Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Pedagogical introduction to the entropy of entanglement for Gaussian
  states   The most useful measure of a bipartite entanglement is the von Neumann
entropy of either of the reduced density matrices. For a particular class of
continuous-variable states, the Gaussian states, the entropy of entanglement
can be expressed rather elegantly in terms of the symplectic eigenvalues,
elements that characterize a Gaussian state and depend on the correlations of
the canonical variables. We give a pedagogical step-by-step derivation of this
result and provide some insights that can be useful in practical calculations.

10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph
36
The categories of this paper are: cmp-lg
6
The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org
7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
2
The categories of this paper are: math
4
The categories of this paper are: cond-mat