Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Exchange Coulomb interaction in nanotubes: Dispersion of Langmuir waves   Microscopic derivation of the Coulomb exchange interaction for electrons
located on the nanotubes is presented. Our derivation is based on the
many-particle quantum hydrodynamic method. We demonstrate the role of the
curvature of the nanocylinders on the force of the exchange interaction. We
calculate corresponding dispersion dependencies for electron oscillations on
the nanotubes.

23
The categories of this paper are: solv-int
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas
10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
15
The categories of this paper are: nucl-ex
2
The categories of this paper are: math