Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Repulsive vacuum-induced forces on a magnetic particle   We study the possibility of obtaining a repulsive vacuum-induced force for a
magnetic point particle near a surface. Considering the toy model of a particle
with an electric-dipole transition and a large magnetic spin, we analyze the
interplay between the repulsive magnetic-dipole and the attractive
electric-dipole contributions to the total Casimir-Polder force. Particularly
noting that the magnetic-dipole interaction is longer-ranged than the
electric-dipole due to the difference in their respective characteristic
transition frequencies, we find a regime where the repulsive magnetic
contribution to the total force can potentially exceed the attractive electric
part in magnitude for a sufficiently large spin. We analyze ways to further
enhance the magnitude of the repulsive magnetic Casimir-Polder force for an
excited particle, such as by preparing it in a "super-radiant" magnetic
sub-level, and designing surface resonances close to the magnetic transition
frequency.

28
The categories of this paper are: alg-geom
6
The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin
19
The categories of this paper are: eess
26
The categories of this paper are: bayes-an
14
The categories of this paper are: math-ph
12
The categories of this paper are: nucl-th
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
27
The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an
15
The categories of this paper are: nucl-ex