Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum key distribution over scattering channel   Scattering of light by cloud, haze, and fog decreases the transmission
efficiency of communication channels in quantum key distribution (QKD), reduces
the system's practical security, and thus constrains the deployment of
free-space QKD. Here, we employ the wavefront shaping technology to compensate
distorted optical signals in high-loss scattering quantum channels and fulfill
a polarization-encoded BB84 QKD experiment. With this quantum channel
compensation technology, we achieve a typical enhancement of about 250 in
transmission efficiency and improve the secure key rate from 0 to
$1.85\times10^{-6}$ per sifted key. The method and its first time validation
show the great potential to expand the territory of QKD systems from lossless
channels to highly scattered ones and therefore enhances the deployment ability
of global quantum communication network.

37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
9
The categories of this paper are: nlin
1
The categories of this paper are: cs
21
The categories of this paper are: adap-org
20
The categories of this paper are: acc-phys
22
The categories of this paper are: chao-dyn
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
28
The categories of this paper are: alg-geom
32
The categories of this paper are: atom-ph
26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
27
The categories of this paper are: comp-gas
14
The categories of this paper are: math-ph