Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Superconductivity in quantum-dot superlattices composed of quantum wire
  networks   Based on calculations using the local density approximation, we propose
quantum wire networks with square and plaquette type lattice structures that
form quantum dot superlattices. These artificial structures are well described
by the Hubbard model. Numerical analysis reveals a superconducting ground state
with transition temperatures $T_c$ of up to 90 mK for the plaquette, which is
more than double the value of 40 mK for the square lattice type and is
sufficiently high to allow for the experimental observation of
superconductivity.

21
The categories of this paper are: adap-org
8
The categories of this paper are: hep-ex
14
The categories of this paper are: math-ph
25
The categories of this paper are: patt-sol
5
The categories of this paper are: gr-qc
24
The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th
2
The categories of this paper are: math
10
The categories of this paper are: q-bio
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th