Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gaussian quantum channels   This article provides an elementary introduction to Gaussian channels and
their capacities. We review results on the classical, quantum, and entanglement
assisted capacities and discuss related entropic quantities as well as
additivity issues. Some of the known results are extended. In particular, it is
shown that the quantum conditional entropy is maximized by Gaussian states and
that some implications for additivity problems can be extended to the Gaussian
setting.

21
The categories of this paper are: adap-org
29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
32
The categories of this paper are: atom-ph
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
5
The categories of this paper are: gr-qc
6
The categories of this paper are: astro-ph
27
The categories of this paper are: comp-gas
2
The categories of this paper are: math
14
The categories of this paper are: math-ph
16
The categories of this paper are: stat
17
The categories of this paper are: q-fin