Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Spacetime Calculation of the Calabrese-Cardy Entanglement Entropy   We calculate Sorkin's spacetime entanglement entropy of a Gaussian scalar
field for complementary regions in the 2d cylinder spacetime and show that it
has the Calabrese-Cardy form. We find that the cut-off dependent term is
universal when we use a covariant UV cut-off. In addition, we show that the
relative size-dependent term exhibits complementarity. Its coefficient is
however not universal and depends on the choice of pure state. It asymptotes to
the universal form within a natural class of pure states.

11
The categories of this paper are: hep-lat
4
The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
6
The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
0
The categories of this paper are: hep-ph
36
The categories of this paper are: cmp-lg
13
The categories of this paper are: quant-ph
9
The categories of this paper are: nlin