Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Topological $s$-wave superconductors driven by electron correlation   It is interesting to ask whether electron interaction can turn a
topologically trivial superconductor into a nontrivial one without the presence
of spin-obital coupling. In this paper we solve a correlated $s$-wave
superconducting model exactly. The variation of the fermion number parity of
the superconducting ground state as a function of the electron interaction is
calculated and the topological phase diagram is obtained. Topological $s$-wave
superconducting states are revealed in the doped Mott insulators, which is
further confirmed by the numerical investigation of the topological boundary
zero mode.

28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
1
The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
18
The categories of this paper are: econ
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess
31
The categories of this paper are: ao-sci
6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
22
The categories of this paper are: chao-dyn