Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Superconducting and Anti-Ferromagnetic Phases of Spacetime   A correspondence between the $SO(5)$ theory of High-T${}_C$ superconductivity
and antiferromagnetism, put forward by Zhang and collaborators, and a theory of
gravity arising from symmetry breaking of a $SO(5)$ gauge field is presented. A
physical correspondence between the order parameters of the unified SC/AF
theory and the generators of the gravitational gauge connection is conjectured.
A preliminary identification of regions of geometry, in solutions of Einstein's
equations describing charged-rotating black holes embedded in deSitter
spacetime, with SC and AF phases is carried out.

31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
36
The categories of this paper are: cmp-lg
28
The categories of this paper are: alg-geom
14
The categories of this paper are: math-ph
23
The categories of this paper are: solv-int
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
0
The categories of this paper are: hep-ph
12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas
7
The categories of this paper are: hep-th
25
The categories of this paper are: patt-sol
1
The categories of this paper are: cs
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg