Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Repulsive lateral van der Waals force   In the literature, it has been shown that between a neutral polarizable
particle and a conducting plane surface arises an attractive dispersive force.
A change on this geometry, for instance by the presence of a hole, can be felt
by an anisotropic particle as a repulsive force, normal to the surface. In the
present paper, we introduce a single slight protuberance, with a certain
characteristic width, in the geometry of a perfectly conducting plane, and show
that, beyond a correction to the normal attractive force already present in the
absence of the protuberance, a neutral anisotropic polarizable particle feels a
lateral van der Waals force which, under certain circumstances, repels it
towards points that are several widths distant from the center of the
protuberance. Moreover, we show that a similar repulsive effect arises in the
classical context, involving a neutral particle with a permanent dipole moment.

35
The categories of this paper are: mtrl-th
7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
3
The categories of this paper are: physics
1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an
16
The categories of this paper are: stat
28
The categories of this paper are: alg-geom
2
The categories of this paper are: math
23
The categories of this paper are: solv-int
29
The categories of this paper are: funct-an
14
The categories of this paper are: math-ph