Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Realization of the Najafi-Golestanian microswimmer   A paradigmatic microswimmer is the three-linked-spheres model, which follows
a minimalist approach for propulsion by shape shifting. As such, it has been
the subject of numerous analytical and numerical studies. In this Rapid
Communication, an experimental three-linked-spheres swimmer is created by
self-assembling ferromagnetic particles at an air-water interface. It is
powered by a uniform oscillating magnetic field. A model, using two harmonic
oscillators, reproduces the experimental findings. Because the model remains
general, the same approach could be used to design a variety of efficient
microswimmers.

1
The categories of this paper are: cs
9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio
2
The categories of this paper are: math
0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
5
The categories of this paper are: gr-qc
25
The categories of this paper are: patt-sol
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
13
The categories of this paper are: quant-ph
23
The categories of this paper are: solv-int
17
The categories of this paper are: q-fin