Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Entanglement Entropy of Coupled Conformal Field Theories and Fermi
  Liquids   In this paper we calculate the entanglement entropy of two coupled gapless
systems in general spatial dimension d. The gapless systems can be either
conformal field theories (CFT), or Fermi liquids. We assume the two systems are
coupled uniformly in a h-dimensional submanifold of the space, with 0 <= h <=
d. We will focus on the scaling of the entanglement entropy with the size of
the system, and its scaling with the inter-system coupling constant g. Three
approaches will be used for our calculation: (1) exact calculation with ground
state wave-functional, (2) perturbative calculation with functional path
integral, (3) scaling argument.

11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
14
The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con
3
The categories of this paper are: physics
18
The categories of this paper are: econ
17
The categories of this paper are: q-fin