Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Topological field theory and thermal responses of interacting
  topological superconductors   We investigate the three-dimensional, time-reversal invariant topological
superconductors with generic interaction by their response to external fields.
The first description is a gravitational topological field theory, which gives
a $Z_2$ classification of topological superconductors, and predicts a
half-quantized thermal Hall effect on the surface. The second description
introduces an s-wave proximity pairing field on the surface, and the associated
topological defects give an integer $Z$ classification of the topological
superconductors.

15
The categories of this paper are: nucl-ex
14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
16
The categories of this paper are: stat
6
The categories of this paper are: astro-ph
30
The categories of this paper are: q-alg
32
The categories of this paper are: atom-ph
12
The categories of this paper are: nucl-th
21
The categories of this paper are: adap-org
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol