Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Improving the performance of twin-field quantum key distribution with
  advantage distillation technology   In this work, we apply two methods to improve the performance of a practical
twin-field quantum key distribution system under collective attack. Firstly, to
improve the secure key rate, we apply the error rate in X basis, Y basis and Z
basis to characterize the quantum channel. Secondly, we apply the advantage
distillation method to further improve the secure key rate and transmission
distance. Compared with the previous analysis result given by Maeda, Sasaki and
Koashi [Nature Communication 10, 3140 (2019)], the secure key rate obtained by
our analysis method will be increased at least 7%. By increasing the
loss-independent misalignment error to 12%, the previous analysis method cannot
overcome the rate-distance bound. However, our analysis method can still
overcome the rate-distance bound when the misalignment error is as large as
41%. More surprisingly, we prove that twin-field quantum key distribution can
generate positive secure key even if the misalignment error is arbitrarily
close to 50%, thus our analysis method can significantly improve the
performance of a practical twin-field quantum key distribution system.

33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga
28
The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph
5
The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics
35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg