Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Confinement, Vacuum Structure: from QCD to Quantum Gravity   A minimal Lorentz gauge gravity model with R^2-type Lagrangian is proposed.
In the absence of torsion the model admits a topological phase with unfixed
metric. The model possesses a minimal set of dynamical degrees of freedom for
the torsion. Remarkably, the torsion has the same number of dynamical of-shell
degrees of freedom as the metric tensor. We trace an analogy between the
structure of the quantum chromodynamics and the structure of possible theory of
quantum gravity.

33
The categories of this paper are: plasm-ph
4
The categories of this paper are: cond-mat
14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
11
The categories of this paper are: hep-lat
16
The categories of this paper are: stat
1
The categories of this paper are: cs
36
The categories of this paper are: cmp-lg
6
The categories of this paper are: astro-ph
23
The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
21
The categories of this paper are: adap-org
30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex