Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Improvement of two-way continuous-variable quantum key distribution
  using optical amplifiers   The imperfections of a receiver's detector affect the performance of two-way
continuous-variable quantum key distribution protocols and are difficult to
adjust in practical situations. We propose a method to improve the performance
of two-way continuous-variable quantum key distribution by adding a
parameter-adjustable optical amplifier at the receiver. A security analysis is
derived against a two-mode collective entangling cloner attack. Our simulations
show that the proposed method can improve the performance of protocols as long
as the inherent noise of the amplifier is lower than a critical value, defined
as the tolerable amplifier noise. Furthermore, the optimal performance can
approach the scenario where a perfect detector is used.

36
The categories of this paper are: cmp-lg
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
4
The categories of this paper are: cond-mat
28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
17
The categories of this paper are: q-fin
20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th
6
The categories of this paper are: astro-ph