Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Entanglement of a 3D generalization of the Kitaev model on the diamond
  lattice   We study the entanglement properties of a three dimensional generalization of
the Kitaev honeycomb model proposed by Ryu [Phys. Rev. B 79, 075124, (2009)].
The entanglement entropy in this model separates into a contribution from a
$Z_2$ gauge field and that of a system of hopping Majorana fermions, similar to
what occurs in the Kitaev model. This separation enables the systematic study
of the entanglement of this 3D interacting bosonic model by using the tools of
non-interacting fermions. In this way, we find that the topological
entanglement entropy comes exclusively from the $Z_2$ gauge field, and that it
is the same for all of the phases of the system. There are differences,
however, in the entanglement spectrum of the Majorana fermions that distinguish
between the topologically distinct phases of the model. We further point out
that the effect of introducing vortex lines in the $Z_2$ gauge field will only
change the entanglement contribution of the Majorana fermions. We evaluate this
contribution to the entanglement which arises due to gapless Majorana modes
that are trapped by the vortex lines.

23
The categories of this paper are: solv-int
17
The categories of this paper are: q-fin
25
The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
24
The categories of this paper are: dg-ga
16
The categories of this paper are: stat
26
The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
5
The categories of this paper are: gr-qc
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph