Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electron-phonon coupling in single walled carbon nanotubes determined by
  shot noise   We have measured shot noise in metallic single-walled carbon nanotubes of
length L=1 $\mu$m and have found strong suppression of noise with increasing
voltage. We conclude that the coupling of electron and phonon baths at
temperatures $T_e$ and $T_{ph}$ is described at intermediate bias (20 mV $<$
\vv $\lesssim $ 200 mV) by heat flow equation $P=\Sigma L (T_e^3-T_{ph}^3)$
where $\Sigma \sim 3 \cdot 10^{-9}$ W/mK$^3$ due to electron interaction with
acoustic phonons, while at higher voltages optical phonon - electron
interaction leads to $P =\kappa_{op} L [N (T_e)-N(T_{ph})]$ where $N(T)=
1/(\exp(\hbar\Omega/k_BT)-1)$ with optical phonons energy $\hbar \Omega$ and
$\kappa_{op}=2 \cdot 10^{2}$ W/m.

32
The categories of this paper are: atom-ph
25
The categories of this paper are: patt-sol
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
6
The categories of this paper are: astro-ph
29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
19
The categories of this paper are: eess
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
10
The categories of this paper are: q-bio
23
The categories of this paper are: solv-int
30
The categories of this paper are: q-alg