and A.
  Nitzan, Nano Lett. 5, 125 (2005)
14
The categories of this paper are: math-ph
12
The categories of this paper are: nucl-th
8
The categories of this paper are: hep-ex
19
The categories of this paper are: eess
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
36
The categories of this paper are: cmp-lg
5
The categories of this paper are: gr-qc
28
The categories of this paper are: alg-geom
17
The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex
29
The categories of this paper are: funct-an
13
The categories of this paper are: quant-ph