Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Alignment induced re-configurable walls for patterning and assembly of
  liquid crystal skyrmions   Skyrmions have attracted rapidly growing interest due to their topological
properties and unique aspects for potential novel applications such as data
storage and soft robotics. They can also serve as key elements for materials by
design, self-assembly, and functional soft materials. While not real particles,
these skyrmions behave like particles-they interact with each other and can be
actuated by means of electric field, surface anchoring, and light. On the other
hand, they are field configurations which have properties not possessed by real
particles. Here, we show that, by means of alignment induced attractive and
repulsive walls, skyrmions in chiral nematic liquid crystals can be precisely
controlled and programmed to serve as suitable building blocks for the
realization of the above goals. Our work may stimulate new experimental efforts
and concomitant applications in this direction.

13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
25
The categories of this paper are: patt-sol
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
19
The categories of this paper are: eess
11
The categories of this paper are: hep-lat
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
6
The categories of this paper are: astro-ph