Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Chiral Symmetry breaking in Three Dimensional QED   Over the past few years three dimensional Quantum Electrodynamics (QED$_3$)
has attracted a lot of attention, because it may be an effective theory for the
underdoped and non-superconducting region of the phase diagram of high $T_c$
cuprate compounds. We present results from lattice simulations of the
non-compact version of the theory in order to address the issue of whether
chiral symmetry is spontaneously broken when the number of fermion flavours
$N_f$ is less than a critical value $N_{fc}$. Our results provide strong
evidence that QED$_3$ is chirally symmetric for $N_f \geq 1.5$, implying that a
pseudogap phase separates the superconducting phase from the antiferromagnetic
phase.

6
The categories of this paper are: astro-ph
34
The categories of this paper are: chem-ph
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
37
The categories of this paper are: supr-con
5
The categories of this paper are: gr-qc
15
The categories of this paper are: nucl-ex
25
The categories of this paper are: patt-sol
3
The categories of this paper are: physics
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
2
The categories of this paper are: math
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph