Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Topological impact of a simple self-replication geometric structure with
  great application potential in vacuum pumping and photovoltaic industry   Topological effects exist from a macroscopic system such as the universe to a
microscopic system described by quantum mechanics. We show here that an
interesting geometric structure can be created by the self replication
procedure of a square with an enclosed circle, in which the sum of the circles
area will remain the same but the sum of the circumference will increase. It is
demonstrated by means of Monte Carlo simulations that these topological
features have great impacts to the vacuum pumping probability and the photon
absorption probability of the active surface. The results show significant
improvement of the system performance and have application potential in vacuum
pumping of large research facilities such as a nuclear fusion reactor,
synchrotron and in photovoltaic industry.

11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
26
The categories of this paper are: bayes-an
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
32
The categories of this paper are: atom-ph
4
The categories of this paper are: cond-mat
23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
28
The categories of this paper are: alg-geom