Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A magneto-electric quantum wheel   Here we show that self-propulsion in quantum vacuum may be achieved by
rotating or aggregating magneto-electric nano-particles. The back-action
follows from changes in momentum of electro-magnetic zero-point fluctuations,
generated in magneto-electric materials. This effect may provide new tools for
investigation of the quantum nature of our world. It might also serve in the
future as a "quantum wheel" to correct satellite orientation in space.

27
The categories of this paper are: comp-gas
14
The categories of this paper are: math-ph
20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
4
The categories of this paper are: cond-mat
32
The categories of this paper are: atom-ph