Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Continuous-Variable Quantum Key Distribution with Gaussian Modulation --
  The Theory of Practical Implementations   Quantum key distribution using weak coherent states and homodyne detection is
a promising candidate for practical quantum-cryptographic implementations due
to its compatibility with existing telecom equipment and high detection
efficiencies. However, despite the actual simplicity of the protocol, the
security analysis of this method is rather involved compared to
discrete-variable QKD. In this article we review the theoretical foundations of
continuous-variable quantum key distribution (CV-QKD) with Gaussian modulation
and rederive the essential relations from scratch in a pedagogical way. The aim
of this paper is to be as comprehensive and self-contained as possible in order
to be well intelligible even for readers with little pre-knowledge on the
subject. Although the present article is a theoretical discussion of CV-QKD,
its focus lies on practical implementations, taking into account various kinds
of hardware imperfections and suggesting practical methods to perform the
security analysis subsequent to the key exchange. Apart from a review of well
known results, this manuscript presents a set of new original noise models
which are helpful to get an estimate of how well a given set of hardware will
perform in practice.

24
The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
14
The categories of this paper are: math-ph
9
The categories of this paper are: nlin
16
The categories of this paper are: stat
6
The categories of this paper are: astro-ph
4
The categories of this paper are: cond-mat
19
The categories of this paper are: eess
30
The categories of this paper are: q-alg
28
The categories of this paper are: alg-geom