Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dispersion interaction between crossed conducting wires   We compute the $T=0K$ Van der Waals (nonretarded Casimir) interaction energy
$E$ between two infinitely long, crossed conducting wires separated by a
minimum distance $D$ much greater than their radius. We find that, up to a
logarithmic correction factor, $E\propto -D^{-1}| \sin \theta | ^{-1}f(\theta)$
where $f(\theta)$ is a smooth bounded function of the angle $\theta$ between
the wires. We recover a conventional result of the form $E\propto
-D^{-4}|\sin\theta | ^{-1}g(\theta)$ when we include an electronic energy gap
in our calculation. Our prediction of gap-dependent energetics may be
observable experimentally for carbon nanotubes, either via AFM detection of the
vdW force or torque, or indirectly via observation of mechanical oscillations.
This shows that strictly parallel wires, as assumed in previous predictions,
are not needed to see a novel effect of this type.

16
The categories of this paper are: stat
7
The categories of this paper are: hep-th
13
The categories of this paper are: quant-ph
37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
3
The categories of this paper are: physics
15
The categories of this paper are: nucl-ex
22
The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin
25
The categories of this paper are: patt-sol
24
The categories of this paper are: dg-ga
2
The categories of this paper are: math
26
The categories of this paper are: bayes-an
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th